Abstract:
A single conduit lift pump is disclosed that only requires a single fluid conduit for both the driving fluid and the pumping action of the pump in a well bore. Fluid pressure communicated to the pump by the single fluid conduit drives the pump to load a resilient member. The fluid pressure is cycled off to allowing the lift of fluid by action of the resilient member upon the single fluid conduit. The single fluid conduit makes this pump suitable for downhole operations for the oil and gas production industries in wells that have substantial water cut that inhibits the production of gas.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS  
       [0001]     This is non-provisional of U.S. Patent Application Ser. No. 60/595,958, filed 19 Aug. 2005, which is incorporated herein by reference in its entirety and to which priority is claimed. 
     
    
     FIELD OF THE INVENTION  
       [0002]     The present invention relates to a pump system to remove fluids from a well; specifically, to a suspended single conductor pump located in a well bore that is connected to a surface pump that pumps fluid down the single conductor to energize the pump. Upon termination of the surface pump pressure, resilient forces in the subsurface single conductor pump move the fluid out of the well bore to the surface.  
       BACKGROUND OF THE INVENTION  
       [0003]     Pneumatically or hydraulically powered pumps have been in use for many years by varying industries. In particular, pneumatically or hydraulically powered pumps have found widespread uses in the chemical, petroleum, petrochemical, general industrial, agricultural, and residential areas. The typical operation of a hydraulic or pneumatic pump is to expand a diaphragm or other expandable chamber using compressed air or fluid such that the fluid is expelled as the chamber expands causing a pumping action. In partially depleted oil and gas wells, the flow of liquids into the well bore often causes the well to cease flowing under its own pressure, due to the hydrostatic weight of the fluid it is attempting to produce. It is estimated that approximately twenty-five percent of oil and gas reserves, remain after these wells stop flowing under their own pressure. In order to increase production rates of a given well, the flowing bottom hole pressure must be reduced. This reduced flowing bottom hole pressure will increase the pressure differential between the formation and the well bore which will accelerate the migration of oil and gas to the well bore. If the non-flowing or liquid loaded well can have it&#39;s liquids lifted, much of the remaining oil and gas can be recovered and the well will not be required to be plugged and abandoned, which requires substantial effort and expense.  
       SUMMARY OF THE PRESENT DISCLOSURE  
       [0004]     A fluid transport or fluid lift pump apparatus includes a first enclosed body forming a driving piston chamber, divided by a sealed first piston head into a first fluid chamber having a fluid port and a first resistance chamber; a second enclosed body forming an accumulator chamber, divided by a sealed second piston head into a second fluid chamber and a second resistance chamber, the second fluid chamber having a fluid ingress port and a fluid egress port; a piston rod rigidly connecting the first piston head and second piston head; an ingress check valve in communication with the fluid ingress port, permitting flow into the second fluid chamber; and an egress check valve in communication with the fluid egress port and the fluid port, permitting flow out of the second fluid chamber. The first resistance and the second resistance chambers can either or both contain pressurized fluid such as nitrogen. The first resistance chamber can also include a first resistance fluid port and the second resistance chamber includes a second resistance fluid port. A spring may be used within the first or second resistance chamber or in both chambers to provide restoration charging position. A conduit having a first and second end, force to move the piston to the second end in communication with the fluid port and the egress check valve can be used to allow fluid to be drawn from the well to the surface to remove a hydrostatic head from a mature oil and gas well. A 3-way valve in communication with the first end of the conduit can be used on the surface to switch the single conduit from flowing into the well to flowing out of the well or into a tank farm for storage.  
         [0005]     In one embodiment, a fluid lift pump for transporting fluid is assembled by combining a driving chamber having an expansion means therein and a fluid port; an accumulation chamber having an expansion means therein, an ingress port, and an egress port; a means for connecting the driving chamber and accumulation chamber such that an expansion of the driving chamber causes an expansion of the accumulation chamber; an ingress means in communication with the ingress port for allowing fluid to the accumulation chamber while not allowing fluid to exit the accumulation chamber; and an egress means in communication with the egress port and the fluid port for allowing fluid to exit the accumulation chamber while not allowing fluid to enter the accumulation chamber.  
