FORM 10-K
                    SECURITIES AND EXCHANGE COMMISSION
                         WASHINGTON, D.C.  20549
(Mark One)

[x]    Annual  report  pursuant to Section 13 or 15(d)  of  the  Securities
       Exchange Act of 1934

For the fiscal year ended December 31, 2003

                                    OR

[ ]    Transition  report pursuant to Section 13 or 15(d) of the Securities
       Exchange Act of 1934

For the transition period from                      to

Commission File Number 0-19601

         Southwest Royalties Institutional Income Fund X-B, L.P.
                (Exact name of registrant as specified in
                    its limited partnership agreement)

Delaware                                                    75-2332174
(State or other jurisdiction                             (I.R.S. Employer
of incorporation or organization)                       Identification No.)

407 N. Big Spring, Suite 300, Midland, Texas                  79701
(Address of principal executive office)                     (Zip Code)

Registrant's telephone number, including area code  (432) 686-9927

       Securities registered pursuant to Section 12(b) of the Act:

                                   None

       Securities registered pursuant to Section 12(g) of the Act:

                      limited partnership interests

Indicate by check mark whether registrant (1) has filed reports required to
be  filed  by  Section 13 or 15(d) of the Securities Exchange Act  of  1934
during  the  preceding  12  months (or for such  shorter  period  that  the
registrant was required to file such reports), and (2) has been subject  to
such filing requirements for the past 90 days:     Yes X   No

Indicate by check mark if disclosure of delinquent filers pursuant to  Item
405  of  Regulation S-K is not contained herein, and will not be contained,
to  the  best of registrant's knowledge, in definitive proxy or information
statements incorporated by reference in Part III of this Form 10-K  or  any
amendment to this Form 10-K.     [x]

Indicate  by check mark whether the registrant is an accelerated filer  (as
defined in Exchange Act Rule 12b-2).     Yes     No  X

The  registrant's  outstanding  securities  consist  of  Units  of  limited
partnership  interests for which there exists no established public  market
from which to base a calculation of aggregate market value.

The  total  number of pages contained in this report is 48.   The  exhibits
begin on page 45.

<PAGE>
                            Table of Contents

Item                                                                   Page

                                  Part I

     Glossary of Oil and Gas Terms                                       3

 1.  Business                                                            5

 2.  Properties                                                          9

 3.  Legal Proceedings                                                  11

 4.  Submission of Matters to a Vote of Security Holders                11

                                 Part II

 5.  Market for Registrant's Common Equity, Related
     Stockholder Matters and Issuer Purchases of Equity Securities      12

 6.  Selected Financial Data                                            13

 7.  Management's Discussion and Analysis of
     Financial Condition and Results of Operations                      14

7A.  Quantitative and Qualitative Disclosures About Market Risk         20

 8.  Financial Statements and Supplementary Data                        21

 9.  Changes in and Disagreements with Accountants
     on Accounting and Financial Disclosure                             37

9A.  Controls and Procedures                                            37

                                 Part III

10.  Directors and Executive Officers of the Registrant                 38

11.  Executive Compensation                                             40

12.  Security Ownership of Certain Beneficial Owners and
     Management and Related Stockholder Matters                         40

13.  Certain Relationships and Related Transactions                     41

14.  Principal Accountant Fees and Services                             41

                                 Part IV

15.  Exhibits, Financial Statement Schedules, and Reports
     on Form 8-K                                                        42

     Signatures                                                         43

<PAGE>
Glossary of Oil and Gas Terms
The  following are abbreviations and definitions of terms commonly used  in
the  oil  and  gas industry that are used in this filing.  All  volumes  of
natural gas referred to herein are stated at the legal pressure base to the
state  or area where the reserves exit and at 60 degrees Fahrenheit and  in
most instances are rounded to the nearest major multiple.

     Bbl. One stock tank barrel, or 42 United States gallons liquid volume.

     Developmental well. A well drilled within the proved area of an oil or
natural gas reservoir to the depth of a stratigraphic horizon known  to  be
productive.

     Exploratory well. A well drilled to find and produce oil or gas in  an
unproved  area to find a new reservoir in a field previously  found  to  be
productive of oil or natural gas in another reservoir or to extend a  known
reservoir.

     Farm-out arrangement. An agreement whereby the owner of a leasehold or
working  interest agrees to assign his interest in certain specific acreage
to  an  assignee,  retaining some interest, such as an  overriding  royalty
interest,  subject  to  the drilling of one (1)  or  more  wells  or  other
specified performance by the assignee.

     Field. An area consisting of a single reservoir or multiple reservoirs
all  grouped  on  or  related to the same individual geological  structural
feature and/or stratigraphic condition.

     Mcf. One thousand cubic feet.

     Net  Profits  Interest.  An agreement whereby  the  owner  receives  a
specified  percentage of the defined net profits from a producing  property
in  exchange for consideration paid.  The net profits interest  owner  will
not otherwise participate in additional costs and expenses of the property.

     Oil. Crude oil, condensate and natural gas liquids.

     Overriding  royalty  interest. Interests that  are  carved  out  of  a
working  interest, and their duration is limited by the term of  the  lease
under which they are created.

     Present  value  and  PV-10 Value. When used with respect  to  oil  and
natural gas reserves, the estimated future net revenue to be generated from
the  production of proved reserves, determined in all material respects  in
accordance  with  the  rules and regulations of the  SEC  (generally  using
prices  and costs in effect as of the date indicated) without giving effect
to  non-property  related  expenses  such  as  general  and  administrative
expenses,  debt service and future income tax expenses or to  depreciation,
depletion  and  amortization, discounted using an annual discount  rate  of
10%.

<PAGE>

     Production  costs.  Costs incurred to operate and maintain  wells  and
related  equipment  and facilities, including depreciation  and  applicable
operating  costs  of support equipment and facilities and  other  costs  of
operating and maintaining those wells and related equipment and facilities.

     Proved Area. The part of a property to which proved reserves have been
specifically attributed.

     Proved  developed oil and gas reserves. Reserves that can be  expected
to  be  recovered from existing wells with existing equipment and operating
methods.

     Proved properties. Properties with proved reserves.

     Proved  oil  and gas reserves. The estimated quantities of crude  oil,
natural  gas, and natural gas liquids with geological and engineering  data
that  demonstrate  with  reasonable certainty to be recoverable  in  future
years   from  known  reservoirs  under  existing  economic  and   operating
conditions, i.e., prices and costs as of the date the estimate is made.

     Proved  undeveloped  reserves.  Reserves  that  are  expected  to   be
recovered from new wells on undrilled acreage, or from existing wells where
a relatively major expenditure is required for recompletion.

     Reservoir.  A porous and permeable underground formation containing  a
natural  accumulation  of  producible  oil  or  gas  that  is  confined  by
impermeable  rock  or water barriers and is individual  and  separate  from
other reservoirs.

     Royalty  interest.  An  interest in an oil and  natural  gas  property
entitling  the  owner to a share of oil or natural gas production  free  of
costs of production.

     Working  interest.  The operating interest that gives  the  owner  the
right  to  drill, produce and conduct operating activities on the  property
and a share of production.

     Workover.  Operations  on  a producing well  to  restore  or  increase
production.

<PAGE>

                                  Part I

Item 1.   Business

General
Southwest  Royalties Institutional Income Fund X-B, L.P. (the "Partnership"
or  "Registrant")  was  organized  as a  Delaware  limited  partnership  on
November  27,  1990.  The offering of limited partnership  interests  began
December  1,  1990 as part of a shelf offering registered  under  the  name
Southwest  Royalties Institutional 1990-91 Income Program (the  "Program").
Minimum  capital  requirements for the Partnership were met  on  March  11,
1991,  with  the  offering  of  limited  partnership  interests  concluding
September  30,  1991,  but  continuing for other  partnerships  within  the
program. The Partnership has no subsidiaries.

The Partnership has acquired interests in producing oil and gas properties,
and  produced and marketed the crude oil and natural gas produced from such
properties.  In most cases, the Partnership purchased royalty or overriding
royalty interests and working interests in oil and gas properties that were
converted into net profits interests or other non-operating interests.  The
Partnership  purchased  either all or part of the  rights  and  obligations
under various oil and gas leases.

The  principal executive offices of the Partnership are located at  407  N.
Big Spring, Suite 300, Midland, Texas, 79701.  The Managing General Partner
of  the  Partnership,  Southwest Royalties,  Inc.  (the  "Managing  General
Partner")   and  its  staff  of  81  individuals,  together  with   certain
independent  consultants  used  on an "as needed"  basis,  perform  various
services on behalf of the Partnership, including the selection of  oil  and
gas properties and the marketing of production from such properties.  H. H.
Wommack, III, Chairman, Director, President and Chief Executive Officer  of
the  Managing General Partner, is also a general partner.  The  Partnership
has no employees.

Introductory Note - Statement of Financial Accounting Standard No. 143
The  Partnership implemented SFAS No. 143 effective January  1,  2003  (See
Note 3 to the Partnership's financial statements).

Introductory Note - Depletion Method
During  2002, the Partnership changed its method of providing for depletion
from  the  units-of-revenue  method to the  units-of-production  method  as
described in Note 4 to the Partnership's financial statements.  This change
in  depletion  method was applied as a cumulative effect  of  a  change  in
accounting principle effective as of January 1, 2002.

Principal Products, Marketing and Distribution
The  Partnership has acquired and holds royalty, overriding royalty and net
profit  interests in oil and gas properties located in Arkansas, New Mexico
and  Texas.   All  activities  of  the  Partnership  are  confined  to  the
continental United States.  All oil and gas produced from these  properties
is sold to unrelated third parties in the oil and gas business.

The  revenues  generated from the Partnership's oil and gas activities  are
dependent upon the current market for oil and gas.  The prices received  by
the Partnership for its oil and gas production depend upon numerous factors
beyond   the   Partnership's  control,  including  competition,   economic,
political  and regulatory developments and competitive energy sources,  and
make it particularly difficult to estimate future prices of oil and natural
gas.



<PAGE>

Following  is a table of the ratios of revenues received from oil  and  gas
production for the last three years:

            Oil       Gas
            ----      ----
  2003      67%       33%
  2002      71%       29%
  2001      66%       34%

As  the table indicates, the majority of the Partnership's revenue is  from
its   oil  production;  therefore,  Partnership  revenues  will  be  highly
dependent upon the future prices and demands for oil.

Seasonality of Business
Although  the  demand for natural gas can be effected by seasonality,  with
higher  demand  in the colder winter months and in very hot summer  months,
the  Partnership has not experienced material price and volume changes  due
to  seasonality  and has been able to sell all of its natural  gas,  either
through  contracts  in place or on the spot market at the  then  prevailing
spot market price.

Customer Dependence
No  material portion of the Partnership's business is dependent on a single
purchaser,  or a very few purchasers, where the loss of one  would  have  a
material adverse impact on the Partnership.  Four purchasers accounted  for
80%  of the Partnership's total oil and gas production during 2003:  Plains
Marketing LP for 32%, Exxon Company for 21%, Duke Energy Field Services  LP
for  17% and ConocoPhillips Company for 10%.  Contracts for 2003 with these
major  purchasers cover time periods ranging from month-to-month  contracts
up  to  the life of the lease contract periods.  Prices received from these
major  purchasers ranged from a low of $28.16 per Bbl to a high  of  $29.66
per  Bbl  and  a  low of $3.96 per mcf to a high of $4.34 per  mcf.   Three
purchasers  accounted  for  68%  of the Partnership's  total  oil  and  gas
production during 2002: Plains Marketing LP for 31%, Exxon Company USA  for
23%  and Duke Energy Field Services for 14%.  Contracts for 2002 with these
major  purchasers cover time periods ranging from month-to-month  contracts
up  to  the life of the lease contract periods.  Prices received from these
major  purchasers ranged from a low of $22.64 per Bbl to a high  of  $23.06
per  Bbl  and  $2.59 per mcf.  Four purchasers accounted  for  67%  of  the
Partnership's  total oil and gas production during 2001:  Plains  Marketing
LP  for 29%, Duke Energy Field Services for 17%, Mobil Corporation for  11%
and  Exxon  Company  USA  for  10%. Contracts for  2001  with  these  major
purchasers cover time periods ranging from month-to-month contracts  up  to
the  life of the lease contract periods.  Prices received from these  major
purchasers ranged from a low of $26.83 per Bbl to a high of $27.55 per  Bbl
and  $3.81  per  mcf.   All  purchasers of the Partnership's  oil  and  gas
production  are  unrelated  third parties.   In  the  event  any  of  these
purchasers were to discontinue purchasing the Partnership's production, the
Managing General Partner believes that a substitute purchaser or purchasers
could be located without undue delay.  No other purchaser accounted for  an
amount  equal to or greater than 10% of the Partnership's sales of oil  and
gas production.

Competition
Because  the  Partnership has utilized all of its funds available  for  the
acquisition  of net profits or royalty interests in producing oil  and  gas
properties,  it  is  not  subject to competition from  other  oil  and  gas
property purchasers.  See Item 2, Properties.

Factors  that  may  adversely  affect the  Partnership  include  delays  in
completing  arrangements  for  the sale of production,  availability  of  a
market for production, rising operating costs of producing oil and gas  and
complying  with  applicable  water  and  air  pollution  control  statutes,
increasing  costs  and  difficulties of transportation,  and  marketing  of
competitive  fuels.   Moreover, domestic oil  and  gas  must  compete  with
imported oil and gas and with coal, atomic energy, hydroelectric power  and
other forms of energy.


<PAGE>
Regulation

Oil  and Gas Production - The production and sale of oil and gas is subject
to  federal and state governmental regulation in several respects, such  as
existing price controls on natural gas and possible price controls on crude
oil,  regulation of oil and gas production by state and local  governmental
agencies, pollution and environmental controls and various other direct and
indirect   regulation.    Many  jurisdictions  have  periodically   imposed
limitations on oil and gas production by restricting the rate of  flow  for
oil  and  gas wells below their actual capacity to produce and by  imposing
acreage limitations for the drilling of wells.  The federal government  has
the  power  to  permit increases in the amount of oil imported  from  other
countries and to impose pollution control measures.  Various aspects of the
Partnership's  oil  and  gas  activities are  regulated  by  administrative
agencies under statutory provisions of the states where such activities are
conducted  and by certain agencies of the federal government for operations
on  Federal  leases.   The regulatory burden on the oil  and  gas  industry
increases  the  Partnership's  cost of doing business,  and,  consequently,
affects its profitability.

Regulation  of  Sales  and Transportation of Natural  Gas.   Our  sales  of
natural   gas  are  affected  by  the  availability,  terms  and  cost   of
transportation.  The price and terms for access to pipeline  transportation
are  subject  to  extensive  regulation. In  recent  years,  the  FERC  has
undertaken  various initiatives to increase competition within the  natural
gas industry. As a result of initiatives like FERC Order No. 636, issued in
April  1992, the interstate natural gas transportation and marketing system
has   been  substantially  restructured  to  remove  various  barriers  and
practices  that  historically  limited non-pipeline  natural  gas  sellers,
including  producers, from effectively competing with interstate  pipelines
for  sales  to  local  distribution  companies  and  large  industrial  and
commercial  customers. The most significant provisions  of  Order  No.  636
require   that   interstate  pipelines  provide  firm   and   interruptible
transportation  service  on an open access basis  that  is  equal  for  all
natural  gas supplies. In many instances, the results of Order No. 636  and
related  initiatives  have been to substantially reduce  or  eliminate  the
interstate  pipelines' traditional role as wholesalers of  natural  gas  in
favor  of  providing  only storage and transportation services.  While  the
United  States  Court  of  Appeals upheld most of Order  No.  636,  certain
related  FERC  orders,  including  the  individual  pipeline  restructuring
proceedings,  are still subject to judicial review and may be  reversed  or
remanded in whole or in part. While the outcome of these proceedings cannot
be  predicted  with certainty, we do not believe that we will  be  affected
materially differently than its competitors.

