Patent Publication Number: US-9404314-B2

Title: Reciprocating debris exclusion device for downhole connectors

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     None. 
     FIELD OF INVENTION 
     Methods and apparatus are presented for connecting downhole connectors in a wellbore environment. More particularly, methods and apparatus are presented for protecting a Point of Interest prior to and during connection to another Point of Interest, for example, when making a downhole fiber optic connection. 
     BACKGROUND OF INVENTION 
     Without limiting the scope of the present invention, its background is described with reference to using optical fibers for communication in a subterranean wellbore environment, as an example. It is well known in the subterranean well completion and production arts that downhole sensors can be used to monitor a variety of parameters in the wellbore environment. For example, during a treatment operation, it may be desirable to monitor a variety of properties of the treatment fluid such as viscosity, temperature, pressure, velocity, specific gravity, conductivity, fluid composition and the like. Transmission of this information to the surface in real-time or near real-time allows the operators to modify or optimize such treatment operations to improve the completion process. One way to transmit this information to the surface is through the use of communication lines, such as one or more optical fibers, copper or metallic cables, or hydraulic or pressure lines. In addition, optical fibers may serve as sensors, where the optical fiber obtains distributed measurements related to a parameter along the length of the fiber. 
     In a typical wellbore treating or stimulation operation, a lower portion of completion string including various tools such as sand control screens, fluid flow control devices, wellbore isolation devices and the like is permanently installed in the wellbore. The lower portion of the completion string may include various sensors, particularly, a lower portion of optical fiber. After the stimulation process, an upper portion of the work string including an upper portion of optical fiber is separated from the lower completion string and retrieved to the surface. This operation cuts-off communication between the lower string, which remains in place, and the surface. Accordingly, if information from the production zones is to be transmitted to the surface during later production operations, a connection to the lower optical fiber must be reestablished when the production tubing string is installed. 
     It has been found, however, that wet-mating optical fibers in a downhole environment is very difficult. Difficulties due to lack of precision in the axial movement of the production string relative to the previously installed completion string are addressed, for example, in U.S. Pat. No. 8,122,967, to Richards, entitled Apparatus and Method for Controlling the Connection and Disconnection Speed of Downhole Connectors, which is hereby incorporated by reference for all purposes. Further disclosure regarding downhole connections can be found in U.S. Patent Application Publication 2012/0181045, to Thomas, entitled Apparatus and Method for Controlling the Connection and Disconnection Speed of Downhole Connectors, which is hereby incorporated by reference for all purposes. 
     Additionally, wet-mate connections or wet-connects have become prevalent, especially in off-shore deep wells where it is difficult to provide for a dry-connection. A downhole communication line and a connector are often left in place, such as at the upper end of a completion string or production string. A second tool string is later lowered into the wellbore, also having a communication line and connector. The communication connectors are mated to provide an operable communication link between the tools. While it is possible to lower tool strings with all of the communication lines and corresponding conduits in place, there is increasing interest in wet-connect or wet-mate capabilities, that is, connections made in a wet environment. Further, it is often necessary or desirable to disconnect the tools and repeat the process, as later tools are inserted into the well, to speed and simplify equipment changes, replacement, or employ different tool configurations over time. 
     Typically wet-connects are hydraulic or electric in nature, where a pressure-competent connection or an electrically isolated connection, respectively, must be created. These require a reasonably high degree of cleanliness and several methods are known to make these connections with varying success. With the increase in usage of fiber optic communication lines in particular, it has become critical to provide an especially “clean” connection between mating connectors. Fiber optic connections generally require relatively greater positional registration and cleanliness. 
     Therefore, a need has arisen for apparatus and methods for wet-connecting optical fibers and other communication lines in a subterranean wellbore environment. 