         [0006]     In another embodiment, a single port fluid lift pump includes a first enclosed body forming a driving chamber, divided by a sealed first piston head into a first fluid chamber having a single fluid port and a first resistance chamber; a second enclosed body forming an accumulator chamber, divided by a sealed second piston head into a second fluid chamber, having a fluid ingress port and a fluid egress port, and a second resistance chamber; a piston rod rigidly connecting the first piston head and second piston head; an ingress check valve operably connected to the fluid ingress port, permitting flow into the second fluid chamber; and an egress check valve operably connected to the fluid egress port, and in communication with the fluid port, permitting flow out of the second fluid chamber.  
         [0007]     A method of removing or transporting fluid from a well can be accomplished by providing a first enclosed body forming a driving chamber, divided by a sealed first piston head into a first fluid chamber having a fluid port and a first resistance chamber; providing a second enclosed body forming an accumulator chamber, divided by a sealed second piston head into a second fluid chamber, having a fluid ingress port and a fluid egress port, and a second resistance chamber; operably connecting the first piston head to the second piston head; operably connecting an ingress check valve to the fluid ingress port to permit flow into the second fluid chamber; operably connecting an egress check valve to be in communication with the fluid egress port and the fluid port to permit flow out of the second fluid chamber; placing the ingress check valve in communication with a fluid to be transported; displacing the first piston from its natural position to enlarge the first fluid chamber and the second fluid chamber; and allowing the first piston to return to its natural position.  
         [0008]     Similarly, a method of increasing well production can be accomplished by connecting one end of a conduit to a valve in communication with a pressurized fluid source; connecting the opposite end of the conduit to a single port fluid lift pump; inserting the single the conduit; and releasing port fluid lift pump into a fluid reservoir within a well; pressurizing the pressure within the conduit.  
         [0009]     Alternatively, a method of pumping fluid from a well connecting one end of a fluid transport means to a valve in I can be performed by communication with a pressurized fluid source; connecting the opposite end of the fluid transport means to a single port fluid lift means; inserting the fluid lift means into a fluid reservoir; pressurizing the fluid transport means; and releasing the pressure within the fluid transport means.  
         [0010]     In one embodiment, a lift pump can also be provided by combining a sealed driving piston connected to a single fluid conductor reactive to hydraulic force applied on the single fluid conductor; a pumping piston having a fluid ingress port connected to an exterior of the pump and a fluid egress port connected to the single fluid conductor; a connector between the driving piston and the pumping piston responsively moving the pumping piston as the sealed driving piston is filled with fluid to move fluid into the pumping piston from the ingress port; and, a resilient chamber causing the pumping piston to move fluid out of the egress port into the single fluid conductor when hydraulic force is no longer applied on the single fluid conductor.  
         [0011]     This type of pump is charged and operated by installing the single conduit pump in a well bore in a well to a desired point below the surface; placing a C-clamp connector on the pump, which is connected to a source of nitrogen, in order to charge the resilient chamber; and connecting a conduit to the proximal end of the pump and lowering the pump into the well production zone. Alternatively, the single conduit pump could be connected to the conduit and installed in the wellhead to a point allowing the operator to charge the pump with a compressible gas such as nitrogen, then lowered down the well bore into the fluid production zone of the well.  
         [0012]     A method for producing liquids from a well bore with a single conduit pump can be accomplished by the steps of inserting the pump assembly to the production zone; enabling the surface motor to pressurize the single conduit with fluid on a cyclical basis; and, adjusting the valves of the surface collection assembly to cycle consistent with the pump cycle.  
         [0013]     The fluid transport apparatus and single conduit pump of the present disclosure can accelerate recovery of hydrocarbons, reduce the abandonment pressure, and increase the total cumulative production. The single conduit pump uses the single conduit or tube as both the power input conduit and the produced fluid output conduit utilizing no vents to lift the liquids from the production zone and thereby enhance the production rate of the well.  
         [0014]     The single conduit pump system is hung rather than seated in a pre-existing seat. Thus, the single conduit pump eliminates the need for multiple conduits to permit the flow of fluids to the surface. Since the pump is inserted on a single conduit into the well bore, the deployment of the pump may be done without substantial expensive equipment typically used for most pump deployment systems. The cost of both deployment and for the pump and conduit are therefore substantially less than the cost of prior pump systems. 
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0015]      FIG. 1  is a diagram of an embodiment of a fluid transport apparatus or system having a single conduit pump according to certain teachings of the present disclosure.  
         [0016]      FIG. 2  is a schematic diagram of one embodiment of a single conduit pump with a sealed resilient chamber.  