The FERC has also announced several important transportation-related policy
statements and proposed rule changes, including a statement of policy and a
request  for  comments concerning alternatives to its traditional  cost-of-
service rate making methodology to establish the rates interstate pipelines
may  charge  for their services. A number of pipelines have  obtained  FERC
authorization  to  charge  negotiated rates as  one  such  alternative.  In
February  1997, the FERC announced a broad inquiry into issues  facing  the
natural  gas  industry to assist the FERC in establishing regulatory  goals
and  priorities in the post-Order No. 636 environment. Similarly, the Texas
Railroad Commission has been reviewing changes to its regulations governing
transportation and gathering services provided by intrastate pipelines  and
gatherers.  While the changes being considered by these federal  and  state
regulators  would affect us only indirectly, they are intended  to  further
enhance  competition in natural gas markets. We cannot predict what further
action the FERC or state regulators will take on these matters, however, we
do  not  believe  that it will be affected by any action  taken  materially
differently than other natural gas producers with which it competes.

Additional  proposals  and proceedings that might affect  the  natural  gas
industry are pending before Congress, the FERC, state commissions  and  the
courts.  The  natural  gas  industry historically  has  been  very  heavily
regulated;  therefore,  there  is  no assurance  that  the  less  stringent
regulatory  approach  recently  pursued  by  the  FERC  and  Congress  will
continue.

Oil Price Controls and Transportation Rates. Sales of crude oil, condensate
and  gas  liquids by us are not currently regulated and are made at  market
prices.  The  price  we  receive from the sale of  these  products  may  be
affected by the cost of transporting the products to market.

<PAGE>
Environmental  and  Health Controls.  Extensive federal,  state  and  local
regulatory and common laws regulating the discharge of materials  into  the
environment  or  otherwise relating to the protection  of  the  environment
affect   our   oil  and  natural  gas  operations.  Numerous   governmental
departments issue rules and regulations to implement and enforce such laws,
which  are  often  difficult  and costly to comply  with  and  which  carry
substantial  civil and even criminal penalties for failure to comply.  Some
laws, rules and regulations relating to protection of the environment  may,
in   certain  circumstances,  impose  strict  liability  for  environmental
contamination,  rendering  a person liable for  environmental  damages  and
cleanup  costs without regard to negligence or fault on the  part  of  such
person. Other laws, rules and regulations may restrict the rate of oil  and
natural  gas production below the rate that would otherwise exist  or  even
prohibit  exploration  and production activities  in  sensitive  areas.  In
addition,  state  laws often require various forms of  remedial  action  to
prevent  pollution,  such  as  closure of inactive  pits  and  plugging  of
abandoned wells. The regulatory burden on the oil and natural gas  industry
increases  our  cost  of  doing  business  and  consequently  affects   our
profitability.  We  believe  that  we are in  substantial  compliance  with
current  applicable environmental laws and regulations and  that  continued
compliance  with  existing requirements will not have  a  material  adverse
impact on our operations. However, environmental laws and regulations  have
been subject to frequent changes over the years, and the imposition of more
stringent  requirements  could  have a material  adverse  effect  upon  our
capital  expenditures,  earnings  or competitive  position.   Additionally,
given  the  intense litigation environment in the United States,  a  threat
exists  of  lawsuits  alleging personal injury  and  property  damage  from
environmental  contamination  alleged  to  be  created  by  us  or  related
entities.   Potential  liability  in such lawsuits  can  include  not  only
compensatory, but substantial punitive damages as well.  We are  not  aware
of any such suits currently pending or threatened.

The  Comprehensive Environmental Response, Compensation and  Liability  Act
("CERCLA"),  also known as the "Superfund" law, imposes liability,  without
regard  to  fault on certain classes of persons that are considered  to  be
responsible   for  the  release  of  a  "hazardous  substance"   into   the
environment. These persons include the current or former owner or  operator
of the disposal site or sites where the release occurred and companies that
disposed or arranged for the disposal of hazardous substances. Under CERCLA
such persons may be subject to joint and several liability for the costs of
investigating and cleaning up hazardous substances that have been  released
into the environment, for damages to natural resources and for the costs of
certain  health  studies.  In  addition,  companies  that  incur  liability
frequently also confront third party claims because it is not uncommon  for
neighboring landowners and other third parties to file claims for  personal
injury  and  property  damage allegedly caused by hazardous  substances  or
other  pollutants  released  into the environment  from  a  polluted  site.
Potential  liability also exists under CERCLA for natural resource  damage.
A  Natural  Resource Damage Action (NRDA) could result in  liability  being
assessed for restoration to natural resources.

The  Federal Oil Pollution Act of 1990 ("OPA") regulates the release of oil
into  water  or  other areas designated by the statute.   A  release  could
result  in  our  being  held responsible for the cost  of  remediating  the
release, OPA specified damages and natural resource damages.  The extent of
such liability could be extensive.   A release of oil in harmful quantities
or other materials into water or other specified areas could also result in
our  being held responsible under the Clean Water Act ("CWA") for the costs
of remediation, and any civil and criminal fines and penalties.

The   Federal  Solid  Waste  Disposal  Act,  as  amended  by  the  Resource
Conservation  and Recovery Act of 1976 ("RCRA"), regulates the  generation,
transportation,  storage, treatment and disposal  of  solid  and  hazardous
wastes and can require cleanup of abandoned hazardous waste disposal  sites
as  well  as  waste management areas operating facilities.  RCRA  currently
excludes drilling fluids, produced waters and other wastes associated  with
the  exploration,  development or production of oil and  natural  gas  from
regulation  as  "hazardous waste." Disposal of such non-hazardous  oil  and
natural  gas  exploration, development and production  wastes  usually  are
regulated  by state law. Other wastes handled at exploration and production
sites  or used in the course of providing well services may not fall within
this  exclusion.  Moreover,  stricter  standards  for  waste  handling  and
disposal may be imposed on the oil and natural gas industry in the  future.
From time to time legislation is proposed in Congress that would revoke  or
alter  the  current  exclusion of exploration, development  and  production
wastes  from  the RCRA definition of "hazardous wastes" thereby potentially
subjecting  such  wastes to more stringent handling, disposal  and  cleanup
requirements. If such legislation were enacted it could have a  significant
impact  on the operating costs of Southwest and Sierra, as well as the  oil
and natural gas industry and well servicing industry in general. The impact
of  future  revisions  to  environmental laws  and  regulations  cannot  be
predicted.  In addition, if our operations were to trigger regulation under
RCRA,  we could be required to satisfy certain financial criteria to ensure
financial  ability  to comply with RCRA regulations.   Proof  of  financial
responsibility  could  be required in the form of  dedicated  trust  funds,
irrevocable letters of credit, posting of bonds, etc.

<PAGE>
The Federal Clean Water Act ("CWA") contains provisions that may result  in
the imposition of certain water pollution control requirements with respect
to water releases from our operations.  We may be required to incur certain
capital  expenditures in the next several years for water pollution control
equipment  in connection with obtaining and maintaining National  Pollutant
Discharge  Elimination Systems ("NPDES") permits.  However, we believe  our
operations  will  not  be  materially  adversely  affected  by   any   such
requirements,  and  the  requirements are  not  expected  to  be  any  more
burdensome to us than to other similarly situated companies involved in oil
and  natural  gas exploration and production activities or  well  surfacing
activities.

Our  operations are also subject to the federal Clean Air Act  ("CAA")  and
comparable state and local requirements. Amendments to the CAA were adopted
in 1990 and contain provisions that may result in the gradual imposition of
certain  pollution control requirements with respect to air emissions  from
our operations. We may be required to incur certain capital expenditures in
the  next  several years for air pollution control equipment in  connection
with  obtaining  and maintaining operating permits and  approvals  for  air
emissions.  However,  we  believe our operations  will  not  be  materially
adversely affected by any such requirements, and the requirements  are  not
expected  to be any more burdensome to us than to other similarly  situated
companies  involved  in  oil  and natural gas  exploration  and  production
activities or well servicing activities.

We  maintain  insurance against "sudden and accidental" occurrences,  which
may  cover  some, but not all, of the environmental risks described  above.
Most  significantly,  the insurance we maintain will not  cover  the  risks
described above which occur over a sustained period of time. Further, there
can  be  no assurance that such insurance will continue to be available  to
cover  all  such costs or that such insurance will be available at  premium
levels  that  justify its purchase.  The occurrence of a significant  event
not  fully  insured  or indemnified against could have a  material  adverse
effect on our financial condition and operations.

Limited   partners  should  be  aware  that  the  assessment  of  liability
associated with environmental liabilities is not always correlated  to  the
value of a particular project.  Accordingly, liability associated with  the
environment under local, state, or federal regulations, particularly  clean
ups  under CERCLA, can exceed the value of our investment in the associated
site.

Regulation  of  Oil  and  Natural  Gas  Exploration  and  Production.   Our
exploration  and  production operations are subject  to  various  types  of
regulation  at  the  federal,  state and local  levels.   Such  regulations
include  requiring  permits and drilling bonds for the drilling  of  wells,
regulating the location of wells, the method of drilling and casing  wells,
and  the  surface  use and restoration of properties upon which  wells  are
drilled.    Many  states  also  have  statutes  or  regulations  addressing
conservation matters, including provisions for the utilization  or  pooling
of  oil  and natural gas properties, the establishment of maximum rates  of
production  from oil and natural gas wells and the regulation  of  spacing,
plugging and abandonment of such wells.  Some state statutes limit the rate
at which oil and natural gas can be produced from our properties.

Partnership Employees
The  Partnership has no employees; however the Managing General Partner has
a  staff of geologists, engineers, accountants, landmen and clerical  staff
who  engage in Partnership activities and operations and perform additional
services  for  the  Partnership as needed.  In  addition  to  the  Managing
General  Partner's  staff, the Partnership engages independent  consultants
such  as petroleum engineers and geologists as needed.  As of December  31,
2003,  there were 81 individuals directly employed by the Managing  General
Partner in various capacities.

Item 2.   Properties

In  determining whether an interest in a particular producing property  was
to  be  acquired, the Managing General Partner considered such criteria  as
estimated  oil  and  gas reserves, estimated cash flow  from  the  sale  of
production,  present  and  future prices of oil  and  gas,  the  extent  of
undeveloped  and  unproved reserves, the potential for secondary,  tertiary
and other enhanced recovery projects and the availability of markets.

<PAGE>
As  of December 31, 2003, the Partnership possessed an interest in oil  and
gas  properties  located  in  Columbia County of  Arkansas;  Eddy  and  Lea
Counties  of  New  Mexico;  and  Crane,  Duval,  Howard,  Midland,   Upton,
Schleicher,  Scurry,  Ward, Winkler and Yoakum Counties  of  Texas.   These
properties  consist  of various interests in approximately  216  wells  and
units.

Due  to  the  Partnership's  objective of  maintaining  current  operations
without engaging in the drilling of any developmental or exploratory wells,
or additional acquisitions of producing properties, there have not been any
significant changes in properties during 2003, 2002 and 2001.

There  were  no  property sales during 2003.  There was one  property  sold
during 2002 for $37,500.  There were no property sales during 2001.

Significant Properties
The  following  table  reflects the significant  properties  in  which  the
Partnership has an interest:

                        Date
                      Purchased     No. of              Proved
                                                       Reserves
                                                          *
Name and Location   and Interest    Wells      Oil       Gas
                                              (bbls)    (mcf)
-----------------   ------------    -----    --------  --------
                                                --        -
McElroy Ranch        8/98 at 17%      1       1,000    262,000
Upton      County,   net profits      1      1,000(1)  262,000(
Texas                 interest                            1)

NE Vacuum ABO        9/91 at 25%      13     101,000    66,000
Acquisition          to 50% net       7      74,000(1  38,000(1
                                                )         )
Lea   County,  New     profits
Mexico                interest

Southwest            1/92 at 8%       4       19,000    90,000
Royalties
Acquisition
Midland  and  Ward   to 50% net       4      19,000(1  90,000(1
County, Texas                                   )         )
And  Eddy  County,     profits
New Mexico            interest

(1)Amounts  represent  proved developed reserves from  currently  producing
zones.

*Ryder Scott Company, L.P. prepared the reserve and present value data  for
the  Partnership's existing properties as of January 1, 2004.  The  reserve
estimates  were  made  in  accordance with guidelines  established  by  the
Securities and Exchange Commission pursuant to Rule 4-10(a) of Regulation S-
X.   Such guidelines require oil and gas reserve reports be prepared  under
existing economic and operating conditions with no provisions for price and
cost escalation except by contractual arrangements.

Oil  price  adjustments were made in the individual evaluations to  reflect
oil quality, gathering and transportation costs. The results of the reserve
report as of January 1, 2004 are an average price of $31.39 per barrel.

Gas  price  adjustments were made in the individual evaluations to  reflect
BTU  content,  gathering and transportation costs and  gas  processing  and
shrinkage.  The results of the reserve report as of January 1, 2004 are  an
average price of $5.34 per Mcf.

<PAGE>
As  also discussed in Part II, Item 7, Management's Discussion and Analysis
of  Financial Condition and Results of Operations, oil and gas prices  were
subject to frequent changes in 2003.

The  evaluation  of  oil and gas properties is not  an  exact  science  and
inevitably involves a significant degree of uncertainty, particularly  with
respect to the quantity of oil or gas that any given property is capable of
producing.   Estimates  of  oil and gas reserves  are  based  on  available
geological and engineering data, the extent and quality of which  may  vary
in  each  case  and,  in  certain instances, may prove  to  be  inaccurate.
Consequently,  properties may be depleted more rapidly than the  geological
and engineering data have indicated.

Unanticipated  depletion, if it occurs, will result in lower reserves  than
previously  estimated; thus an ultimately lower return for the Partnership.
Basic  changes in past reserve estimates occur annually.  As  new  data  is
gathered  during the subsequent year, the engineer must revise his  earlier
estimates.  A year of new information, which is pertinent to the estimation
of  future  recoverable volumes, is available during  the  subsequent  year
evaluation.   In applying the industry audit standards and procedures,  the
new data may cause the previous estimates to be revised.  This revision may
increase  or decrease the earlier estimated volumes.  Pertinent information
gathered  during the year may include actual production and decline  rates,
production  from  offset  wells  drilled to the  same  geologic  formation,
increased or decreased water production, workovers, and changes in  lifting
costs,  among  others.  Accordingly, reserve estimates are often  different
from the quantities of oil and gas that are ultimately recovered.

The  Partnership has reserves, which are classified as proved developed and
proved  undeveloped.   All  of  the proved reserves  are  included  in  the
engineering reports, which evaluate the Partnership's present reserves.

Because  the  Partnership  does  not engage  in  drilling  activities,  the
development of proved undeveloped reserves is conducted pursuant  to  farm-
out  arrangements  with  the Managing General Partner  or  unrelated  third
parties.  Generally, the Partnership retains a carried interest such as  an
overriding royalty interest under the terms of a farm-out.  The Partnership
or  the owners of properties in which the Partnership owns an interest  can
engage  in  workover  projects  or  supplementary  recovery  projects,  for
example,  to  extract  behind the pipe reserves.   See  Part  II,  Item  7,
Management's Discussion and Analysis of Financial Condition and Results  of
Operations.

Item 3.   Legal Proceedings

There are no material pending legal proceedings to which the Partnership is
a party.

Item 4.   Submission of Matters to a Vote of Security Holders

No  matter  was submitted to a vote of security holders during  the  fourth
quarter of 2003 through the solicitation of proxies or otherwise.

<PAGE>
                                 Part II


Item 5.   Market  for  the Registrant's Common Equity, Related  Stockholder
          Matters and Issuer Purchases of Equity Securities

Market Information
Limited  partnership interests, or units, in the Partnership were initially
offered and sold for a price of $500.  Limited partner units are not traded
on  any  exchange  and there is no public or organized trading  market  for
them.  The Managing General Partner has become aware of certain limited and
sporadic transfers of units between limited partners and third parties, but
has no verifiable information regarding the prices at which such units have
been  transferred.   Further,  a transferee may  not  become  a  substitute
limited partner without the consent of the Managing General Partner.