     SUMMARY OF THE INVENTION 
     Presented are methods and apparatus for protecting wet-mate connectors and other points of interest from debris during connection. In one embodiment, a method of protecting the free ends of communication lines from debris during downhole connection in a subterranean well is presented. A first downhole assembly, having a first connector with a free end of a first communication line fixed thereto, is positioned at a downhole location in the wellbore. A second downhole assembly, having a second connector with a free end of a second communication line fixed thereto, is moved into the wellbore and relative to the first downhole assembly. A first reciprocating member, mounted for movement on the first downhole assembly, is moved from an initial position to an actuated position, the first reciprocating member moving relative to the first connector. A second reciprocating member, mounted for movement on the second downhole assembly, is moved from an initial position to an actuated position, the second reciprocating member moving relative to the second connector. A first protective cover, attached to the first reciprocating member, is moved from an initial position, wherein the free end of the first communication line is protected from debris, to an open position, wherein the free end of the first communication line exposed. A second protective cover, attached to the second reciprocating member, is moved from an initial position wherein the free end of the second communication line is protected from debris to an open position wherein the free end of the second communication line is exposed. The first and second connectors are connected, establishing communication across the free ends of the first and second communication lines. The preceding steps can be accomplished in various orders, as will be clear upon review of the disclosure herein and as will be clear to persons of skill in the art. After use, the first and second connectors are disconnected. The first reciprocating member is returned to its initial position and the first cover is returned to its initial position wherein the free end of the first connector is protected from debris. Similarly, the second reciprocating member is returned to its initial position and the second cover is returned to its initial position wherein the free end of the second connector is protected from debris. 
     The steps during connection are in response to moving the second downhole assembly toward the first downhole assembly. The communication lines can be fiber optic, copper, or hydraulic lines. The second downhole assembly can be lowered on a work string, coiled tubing or wireline, for example. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       For a more complete understanding of the features and advantages of the present invention, reference is now made to the detailed description of the invention along with the accompanying figures in which corresponding numerals in the different figures refer to corresponding parts and in which: 
         FIG. 1  is a schematic illustration of an offshore oil and gas platform operating an apparatus for protecting Points of Interest, such as fiber optic connectors, during connection of downhole connectors according to an embodiment of the present invention; 
         FIG. 2  is a schematic view of a wellbore extending through a subterranean formation, a well tool string positioned therein, and having an exemplary wet-connect connection system according to an aspect of the invention; 
         FIG. 3  is a side view schematic of an upper tool assembly  100  having an embodiment of a reciprocating debris exclusion assembly according to an aspect of the invention; 
         FIG. 4  is a side view detail schematic of an exemplary embodiment of the invention of a reciprocating debris exclusion system according to an aspect of the invention; 
         FIGS. 5A-B  are schematic views of a lower tool assembly according to an aspect of the invention; 
         FIG. 6  is cross-sectional detail view of an exemplary unlocking assembly according to an aspect of the invention; 
         FIG. 7  is a cross-sectional detail schematic of an exemplary embodiment of an operation locking assembly according to an aspect of the invention; 
         FIG. 8  is a cross-sectional detail schematic of an exemplary anchoring assembly  102  according to an aspect of the invention 
         FIG. 9  is a cross-sectional detail schematic of a metering assembly according to an aspect of the invention; 
         FIG. 10  is a detail schematic of the anchor head and reciprocating debris exclusion assembly according to an aspect of the invention; 
         FIG. 11  is a detail schematic of the anchor head and reciprocating debris exclusion assembly according to an aspect of the invention; 
         FIG. 12  is a detail, partial view schematic of the anchor head and reciprocating debris exclusion assembly according to an aspect of the invention in which the lower debris exclusion assembly is in position to be opened; 
         FIG. 13  is an orthogonal end view schematic of the upper reciprocating connector block; 
         FIG. 14  is an orthogonal end view schematic of the lower reciprocating block; 
         FIG. 15  is a detail cross-sectional schematic of the upper and lower connector assemblies in a mating position; 
         FIG. 16  is a detail cross-sectional schematic of the anchor head load assembly; 
         FIG. 17  is an orthogonal view of an embodiment of a debris exclusion cover assembly according to an aspect of the invention; 
         FIG. 18  is an orthogonal view of the debris exclusion cover assembly of  FIG. 17  with a transparent cover to show internal features; 
         FIGS. 19 and 20  are detail cross-sectional views of an embodiment of a reciprocating debris exclusion assembly according to an aspect of the invention with  FIG. 19  showing the debris exclusion assembly prior to mating and  FIG. 20  showing the assembly in a mated position; 
         FIG. 21  is an alternate embodiment of a cover assembly for protecting the free end of a connector and communication line or other Point of Interest according to an aspect of the invention; 
         FIG. 22  is an alternate embodiment of a cover assembly according to an aspect of the invention; 
         FIG. 23  is an alternate embodiment of a cover assembly according to an aspect of the invention; 
         FIG. 24  is an alternate embodiment of a cover assembly according to an aspect of the invention; 
         FIG. 25  is the alternate embodiment of a cover assembly seen in  FIG. 24  according to an aspect of the invention; 
         FIG. 26  is an alternate embodiment of a cover assembly according to an aspect of the invention; 
         FIG. 27  is the alternate embodiment of a cover assembly as in  FIG. 26  according to an aspect of the invention; 
         FIG. 28  is a side view in cross-section showing a reciprocating debris exclusion device according to an aspect of an invention disclosed herein; 
         FIG. 29  is a side view in cross-section of the reciprocating debris exclusion device of  FIG. 28  in a contact position according to an aspect of an invention disclosed herein; and 
         FIG. 30  is a side view in cross-section of the reciprocating debris exclusion device of  FIG. 29  in a connected position according to an aspect of an invention disclosed herein. 