         [0017]      FIG. 3  is a schematic diagram of another embodiment of a single conduit pump where a resilient chamber is exposed to a fluid to be pumped.  
         [0018]      FIG. 4  is a schematic diagram of an alternative embodiment of a single conduit pump where a resilient chamber is inverted.  
         [0019]      FIG. 5  is a mechanical diagram of an additional embodiment of a single conduit pump.  
         [0020]      FIGS. 6A-6E  are enlarged views of  FIG. 5  showing additional detail.  
         [0021]      FIG. 7  is a cross-section through the line  7 - 7  of the diagram of  FIG. 5 .  
         [0022]      FIG. 8  is a cross-section through the line  8 - 8  of the diagram of  FIG. 5 . 
     
    
     DETAILED DESCRIPTION  
       [0023]      FIG. 1  shows an embodiment of a fluid transport apparatus or system  100  having a single conduit pump  110  according to certain teachings of the present disclosure. The single conduit pump  110  can be inserted into an oil or gas well  120 . The single conduit pump can be inserted and suspended by a tube  125  connecting the single conduit pump  110  to the surface. The single conduit pump  110  can be submersed into fluid  115  at the bottom of the oil or gas well  120 . This fluid  115  is typically oil, water, or a mixture thereof but can consist of any type of fluid.  
         [0024]     The tube  125  typically used to connect the improved water cut lift pump  110  to the surface equipment can be connected to a three-way solenoid valve  130 . The three-way valve  130  can be operated by the controller  150  such that in one position, the tube  125  connected to the single conduit pump  110  is in communication with the liquid tank  165  via pump or compressor  155  and line  160 . In the opposite position, the three-way valve  130  can perform the function of placing the tube  125  connected to the single conduit pump  110  in communication with the produced fluid reservoir  140  via line  135 . The three-way valve  130  is not to be construed as limited to only that configuration. Any other configuration that performs the same function can be used with the system  100 . For example, two valves and appropriate piping could perform an identical function. In addition, control valves can be used if desired. Controller  150  can be any type of controller for actuating a solenoid valve that is known in the art including, but not limited to, pneumatic or electrically actuated. Line  145  can be any type of transmission line that is suitable for the operation of controller  150 . For example, in the case of an electrical controller, line  145  can be a wire. In the case of a pneumatic controller, the line  145  can be a pipe or tube.  
         [0025]     The system  100  shown in  FIG. 1  can operate to pump fluid  115  from the bottom of the well  120 . While single conduit pump  110  is filling with fluid  115  from the bottom of well  120 , the three-way valve  130  is actuated such that liquid tank  165  is in communication with the tube  125 . This allows pump  155  to apply force to the piston in the single conduit pump  110  thus filling pump  110  with fluid  115  from the bottom of the well  120 . Once controller  150  detects that pump  110  has pumped its prescribed displacement volume with fluid  115 , the controller  150  will send a signal via line  145  to the three-way valve  130  placing the tube  125  in communication with the produced fluid reservoir  140 . The change in the position of the three-way valve  130  will allow the single conduit pump  110  to pump fluid  115  from the bottom of the well  120  into the produced fluid reservoir  140  via the tube  125  and line  135 . Once no more fluid is being produced to the produced fluid reservoir  140 , the controller will actuate the three-way valve and the process can repeat itself.  
         [0026]      FIG. 2  depicts a schematic of one embodiment of an single conduit pump  200 . A conduit or tube  205  is attached to the first end of a single fluid conductor  220  by connector  210 . The single fluid conductor  220  is also connected to the fluid egress port  290  via fluid egress check valve  295  and line  215 . The second end of the single fluid conductor  220  is connected to the upper chamber  222  of the sealed driving piston  235 . The sealed driving piston  235  also contains a lower chamber  240  separated from the upper chamber  222  by driving piston head  225  and dynamic seal  230 . The driving piston head  225  is connected to the pumping piston head  270  by piston rod  245  through seal  250 . The seal  250  can consist of a rigid wall with a seal around the piston rod  245  or a seal separating the driving piston  235  from the pumping piston  275 .  
         [0027]     The pumping piston  275  has an inlet port  260  in communication with an inlet check valve  255  allowing fluid to enter the pumping chamber  262 . Pumping piston  275  also has an egress port  290  in communication with an egress check valve  295  allowing fluid to exit the pumping chamber  262 . Pumping chamber  262  is separated from the resilient chamber  280  by pumping piston head  270  and dynamic seal  265 . Resilient chamber  280  further contains a spring or other elastic medium  285 . In addition, resilient chamber  280  may also include a pressurized gas charge.  