Managing  General  Partner  has  the  right,  but  not  the  obligation  in
accordance with the obligations set forth in the partnership agreement,  to
purchase limited partnership units should an investor desire to sell.   The
value  of  the  unit is determined by adding the sum of (1) current  assets
less  liabilities  and  (2) the present value of the  future  net  revenues
attributable to proved reserves and by discounting the future net  revenues
at  a rate not in excess of the prime rate charged by NationsBank, N.A.  of
Midland, Texas plus one percent (1%), which value shall be further  reduced
by  a risk factor discount of no more than one-third (1/3) to be determined
by  the Managing General Partner in its sole and absolute discretion  under
the partnership agreement.

                   Issuer Purchases of Equity Securities
                                                   Maximum
                                       Total     Number (or
                                      Number
                                     of Units    Approximat
                                                      e
                                     Purchased    Value) of
                                        as          Units
                                      Part of     that May
                                     Publicly      Yet Be
               Total                 Announced    Purchased
              Number
             of Units     Average    Plans or     Under the
                           Price                    Plans
Period(1)    Purchased   Paid Per    Programs        or
                           Unit                   Programs
October 1-
   31,
   2003         83      $  124.83        -           N/A
November 1-
   30,
   2003          -             -         -           N/A
December 1-
   31,
   2003          -             -         -           N/A
  TOTALS        83      $  124.83

(1)  In April and July 2003, the Managing General Partner purchased a total
of 525 limited partner units from limited partners at an average base price
of  $128.63  per  unit.   In  2002 and 2001, the Managing  General  Partner
purchased no limited partner units. The discretionary repurchases were made
based upon the partnership agreement.

Number of Limited Partner Interest Holders
As of December 31, 2003, there were 580 holders of limited partner units in
the Partnership.

Distributions
Pursuant to Article III, Section 3.05 of the Partnership's Certificate  and
Agreement  of  Limited Partnership "Net Cash Flow" is  distributed  to  the
partners  on  a quarterly basis.  "Net Cash Flow" is defined as  "the  cash
generated  by  the  Partnership's investments  in  producing  oil  and  gas
properties,  less  (i)  General and Administrative  Costs,  (ii)  Operating
Costs,  and  (iii) any reserves necessary to meet current  and  anticipated
needs  of  the  Partnership, as determined in the sole  discretion  of  the
Managing General Partner."

During  2003,  distributions  were made totaling  $170,137,  with  $153,123
distributed  to  the limited partners and $17,014 to the general  partners.
For  the  year ended December 31, 2003, distributions of $13.69 per limited
partner   unit   were  made,  based  upon  11,181  limited  partner   units
outstanding.  During 2002, distributions were made totaling $176,254,  with
$158,629  distributed to the limited partners and $17,625  to  the  general
partners.   For the year ended December 31, 2002, distributions  of  $14.19
per limited partner unit were made, based upon 11,181 limited partner units
outstanding.  During 2001, distributions were made totaling $401,796,  with
$361,616  distributed to the limited partners and $40,180  to  the  general
partners.   For the year ended December 31, 2001, distributions  of  $32.34
per limited partner unit were made, based upon 11,181 limited partner units
outstanding.

<PAGE>
Item 6.   Selected Financial Data

The  following  selected financial data for the years  ended  December  31,
2003,  2002,  2001,  2000 and 1999 should be read in conjunction  with  the
financial statements included in Item 8:

                                      Years ended December 31,
                           -----------------------------------------------
                                            ------------
                             2003      2002     2001      2000      1999
                             ----      ----     ----      ----      ----
Revenues                $  175,452   257,551  384,526   437,328   195,248

Net    income   before
cumulative
  effect of accounting     52,270    153,258  251,639   335,842   89,273
changes

Net income (loss)          (39,154)  98,258   251,639   335,842   89,273

Partners' share
 of net income (loss):

General partners           (1,616)   17,926   30,664    36,084    11,827

Limited partners           (37,538)  80,332   220,975   299,758   77,446

Limited partners'  net
income per unit
   before   cumulative
effect of
 accounting changes          4.00
                                     12.10    19.76     26.81     6.93

Limited partners'
 net income (loss) per     (3.36)
unit                                 7.18     19.76     26.81     6.93

Limited partners'
 cash distributions
 per unit                   13.69
                                     14.19    32.34     22.28     12.92

Total assets            $  399,840   402,910  480,943   631,064   572,001



<PAGE>
Item 7.   Management's  Discussion and Analysis of Financial Condition  and
          Results of Operations

General
The  Partnership was formed to acquire non-operating interests in producing
oil  and  gas  properties, to produce and market crude oil and natural  gas
produced  from  such  properties and to distribute any  net  proceeds  from
operations  to  the  general  and  limited  partners.   Net  revenues  from
producing  oil  and  gas  properties are not reinvested  in  other  revenue
producing  assets except to the extent that producing facilities and  wells
are  reworked  or  where  methods are employed to improve  or  enable  more
efficient  recovery  of oil and gas reserves.  The  economic  life  of  the
Partnership thus depends on the period over which the Partnership's oil and
gas reserves are economically recoverable.

Increases   or   decreases   in  Partnership   revenues   and,   therefore,
distributions  to partners will depend primarily on changes in  the  prices
received  for  production,  changes in volumes of  production  sold,  lease
operating  expenses, enhanced recovery projects, offset drilling activities
pursuant  to  farm-out arrangements and on the depletion of  wells.   Since
wells  deplete over time, production can generally be expected  to  decline
from year to year.

Well  operating costs and general and administrative costs usually decrease
with   production   declines;  however,  these  costs  may   not   decrease
proportionately.   Net  income available for distribution  to  the  limited
partners  is  therefore expected to decline in later years based  on  these
factors.

Based  on current conditions, management anticipates performing no drilling
projects  and  workovers during the year 2004 to enhance  production.   The
partnership  will  most  likely  continue  to  experience  the   historical
production  decline, which has approximated 8% per year.   Accordingly,  if
commodity prices remain unchanged, the Partnership expects future  earnings
to decline due to anticipated production declines.

Critical Accounting Policies
Full cost ceiling calculations The Partnership follows the full cost method
of  accounting  for  its  oil and gas properties.   The  full  cost  method
subjects  companies to quarterly calculations of a "ceiling", or limitation
on  the  amount of properties that can be capitalized on the balance sheet.
If  the  Partnership's capitalized costs are in excess  of  the  calculated
ceiling, the excess must be written off as an expense.

The  Partnership's discounted present value of its proved oil  and  natural
gas  reserves  is  a  major  component  of  the  ceiling  calculation,  and
represents  the  component  that requires the  most  subjective  judgments.
Estimates  of  reserves are forecasts based on engineering data,  projected
future  rates  of  production and the timing of future  expenditures.   The
process  of  estimating oil and natural gas reserves  requires  substantial
judgment,  resulting  in  imprecise determinations,  particularly  for  new
discoveries.   Different reserve engineers may make different estimates  of
reserve  quantities  based  on the same data.   The  Partnership's  reserve
estimates are prepared by outside consultants.

The  passage  of  time  provides  more  qualitative  information  regarding
estimates of reserves, and revisions are made to prior estimates to reflect
updated  information.   However,  there  can  be  no  assurance  that  more
significant  revisions  will not be necessary in  the  future.   If  future
significant  revisions  are  necessary  that  reduce  previously  estimated
reserve quantities, it could result in a full cost property writedown.   In
addition to the impact of these estimates of proved reserves on calculation
of  the  ceiling,  estimates  of proved reserves  are  also  a  significant
component of the calculation of DD&A.

While  the quantities of proved reserves require substantial judgment,  the
associated prices of oil and natural gas reserves that are included in  the
discounted  present  value of the reserves do not  require  judgment.   The
ceiling calculation dictates that prices and costs in effect as of the last
day  of  the  period are generally held constant indefinitely. Because  the
ceiling  calculation dictates that prices in effect as of the last  day  of
the  applicable quarter are held constant indefinitely, the resulting value
is  not indicative of the true fair value of the reserves.  Oil and natural
gas  prices have historically been cyclical and, on any particular  day  at
the  end of a quarter, can be either substantially higher or lower than the
Partnership's  long-term price forecast that is a barometer for  true  fair
value.

In  2002,  the  Partnership changed methods of accounting for depletion  of
capitalized  costs  from  the  units-of-revenue  method  to  the  units-of-
production method.  The newly adopted accounting principle is preferable in
the  circumstances  because the units-of-production  method  results  in  a
better  matching of the costs of oil and gas production against the related
revenue received in periods of volatile prices for production as have  been
experienced  in  recent  periods.   Additionally,  the  units-of-production
method is the predominant method used by full cost companies in the oil and
gas  industry,  accordingly, the change improves the comparability  of  the
Partnership's financial statements with its peer group.
<PAGE>
Results of Operations

A.  General Comparison of the Years Ended December 31, 2003 and 2002

The  following  table  provides certain information  regarding  performance
factors for the years ended December 31, 2003 and 2002:

                                Year Ended      Percenta
                                                   ge
                               December 31,     Increase
                              2003      2002    (Decreas
                                                   e)
                              ----      ----    --------
                                                   -
Average price per        $    29.85               24%
barrel of oil                         24.05
Average price per mcf    $     4.57               63%
of gas                                2.81
Oil production in           19,300    19,200       1%
barrels
Gas production in mcf       63,200    68,000      (7%)
Income from net profits  $  167,490   253,281    (34%)
interests
Partnership              $  170,137   176,254     (4%)
distributions
Limited partner          $  153,123   158,629     (4%)
distributions
Per unit distribution    $    13.69               (4%)
to limited partners                   14.19

Number of limited           11,181    11,181
partner units

Revenues

The  Partnership's income from net profits interests decreased to  $167,490
from $253,281 for the years ended December 31, 2003 and 2002, respectively,
a  decrease of 34%.  The principal factors affecting the comparison of  the
years ended December 31, 2003 and 2002 are as follows:

1.  The  average  price  for a barrel of oil received  by  the  Partnership
    increased  during the year ended December 31, 2003 as compared  to  the
    year ended December 31, 2002 by 24%, or $5.80 per barrel, resulting  in
    an  increase  of  approximately $111,900 in  income  from  net  profits
    interests.  Oil sales represented 67% of total oil and gas sales during
    the  year  ended December 31, 2003 as compared to 71% during  the  year
    ended December 31, 2002.

    The  average  price  for  an  mcf of gas received  by  the  Partnership
    increased during the same period by 63%, or $1.76 per mcf, resulting in
    an  increase  of  approximately $111,200 in  income  from  net  profits
    interests.

    The  total  increase in income from net profits interests  due  to  the
    change  in prices received from oil and gas production is approximately
    $223,100.  The market price for oil and gas has been extremely volatile
    over  the  past  decade  and management expects  a  certain  amount  of
    volatility to continue in the foreseeable future.

<PAGE>

2.  Oil  production increased approximately 100 barrels or  1%  during  the
    year ended December 31, 2003 as compared to the year ended December 31,
    2002,  resulting in an increase of approximately $2,400 in income  from
    net profits interests.

    Gas  production decreased approximately 4,800 mcf or 7% during the same
    period, resulting in a decrease of approximately $13,500 in income from
    net profits interests.

    The  net total decrease in income from net profits interests due to the
    change in production is approximately $11,100.

3.  Other  income  in  the  amount of $7,605 for 2003 primarily  represents
    litigation  settlement income from a class action  lawsuit,  where  two
    purchasers  were  underpaying  for certain  types  of  oil  in  certain
    locations for the time periods of 1988-1998.

4.  Lease  operating  costs  and  production  taxes  were  75%  higher,  or
    approximately $298,000 more during the year ended December 31, 2003  as
    compared  to the year ended December 31, 2002.  The increase  in  lease
    operating  cost were due to repairs performed on two wells and  to  the
    increase in production taxes due to the increased oil and gas commodity
    prices.

Costs and Expenses

Total  costs and expenses increased to $123,182 from $104,293 for the years
ended  December 31, 2003 and 2002, respectively, an increase of  18%.   The
increase  is  the  result of the addition of accretion expense  and  higher
general  and  administrative  costs, partially  offset  by  a  decrease  in
depletion expense.

1.  General and administrative costs consists of independent accounting and
    engineering  fees,  computer services, postage,  and  Managing  General
    Partner personnel costs.  General and administrative costs increased 8%
    or  approximately  $6,600 during the year ended December  31,  2003  as
    compared to the year ended December 31, 2002.

2.  Depletion expense decreased to $23,000 for the year ended December  31,
    2003  from  $26,000  for the same period in 2002.   This  represents  a
    decrease  of 12%.  The contributing factor to the decrease in depletion
    expense  is  in relation to the BOE depletion rate for the  year  ended
    December 31, 2003, which was $.77 applied to 29,833 BOE as compared  to
    $.85 applied to 30,533 BOE for the same period.

Cumulative effect of change in accounting principle - SFAS No. 143
On  January  1,  2003,  the  Partnership  adopted  Statement  of  Financial
Accounting  Standards No. 143, Accounting for Asset Retirement  Obligations
("SFAS  No. 143").  Adoption of SFAS No. 143 is required for all  companies
with fiscal years beginning after June 15, 2002.  The new standard requires
the Partnership to recognize a liability for the present value of all legal
obligations  associated with the retirement of tangible  long-lived  assets
and to capitalize an equal amount as a cost of the asset and depreciate the
additional cost over the estimated useful life of the asset.  On January 1,
2003,  the  Partnership  recorded  additional  costs,  net  of  accumulated
depreciation,  of  approximately  $101,341,  a  long  term   liability   of
approximately  $192,765  and  a  loss  of  approximately  $91,424  for  the
cumulative  effect  on depreciation of the additional costs  and  accretion
expense  on the liability related to expected abandonment costs of its  oil
and  natural  gas  producing properties.  At December 31, 2003,  the  asset
retirement  obligation was $205,889, and the increase in the  balance  from
January 1, 2003 is due to accretion expense of $15,335 plus the addition of
a new well for $76, partially offset by the plug and abandonment of oil and
gas  properties, which decreased the asset retirement obligation by $2,287.
The pro forma amounts of the asset retirement obligation as of December 31,
2002,  2001  and 2000, were approximately $192,765, $178,577 and  $165,434,
respectively.   The  pro  forma amounts of the asset retirement  obligation
were  measured using information, assumptions and interest rates as of  the
adoption date of January 1, 2003.



<PAGE>


Results of Operations

B.  General Comparison of the Years Ended December 31, 2002 and 2001

The  following  table  provides certain information  regarding  performance
factors for the years ended December 31, 2002 and 2001:

                                Year Ended      Percenta
                                                   ge
                               December 31,     Increase
                              2002      2001    (Decreas
                                                   e)
                              ----      ----    --------
                                                   -
Average price per        $    24.05               (1%)
barrel of oil                         24.22
Average price per mcf    $     2.81              (22%)
of gas                                3.59
Oil production in           19,200    21,800     (12%)
barrels
Gas production in mcf       68,000    76,700     (11%)
Income from net profits  $  253,281   381,306    (34%)
interests
Partnership              $  176,254   401,796    (56%)
distributions
Limited partner          $  158,629   361,616    (56%)
distributions
Per unit distribution    $   14.19               (56%)
to limited partners                   32.34

Number of limited           11,181    11,181
partner units

Revenues

The  Partnership's income from net profits interests decreased to  $253,281
from $381,306 for the years ended December 31, 2002 and 2001, respectively,
a  decrease of 34%.  The principal factors affecting the comparison of  the
years ended December 31, 2002 and 2001 are as follows:

1.  The  average  price  for a barrel of oil received  by  the  Partnership
    decreased  during the year ended December 31, 2002 as compared  to  the
    year ended December 31, 2001 by 1%, or $.17 per barrel, resulting in  a
    decrease  of approximately $3,300 in income from net profits interests.
    Oil  sales represented 71% of total oil and gas sales during  the  year
    ended  December  31,  2002 as compared to 66%  during  the  year  ended
    December 31, 2001.