     
    
    
     It should be understood by those skilled in the art that the use of directional terms such as above, below, upper, lower, upward, downward and the like are used in relation to the illustrative embodiments as they are depicted in the figures, the upward direction being toward the top of the corresponding figure and the downward direction being toward the bottom of the corresponding figure. Where this is not the case and a term is being used to indicate a required orientation, the Specification will state or make such clear. 
     DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS 
     While the making and using of various embodiments of the present invention are discussed in detail below, a practitioner of the art will appreciate that the present invention provides applicable inventive concepts which can be embodied in a variety of specific contexts. The specific embodiments discussed herein are illustrative of specific ways to make and use the invention and do not limit the scope of the present invention. The description is provided with reference to a vertical wellbore; however, the inventions disclosed herein can be used in horizontal, vertical or deviated wellbores. As used herein, the words “comprise,” “have,” “include,” and all grammatical variations thereof are each intended to have an open, non-limiting meaning that does not exclude additional elements or steps. It should be understood that, as used herein, “first,” “second,” “third,” etc., are arbitrarily assigned, merely differentiate between two or more items, and do not indicate sequence. Furthermore, the use of the term “first” does not require a “second,” etc. The terms “uphole,” “downhole,” and the like, refer to movement or direction closer and farther, respectively, from the wellhead, irrespective of whether used in reference to a vertical, horizontal or deviated borehole. The terms “upstream” and “downstream” refer to the relative position or direction in relation to fluid flow, again irrespective of the borehole orientation. Although the description may focus on a particular means for positioning tools in the wellbore, such as a tubing string, coiled tubing, or wireline, those of skill in the art will recognize where alternate means can be utilized. As used herein, “upward” and “downward” and the like are used to indicate relative position of parts, or relative direction or movement, typically in regard to the orientation of the Figures, and does not exclude similar relative position, direction or movement where the orientation in-use differs from the orientation in the Figures. 
     Referring to  FIG. 1 , an apparatus for controlling the connection speed of downhole connectors deployed from an offshore oil or gas platform is schematically illustrated and generally designated  10 . A semi-submersible platform  12  is centered over submerged oil and gas formation  14  located below sea floor  16 . A subsea conduit  18  extends from deck  20  of platform  12  to wellhead installation  22 , including blowout preventers  24 . Platform  12  has a hoisting apparatus  26 , a derrick  28 , a travel block  30 , a hook  32  and a swivel  34  for raising and lowering pipe strings, such as a substantially tubular, axially extending production tubing  36 . 
     A wellbore  38  extends through the various earth strata including formation  14 . An upper portion of wellbore  38  includes casing  40  that is cemented within wellbore  38 . Disposed in an open hole portion of wellbore  38  is a completion string  42  that includes various tools such as packer  44 , a seal bore assembly  46  and sand control screen assemblies  48 ,  50 ,  52 ,  54 . In the illustrated embodiment, completion string  42  also includes an orientation and alignment subassembly  56  that houses a downhole wet mate connector. Extending downhole from orientation and alignment subassembly  56  is a conduit  58  that passes through packer  44  and is operably associated with sand control screen assemblies  48 ,  50 ,  52 ,  54 . Preferably, conduit  58  is a spoolable metal conduit, such as a stainless steel conduit that may be attached to the exterior of pipe strings as they are deployed in the well. In the illustrated embodiment, conduit  58  is wrapped around sand control screen assemblies  48 ,  50 ,  52 ,  54 . One or more communication media such as optical fibers, electrical conducts, hydraulic fluid or the like may be disposed within conduit  58 . In certain embodiments, the communication media may operate as energy conductors including power and data transmission between downhole a location or downhole sensors (not pictured) and the surface. In other embodiments, the communication media may operate as downhole sensors. 