         [0028]     Additional check valves  296  and  256  can be included to allow gas lock occurring in chamber  262  to be overcome by pumping additional fluid down conductor  205  at a substantially higher pressure than experienced by check valves  295  and  255 . This additional pressure would drive fluid into chamber  262  and any entrained gas bubble out valve  256  thereby restoring the pump to full operating capacity.  
         [0029]     In operation, the single conduit pump  200  in  FIG. 2  only requires a single tube from the top of the well to the pump but is still able to pump effectively and in the case of a gas well, allows the gas to flow up the annulus formed around the single tube and the production casing or production tubing. Fluid is pumped down the conduit  205  and through connector  210  to fill the single fluid conductor  220  and line  215 . Egress check valve  295  prevents fluid from entering the pumping piston from the tube. As fluid continues to pump down the tube and through single fluid conductor  220  into the upper driving piston chamber  222 , the driving piston head  225  moves downward pushing the pumping piston head  270  downward. As the pumping piston head  270  moves downward, fluid from the well enters the pumping chamber  262  through ingress check valve  255  and ingress port  260 . This continues until the force being exerted by the fluid pressure on the driving piston head  225  is equal the force being exerted by the resilient chamber  280  on the pumping piston head  270 . At this point, additional fluid being pumped by the conduit  205  has no further effect unless the pressure is increased. Once the pumping chamber is filled or at least partially filled, the pressure on the conduit  205  can be released by a controller on the surface. At this point, the resilient chamber is exerting a much greater force on the pumping piston head  270  than being exerted on the driving piston head  225 . The ingress check valve  255  prevents fluid from exiting the pumping chamber  262  via the ingress port  260 . The only exit for the fluid is through egress port  290  and egress check valve  295  via line  215 . As fluid is pushed out of the pumping chamber  262 , it is forced into the single conductor  220  and up the conduit  205 .  
         [0030]     The volume of one input cycle will be substantially less than the volume of one output cycle since the driving piston has a much smaller volume than the pumping piston. By way of multiple repetitions, eventually this system will be full, from bottom to top with only produced fluid from the well, save and except for a small volume from the surface pump to the 3-way valve, which will only contain the surface pumping fluid.  
         [0031]      FIG. 3  depicts a schematic of another embodiment of an single conduit pump  300 .  FIG. 3  is very similar to  FIG. 2  with only minor differences. A conduit  305  is attached to the first end of a single fluid conductor  320  by connector  310 . The single fluid conductor  320  is also connected to the fluid egress port  390  via fluid egress check valve  395  and line  315 . The second end of the single fluid conductor  320  is connected to the upper chamber  322  of the sealed driving piston  335 . The sealed driving piston  335  also contains a lower chamber  340  separated from the upper chamber  322  by driving piston head  325  and dynamic seal  330 . The driving piston head  325  is connected to the pumping piston head  370  by piston rod  345  through seal  350 . The seal  350  can consist of a rigid wall with a seal around the piston rod  345  or a seal separating the driving piston  335  from the pumping piston  375 .  
         [0032]     The pumping piston check valve  355  allowing fluid  375  has an inlet port  360  in communication with an inlet to enter the pumping chamber  362 . Pumping piston  375  also has an egress port  390  in communication with an egress check valve  395  allowing fluid to exit the pumping chamber  362 . Pumping chamber  362  is separated from the resilient chamber  380  by pumping piston head  370  and dynamic seal  365 . Resilient chamber  380  further contains a spring or other elastic medium  385 . In addition, resilient chamber  380  can include a port  382  allowing the fluid to be pumped to fill the resilient chamber such that the pressure at the bottom of the well can be used as a portion of the elastic medium for the resilient chamber  380 .  