    The  average  price  for  an  mcf of gas received  by  the  Partnership
    decreased during the same period by 22%, or $.78 per mcf, resulting  in
    a  decrease  of  approximately  $53,000  in  income  from  net  profits
    interests.

    The  total  decrease in income from net profits interests  due  to  the
    change  in prices received from oil and gas production is approximately
    $56,300.   The market price for oil and gas has been extremely volatile
    over  the  past  decade  and management expects  a  certain  amount  of
    volatility to continue in the foreseeable future.

<PAGE>

2.  Oil  production decreased approximately 2,600 barrels or 12% during the
    year ended December 31, 2002 as compared to the year ended December 31,
    2001,  resulting in a decrease of approximately $63,000 in income  from
    net profits interests.

    Gas production decreased approximately 8,700 mcf or 11% during the same
    period, resulting in a decrease of approximately $31,200 in income from
    net profits interests.

    The  total  decrease in income from net profits interests  due  to  the
    change in production is approximately $94,200.

3.  Lease   operating  costs  and  production  taxes  were  5%  lower,   or
    approximately $22,200 less during the year ended December 31,  2002  as
    compared to the year ended December 31, 2001.

Costs and Expenses

Total  costs and expenses decreased to $104,293 from $132,887 for the years
ended  December 31, 2002 and 2001, respectively, a decrease  of  22%.   The
decrease is the result of lower depletion expense, partially offset  by  an
increase in general and administrative costs.

1.  General and administrative costs consists of independent accounting and
    engineering  fees,  computer services, postage,  and  Managing  General
    Partner personnel costs.  General and administrative costs increased 1%
    or  approximately  $400  during the year ended  December  31,  2002  as
    compared to the year ended December 31, 2001.

2.  Depletion expense decreased to $26,000 for the year ended December  31,
    2002  from  $55,000  for the same period in 2001.   This  represents  a
    decrease  of  53%.   In  the fourth quarter of  2002,  the  Partnership
    changed  methods of accounting for depletion of capitalized costs  from
    the  units-of-revenue  method to the units-of-production  method.   The
    newly  adopted  accounting principle is preferable in the circumstances
    because the units-of-production method results in a better matching  of
    the  costs  of  oil  and  gas production against  the  related  revenue
    received  in  periods of volatile prices for production  as  have  been
    experienced  in  recent periods.  Additionally, the units-of-production
    method is the predominant method used by full cost companies in the oil
    and gas industry, accordingly, the change improves the comparability of
    the Partnership's financial statements with its peer group.  The effect
    of  this  change  in method was to decrease 2002 depletion  expense  by
    $2,000  and  decrease 2002 net income by $53,000.  See Note  4  of  the
    notes to the Partnership's financial statements.

   The  major  factor  in  the decrease in depletion  expense  between  the
   comparative  periods was the increase in the price of oil and  gas  used
   to  determine the Partnership's reserves for January 1, 2003 as compared
   to  2002,  which provided more economically recoverable proved  reserves
   at  January 1, 2003 which caused the depletion rate per equivalent  unit
   produced  to  decline.  Also, as discussed above, the  total  equivalent
   units produced in 2002 declined from 2001.




<PAGE>


C.  Revenue and Distribution Comparison

Partnership net income (loss) for the years ended December 31,  2003,  2002
and  2001  was  $(39,154), $98,258 and $251,639, respectively.  Partnership
distributions  for the years ended December 31, 2003, 2002  and  2001  were
$170,137,  $176,254  and  $401,796, respectively.   These  differences  are
indicative  of the changes in oil and gas prices, production  and  property
sales.

The  sources  for  the  2003 distributions of $170,100  were  oil  and  gas
operations of approximately $116,900, with the balance from available  cash
on  hand  at  the  beginning  of the period.   The  sources  for  the  2002
distributions  of  $176,254  were oil and gas operations  of  approximately
$154,600 and the change in oil and gas properties of approximately $37,500,
resulting  in  excess  cash for contingencies or subsequent  distributions.
The  sources  for  the  2001 distributions of $401,796  were  oil  and  gas
operations of approximately $369,800, with the balance from available  cash
on hand at the beginning of the period.

Total  distributions during the year ended December 31, 2003 were  $170,137
of  which  $153,123 was distributed to the limited partners and $17,014  to
the general partners.  The per unit distribution to limited partners during
the  same  period was $13.69.  Total distributions during  the  year  ended
December  31, 2002 were $176,254 of which $158,629 was distributed  to  the
limited  partners  and  $17,625  to the general  partners.   The  per  unit
distribution to limited partners during the same period was $14.19.   Total
distributions  during  the year ended December 31, 2001  were  $401,796  of
which  $361,616 was distributed to the limited partners and $40,180 to  the
general partners.  The per unit distribution to limited partners during the
same period was $32.34.

Cumulative  cash distributions of $5,845,489 have been made to the  general
and  limited  partners as of December 31, 2003.  As of December  31,  2003,
$5,319,983 or $475.81 per limited partner unit has been distributed to  the
limited partners, representing a 95% return of capital contributed.

<PAGE>

Liquidity and Capital Resources

The  primary source of cash is from operations, the receipt of income  from
net profits interests in oil and gas properties.  The Partnership knows  of
no material change, nor does it anticipate any such change.

Cash flows provided by operating activities were approximately $116,900  in
2003 compared to $154,600 in 2002 and approximately $369,800 in 2001.

The  Partnership had no cash flows from investing activities  in  2003  and
2001.  Cash  flows  provided  by  investing activities  were  approximately
$37,500 in 2002.

Cash flows used in financing activities were approximately $169,800 in 2003
compared to $176,300 in 2002 and approximately $401,800 in 2001.  The  only
use in financing activities was the distributions to partners.

As  of  December  31,  2003, the Partnership had approximately  $61,900  in
working  capital.   The  Managing  General  Partner  knows  of  no  unusual
contractual  commitments.  Although the Partnership  held  many  long-lived
properties   at  inception,  because  of  the  restrictions   on   property
development  imposed by the partnership agreement, the  Partnership  cannot
develop   its   non  producing  properties,  if  any.   Without   continued
development,  the producing reserves continue to deplete.  Accordingly,  as
the  Partnership's properties have matured and depleted, the net cash flows
from  operations  for  the  Partnership has steadily  declined,  except  in
periods  of  substantially  increased commodity  pricing.   Maintenance  of
properties  and administrative expenses for the Partnership are  increasing
relative to production.  As the properties continue to deplete, maintenance
of  properties  and administrative costs as a percentage of production  are
expected to continue to increase.

Liquidity - Managing General Partner

As  of  December 31, 2003, the Managing General Partner is in violation  of
several covenants pertaining to their Amended and Restated Revolving Credit
Agreement  due  June  1, 2006 and their Senior Second Lien  Secured  Credit
Agreement  due  October  15,  2008.  Due to the  covenant  violations,  the
Managing  General  Partner is in default under their Amended  and  Restated
Revolving  Credit  Agreement  and the Senior  Second  Lien  Secured  Credit
Agreement,  and all amounts due under these agreements have been classified
as  a current liability on the Managing General Partner's balance sheet  at
December 31, 2003.  The significant working capital deficit and debt  being
in default at December 31, 2003, raise substantial doubt about the Managing
General Partner's ability to continue as a going concern.

Subsequent  to  December 31, 2003, the Board of Directors of  the  Managing
General  Partner announced its decision to explore a merger,  sale  of  the
stock  or  other transaction involving the Managing General  Partner.   The
Board  has  formed a Special Committee of independent directors to  oversee
the   sales  process.   The  Special  Committee  has  retained  independent
financial  and  legal advisors to work closely with the management  of  the
Managing General Partner to implement the sales process.  There can  be  no
assurance  that a sale of the Managing General Partner will be  consummated
or what terms, if consummated, the sale will be on.

Recent Accounting Pronouncements

The  EITF is considering two issues related to the reporting of oil and gas
mineral  rights.  Issue No. 03-O, "Whether Mineral Rights Are  Tangible  or
Intangible Assets," is whether or not mineral rights are intangible  assets
pursuant  to  SFAS  No.  141,  "Business  Combinations."  Issue  No.  03-S,
"Application of SFAS No. 142, Goodwill and Other Intangible Assets, to  Oil
and  Gas  Companies,"  is, if oil and gas drilling  rights  are  intangible
assets,  whether  those  assets  are  subject  to  the  classification  and
disclosure provisions of SFAS No. 142.  The Partnership classifies the cost
of oil and gas mineral rights as properties and equipment and believes that
this is consistent with oil and gas accounting and industry practice.   The
disclosures required by SFAS Nos. 141 and 142 would be made in the notes to
the  financial  statements. There would be no effect on  the  statement  of
income  or  cash  flows as the intangible assets related  to  oil  and  gas
mineral rights would continue to be amortized under the full cost method of
accounting.

Item 7A.  Quantitative and Qualitative Disclosures About Market Risk

The  Partnership  is  not a party to any derivative or embedded  derivative
instruments.

<PAGE>
Item 8.        Financial Statements and Supplementary Data

                      Index to Financial Statements

                                                                       Page

Independent Auditors' Report                                            22

Balance Sheets                                                          23

Statements of Operations                                                24

Statement of Changes in Partners' Equity                                25

Statements of Cash Flows                                                26

Notes to Financial Statements                                           28

<PAGE>









                       INDEPENDENT AUDITORS' REPORT

The Partners
Southwest Royalties Institutional
 Income Fund X-B, L.P.
 (A Delaware Limited Partnership):


We  have  audited  the  accompanying balance sheets of Southwest  Royalties
Institutional Income Fund X-B, L.P. (the "Partnership") as of December  31,
2003  and  2002,  and  the  related statements of  operations,  changes  in
partners'  equity and cash flows for each of the years in  the  three  year
period  ended  December  31,  2003.  These  financial  statements  are  the
responsibility of the Partnership's management.  Our responsibility  is  to
express an opinion on these financial statements based on our audits.

We  conducted  our  audits in accordance with auditing standards  generally
accepted in the United States of America.  Those standards require that  we
plan and perform the audit to obtain reasonable assurance about whether the
financial statements are free of material misstatement.  An audit  includes
examining, on a test basis, evidence supporting the amounts and disclosures
in  the  financial  statements.   An  audit  also  includes  assessing  the
accounting principles used and significant estimates made by management, as
well  as  evaluating  the  overall financial  statement  presentation.   We
believe that our audits provide a reasonable basis for our opinion.

In  our opinion, the financial statements referred to above present fairly,
in  all  material  respects, the financial position of Southwest  Royalties
Institutional Income Fund X-B, L.P. as of December 31, 2003  and  2002  and
the  results of its operations and its cash flows for each of the years  in
the three year period ended December 31, 2003 in conformity with accounting
principles generally accepted in the United States of America.

As discussed in Note 4 to the financial statements, the Partnership changed
its method of computing depletion in 2002.  Also, as discussed in Note 3 to
the  financial statements, the Partnership changed its method of accounting
for asset retirement obligations as of January 1, 2003.







                                                  KPMG LLP



Midland, Texas
March 19, 2004, except as to Note 9, which is as of May 3, 2004

<PAGE>
         Southwest Royalties Institutional Income Fund X-B, L.P.
                     (a Delaware limited partnership)
                              Balance Sheets
                        December 31, 2003 and 2002

                                   2003      2002
                                   ----      ----

Assets
---------

Current assets:
 Cash and cash equivalents    $  11,800    64,725
  Receivable  from  Managing     50,094    78,656
General Partner
                                 --------  --------
                                 -----     -----
   Total current assets          61,894    143,381
                                 --------  --------
                                 -----     -----
Oil  and  gas  properties  -
using the full-
 cost method of accounting       3,934,20  3,851,38
                                 3         2
       Less      accumulated
depreciation,
         depletion       and     3,596,25  3,591,85
amortization                     7         3
                                 --------  --------
                                 -----     -----
      Net   oil   and    gas     337,946   259,529
properties
                                 --------  --------
                                 -----     -----
                              $  399,840   402,910
                                 =======   =======

Liabilities  and   Partners'
Equity
----------------------------
----

Current     liability      -  $  332       -
distribution payable
                                 --------  --------
                                 -----     -----

Asset retirement obligation      205,889   -
                                 --------  --------
                                 -----     -----
Partners' equity:
 General partners                (60,160)  (41,530)
 Limited partners                253,779   444,440
                                 --------  --------
                                 -----     -----
   Total partners' equity        193,619   402,910
                                 --------  --------
                                 -----     -----
                              $  399,840   402,910
                                 =======   =======










                  The accompanying notes are an integral
                   part of these financial statements.

<PAGE>
         Southwest Royalties Institutional Income Fund X-B, L.P.
                     (a Delaware limited partnership)
                         Statements of Operations
               Years ended December 31, 2003, 2002 and 2001

                                     2003      2002      2001
                                     ----      ----      ----
Revenues
-------------
   Income   from  net  profits  $  167,490   253,281   381,306
interests
 Interest from operations          357       609       3,220
 Other                             7,605     3,661     -
                                   --------  --------  --------
                                   --        --        --
                                   175,452   257,551   384,526
                                   --------  --------  --------
                                   --        --        --
Expenses
------------
 General and administrative        84,847    78,293    77,887
 Accretion of asset retirement     15,335    -         -
obligation
  Depreciation, depletion  and     23,000    26,000    55,000
amortization
                                   --------  --------  --------
                                   --        --        --
                                   123,182   104,293   132,887
                                   --------  --------  --------
                                   --        --        --
Net  income  before cumulative
effects
 of accounting changes             52,270    153,258   251,639

Cumulative effect of change in
accounting
  principle - SFAS No.  143  -     (91,424)  -         -
See Note 3
Cumulative effect of change in
accounting principle
  - change in depletion method     -         (55,000)  -
- See Note 4
                                   --------  --------  --------
                                   --        --        --
Net income (loss)               $  (39,154)  98,258    251,639
                                   ======    ======    ======
Net  income  (loss)  allocated
to:

 Managing General Partner       $  (1,454)   16,133    27,598
                                   ======    ======    ======
 General Partner                $  (162)     1,793     3,066
                                   ======    ======    ======
 Limited partners               $  (37,538)  80,332    220,975
                                   ======    ======    ======
   Per  limited  partner  unit  $     4.00
before cumulative effect                     12.10     19.76
    Cumulative   effects   per      (7.36)             -
limited partner unit                         (4.92)
                                   --------  --------  --------
                                   --        --        --
  Per limited partner unit      $   (3.36)
                                             7.18      19.76
                                   ======    ======    ======
Pro   forma  amounts  assuming
changes are applied
  retroactively (See  Notes  3
and 4 for details):
  Net income before cumulative  $  -         139,070   255,496
effect
                                   ======    ======    ======
   Per  limited  partner  unit  $        -
(11,181.0 units)                             10.96     20.23
                                   ======    ======    ======




                  The accompanying notes are an integral
                   part of these financial statements.
<PAGE>
         Southwest Royalties Institutional Income Fund X-B, L.P.
                     (a Delaware limited partnership)
                 Statement of Changes in Partners' Equity
               Years ended December 31, 2003, 2002 and 2001

                            General   Limited
                            Partners  Partners   Total
                            --------  --------   -----
Balance at December 31,  $  (32,315)  663,378   631,063
2000

 Net income                 30,664    220,975   251,639

 Distributions              (40,180)  (361,616  (401,796
                                      )         )
                            --------  --------  --------
                            --        ---       ---
Balance at December 31,     (41,831)  522,737   480,906
2001

 Net income                 17,926    80,332    98,258

 Distributions              (17,625)  (158,629  (176,254
                                      )         )
                            --------  --------  --------
                            --        ---       ---
Balance at December 31,     (41,530)  444,440   402,910
2002

 Net loss                   (1,616)   (37,538)  (39,154)

 Distributions              (17,014)  (153,123  (170,137
                                      )         )
                            --------  --------  --------
                            --        ---       ---
Balance at December 31,  $  (60,160)  253,779   193,619
2003
                            ======    ======    ======

























                  The accompanying notes are an integral
                   part of these financial statements.