     For example, when optical fibers are used as the communication media, the optical fibers may be used to obtain distributed measurements representing a parameter along the entire length of the fiber such as distributed temperature sensing. In this embodiment, a pulse of laser light from the surface is sent along the fiber and portions of the light are backscattered to the surface due to the optical properties of the fiber. The slightly shifted frequency of the backscattered light provides information that is used to determine the temperature at the point in the fiber where the backscatter originated. In additions as the speed of light is constant, the distance from the surface to the point where the backscatter originated can also be determined. In this manner, continuous monitoring of the backscattered light will provide temperature profile information for the entire length of the fiber. 
     Disposed in wellbore  38  at the lower end of production tubing string  36  are a variety of tools including seal assembly  60  and anchor assembly  62  including downhole wet mate connector  64 . Extending uphole of connector  64  is a conduit  66  that extends to the surface in the annulus between production tubing string  36  and wellbore  38  and is suitable coupled to production tubing string  36  to prevent damage to conduit  66  during installation. Similar to conduit  58 , conduit  66  may have one or more communication media, such as optical fibers, electrical conducts, hydraulic fluid or the like disposed therein. Preferable, conduit  58  and conduit  66  will have the same type of communication media disposed therein such that energy may be transmitted therebetween following the connection process. As discussed in greater detail below, prior to producing fluids, such as hydrocarbon fluids, from formation  14 , production tubing string  36  and completion string  42  are connected together. When properly connected to each other, a sealed communication path is created between seal assembly  60  and seal bore assembly  46  which establishes a sealed internal flow passage from completion string  42  to production tubing string  36 , thereby providing a fluid conduit to the surface for production fluids. In addition, as discussed in greater detail below, the present invention enables the communication media associated with conduit  66  to be operatively connected to the communication media associated with conduit  58 , thereby enabling communication therebetween and, in the case of optical fiber communication media, enabling distributed temperature information to be obtained along completion string  42  during the subsequent production operations. 
     Even though  FIG. 1  depicts a slanted wellbore, it should be understood by those skilled in the art that the apparatus for controlling the connection speed of downhole connectors according to the present invention is equally well suited for use in wellbore having other orientations including vertical wellbores, horizontal wellbores, multilateral wellbores or the like. Accordingly, it should be understood by those skilled in the art that the use of directional terms such as above, below, upper, lower, upward, downward and the like are used in relation to the illustrative embodiments as they are depicted in the figures, the upward direction being toward the top of the corresponding figure and the downward direction being toward the bottom of the corresponding figure. Also, even though  FIG. 1  depicts an offshore operation, it should be understood by those skilled in the art that the apparatus for controlling the connection speed of downhole connectors according to the present invention is equally well suited for use in onshore operations. Further, even though  FIG. 1  depicts an open hole completion, it should be understood by those skilled in the art that the apparatus for controlling the connection speed of downhole connectors according to the present invention is equally well suited for use in cased hole completions. 
       FIG. 2  is a schematic view of a wellbore  70  extending through a subterranean formation  72 , a well tool string  74  positioned therein and having an exemplary wet-connect connection system  80  according to an aspect of the invention. The tool string includes a sub-surface safety valve (SSSV)  82  positioned below a wellhead (not shown). Below the SSSV is any number of string segments to desired length. A travel joint  84  releasably connects to an anchoring device  86  having an anchor head  88 . An upper wet-mate connector assembly  76  with multiple upper wet-mate connectors  78  is positioned at the lower end of the work string. The upper wet-mate connector can be positioned in or adjacent the anchor head. Packers  81  isolate the lower end of the tool string from the wellbore annulus above. An exemplary communication line  86  or cable is shown extending along the length of the tool string from the surface, through the travel joint, and to the anchor device and wet-mate connector assembly. The communication line can be one or multiple lines or cables, fiber optic, electrical, etc. The line or lines can be positioned exterior to the tool string, as shown, interior, in a dedicated conduit, etc. 
     The tool string shown is schematic only, lacking details such as joints, tubing sections, additional tools, lines, sealing devices, etc., is not to scale, does not attempt to show all of the tools and sections typically used in such a work string, and is exemplary, as the tool string can have fewer or more tools, in various arrangements, as is known in the art. The wellbore can be cased, cemented, and at various stages of preparation, stimulation, production, etc. Further, the wellbore can be vertical, deviated or horizontal. 