         [0033]     In operation, the single conduit pump  300  in  FIG. 3  only requires a single conduit  305  from the top of the well to the pump  300  but is still able to pump effectively. Fluid is pumped down conduit  305  and through connector  310  to fill single fluid conductor  320  and line  315 . Egress check valve  395  prevents fluid from entering the pumping piston from the conduit  305 . As fluid continues to pump down the conduit  305  and through single fluid conductor  320  into the upper driving piston chamber  322 , the driving piston head  325  moves downward pushing the pumping piston head  370  downward. As the pumping piston head  370  moves downward, fluid from the well enters the pumping chamber  362  through ingress check valve  355  and ingress port  360 . This continues until the force being exerted by the fluid pressure on the driving piston head  325  is equal the force being exerted by the resilient chamber  380  on the pumping piston head  370 . At this point, additional fluid being pumped by the conduit  305  has no further effect unless the pressure is increased. Once the pumping chamber is filled or at least partially filled, the pressure on the conduit  305  can be released by a controller on the surface. At this point, the resilient chamber is exerting a much greater force on the pumping piston head  370  than being exerted on the driving piston head  325 . The ingress check valve  355  prevents fluid from exiting the pumping chamber  362  via the ingress port  360 . The only exit for the fluid is through egress port  390  and egress check valve  395  via line  315 . As fluid is pushed out of the pumping chamber  362 , it is pushed into the single conductor  320  and up the conduit  305 .  
         [0034]      FIG. 4  depicts a schematic of another embodiment of an single conduit pump  400 .  FIG. 4  is similar to  FIGS. 2 and 3 , but the resilient chamber is part of the driving piston and a weight is used to supplement the resistance. A conduit  405  is attached to the first end of a single fluid conductor  420  by connector  410 . The single fluid conductor  420  is also connected to the fluid egress port  490  via fluid egress check valve  495  and line  415 . The second end of the single fluid conductor  420  is connected to the lower chamber  422  of the sealed driving piston  435 . The sealed driving piston  435  also contains an upper resilient chamber  440  separated from the lower chamber  422  by driving piston head  425  and dynamic seal  430 . Resilient chamber  440  further contains a spring or other elastic medium  442 . In addition, resilient chamber  440  may also include a pressurized gas charge. One alternative could use the bottom hole pressure as used in  FIG. 3  as an additional force aid. The driving piston head  425  is connected to the pumping piston head  470  by piston rod  445  through seal  450 . The seal  450  can consist of a rigid wall with a seal around the piston rod  445  or a seal separating the driving piston  435  from the pumping piston  475 .  
         [0035]     The pumping piston  475  has an inlet port  460  in communication with an inlet check valve  455  allowing fluid to enter the pumping chamber  462 . Pumping piston  475  also has an egress port  490  in communication with an egress check valve  495  allowing fluid to exit the pumping chamber  462 . Pumping chamber  462  is separated from the resilient chamber  480  by pumping piston head  470  and dynamic seal  465 . The resilient chamber  480  in this embodiment includes a port  482  open to the fluid in the bottom of the well. This allows the pressure at the bottom of the well to be used as an additional force aid to pump the fluid to the surface on the pumping stroke. In addition, other resilient means such as a spring could be utilized in resilient chamber  480 . The embodiment of  FIG. 4  further includes a weight  485  connected to the pumping piston head  470  by the weight piston rod  489 . The weight is outside the pumping piston chamber and the weight piston rod protrudes through the wall of the pumping piston  470  and is sealed by seal  487 .  
         [0036]     In operation, the single conduit pump  400  of  FIG. 4  only requires a single conduit  405  from the top of the well to the pump but is still able to pump effectively. Fluid is pumped down the conduit  405  and through connector  410  to fill single fluid conductor  420  and line  415 . Egress check valve  495  prevents fluid from entering the pumping piston from the conduit  405 . As fluid continues to pump down the conduit  405  and through single fluid conductor  420  into the lower driving piston chamber  422 , the driving piston head  425  moves upward, pushing the pumping piston head  470  upward. As the pumping piston head  470  moves upward, fluid from the well enters the pumping chamber  462  through ingress check valve  455  and ingress port  460 . This continues until the force being exerted by the fluid pressure on the driving piston head  425  is equal the forces being exerted against the driving piston head or until a pre-defined volume has been pumped via the surface controller. These forces include the force exerted downward by the resilient chamber  440  on the driving piston head  425 , the force being exerted downward on the pumping piston head  470  by the resilient chamber  480 , and the force being exerted downward by the weight  485  on the pumping piston. At this point, additional fluid being supplied by the conduit  405  has no further effect unless the pressure is increased. Once the pumping chamber is filled or at least partially filled, the pressure on the conduit  405  can be released by a controller on the surface. At this point, the resilient chamber  440 , the resilient chamber  480 , and the weight  485  are exerting a much greater force downward on the driving piston head  425  than being exerted upward on the driving piston head  425  by the pumping piston head  470 . The ingress check valve  455  prevents fluid from exiting the pumping chamber  462  via the ingress port  460 . The only exit for the fluid is through egress port  490  and egress check valve  495  via line  415 . As fluid is pushed out of the pumping chamber  462 , it is pumped into the single conductor  420  and up the conduit  405 .  