<PAGE>
         Southwest Royalties Institutional Income Fund X-B, L.P.
                     (a Delaware limited partnership)
                         Statements of Cash Flows
               Years ended December 31, 2003, 2002 and 2001

                                     2003      2002      2001
                                     ----      ----      ----
Cash   flows  from   operating
activities:

   Cash   received  from   net  $  193,460   228,789   443,948
profits interests
 Cash paid to Managing General
Partner
   for administrative fees and
general
  and administrative overhead      (84,542)  (78,495)  (77,319)
 Interest received                 357       609       3,220
 Miscellaneous settlement          7,605     3,661     -
                                   --------  --------  --------
                                   ---       ---       ---
    Net   cash   provided   by     116,880   154,564   369,849
operating activities
                                   --------  --------  --------
                                   ---       ---       ---
Cash    flows   provided    by
investing activities:

   Sale   of   oil   and   gas     -         37,500    -
properties
                                   --------  --------  --------
                                   ---       ---       ---
Cash  flows used in  financing
activities:

 Distributions to partners         (169,805  (176,291  (401,760
                                   )         )         )
                                   --------  --------  --------
                                   ---       ---       ---
Net  (decrease)  increase   in     (52,925)  15,773    (31,911)
cash and cash equivalents

Beginning of period                64,725    48,952    80,863
                                   --------  --------  --------
                                   ---       ---       ---
End of period                   $  11,800    64,725    48,952
                                   ======    ======    ======
                                                       (continu
                                                       ed)


<PAGE>
         Southwest Royalties Institutional Income Fund X-B, L.P.
                     (a Delaware limited partnership)
                         Statements of Cash Flows
         Years ended December 31, 2003, 2002 and 2001 (continued)

                                     2003      2002      2001
                                     ----      ----      ----
Reconciliation of  net  income
(loss) to net cash
    provided    by   operating
activities:

Net income (loss)               $  (39,154)  98,258    251,639

Adjustments  to reconcile  net
income
  (loss)  to net cash provided
by
 operating activities:

  Depreciation, depletion  and     23,000    26,000    55,000
amortization
 Accretion of asset retirement     15,335    -         -
obligation
  Cumulative effect of  change     91,424    55,000    -
in accounting principle
    Decrease   (increase)   in     25,970    (24,492)  62,642
receivables
    Increase   (decrease)   in     305       (202)     568
payables
                                   --------  --------  --------
                                   ---       ---       ---
Net cash provided by operating  $  116,880   154,564   369,849
activities
                                   ======    ======    ======
Noncash investing and
financing activities:

 Increase in oil and gas
properties - Adoption
  of SFAS No. 143               $  101,341   -         -
                                   ======    ======    ======
 Increase in oil and gas
properties -
  Addition of new well          $  76        -         -
                                   ======    ======    ======






















                  The accompanying notes are an integral
                   part of these financial statements.
<PAGE>
         Southwest Royalties Institutional Income Fund X-B, L.P.
                     (a Delaware limited partnership)

                      Notes to Financial Statements

1.   Organization
     Southwest  Royalties Institutional Income Fund X-B, L.P. was organized
     under  the laws of the state of Delaware on November 27, 1990 for  the
     purpose  of acquiring producing oil and gas properties and to  produce
     and market crude oil and natural gas produced from such properties for
     a  term  of 50 years, unless terminated at an earlier date as provided
     for  in the Partnership Agreement.  The Partnership sells its oil  and
     gas  production to a variety of purchasers with the prices it receives
     being  dependent  upon the oil and gas economy.  Southwest  Royalties,
     Inc. serves as the Managing General Partner and H. H. Wommack, III, as
     the  individual  general partner.  Revenues, costs  and  expenses  are
     allocated as follows:

                                                         Limite   Gener
                                                            d      al
                                                         Partne   Partn
                                                           rs      ers
                                                         ------   -----
                                                          -----   -----
                                                                   --
                   Interest     income    on     capital 100%     -
                   contributions
                   Oil and gas sales                     90%      10%
                   All other revenues                    90%      10%
                   Organization and offering costs (1)   100%     -
                   Amortization of organization costs    100%     -
                   Property acquisition costs            100%     -
                   Gain/loss on property disposition     90%      10%
                   Operating  and  administrative  costs 90%      10%
                   (2)
                   Depreciation,      depletion      and
                   amortization
                    of oil and gas properties            100%     -
                   All other costs                       90%      10%

          (1)All  organization  costs in excess of 3%  of  initial  capital
          contributions  will be paid by the Managing General  Partner  and
          will  be treated as a capital contribution.  The Partnership paid
          the  Managing  General Partner an amount equal to 3%  of  initial
          capital contributions for such organization costs.

          (2)Administrative costs in any year, which exceed 2%  of  capital
          contributions shall be paid by the Managing General  Partner  and
          will be treated as a capital contribution.

2.   Summary of Significant Accounting Policies

     Oil and Gas Properties
     Oil  and  gas properties are accounted for at cost under the full-cost
     method.   Under  this  method, all productive and nonproductive  costs
     incurred   in   connection  with  the  acquisition,  exploration   and
     development of oil and gas reserves are capitalized.  Gain or loss  on
     the   sale  of  oil  and  gas  properties  is  not  recognized  unless
     significant oil and gas reserves are involved.

     Should the net capitalized costs exceed the estimated present value of
     oil  and  gas reserves, discounted at 10%, such excess costs would  be
     charged  to current expense.  In applying the units-of-revenue  method
     for the year ended December 31, 2001, we have not excluded royalty and
     net profit interest payments from gross revenues as all of our royalty
     and  net profit interests have been purchased and capitalized  to  the
     depletion basis of our proved oil and gas properties.  As of  December
     31,  2003, 2002 and 2001 the net capitalized costs did not exceed  the
     estimated present value of the oil and gas reserves.

     The  Partnership's interest in oil and gas properties consists of  net
     profits  interests in proved properties located within the continental
     United States.  A net profits interest is created when the owner of  a
     working  interest  in a property enters into an arrangement  providing
     that  the  net profits interest owner will receive a stated percentage
     of  the net profit from the property.  The net profits interest  owner
     will not otherwise participate in additional costs and expenses of the
     property.


<PAGE>
         Southwest Royalties Institutional Income Fund X-B, L.P.
                     (a Delaware limited partnership)

                      Notes to Financial Statements

2.   Summary of Significant Accounting Policies - continued

     Oil and Gas Properties - continued
     The Partnership recognizes income from its net profits interest in oil
     and  gas  property  on  an  accrual basis, while  the  quarterly  cash
     distributions  of the net profits interest are based on a  calculation
     of  actual  cash  received from oil and gas  sales,  net  of  expenses
     incurred  during  that quarterly period.  If the net profits  interest
     calculation  results in expenses incurred exceeding the  oil  and  gas
     income  received during a quarter, no cash distribution is due to  the
     Partnership's net profits interest until the deficit is recovered from
     future  net profits.  The Partnership accrues a quarterly loss on  its
     net profits interest provided there is a cumulative net amount due for
     accrued  revenue  as of the balance sheet date.  As  of  December  31,
     2003,  there were no timing differences, which resulted in  a  deficit
     net profit interest.

     Estimates and Uncertainties
     The  preparation of financial statements in conformity with  generally
     accepted  accounting principles requires management to make  estimates
     and  assumptions  that  affect  the reported  amounts  of  assets  and
     liabilities and disclosure of contingent assets and liabilities at the
     date  of the financial statements and the reported amounts of revenues
     and  expenses during the reporting period. The Partnerships  depletion
     calculation and full-cost ceiling test for oil and gas properties uses
     oil and gas reserves estimates, which are inherently imprecise. Actual
     results could differ from those estimates.

     Syndication Costs
     Syndication  costs  are  accounted for as a reduction  of  partnership
     equity.

     Environmental Costs
     The  Partnership  is  subject to extensive federal,  state  and  local
     environmental laws and regulations.  These laws, which are  constantly
     changing, regulate the discharge of materials into the environment and
     may  require  the Partnership to remove or mitigate the  environmental
     effects of the disposal or release of petroleum or chemical substances
     at   various  sites.   Environmental  expenditures  are  expensed   or
     capitalized depending on their future economic benefit.  Costs,  which
     improve a property as compared with the condition of the property when
     originally  constructed or acquired and costs,  which  prevent  future
     environmental contamination are capitalized.  Expenditures that relate
     to  an  existing condition caused by past operations and that have  no
     future  economic benefits are expensed.  Liabilities for  expenditures
     of  a  non-capital  nature are recorded when environmental  assessment
     and/or  remediation  is  probable, and the  costs  can  be  reasonably
     estimated.

     Revenue Recognition
     We  recognize  oil  and gas sales when delivery to the  purchaser  has
     occurred  and title has transferred.  This occurs when production  has
     been delivered to a pipeline or transport vehicle.

     Gas Balancing
     The  Partnership  utilizes the sales method  of  accounting  for  gas-
     balancing  arrangements.  Under this method the Partnership recognizes
     sales revenue on all gas sold. As of December 31, 2003 and 2002, there
     were no significant amounts of imbalance in terms of units or value.

     Income Taxes
     No  provision  for  income  taxes  is  reflected  in  these  financial
     statements, since the tax effects of the Partnership's income or  loss
     are passed through to the individual partners.

     In   accordance  with  the  requirements  of  Statement  of  Financial
     Accounting  Standards  No. 109, "Accounting  for  Income  Taxes,"  the
     Partnership's tax basis in its net oil and gas properties at  December
     31,  2003  and 2002 is $557,021 and $259,529, respectively, more  than
     that  shown  on  the  accompanying Balance Sheets in  accordance  with
     generally accepted accounting principles.

<PAGE>
         Southwest Royalties Institutional Income Fund X-B, L.P.
                     (a Delaware limited partnership)

                      Notes to Financial Statements

2.   Summary of Significant Accounting Policies - continued

     Cash and Cash Equivalents
     For purposes of the statement of cash flows, the Partnership considers
     all  highly liquid debt instruments purchased with a maturity of three
     months or less to be cash equivalents.  The Partnership maintains  its
     cash at one financial institution.

     Number of Limited Partner Units
     As  of  December  31,  2003, 2002 and 2001 there were  11,181  limited
     partner   units  outstanding  held  by  580,  593  and  593  partners,
     respectively.

     Concentrations of Credit Risk
     The  Partnership is subject to credit risk through trade  receivables.
     Although  a  substantial portion of its debtors'  ability  to  pay  is
     dependent upon the oil and gas industry, credit risk is minimized  due
     to  a  large customer base.  All partnership revenues are received  by
     the   Managing  General  Partner  and  subsequently  remitted  to  the
     partnership and all expenses are paid by the Managing General  Partner
     and subsequently reimbursed by the partnership.

     Fair Value of Financial Instruments
     The  carrying amount of cash and accounts receivable approximates fair
     value due to the short maturity of these instruments.

     Net Income (loss) per limited partnership unit
     The  net  income (loss) per limited partnership unit is calculated  by
     using the number of outstanding limited partnership units.

     Recent Accounting Pronouncements
     The EITF is considering two issues related to the reporting of oil and
     gas  mineral  rights.  Issue  No. 03-O, "Whether  Mineral  Rights  Are
     Tangible  or Intangible Assets," is whether or not mineral rights  are
     intangible  assets pursuant to SFAS No. 141, "Business  Combinations."
     Issue  No.  03-S,  "Application of SFAS No. 142,  Goodwill  and  Other
     Intangible  Assets,  to Oil and Gas Companies," is,  if  oil  and  gas
     drilling  rights  are  intangible assets,  whether  those  assets  are
     subject  to the classification and disclosure provisions of  SFAS  No.
     142.   The  Partnership classifies the cost of  oil  and  gas  mineral
     rights  as  properties  and  equipment  and  believes  that  this   is
     consistent  with  oil and gas accounting and industry  practice.   The
     disclosures  required by SFAS Nos. 141 and 142 would be  made  in  the
     notes  to  the financial statements. There would be no effect  on  the
     statement of income or cash flows as the intangible assets related  to
     oil  and  gas mineral rights would continue to be amortized under  the
     full cost method of accounting.

     Depletion Policy
     In  2002,  the Partnership changed methods of accounting for depletion
     of capitalized costs from the units-of-revenue method to the units-of-
     production method. (See Note 4)

3.   Cumulative effect of change in accounting principle - SFAS No. 143
     On  January  1, 2003, the Partnership adopted Statement  of  Financial
     Accounting   Standards  No.  143,  Accounting  for  Asset   Retirement
     Obligations  ("SFAS No. 143").  Adoption of SFAS No. 143  is  required
     for  all  companies with fiscal years beginning after June  15,  2002.
     The new standard requires the Partnership to recognize a liability for
     the  present  value  of  all  legal obligations  associated  with  the
     retirement  of tangible long-lived assets and to capitalize  an  equal
     amount as a cost of the asset and depreciate the additional cost  over
     the  estimated  useful  life of the asset.  On January  1,  2003,  the
     Partnership    recorded   additional   costs,   net   of   accumulated
     depreciation,  of  approximately $101,341, a long  term  liability  of
     approximately  $192,765 and a loss of approximately  $91,424  for  the
     cumulative  effect  on  depreciation  of  the  additional  costs   and
     accretion  expense  on  the liability related to expected  abandonment
     costs  of  its oil and natural gas producing properties.  At  December
     31,  2003,  the  asset  retirement obligation was  $205,889,  and  the
     increase  in  the  balance from January 1, 2003 is  due  to  accretion
     expense  of $15,335 plus the addition of a new well for $76, partially
     offset  by  the plug and abandonment of oil and gas properties,  which
     decreased  the asset retirement obligation by $2,287.  The  pro  forma
     amounts  of the asset retirement obligation as of December  31,  2002,
     2001  and  2000, were approximately $192,765, $178,577  and  $165,434,
     respectively.    The  pro  forma  amounts  of  the  asset   retirement
     obligation  were measured using information, assumptions and  interest
     rates  as  of  the adoption date of January 1, 2003.   The  pro  forma
     amounts  for  the  years ended December 31, 2002 and 2001,  which  are
     presented below, reflect the effect of retroactive application of SFAS
     No. 143.
<PAGE>
         Southwest Royalties Institutional Income Fund X-B, L.P.
                     (a Delaware limited partnership)

                      Notes to Financial Statements

3.    Cumulative effect of change in accounting principle - SFAS No. 143  -
continued

                                     2002      2001
                                     ----      ----
Pro   forma  amounts  assuming
change is applied
 retroactively:
  Net income before cumulative
effect
    for  change  in  depletion  $  139,070   238,496
method
                                   ======    ======
   Per  limited  partner  unit  $    10.96
(11,181.0 units)                             18.70
                                   ======    ======
 Net income                     $  84,070    238,496
                                   ======    ======
   Per  limited  partner  unit  $     6.04
(11,181.0 units)                             18.70
                                   ======    ======

4.    Cumulative  effect of a change in accounting principle  -  change  in
depletion method
     In  2002,  the Partnership changed methods of accounting for depletion
     of capitalized costs from the units-of-revenue method to the units-of-
     production   method.   The  newly  adopted  accounting  principle   is
     preferable in the circumstances because the units-of-production method
     results  in  a better matching of the costs of oil and gas  production
     against the related revenue received in periods of volatile prices for
     production  as have been experienced in recent periods.  Additionally,
     the  units-of-production method is the predominant method used by full
     cost  companies in the oil and gas industry, accordingly,  the  change
     improves  the comparability of the Partnership's financial  statements
     with  its peer group.  The Partnership adopted the units-of-production
     method  through the recording of a cumulative effect of  a  change  in
     accounting principle in the amount of $55,000 effective as of  January
     1,  2002.   The Partnership's depletion for the years ended  2003  and
     2002  have  been calculated using the units-of-production  method  and
     2001 has not been restated.  The pro forma amounts for 2001, which are
     presented below, reflect the effect of retroactive application of  the
     units-of-production method.  See Note 11 for the effects of the change
     in depletion method on the individual quarters of 2002.