     The tool string  74  is shown lowered into position above a lower tool assembly  90  positioned at a downhole location in the wellbore. The exemplary lower tool assembly  90  includes a scoop head assembly  92 , an isolated tubing section  94 , a circulating valve  96 , screen assembly  98  adjacent perforated region  99 , and sensors, gauges, data transmission systems, and other downhole electronic equipment  97 . The region  99  is isolated by annular barriers such as sump packer  95  and packer  93 . The lower tool assembly is held in position by packers, anchoring devices, or the like. The lower assembly shown is exemplary and schematic only and may include additional or differing tools and configurations as are known in the art. The scoop head assembly  92  is designed to connect to the anchor head of the tool string  74 . A lower wet-mate connector assembly  91  with multiple lower wet-mate connectors  89  is positioned at the upper end of the lower tool assembly  90 . The lower wet-mate connector can be positioned in or adjacent the scoop head assembly. The lower wet-mate connector maintains the positioning of a free end of lower communication cable or line  87 . 
     As the tool string  74  is lowered into position above the lower tool assembly  90 , the anchor head assembly aligns with and contacts the scoop head assembly. Further movement of the tool string downward results in contact and connection of the upper and lower wet-mate connectors, thereby allowing communication between downhole equipment and the surface. The details of the connection are discussed herein in exemplary embodiments including apparatus and methods for executing a clean connection between wet-mate connectors. 
     The invention described herein is generally discussed in terms of providing for protected connections or connectors of fiber optic cables or lines. Such terms are used to generically refer to communications cables, wires, lines, conduits, etc., including fiber optic, copper or other metal, hydraulic, etc. The term “Point of Interest” is used to refer to the end of the communication line which is to be connected to a corresponding end of another line, or to the line end and connector or connector body holding the line end. In  FIG. 2 , for example. the Points of Interest  78  and  89  are the connectors holding the free ends of the upper line  86  and lower line  87 . 
       FIG. 3  is a side view schematic of an upper tool assembly  100  having an anchoring assembly  102  for anchoring the tool assembly to a lower tool assembly positioned downhole (such as a completion or production string), metering assembly  104  for controlling speed of connection and disconnection of the upper and lower tool assemblies, anchor head load assembly  106  for applying load on the anchor head against the lower tool assembly after setting, an anchor head assembly  108  housing the upper wet connectors, an operation locking assembly  110  for engaging the lower connector subassembly (of the lower tool assembly) and locking against relative movement in production or operation mode, and a RIH locking assembly  116  for maintaining the relative position of tool elements during RIH. Upper and lower subs  112  and  114  are seen for connecting the tool assembly to, respectively, a work string, wireline or other conveyance, and to the lower tool assembly positioned in the wellbore. Details of the assemblies are discussed herein. 
       FIG. 4  is a side view detail schematic of an exemplary embodiment of the invention (with selected external components (e.g., housings) removed to allow a view of interior components) of a reciprocating debris exclusion system  118  according to an aspect of the invention. The upper tool assembly  100  is seen in initial cooperation with lower tool assembly  120 . Lower sub  114 , preferably a sealing sub, telescopes into the mandrel  122  of lower tool assembly  120  upon running-in the upper tool assembly. The lower sub  114  enters the scoop or alignment head  167  of the lower tool assembly, as seen in  FIGS. 5A-B . 
     The anchor head assembly  108  preferably houses the upper components of the reciprocating debris exclusion assembly while the lower cooperating components of the reciprocating debris exclusion assembly are preferably housed in a top sub  124  of the lower tool assembly  120 . The upper tool assembly has a mandrel  126  on which is slidably mounted the anchor head assembly  108 , including anchor head  128 . The anchor head  128  defines longitudinally downwardly extending props  130  which cooperate with the operation locking assembly  110 . The operation locking assembly  110  includes an operation locking body  131  with locking keys  132  mounted thereon which cooperate with corresponding key windows  134  in the locking assembly. The locking keys are unsupported during run-in. 
     The upper tool assembly also includes an alignment subassembly  136  with exterior longitudinally extending alignment lug  138  which interacts with the slot  174  of the scoop head of the lower tool assembly  120  to rotate the upper tool assembly to the preferred alignment during insertion into the lower tool assembly. 
     The reciprocating debris exclusion assembly  118  includes an upper reciprocating subassembly  140  mounted on the upper tool assembly  100  and a lower reciprocating subassembly  142  mounted on the lower tool assembly  120 . 