         [0037]      FIG. 5  depicts a mechanical drawing of another embodiment of a single conduit lift pump  500  according to the present disclosure.  FIGS. 6A-6E  depict enlarged sections of the pump  500  of  FIG. 5  utilizing the same numbering scheme. The embodiment of the pump  500  in  FIG. 5  contains many of the features shown in the embodiment of  FIG. 4 , but represents a departure from the prior described embodiments of the pump. In  FIG. 5 , a conduit  505  is attached to the first end of a single fluid conductor  520  by connector  510 . The single fluid conductor  520  is also connected to the fluid egress port  590  via lower chamber  522  of sealed driving piston  535 . The lower chamber  522  is further in communication with fluid egress check valve  595  via line  515 .  
         [0038]     The sealed driving piston  535  also contains an upper chamber  540  separated from the lower chamber  580  by driving piston head  525 , piston rod  545  and dynamic seal  530 . Chamber  540  contains a pressurized gas charge. The driving piston head  525  is connected to the pumping piston head  570  by piston rod  545  through seal  550 . The seal  550  can consist of a rigid wall with a seal around the piston rod  545  or a seal separating the driving piston  535  from the pumping piston  575 . A charge of gas, such as nitrogen, is maintained on upper chamber  540  from reservoir  541  that is charged at the surface in preparation of lowering the pump  500  into the well through a port, more clearly shown in  FIG. 7  at cross-sectional area  7 - 7  of  FIG. 5 . Upon charging reservoir  541  with a pressurized gas, plug  542  is screwed into place as shown in  FIG. 6A . Upon installing plug  542 , pump body cap  517  is screwed into place. After pump body cap  517  is installed, the pump can be fully charged into the well to commence operations.  
         [0039]     The gas is charged through gas charge port  543  while plug  542  is unscrewed (not shown). Upon achieving the desired pressure in reservoir  541 , the plug  542  is screwed into place to seal the reservoir and maintain the pressure. Upon charging reservoir  541  and screwing plug  542  into place, the pump body cap  517  is screwed into position, and the pump lowered into the well, before pumping operations can commence.  
         [0040]     The depth of the well and the physical characteristics of the fluid (brine) to be lifted from the well are measure by methods well known to those skilled in this art. Accordingly, the reservoir  541  may be made shorter or longer to provide sufficient gas pressure on upper chamber  540  to drive the piston head  525  in the recharge phase of the pump. Lower chamber  522  contains an enlarged cavity  523  adjacent to driving piston head  525  to allow the fluid entering through single fluid conductor  520  to more easily displace driving piston head  525 . Relieving the hydrostatic head on the single conduit  505  by action of the pump ( 155 ;  FIG. 1 ) at the surface, permits the lift of the fluid from the well to the surface.  
         [0041]     The pumping piston  575  has an inlet port  560  (more clearly shown in  FIG. 8 ) in communication with an inlet check valve  555  (not shown on drawing, although approximate location labeled) allowing fluid to enter the pumping chamber  562  through screen  585  and cavity  564 . Bull nose plug  586  closes the bottom of the pump  500  and prevents debris in the wellbore  120  from clogging pump  500 . Pumping piston  575  also has an egress port  590  in communication with an egress check valve  595  allowing fluid to exit the pumping chamber  562  through line  515 , lower chamber  522 , single fluid conductor  520 , and conduit  505 . The pumping chamber  562  is separated from the chamber  580  by pumping piston head  570  and dynamic seal  565 . The chamber  580  has openings  582  to communicate with the environment outside the pump  500 . In addition, other resilient means such as a spring or pressurized gas charge could be utilized in chamber  580 .  
         [0042]     Installation of the single conduit pump  500  is typically performed by installing a substantial portion of the pump  500  into the oil or gas well  120 . This is typically done because the pump  500  can be extremely long an unwieldy, depending on the well characteristics and the sizes of the various chambers and reservoirs. Typically, the pump is installed in the well  120  to approximately the clamping point  518 , a shoulder on the proximal end of the charging chamber. The clamping point allows an operator to temporarily clamp the pump to prevent further movement into the well bore, yet allow access to the charging port  543 .  