                                     2001
                                     ----
Pro   forma  amounts  assuming
change is applied
 retroactively:
 Net income                     $  268,639
                                   ======
   Per  limited  partner  unit  $    21.28
(11,181.0 units)
                                   ======

5.   Liquidity - Managing General Partner
     As  of December 31, 2003, the Managing General Partner is in violation
     of   several  covenants  pertaining  to  their  Amended  and  Restated
     Revolving  Credit Agreement due June 1, 2006 and their  Senior  Second
     Lien  Secured  Credit  Agreement due October 15,  2008.   Due  to  the
     covenant violations, the Managing General Partner is in default  under
     their  Amended and Restated Revolving Credit Agreement and the  Senior
     Second Lien Secured Credit Agreement, and all amounts due under  these
     agreements have been classified as a current liability on the Managing
     General Partner's balance sheet at December 31, 2003.  The significant
     working  capital  deficit and debt being in default  at  December  31,
     2003,  raise  substantial doubt about the Managing  General  Partner's
     ability to continue as a going concern.

     Subsequent  to  December  31, 2003, the  Board  of  Directors  of  the
     Managing  General Partner announced its decision to explore a  merger,
     sale  of the stock or other transaction involving the Managing General
     Partner.   The  Board  has formed a Special Committee  of  independent
     directors  to  oversee the sales process.  The Special  Committee  has
     retained independent financial and legal advisors to work closely with
     the  management of the Managing General Partner to implement the sales
     process.   There  can  be no assurance that a  sale  of  the  Managing
     General Partner will be consummated or what terms, if consummated, the
     sale will be on.
<PAGE>
          Southwest Royalties Institutional Income Fund X-B, L.P.
                     (a Delaware limited partnership)

                      Notes to Financial Statements

6.   Commitments and Contingent Liabilities
     Managing  General  Partner has the right, but not the  obligation;  to
     purchase limited partnership units should an investor desire to  sell.
     The  value of the unit is determined by adding the sum of (1)  current
     assets  less liabilities and (2) the present value of the  future  net
     revenues attributable to proved reserves and by discounting the future
     net  revenues  at  a rate not in excess of the prime rate  charged  by
     NationsBank, N.A. of Midland, Texas plus one percent (1%), which value
     shall be further reduced by a risk factor discount of no more than one-
     third  (1/3) to be determined by the Managing General Partner  in  its
     sole and absolute discretion.

     The  Partnership  is  subject  to various  federal,  state  and  local
     environmental  laws  and  regulations, which establish  standards  and
     requirements  for  protection  of the  environment.   The  Partnership
     cannot  predict the future impact of such standards and  requirements,
     which  are  subject to change and can have retroactive  effectiveness.
     The  Partnership  continues to monitor the status of  these  laws  and
     regulations.

     As  of December 31, 2003, the Partnership has not been fined, cited or
     notified  of any environmental violations and management is not  aware
     of  any  unasserted  violations, which would have a  material  adverse
     effect upon capital expenditures, earnings or the competitive position
     in  the  oil and gas industry.  However, the Managing General  Partner
     does  recognize  by  the very nature of its business,  material  costs
     could be incurred in the near term to bring the Partnership into total
     compliance.   The amount of such future expenditures is  not  reliably
     determinable  due to several factors, including the unknown  magnitude
     of  possible  contaminations, the unknown timing  and  extent  of  the
     corrective  actions  which may be required, the determination  of  the
     Partnership's liability in proportion to other responsible parties and
     the  extent to which such expenditures are recoverable from  insurance
     or indemnifications from prior owners of Partnership's properties.

7.   Related Party Transactions
     A  significant  portion  of the oil and gas properties  in  which  the
     Partnership  has  an interest are operated by and purchased  from  the
     Managing  General Partner.  As provided for in the operating agreement
     for  each respective oil and gas property in which the Partnership has
     an  interest,  the  operator  is  paid an  amount  for  administrative
     overhead attributable to operating such properties, with such  amounts
     to  Southwest  Royalties,  Inc.  as  operator  approximating  $74,100,
     $75,900  and $76,400 for the years ended December 31, 2003,  2002  and
     2001,   respectively.   The   amounts  for   administrative   overhead
     attributable  to  operating  the  partnership  properties  have   been
     deducted from gross oil and gas revenues in the determination  of  net
     profit  interest.    In  addition, the Managing  General  Partner  and
     certain  officers and employees may have an interest in  some  of  the
     properties that the Partnership also participates.

     Southwest  Royalties,  Inc., the Managing General  Partner,  was  paid
     $72,000  during  2003,  2002 and 2001, as an administrative  fee,  for
     indirect   general   and   administrative   overhead   expenses.   The
     administrative fees are included in general and administrative expense
     on the statement of operations.

     Receivables  from  Southwest  Royalties, Inc.,  the  Managing  General
     Partner,  of  approximately $50,100 and $78,700 are from oil  and  gas
     production, net of lease operating costs and production taxes,  as  of
     December 31, 2003 and 2002, respectively.

8.   Major Customers
     No  material portion of the Partnership's business is dependent  on  a
     single  purchaser, or a very few purchasers, where  the  loss  of  one
     would  have  a  material  adverse impact  on  the  Partnership.   Four
     purchasers  accounted for 80% of the Partnership's total oil  and  gas
     production  during 2003:  Plains Marketing LP for 32%,  Exxon  Company
     for  21%,  Duke  Energy Field Services LP for 17%  and  ConocoPhillips
     Company  for  10%.   Three  purchasers  accounted  for  68%   of   the
     Partnership's  total  oil  and  gas  production  during  2002:  Plains
     Marketing LP for 31%, Exxon Company USA for 23% and Duke Energy  Field
     Services  for  14%.   Four  purchasers  accounted  for  67%   of   the
     Partnership's  total  oil  and  gas production  during  2001:   Plains
     Marketing  LP  for  29%,  Duke Energy Field Services  for  17%,  Mobil
     Corporation for 11% and Exxon Company USA for 10%.  All purchasers  of
     the  Partnership's oil and gas production are unrelated third parties.
     In  the  event any of these purchasers were to discontinue  purchasing
     the  Partnership's production, the Managing General  Partner  believes
     that  a  substitute purchaser or purchasers could be  located  without
     undue  delay.  No other purchaser accounted for an amount equal to  or
     greater than 10% of the Partnership's sales of oil and gas production.

<PAGE>
          Southwest Royalties Institutional Income Fund X-B, L.P.
                     (a Delaware limited partnership)

                      Notes to Financial Statements

9.   Subsequent Event
     Subsequent  to  December  31,  2003,  the  Managing  General   Partner
     announced that its Board of Directors had decided to explore a  merger
     or  sale  of  the  stock of the Company.  The Board formed  a  Special
     Committee  of independent directors to oversee the sale process.   The
     Special Committee retained independent financial and legal advisors to
     work closely with management to implement the sale process.

     On  May  3,  2004, the Managing General Partner entered  into  a  cash
     merger  agreement to sell all of its stock to Clayton Williams Energy,
     Inc.  The cash merger price is being negotiated, but is expected to be
     approximately  $45 per share.  The transaction, which  is  subject  to
     approval  by the Managing General Partner's shareholders, is  expected
     to close no later than May 21, 2004.

10.  Estimated Oil and Gas Reserves (unaudited)
     The  Partnership's  interest in proved oil  and  gas  reserves  is  as
     follows:

                                Oil       Gas
                               (bbls)    (mcf)
                              --------  --------
                                ----      ---
Total Proved -
January 1, 2001               301,000   793,000

Revisions    of     previous  (84,000)  (101,000
estimates                               )
Production                    (22,000)  (77,000)
                              --------  --------
                              --        ---
December 31, 2001             195,000   615,000

Sale of reserves in place     (3,000)   (6,000)
Revisions    of     previous  45,000    168,000
estimates
Production                    (19,000)  (68,000)
                              --------  --------
                              --        ---
December 31, 2002             218,000   709,000

Revisions    of     previous  (1,000)   172,000
estimates
Production                    (19,000)  (63,000)
                              --------  --------
                              --        ---
December 31, 2003             198,000   818,000
                              ======    ======
Proved developed reserves -

December 31, 2001             192,000   606,000
                              ======    ======
December 31, 2002             187,000   693,000
                              ======    ======
December 31, 2003             171,000   676,000
                              ======    ======

     All  of  the Partnership's reserves are located within the continental
     United States.
<PAGE>
         Southwest Royalties Institutional Income Fund X-B, L.P.
                     (a Delaware limited partnership)

                      Notes to Financial Statements

10.  Estimated Oil and Gas Reserves (unaudited) - continued
     *Ryder Scott Company, L.P. prepared the reserve and present value data
     for  the Partnership's existing properties as of January 1, 2004.  The
     reserve  estimates were made in accordance with guidelines established
     by  the Securities and Exchange Commission pursuant to Rule 4-10(a) of
     Regulation  S-X.  Such guidelines require oil and gas reserve  reports
     be  prepared under existing economic and operating conditions with  no
     provisions  for  price  and  cost  escalation  except  by  contractual
     arrangements.

     Oil  price  adjustments  were made in the  individual  evaluations  to
     reflect  oil quality, gathering and transportation costs. The  results
     of  the  reserve report as of January 1, 2004, 2003 and  2002  are  an
     average price of $31.39, $29.45 and $18.44 per barrel.

     Gas  price  adjustments  were made in the  individual  evaluations  to
     reflect  BTU  content,  gathering and  transportation  costs  and  gas
     processing  and shrinkage.  The results of the reserve  report  as  of
     January  1,  2004, 2003 and 2002 are an average price of $5.34,  $4.06
     and $1.80 per Mcf.

     The  evaluation of oil and gas properties is not an exact science  and
     inevitably  involves a significant degree of uncertainty, particularly
     with respect to the quantity of oil or gas that any given property  is
     capable of producing.  Estimates of oil and gas reserves are based  on
     available  geological and engineering data, the extent and quality  of
     which may vary in each case and, in certain instances, may prove to be
     inaccurate.   Consequently, properties may be  depleted  more  rapidly
     than the geological and engineering data have indicated.

     Unanticipated  depletion, if it occurs, will result in lower  reserves
     than  previously estimated; thus an ultimately lower  return  for  the
     Partnership.  Basic changes in past reserve estimates occur  annually.
     As  new data is gathered during the subsequent year, the engineer must
     revise  his  earlier estimates.  A year of new information,  which  is
     pertinent  to  the  estimation  of  future  recoverable  volumes,   is
     available  during  the subsequent year evaluation.   In  applying  the
     industry  audit standards and procedures, the new data may  cause  the
     previous  estimates  to  be revised.  This revision  may  increase  or
     decrease   the  earlier  estimated  volumes.   Pertinent   information
     gathered  during  the year may include actual production  and  decline
     rates,  production  from offset wells drilled  to  the  same  geologic
     formation,  increased  or decreased water production,  workovers,  and
     changes   in  lifting  costs,  among  others.   Accordingly,   reserve
     estimates are often different from the quantities of oil and gas  that
     are ultimately recovered.

     The Partnership has reserves, which are classified as proved developed
     and  proved  undeveloped.  All of the proved reserves are included  in
     the  engineering  reports,  which evaluate the  Partnership's  present
     reserves.

     Because  the  Partnership does not engage in drilling activities,  the
     development  of proved undeveloped reserves is conducted  pursuant  to
     farm-out  arrangements with the Managing General Partner or  unrelated
     third  parties.  Generally, the Partnership retains a carried interest
     such as an overriding royalty interest under the terms of a farm-out.

<PAGE>

         Southwest Royalties Institutional Income Fund X-B, L.P.
                     (a Delaware limited partnership)

                      Notes to Financial Statements

10.  Estimated Oil & Gas Reserves (unaudited) - continued
     The  standardized measure of discounted future net cash flows relating
     to  proved oil and gas reserves at December 31, 2003, 2002 and 2001 is
     presented below:

                              2003      2002      2001
                              ----      ----      ----

Future cash inflows      $  10,579,0  9,286,00  4,699,00
                            00        0         0
Production, development
and
 abandonment costs          4,883,00  4,571,00  2,803,00
                            0         0         0
                            --------  --------  --------
                            -----     ----      ----
Future net cash flows       5,696,00  4,715,00  1,896,00
                            0         0         0
10% annual discount for
  estimated  timing  of     2,472,00  2,024,00  813,000
cash flows                  0         0
                            --------  --------  --------
                            ----      ----      ----
Standardized measure of
  discounted future net  $  3,224,00  2,691,00  1,083,00
cash flows                  0         0         0
                            =======   =======   =======

     The  principal  sources  of  change in  the  standardized  measure  of
     discounted  future  net cash flows for the years  ended  December  31,
     2003, 2002 and 2001 are as follows:

                              2003      2002      2001
                              ----      ----      ----

Sales  of oil  and  gas
produced,
   net   of  production  $  (165,000  (253,000  (382,000
costs                       )         )         )
Changes  in prices  and     396,000   1,200,00  (3,323,0
production costs                      0         00)
Changes  of  production
rates
 (timing) and others        (234,000  (16,000)  103,000
                            )
Sale  of  minerals   in     -         (13,000)  -
place
Revisions of previous
 quantities estimates       267,000   582,000   (367,000
                                                )
Accretion of discount       269,000   108,000   459,000
Discounted future net
 cash flows -
Beginning of year           2,691,00  1,083,00  4,593,00
                            0         0         0
                            --------  --------  --------
                            ----      ----      ----
End of year              $  3,224,00  2,691,00  1,083,00
                            0         0         0
                            =======   =======   =======

     Future  net cash flows were computed using year-end prices  and  costs
     that  related  to existing proved oil and gas reserves  in  which  the
     Partnership has mineral interests.

<PAGE>

         Southwest Royalties Institutional Income Fund X-B, L.P.
                     (a Delaware limited partnership)

                      Notes to Financial Statements

11.  Selected Quarterly Financial Results - (unaudited)

                                             Quarter
                              --------------------------------------
                              --------------------------------------
                                                -
                               First     Second    Third     Fourth
                               ------   --------  -------   --------
                                          ---                  -
2003:
 Total revenues             $ 125,899   54,386    32,249    (37,082)
 Total expenses               28,224    37,651    31,334    25,973
                              --------  --------  --------  --------
                              ----      ----      ----      ----
    Net    income   before
cumulative effect of
   a  change in accounting    97,675    16,735    915       (63,055)
principle
 Cumulative effect of SFAS    (91,424)  -         -         -
No. 143
                              --------  --------  --------  --------
                              ----      ----      ----      ----
 Net income (loss)          $ 6,251     16,735    915       (63,055)
                              =======   =======   =======   =======
  Per limited partner unit
amounts:
   Income  (loss)   before  $   7.82                   .02
cumulative effect                       1.28                (5.12)
  Cumulative  effect  SFAS    (7.36)         -         -         -
No. 143
                              --------  --------  --------  --------
                              ----      ----      ----      ----
Net income (loss)           $    .46                   .02
                                        1.28                (5.12)
                              =======   =======   =======   =======

     As  discussed  in Note 4, in 2002 the Partnership changed  methods  of
     accounting  for  depletion  of capitalized costs  from  the  units-of-
     revenue  method to the units-of-production method.  The 2002 quarterly
     financial  results  presented below reflect the  change  in  depletion
     method effective as of January 1, 2002.