     The upper reciprocating subassembly  140  includes a slidably mounted connector block  144  which slides longitudinally within recess  146  defined in anchor head  128 . The upper connector block  144  contacts lug  143  which is fixedly attached to, or extends from, the mandrel  126 . The upper fiber optic lines are carried in upper connectors  147 , one for each fiber optic line. The upper connectors  147  are slidably mounted to the anchor head  128  and extend from the splicer block  150  and through corresponding holes  148  in reciprocating connector block  144 . The splicer block  150  is spring biased, such as by biasing elements  113 , shown as springs. Protective covers  152  are mounted on the reciprocating block  144  and positioned to cover the free ends of the connectors  147  (and the line ends held thereby) during run-in and prior to connection. The covers  152  are preferably biased by biasing elements towards a closed position, as seen in  FIG. 4 . Note that the “splicer block” is so-called here since it contains the splicer in addition to its function in supporting the connectors and reciprocating, preferably with a spring bias. The block is a reciprocating or sliding block with attached one or more connectors; it need not necessarily act as a splicer, where only one connector is used or where the splicing occurs at another location. A preferred cover assembly is discussed below. 
     The upper reciprocating connector block  144  defines at its lower end a plurality of longitudinally downward extending lugs  153  which cooperate with corresponding guides  168  in the top sub  124  of the lower tool assembly  120 . The anchor head  128  has longitudinally extending lugs  129  which extend under the reciprocating block  144  and cooperate, in use, with corresponding channels  141  defined in the interior surface of the top sub  124  of the lower tool assembly, as best seen in  FIG. 14 . In use, the lugs  129  slide into the channels, radially interior to the top sub, as the upper assembly is lowered into contact the top sub. The lugs  129  contact corresponding faces  170  defined on the upper end of the lower reciprocating block  154 , forcing the lower block to move longitudinally downward. Further, the anchor head has “no-go” or lug faces  145  which cooperate with corresponding no-go faces  172  defined on the upper end of the top sub  124 . The anchor head no-go faces  145  contact the corresponding top sub no-go faces  172  after or during full mating of the upper and lower connectors. 
     It is understood that one or more communication lines can be used, and that a single line from the surface can be split using conventional splitters into multiple lines at or near the lower end of the work string. For example, the multiple connectors  147  each carry a length of fiber optic line for connection to corresponding lengths of line on the lower tool assembly. However, a single fiber optic line extends from the surface to a splitter positioned within splicer or splitter housing  150  on the upper tool assembly. Similarly, one or more lines can be run on the lower tool assembly, or a single line with splitters near the connection location. Splices can be used to merge lines as well, such as lines from various sensors on the lower tool assembly. 
     The lower reciprocating subassembly  142  includes a slidably mounted connector block  154  which slides longitudinally within a recess or between guides defined in the top sub  124  of the lower tool assembly  120 . The lower connector block  154  is spring biased, such as by biasing elements  156 , shown as springs, towards a closed position, as seen in  FIG. 4 , in which the Point of Interest, namely the ends of the fiber optic lines, is protected or covered. The lower fiber optic lines are carried in lower connectors  158 , one for each fiber optic line. The lower connectors  158  are attached to top sub  124  of lower tool assembly  120  and extend through corresponding holes  160  in lower reciprocating connector block  154 . Protective covers  162  are mounted on the reciprocating block  154  and positioned to cover the free ends of the connectors  158  (and the line ends held thereby) during run-in and prior to connection. The covers  162  are preferably biased by biasing elements towards a closed position, as seen in  FIG. 4 . A preferred cover assembly is discussed below. The top sub  124  can also include splicers, splitters, and other well-known communications components. For example, splitter or splicer housing  164  is seen at the lower end of the lower connectors. 
     The lower reciprocating assembly also includes an upper profile having a plurality of longitudinally extending guides  168  for contacting lugs  153  of the upper reciprocating block  144 . Key holes  166  are defined in the top sub  124  for cooperating with locking keys  132  of the operation locking assembly  110  of the upper tool assembly  100 . Channels  141  are defined on the interior surface of the top sub to receive and cooperate with lugs  129  of the anchor head. 