         [0043]     Upon installing the pump  500  into well  120  up to clamping point  543 , the gas is charged into reservoir  541  through gas charge port  543  while plug  543  is only partially screwed into place. Plug  542  must initially be installed to prevent gas leakage but allow charging of gas through gas charge port  543 . Upon obtaining the desired pressure in reservoir  541 , plug  542  is fully screwed into place to seal off gas charge port  543 . Upon gas charge port  543  being sealed, the gas charge can be removed and the pump body cap  517  can be installed. Once this is completed, the pump  500  can be fully installed into the well  120 .  
         [0044]     In operation, the single conduit pump  500  of  FIG. 5  only requires a single conduit  505 . Fluid is pumped down the conduit  505  and through connector  510  to fill the single fluid conductor  520 , lower chamber  522 , and line  515  up to check valve  595 . Egress check valve  595  prevents fluid from entering the pumping piston from the conduit  505 . As fluid continues to pump down the conduit  505  and through single fluid conductor  520  into the lower driving piston chamber  522 , the driving piston head  525  moves upward against the force of the pressurized gas charge in resilient chamber  540 , pushing the pumping piston head  570  upward. As the pumping piston head  570  moves upward, fluid from the well enters the pumping chamber  562  through screen  585 , cavity  564 , ingress port  560 , and ingress check valve  555  (more clearly depicted in  FIG. 8 ). This continues until the force being exerted by the fluid pressure on the driving piston head  525  is equal the forces being exerted against the driving piston head or until a pre-defined volume has been pumped by the surface pump ( 155 ;  FIG. 1 ) via a surface controller ( 150 ;  FIG. 1 ). These forces include the force exerted downward by the gas-filling chamber  540  on the driving piston head  525  and the force being exerted downward on the pumping piston head  570  by the chamber  580 . At this point, additional fluid being supplied by the conduit  505  has no further effect unless the pressure is increased. Once the pumping chamber is filled or at least partially filled, the pressure on the conduit  505  can be released by the controller ( 150 ) on the surface. As the pressure in conduit  505  is released by controller ( 150 ), the chamber  540  restores equilibrium by exerting force on the driving piston head  525  causing the pumping piston head to force fluid from pumping chamber  562  through egress port  590  and egress check valve  595 . The ingress check valve  555  prevents fluid from exiting the pumping chamber  562  via the ingress port  460 . The only exit for the fluid is through egress port  590  and egress check valve  595  via line  515 , lower driving piston chamber  522 , single fluid conductor  520 , and conduit  505 . As fluid is continually pushed out of the pumping chamber  562 , it is pushed into the single conductor  520  and up the conduit  505 . Once the pump stops producing fluid at an acceptable rate, the process is repeated again.  
         [0045]      FIG. 7  depicts an enlarged view of the gas charging port for reservoir  541 . This port can be used to charge a high-pressure gas such as nitrogen into the reservoir to supply chamber  540  before deployment of the pump or after deployment if a pressurized gas line is installed. Reservoir  541  can be several meters to several hundred meters in length depending on the well characteristics.  
         [0046]      FIG. 8  depicts an enlarged, cross-sectional view of the embodiment of  FIG. 5 .  FIG. 8  depicts that fluid egress port  590  and fluid ingress port  560  are actually two separate lines that appear as a single line on  FIG. 5 . Fluid is drawn from fluid cavity  564  into pumping chamber  562 , then exits the chamber  562  into egress line  590  through back-flow valve  595  and from there through line  515  up the well to the surface.  
         [0047]     It may be readily appreciated that the single conduit pump can be suspended through a subsurface safety valve system; or it may be suspended in the subsurface safety valve.  
         [0048]     The above embodiments describe possible examples of the subject matter of the present disclosure and should not be construed as limitations. There are many additional possibilities of how to arrange the resilient chamber and driving chamber that will allow the disclosed pump to function in the same manner. In addition, the pistons described herein, it is possible to use any type of resilient chamber such as a diaphragm or other resilient means known in the art. Every possible combination has not been included and described. Sufficient examples have been described to demonstrate that many different possibilities exist for the actual construction of the subject matter of the present disclosure. In addition, while the embodiment described herein refer to pumping well fluids, the single conduit pump described herein and its method of use could be applied to other applications where a single conductor pump might be beneficial.