                                             Quarter
                              --------------------------------------
                              --------------------------------------
                                                -
                               First     Second    Third     Fourth
                               ------   --------  -------   --------
                                          ---                  -
2002:
 Total revenues             $ 29,439    59,859    90,818    77,435
 Total expenses               26,283    26,205    27,260    24,545
                              --------  --------  --------  --------
                              ----      ----      ----      ----
  Income before cumulative
effect of
   a  change in accounting    3,156     33,654    63,558    52,890
principle
   Cumulative  effect   on
prior years (to
   December 31,  2001)  of
changing to a
     different   depletion    (55,000)  -         -         -
method
                              --------  --------  --------  --------
                              ----      ----      ----      ----
 Net income (loss)          $ (51,844)  33,654    63,558    52,890
                              =======   =======   =======   =======
  Per limited partner unit
amounts:
   Income  (loss)   before
cumulative effect of a
    change  in  accounting  $    .19
principle                               2.65      5.05      4.21
   Cumulative  effect   on
prior years (to
   December 31,  2001)  of
changing to a
     different   depletion    (4.92)         -         -         -
method
                              --------  --------  --------  --------
                              ----      ----      ----      ----
Net income (loss)           $ (4.73)
                                        2.65      5.05      4.21
                              =======   =======   =======   =======

<PAGE>

Item 9.   Changes  in and Disagreements With Accountants on Accounting  and
          Financial Disclosure

None

Item 9A.  Controls and Procedures

Disclosure Controls and Procedures
As  of  the year ended December 31, 2003, H.H. Wommack, III, President  and
Chief  Executive  Officer  of the Managing General  Partner,  and  Bill  E.
Coggin,  Executive  Vice  President and  Chief  Financial  Officer  of  the
Managing  General Partner, evaluated the effectiveness of the Partnership's
disclosure  controls  and  procedures.  Based  on  their  evaluation,  they
believe that:

     The disclosure controls and procedures of the Partnership were
     effective in ensuring that information required to be disclosed by the
     Partnership in the reports it files or submits under the Exchange Act
     was recorded, processed, summarized and reported within the time
     periods specified in the SEC's rules and forms; and

     The  disclosure  controls  and  procedures  of  the  Partnership  were
     effective  in  ensuring  that  material  information  required  to  be
     disclosed by the Partnership in the report it filed or submitted under
     the  Exchange  Act was accumulated and communicated  to  the  Managing
     General  Partner's  management,  including  its  President  and  Chief
     Executive Officer and Chief Financial Officer, as appropriate to allow
     timely decisions regarding required disclosure.

Internal Control Over Financial Reporting
There  has  not been any change in the Partnership's internal control  over
financial reporting that occurred during the year ended December  31,  2003
that has materially affected, or is reasonably likely to materially affect,
it internal control over financial reporting.

<PAGE>
                                 Part III

Item 10.  Directors and Executive Officers of the Registrant

Management of the Partnership is provided by Southwest Royalties, Inc.,  as
Managing  General Partner.  The names, ages, offices, positions and  length
of  service of the directors and executive officers of Southwest Royalties,
Inc.  are  set  forth below.  Each director and executive  officer  of  the
Managing General Partner serves for a term of one year.

         Name               Age               Position
-----------------------     ---     -----------------------------
----------------------      --      -----------------------------
H. H. Wommack, III          48      Chairman   of   the    Board,
                                    President, Director
                                    and Chief Executive Officer
James N. Chapman(1)         41      Director
William P. Nicoletti(2)     58      Director
Joseph J. Radecki,  Jr.     45      Director
(2)
Richard D. Rinehart(1)      68      Director
John M. White(2)            48      Director
Herbert  C. Williamson,     55      Director
III(1)
Bill E. Coggin              49      Executive Vice President  and
                                    Chief Financial Officer
J. Steven Person            45      Vice President, Marketing

(1)  Member of the Compensation Committee

(2)  Member of the Audit Committee

H.  H.  Wommack, III has served as Chairman of the Board, President,  Chief
Executive Officer and a director since Southwest's founding in 1983.  Since
1997  Mr.  Wommack  has  served as President, Chief Executive  Officer  and
Chairman of SRH, Southwest's former parent and current holder of 10% of its
voting  share capital.  SRH holds an equity investment in Southwest and  in
Basic  Energy Services.  Since 1997 Mr. Wommack has served as  chairman  of
the  board  of directors of Midland Red Oak Realty, Inc.  Midland  Red  Oak
Realty  owns  and  manages  commercial real  estate  properties,  including
shopping centers and office buildings, in secondary real estate markets  in
the Southwestern United States.  From 1997 until December 2000, Mr. Wommack
served as chairman of the board of directors of Basic Energy Services, Inc.
and  since  December  2000  has continued to  serve  on  Basic's  board  of
directors.  Basic provides certain well services for oil and gas companies.
Prior to Southwest's formation, Mr. Wommack was a self-employed independent
oil  and  gas  producer engaged in the purchase and  sale  of  royalty  and
working  interests in oil and gas leases and the drilling  of  wells.   Mr.
Wommack graduated from the University of North Carolina at Chapel Hill  and
received his law degree from the University of Texas.

James  N.  Chapman  has served as a director since  April  19,  2002.   Mr.
Chapman is associated with Regiment Capital Advisors, LLC, which he  joined
in January 2003.  Prior to Regiment, Mr. Chapman acted as a capital markets
and  strategic  planning consultant with private and public  companies,  as
well as hedge funds, across a range of industries. Prior to establishing an
independent  consulting practice, Mr. Chapman worked for The  Renco  Group,
Inc. from December 1996 to December 2001.  Prior to Renco, Mr. Chapman  was
a  founding  principal of Fieldstone Private Capital Group in August  1990.
Prior  to joining Fieldstone, Mr. Chapman worked for Bankers Trust  Company
from  July 1985 to August 1990, most recently in the BT Securities  capital
markets area.  Mr. Chapman serves as a member of the board of directors  of
Anchor  Glass  Container Corporation, Davel Communications, Inc.,  Coinmach
Corporation, as well as a number of private companies.

William  P. Nicoletti has served as a director since April 19,  2002.   Mr.
Nicoletti  is Managing Director of Nicoletti & Company Inc., an  investment
banking  and financial advisory firm he founded in 1991.  He was previously
a  senior officer and head of the Energy Investment Banking Groups of E. F.
Hutton  &  Company Inc. and Paine Webber, Incorporated.   From  March  1998
until June 1990 he was a managing director and co-head of Energy Investment
Banking  at  McDonald Investments Inc.  Mr. Nicoletti  is  a  director  and
Chairman  of  the Audit Committee of Star Gas Partners, L.P., the  nation's
largest  retail  distributor  of  home  heating  oil  and  a  major  retail
distributor  of  propane  gas.  He is also a director  of  MarkWest  Energy
Partners,  L.P.,  a  business engaged in the gathering  and  processing  of
natural  gas and the fractionation and storage of natural gas liquids,  and
Russell-Stanley Holdings, Inc., a manufacturer and marketer  of  steel  and
plastic  industrial containers.  Mr. Nicoletti is a graduate of Seton  Hall
University  and  received an MBA degree from Columbia  University  Graduate
School of Business.
<PAGE>
Joseph J. Radecki, Jr. has served as a director since April 19, 2002.   Mr.
Radecki is currently a Managing Director in the Leveraged Finance Group  of
CIBC  World  Markets  where he is principally responsible  for  the  firm's
financial restructuring and distressed situation advisory practice.   Prior
to  joining  CIBC World Markets in 1998, Mr. Radecki was an Executive  Vice
President and Director of the Financial Restructuring Group of Jefferies  &
Company,  Inc.  beginning in 1990.  From 1983 until 1990, Mr.  Radecki  was
First  Vice President in the International Capital Markets Group at  Drexel
Burnham Lambert, Inc., where he specialized in financial restructurings and
recapitalizations.   Over the past fourteen years,  Mr.  Radecki  has  been
integrally involved in over 120 transactions totaling nearly $50 billion in
recapitalized  securities.  Mr. Radecki currently serves as a  Director  of
RBX  Corporation,  a  manufacturer of rubber and  plastic  foam  and  other
polymer  products.   He  previously served  as  a  Director  of  Wherehouse
Entertainment, Inc., a music and video specialty retailer, as  Chairman  of
the  Board  of  American  Rice,  Inc., an  international  rice  miller  and
marketer,  as  a  member  of  the  Board of Directors  of  Service  America
Corporation,   a   national   food   service   management   firm,   Bucyrus
International, Inc., a mining equipment manufacturer, and ECO-Net,  a  non-
profit  engineering related network firm.  Mr. Radecki graduated magna  cum
laude in 1980 from Georgetown University with a B.A. in Government.

Richard  D.  Rinehart has served as a director since April 19,  2002.   Mr.
Rinehart is a founding principal of PetroCap, Inc. and president of Kestrel
Resources,  Inc.   PetroCap, Inc. provides investment and merchant  banking
services  to  a  variety  of clients active in the oil  and  gas  industry.
Kestrel Resources, Inc. is a privately owned oil and gas operating company.
He  served  as Director of Coopers & Lybrand's Energy Systems and  Services
Division prior to the founding of Kestrel Resources, Inc. in 1992. Prior to
joining  Coopers & Lybrand, he was chief executive officer/founder of  Dawn
Information  Resources,  Inc., formed in 1986 and  acquired  by  Coopers  &
Lybrand  in  early  1991.  Mr. Rinehart served as CEO  of  Terrapet  Energy
Corporation during the period 1982 through 1986. Prior to the formation  of
Terrapet in 1982, he was employed as President of the Terrapet Division  of
E.I.  DuPont de Nemours and Company. Before its acquisition by  DuPont,  he
served  as  CEO and President of Terrapet Corp., a privately owned  E  &  P
company. Before the formation of Terrapet Corp. in 1972, he was manager  of
supplementary recovery methods and senior evaluation engineer  with  H.  J.
Gruy and Associates, Inc., Dallas, Texas.

John White has served as a director since April 19, 2002.  Mr. White became
an  equity  analyst for Harris Nesbitt Gerard following the acquisition  by
BMO  Financial  Group in 2003.  He had joined BMO Nesbitt  Burns  in  1998,
responsible  for  high  yield research on oil, gas  and  energy  companies.
Previously,  Mr.  White worked at John S. Herold, Inc., an independent  oil
and  gas  research and consulting firm, where he was responsible for  fixed
income  research  on the oil and gas industry.  His prior  experience  also
included four years managing a portfolio of oil and gas loans for The  Bank
of Nova Scotia.  Before entering financial services, Mr. White was with BP,
where he worked in exploration and production for seven years.  At BP,  his
experience  was  primarily  in the basins of the  Mid-Continent  and  Rocky
Mountain regions.  Mr. White is a graduate of The University of Oklahoma.

Herbert  C. Williamson, III has served as a director since April 19,  2002.
At  present, Mr. Williamson is self-employed as a consultant.   From  March
2001  to  March  2002  Mr. Williamson served as an investment  banker  with
Petrie  Parkman & Co.  From April 1999 to March 2001 Mr. Williamson  served
as chief financial officer and from August 1999 to March 2001 as a director
of  Merlon  Petroleum  Company, a private oil and gas company  involved  in
exploration  and production in Egypt.  Mr. Williamson served  as  executive
vice  president,  chief  financial  officer  and  director  of  Seven  Seas
Petroleum,  Inc., a publicly traded oil and gas exploration  company,  from
March  1998  to  April 1999.  From 1995 through April 1998,  he  served  as
director  in  the  Investment Banking Department  of  Credit  Suisse  First
Boston.   Mr.  Williamson  served  as  vice  chairman  and  executive  vice
president  of Parker and Parsley Petroleum Company, a publicly  traded  oil
and  gas  exploration company (now Pioneer Natural Resources Company)  from
1985 through 1995.

Bill  E.  Coggin  has served as Vice President and Chief Financial  Officer
since joining the Managing General Partner in 1985.  Previously, Mr. Coggin
was  Controller  for Rod Ric Corporation, an oil and gas drilling  company,
and  for  C.F.  Lawrence  &  Associates, a large independent  oil  and  gas
operator.  Mr. Coggin received a B.S. in Education and a B.A. in Accounting
from Angelo State University.

J.  Steven Person has served as Vice President, Marketing since joining the
Managing  General  Partner in 1989.  Mr. Person  began  in  the  investment
industry  with Dean Witter in 1983.  Prior to joining the Managing  General
Partner, Mr. Person was a senior wholesaler with Capital Realty, Inc. While
at  Capital  Realty, he was involved in the syndication of  mortgage  based
securities  through  the major brokerage houses.   Mr.  Person  received  a
B.B.A.  degree  from Baylor University and an M.B.A. from  Houston  Baptist
University.

Key Employees

Jon  P.  Tate,  age  46, has served as Vice President, Land  and  Assistant
Secretary  of the Managing General Partner since 1989. From 1981  to  1989,
Mr.  Tate  was employed by C.F. Lawrence & Associates, Inc., an independent
oil  and  gas company, as land manager. Mr. Tate is a member of the Permian
Basin Landman's Association.

<PAGE>
R.  Douglas  Keathley, age 48, has served as Vice President, Operations  of
the  Managing  General Partner since 1992. Before joining us, Mr.  Keathley
worked  as a senior drilling engineer for ARCO Oil and Gas Company  and  in
similar capacities for Reading & Bates Petroleum Co. and Tenneco Oil Co.

In certain instances, the Managing General Partner will engage professional
petroleum   consultants   and  other  independent  contractors,   including
engineers   and   geologists  in  connection  with  property  acquisitions,
geological  and  geophysical  analysis,  and  reservoir  engineering.   The
Managing  General Partner believes that, in addition to its own  "in-house"
staff,  the utilization of such consultants and independent contractors  in
specific  instances  and  on  an  "as-needed"  basis  allows  for   greater
flexibility  and greater opportunity to perform its oil and gas  activities
more economically and effectively.

Code of Ethics

Neither the Partnership nor the Managing General Partner has adopted a code
of  ethics  for  employees, or any principal executive officers,  principal
financial officers, principal accounting officers or the Board of Directors
of the Managing General Partner.  The Board of the Managing General Partner
believes  that  the Partnership's existing internal control procedures  and
current business practices are adequate to promote ethical conduct  and  to
deter  wrongdoing  on the part of these executives.  The  Managing  General
Partner  of  the  Partnership intends to implement during 2004  a  code  of
ethics  that will apply to these executives.  In accordance with applicable
SEC rules, the code of ethics will be made publicly available.

Audit Committee

The  current members of the Audit Committee of the Managing General Partner
are  William  P. Nicoletti, John M. White and Joseph J. Radecki,  Jr.   The
Board of Directors of the Managing General Partner has determined that  Mr.
Nicoletti, the Chairman of the Audit Committee, meets the definition of  an
"audit  committee financial expert" under Item 401(h)(2) of Regulation  S-K
and  has  also  determined that all of the members of the Audit  Committee,
including  Mr.  Nicoletti, meet the independence  requirements  of  Section
10A(m)(3) of the Securities Exchange Act of 1934, as amended, and the rules
and regulations promulgated thereunder.

Item 11.  Executive Compensation

The  Partnership  does  not  employ any directors,  executive  officers  or
employees.  The Managing General Partner receives an administrative fee for
the  management of the Partnership.  The Managing General Partner  received
$72,000 during 2003, 2002 and 2001 as an administrative fee.  The executive
officers  of  the  Managing General Partner do  not  receive  any  form  of
compensation,  from  the Partnership; instead, their compensation  is  paid
solely  by  Southwest.  The executive officers, however,  may  occasionally
perform administrative duties for the Partnership but receive no additional
compensation for this work.

Item  12.   Security Ownership of Certain Beneficial Owners and  Management
and Related Stockholder Matters

There  are  no  limited partners who own of record, or  are  known  by  the
Managing General Partner to beneficially own, more than five percent of the
Partnership's limited partnership interests.