       FIGS. 5A-B  are schematic views of a lower tool assembly according to an aspect of the invention. The lower tool assembly  120  is seen with selected transparent walls for ease of reference; also note that the scoop head is omitted from other Figures to better show coordination of the anchor head assembly  108  and the top sub  124 . The lower tool assembly includes the top sub  124 , as previously discussed, positioned within a scoop head assembly  167 . The scoop head assembly  167  defines an interior helical guide  171  and longitudinal slot  174  for interacting with the alignment lug  138  of the alignment subassembly  136  of the upper tool assembly  100 . Snap rings  176  provide scoop head rigidity. An internal unlocking profile  178  is defined for interaction with the unlocking collet of the run-in-hole locking assembly  116  of the upper tool assembly  100 . A splice sub  180  is seen on the lower tool assembly as well. 
       FIG. 6  is cross-sectional detail view of an exemplary unlocking assembly according to an aspect of the invention. The locking assembly  116  includes a locking collet  182  positioned about a locking assembly mandrel  183 . The spring-loaded locking keys  184  are positioned between the collet and mandrel initially in a radially expanded and locked position during run-in. The keys cooperate with the surfaces of the locking collet  182  and sleeve  188  of the anchoring assembly  102  to lock the anchor assembly and prevent accidental stroke during run-in. The locking collet  182  enters the scoop head assembly  167  and collet dogs  186  cooperate with internal unlocking profile  178 . The collet  182  depresses the spring-loaded locking keys  184  thereby freeing the anchoring assembly  188  to slide respective to the mandrel  183 . 
       FIG. 7  is a cross-sectional detail schematic of an exemplary embodiment of an operation locking assembly  110  according to an aspect of the invention. The operation locking assembly  110  is seen in detail having a locking body  131  with a no-go surface  190  at its lower end. Locking keys  132  are supported by internal biasing members  192  such that the keys are biased radially outwardly. As the upper tool assembly is lowered, the locking body no-go surface  190  contacts a cooperating no-go surface  194  defined on the interior surface of the top sub  124 . The locking keys  132  are forced radially outwardly into a top sub internal profile  196 . The locking keys  132  extend through the key windows  166  of the top sub  124  (seen in  FIG. 4 ). Note that the keys are unsupported as the prop  130  of the anchor head  128  have not yet slid into channel  198  defined between the interior of the locking body and the mandrel  126 . A radially extending pin  133  connects locking body  131  with a key  135  which locks into slot  137  on mandrel  126  to prevent relative rotation between the mandrel and locking body. 
       FIG. 8  is a cross-sectional detail schematic of an exemplary anchoring assembly  102  according to an aspect of the invention. Internal profile  200  of the scoop head  167  cooperates with dogs  202  of anchoring assembly collet  204  as the upper tool assembly continues to be lowered into the scoop head. Once set, the anchoring collet  204  secures the upper tool assembly to the lower tool assembly. Also visible is the anchoring re-setting spring  206  which is compressed against the upper shoulder  208  of the locking assembly mandrel  183  during metering of the metering assembly. The resetting spring operates to re-set the assembly upon disconnection. 
       FIG. 9  is a cross-sectional detail schematic of a metering assembly according to an aspect of the invention. At its upper end, the upper tool assembly  100  includes a metering assembly  104  having a slidable metering mandrel  210 . Disposed between metering mandrel  210  and exterior tubular  212  is annular oil chamber  214  having an upper section  216  and lower section  218 . Transfer piston  220  is positioned in the annular chamber and includes one or more passageways  222  therethrough, the passageways preferably having metering orifices  223  which regulate fluid flow rates. In one embodiment, a check valve is disposed in each passageway  222  to limit fluid flow to one direction. In one embodiment, certain check valves allow fluid flow in the uphole direction while other check valves allow fluid flow in the downhole direction. The resistance to flow in the downhole direction can be different from the resistance to flow in the uphole direction. The metering function of the passageways and orifices determines the speed of coupling and decoupling of the downhole connectors. Disposed within annular oil chamber  214  is compensation piston  224 . At its lower end, exterior tubular  212  is connected to connector member  225 . At its lower end, metering mandrel  210  is threadedly and sealingly coupled to the upper end of a key block  183 , discussed herein. 
     As the anchor starts metering, that is, as hydraulic fluid is transferred from the upper chamber  216  to the lower chamber  218 , the resetting spring  206  is compressing. Metering is started by setting down weight on the upper tool assembly through the work string. For example, a set-down weight of 10 k pounds can be used to start metering the anchor. When crack relief pressure is reached, the anchor begins collapsing and the resetting spring is compressed. The anchor continues metering, which pushes downwards on the external components until the anchor head no-goes against the top sub of the lower tool assembly. 