The  Managing  General Partner owns a nine percent interest  as  a  general
partner.   Through prior purchases, the Managing General Partner also  owns
1,104.0  limited  partner units, or a 8.9% limited partner  interest.   The
Managing  General  Partner  total  percentage  interest  ownership  in  the
Partnership is 17.9%.

No  officer or director of the Managing General Partner directly owns Units
in  the Partnership.  H. H. Wommack, III, as the individual general partner
of  the  Partnership, owns a one percent interest in the Partnership  as  a
general  partner.   The  officers and directors  of  the  Managing  General
Partner  are  considered  beneficial owners of the  limited  partner  units
acquired by the Managing General Partner by virtue of their status as such.
Beneficial  ownership is determined in accordance with  the  rules  of  the
Securities and Exchange Commission and includes voting or investment  power
with  respect to the limited partner units.  To our knowledge, except under
applicable  community property laws or as otherwise indicated, the  persons
named in the table have sole voting and sole investment control with regard
to  all  limited  partner  units beneficially  owned.   We  are  presenting
ownership information as of December 31, 2003. A list of beneficial  owners
of  limited  partner units, known to the Managing General  Partner,  is  as
follows:

<PAGE>

                                                 Amount and
                                                 Nature of      Percen
                                                                  t
                        Name and Address of      Beneficial       of
  Title of Class         Beneficial Owner        Ownership      Class
-------------------    ---------------------     ----------     ------
  --------------          --------------           ------       -----
Limited Partnership    Southwest  Royalties,     Directly        8.9%
Interest               Inc.                      Owns
                       Managing      General     1,104.0
                       Partner                   Units
                       407   N.  Big  Spring
                       Street
                       Midland, TX 79701

Limited Partnership    H. H. Wommack, III        Indirectly      8.9%
Interest                                         Owns
                       Chairman    of    the     1,104.0
                       Board,                    Units
                       President, and CEO
                       of          Southwest
                       Royalties, Inc.,
                       the  Managing General
                       Partner
                       407   N.  Big  Spring
                       Street
                       Midland, TX 79701


There are no arrangements known to the Managing General Partner, which  may
at a subsequent date result in a change of control of the Partnership.

Item 13.  Certain Relationships and Related Transactions

In 2003, the Managing General Partner received $72,000 as an administrative
fee.   This  amount  is  part  of the general and  administrative  expenses
incurred by the Partnership.

In  some  instances the Managing General Partner and certain  officers  and
employees  may  be working interest owners in an oil and  gas  property  in
which  the Partnership also has a working interest.  Certain properties  in
which  the Partnership has an interest are operated by the Managing General
Partner,  who  was  paid approximately $74,100 for administrative  overhead
attributable to operating such properties during 2003.

The  terms of the above transactions are similar to ones, which would  have
been  obtained  through arm's length negotiations with  unaffiliated  third
parties.

Item 14.  Principal Accountant Fees and Services

The following table presents fees for professional audit services rendered
by KPMG, LLP for the audit of the Partnership's annual financial statements
for the years ended December 31, 2003 and 2002 and fees billed for other
services rendered by KPMG during those periods.

 For the Year Ended December    2003
             31,                         2002

Audit Fees                     $8,893    $
                                         4,763
Audit Related Fees                  -         -
Tax Fees                            -
                                         -
All Other Fees                      -
                                         -

    TOTAL                      $8,893    $
                                         4,763

The  Audit Committee of the Managing General Partner reviewed and approved,
in advance, all audit and non-audit services provided by KPMG, LLP.



<PAGE>
                                 Part IV


Item 15.  Exhibits, Financial Statement Schedules and Reports on Form 8-K

          (a)(1)  Financial Statements:

                  Included in Part II of this report -

                  Independent Auditors Report
                  Balance Sheets
                  Statements of Operations
                  Statement of Changes in Partners' Equity
                  Statements of Cash Flows
                  Notes to Financial Statements

                     (2)  Schedules required by Article 12 of Regulation S-
                  X  are either omitted because they are not applicable  or
                  because  the  required  information  is  shown   in   the
                  financial statements or the notes thereto.

             (3)  Exhibits:

                                      4      (a)   Certificate  of  Limited
                          Partnership  of Southwest Royalties Institutional
                          Income  Fund X-B, L.P., dated November 27,  1990.
                          (Incorporated  by  reference  from  Partnership's
                          Form 10-K for the fiscal year ended December  31,
                          1990.)

                                            (b)    Agreement   of   Limited
                          Partnership  of Southwest Royalties Institutional
                          Income  Fund X-B, L.P. dated November  27,  1990.
                          (Incorporated  by  reference  from  Partnership's
                          Form 10-K for the fiscal year ended December  31,
                          1991.)

          31.1 Rule 13a-14(a)/15d-14(a) Certification
          31.2 Rule 13a-14(a)/15d-14(a) Certification
           32.1  Certification of Chief Executive Officer  Pursuant  to  18
U.S.C. Section 1350, as
              adopted Pursuant to Section 906 of the Sarbanes-Oxley Act  of
2002
           32.2  Certification of Chief Financial Officer  Pursuant  to  18
U.S.C. Section 1350, as
              adopted Pursuant to Section 906 of the Sarbanes-Oxley Act  of
2002

          (b)     Reports on Form 8-K

                   There  were  no  reports filed on Form  8-K  during  the
              quarter ended December 31, 2003.
<PAGE>
                                Signatures


Pursuant  to  the  requirements of Section 13 or 15(d)  of  the  Securities
Exchange  Act  of 1934, the Partnership has duly caused this report  to  be
signed on its behalf by the undersigned, thereunto duly authorized.


                          Southwest Royalties Institutional Income
                          Fund X-B, L.P., a Delaware limited partnership


                                        By:    Southwest  Royalties,  Inc.,
                                 Managing
                                   General Partner


                          By:    /s/ H. H. Wommack, III
                                 ------------------------------------------
-----
                                           H. H. Wommack, III, President


                          Date:  May 12, 2004

<PAGE>
In  accordance with the Exchange Act, this report has been signed below  by
the following persons on behalf of the Registrant and in the capacities and
on the dates indicated.

/s/ H. H. Wommack, III                       /s/ Bill E. Coggin
---------------------------                  ------------------------
--------------------                         -----------------------
H.    H.   Wommack,    III,                  Bill      E.     Coggin,
Chairman of the Board,                       Executive Vice President
President,   Director   and                  and    Chief   Financial
Chief Executive Officer                      Officer

Date:     May 12, 2004                       Date:     May 12, 2004


/s/ William P. Nicoletti                     /s/ James N. Chapman
---------------------------                  ------------------------
--------------------                         -----------------------
William    P.    Nicoletti,                  James     N.    Chapman,
Director                                     Director

Date:     May 10, 2004                       Date:     May 12, 2004


/s/ Richard D. Rinehart                      /s/  Joseph J.  Radecki,
                                             Jr.
---------------------------                  ------------------------
--------------------                         -----------------------
Richard     D.    Rinehart,                  Joseph J. Radecki,  Jr.,
Director                                     Director

Date:     May 12, 2004                       Date:     May 12, 2004


/s/  Herbert C. Williamson,
III
---------------------------                  ------------------------
--------------------                         -----------------------
Herbert C. Williamson, III,                  John M. White, Director
Director

Date:     May 11, 2004                       Date:




<PAGE>
                   SECTION 302 CERTIFICATION                Exhibit 31.1


I, H.H. Wommack, III, certify that:

1.   I have reviewed this annual report on Form 10-K of Southwest Royalties
Institutional Income Fund X-B, L.P.

2.Based  on my knowledge, this report does not contain any untrue statement
  of  a  material fact or omit to state a material fact necessary  to  make
  the  statements  made,  in light of the circumstances  under  which  such
  statements  were made, not misleading with respect to the period  covered
  by this report;

3.Based  on  my  knowledge, the financial statements, and  other  financial
  information  included  in  this report, fairly present  in  all  material
  respects  the financial condition, results of operations and  cash  flows
  of the registrant as of, and for, the periods presented in this report;

4.The  registrant's other certifying officer(s) and I are  responsible  for
  establishing  and  maintaining disclosure  controls  and  procedures  (as
  defined  in  Exchange  Act  Rules 13a-15(e) and  15-15(e))  and  internal
  control  over financial reporting (as defined in Exchange Act Rules  13a-
  15(f) and 15d-15(f) for the registrant and have:

  a)Designed  such  disclosure  controls and  procedures,  or  caused  such
     disclosure   controls  and  procedures  to  be  designed   under   our
     supervision,  to  ensure  that material information  relating  to  the
     registrant, including its consolidated subsidiaries, is made known  to
     us  by others within those entities, particularly during the period in
     which this report is being prepared;

  b)Designed  such  internal control over financial  reporting,  or  caused
     such  internal  control over financial reporting to be designed  under
     our   supervision,  to  provide  reasonable  assurance  regarding  the
     reliability  of financial reporting and the preparation  of  financial
     statements for external purposes in accordance with generally accepted
     accounting principles;

  c)Evaluated  the  effectiveness of the registrant's  disclosure  controls
     and  procedures and presented in this report our conclusions about the
     effectiveness of the disclosure controls and procedures, as of the end
     of the period covered by this report based on such evaluation; and

  d)Disclosed  in  this  report  any change in  the  registrant's  internal
     control over financial reporting that occurred during the registrant's
     most recent fiscal quarter (the registrant's fourth fiscal quarter  in
     the  case  of  an annual report) that has materially affected,  or  is
     reasonably  likely  to  materially affect, the  registrant's  internal
     control over financial reporting; and

5.The  registrant's other certifying officer(s) and I have disclosed, based
  on  our  most  recent  evaluation  of  internal  control  over  financial
  reporting,  to  the  registrant's auditors and  the  audit  committee  of
  registrant's  board  of directors (or persons performing  the  equivalent
  functions):

  a)All  significant deficiencies and material weaknesses in the design  or
     operation   of  internal  controls  over  financial  reporting   which
     reasonably  likely  to  adversely affect the registrant's  ability  to
     record, process, summarize and report financial information; and

  b)Any  fraud, whether or not material, that involves management or  other
     employees  who  have  a significant role in the registrant's  internal
     controls over financial reporting.


Date:  May 12, 2004                /s/ H.H. Wommack, III
                                   H. H. Wommack, III
                                    Chairman, President and Chief Executive
Officer
                                   of Southwest Royalties, Inc., the
                                   Managing General Partner of
                                   Southwest Royalties Institutional Income
Fund X-B, L.P.



<PAGE>
                   SECTION 302 CERTIFICATION                Exhibit 31.2


I, Bill E. Coggin, certify that:

1.   I have reviewed this annual report on Form 10-K of Southwest Royalties
Institutional Income Fund X-B, L.P.

2.Based  on my knowledge, this report does not contain any untrue statement
  of  a  material fact or omit to state a material fact necessary  to  make
  the  statements  made,  in light of the circumstances  under  which  such
  statements  were made, not misleading with respect to the period  covered
  by this report;

3.Based  on  my  knowledge, the financial statements, and  other  financial
  information  included  in  this report, fairly present  in  all  material
  respects  the financial condition, results of operations and  cash  flows
  of the registrant as of, and for, the periods presented in this report;

4.The  registrant's other certifying officer(s) and I are  responsible  for
  establishing  and  maintaining disclosure  controls  and  procedures  (as
  defined  in  Exchange  Act  Rules 13a-15(e) and  15-15(e))  and  internal
  control  over financial reporting (as defined in Exchange Act Rules  13a-
  15(f) and 15d-15(f) for the registrant and have:

  a)Designed  such  disclosure  controls and  procedures,  or  caused  such
     disclosure   controls  and  procedures  to  be  designed   under   our
     supervision,  to  ensure  that material information  relating  to  the
     registrant, including its consolidated subsidiaries, is made known  to
     us  by others within those entities, particularly during the period in
     which this report is being prepared;

  b)Designed  such  internal control over financial  reporting,  or  caused
     such  internal  control over financial reporting to be designed  under
     our   supervision,  to  provide  reasonable  assurance  regarding  the
     reliability  of financial reporting and the preparation  of  financial
     statements for external purposes in accordance with generally accepted
     accounting principles;

  c)Evaluated  the  effectiveness of the registrant's  disclosure  controls
     and  procedures and presented in this report our conclusions about the
     effectiveness of the disclosure controls and procedures, as of the end
     of the period covered by this report based on such evaluation; and

  d)Disclosed  in  this  report  any change in  the  registrant's  internal
     control over financial reporting that occurred during the registrant's
     most recent fiscal quarter (the registrant's fourth fiscal quarter  in
     the  case  of  an annual report) that has materially affected,  or  is
     reasonably  likely  to  materially affect, the  registrant's  internal
     control over financial reporting; and

5.The  registrant's other certifying officer(s) and I have disclosed, based
  on  our  most  recent  evaluation  of  internal  control  over  financial
  reporting,  to  the  registrant's auditors and  the  audit  committee  of
  registrant's  board  of directors (or persons performing  the  equivalent
  functions):

  a)All  significant deficiencies and material weaknesses in the design  or
     operation   of  internal  controls  over  financial  reporting   which
     reasonably  likely  to  adversely affect the registrant's  ability  to
     record, process, summarize and report financial information; and

  b)Any  fraud, whether or not material, that involves management or  other
     employees  who  have  a significant role in the registrant's  internal
     controls over financial reporting.


Date:  May 12, 2004                /s/ Bill E. Coggin
                                   Bill E. Coggin
                                   Executive Vice President
                                   and Chief Financial Officer of
                                   Southwest Royalties, Inc., the
                                   Managing General Partner of
                                   Southwest Royalties Institutional Income
Fund X-B, L.P.



<PAGE>

           CERTIFICATION PURSUANT TO               Exhibit 32.1
                          19 U.S.C. SECTION 1350,
                          AS ADOPTED PURSUANT TO
               SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002


       In   connection  with  the  Annual  Report  of  Southwest  Royalties
Institutional Income Fund X-B, L.P. (the "Company") on Form  10-K  for  the
period  ending December 31, 2003 as filed with the Securities and  Exchange
Commission  on the date hereof (the "Report"), I, H.H. Wommack, III,  Chief
Executive Officer of the Managing General Partner of the Company,  certify,
pursuant  to 18 U.S.C.  1350, as adopted pursuant to  906 of the  Sarbanes-
Oxley Act of 2002, that:

     (1)  The Report fully complies with the requirements of section 13(a) or
       15(d) of the Securities Exchange Act of 1934; and

     (2)   The information contained in the Report fairly presents, in  all
       material respects, the financial condition and
 results of operation of the
       Company.


Date:  May 12, 2004




/s/ H.H. Wommack, III
H. H. Wommack, III
Chairman, President, Director and Chief Executive Officer
  of Southwest Royalties, Inc., the
  Managing General Partner of
  Southwest Royalties Institutional Income Fund X-B, L.P.

<PAGE>
              CERTIFICATION PURSUANT TO               Exhibit 32.2
                          19 U.S.C. SECTION 1350,
                          AS ADOPTED PURSUANT TO
               SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002


  In connection with the Annual Report of Southwest Royalties Institutional
Income  Fund  X-B, L.P. (the "Company") on Form 10-K for the period  ending
December  31, 2003 as filed with the Securities and Exchange Commission  on
the  date hereof (the "Report"), I, Bill E. Coggin, Chief Financial Officer
of  the  Managing General Partner of the Company, certify, pursuant  to  18
U.S.C.   1350,  as  adopted pursuant to  906 of the Sarbanes-Oxley  Act  of
2002, that:

     (1)  The Report fully complies with the requirements of section 13(a) or
       15(d) of the Securities Exchange Act of 1934; and

     (2)   The information contained in the Report fairly presents, in  all
       material respects, the financial condition and
 results of operation of the
       Company.


Date:  May 12, 2004




/s/ Bill E. Coggin
Bill E. Coggin
Executive Vice President
  and Chief Financial Officer of
  Southwest Royalties, Inc., the
  Managing General Partner of
  Southwest Royalties Institutional Income Fund X-B, L.P.


<PAGE>