     For further disclosure as to the operation of the resetting spring and assembly, see U.S. Patent Application Publication No. 2012/0181045, to Thomas, filed Feb. 25, 2012. 
       FIG. 10  is a detail schematic of the anchor head and reciprocating debris exclusion assembly according to an aspect of the invention. In  FIG. 10 , a detail of the reciprocating debris exclusion assembly  118  is seen, with the anchor head  128  moved into a position such that the upper connector block  144  is in contact with the lower guides  168 . More specifically, the plurality of longitudinally downward extending lugs  153  of the upper reciprocating connector block  144  are in contact with the cooperating and corresponding guides  168  of the top sub  124  of the lower tool assembly  120 . The upper connector block is in a no-go position against the top sub. The downwardly extending props  130  of the anchor head  128  continue downward to cooperate with the operation locking assembly  110 . Locking keys  132  of the locking body  131  are moved into position with respect to the key windows  134  in the locking assembly. 
       FIG. 11  is a detail schematic of the anchor head and reciprocating debris exclusion assembly according to an aspect of the invention. The anchor head continues downward while the upper connector block  144  is held in position, causing relative movement between the block and anchor head. The upper connector block  144  slides in recess  146 , the holes  148  in reciprocating connector block  144  allow the upper connectors  147  to maintain position, and the connector protective covers  152  are pulled along with upper block  144 , thereby forcing the covers  152  to open revealing the free ends  149  of the connectors  147  and the fiber optic line ends held by the connectors. The longitudinally extending lugs  129  of the anchor head  128  extend into and cooperate with corresponding channels  141  defined in the interior surface of the top sub  124  of the lower tool assembly. Interior to the top sub  124 , the prop  130  of the anchor head begin to slide under and support the locking keys  132 . 
       FIG. 12  is a detail, partial view (with top sub  124  removed), schematic of the anchor head and reciprocating debris exclusion assembly according to an aspect of the invention in which the lower debris exclusion assembly is in position to be opened.  FIG. 12  shows the lugs  129  of the anchor head contacting corresponding lower connector block faces  170  defined at the upper end of the lower connector block  154 . As the anchor head continues its downward stroke, the lugs  129  force the lower reciprocating block  154  to move longitudinally downward. Movement of the block  154  pulls the attached covers  162  downward, thereby exposing the ends of the lower connectors  158  and the free ends of the fiber optic lines. Biasing element  156  is compressed by this movement as well, positioning the biasing element to force the lower connector block back upwards upon disconnect and removal of the anchor head. 
       FIG. 13  is an orthogonal end view schematic of the upper reciprocating connector block.  FIG. 14  is an orthogonal end view schematic of the lower reciprocating block.  FIGS. 13 and 14  provide another view of the cooperating elements of the upper connector block  144 , the top sub  124 , lower connector block  154 , and anchor head  128 . Detailed description of these assemblies is found elsewhere herein. 
       FIG. 15  is a detail cross-sectional schematic of the upper and lower connector assemblies in a mating position. As the anchor head moves downward, the no-go faces  145  of the anchor head contact the corresponding no-go faces  172  of the top sub  124 . The upper and lower connectors  147  and  158  are fully mated. The anchor head prop  130  has slid beneath and supports the locking keys  132  in key window  166 . 
       FIG. 16  is a detail cross-sectional schematic of the anchor head load assembly  106 . Further disclosure of the operation of the locking collet, etc., can be found in the incorporated references. The anchor continues downward movement, with the metering assembly completing its metering, and large anchor collet  202  snaps into corresponding profile  200  defined on the interior of the top sub. As production spring  234  is compressed, spring housing  236  telescopes relative to connector member or sub  238 . This shortening of the outer components of the anchor assembly allows spring key  240  to engage groove  242  of mandrel  126 . Once spring key  240  has radially inwardly retracted, the outer components of the anchor assembly further collapse as the collet assemblies telescope relative to key mandrel  244 . This shortening allows anchor collets  202  to engage locking profile  200  which couples the anchor assembly to the lower tool assembly. The shortening allows unlocking collets  186  to engage groove  178  which relaxes the unlocking collets. The inner portions of the anchor assembly are independently secured to the lower tool assembly as prop  130  on the lower end of the anchor head is positioned under locking key  132  such that locking key  132  engages profile  166  of top sub  124 . 
       FIG. 17  is an orthogonal view of an embodiment of a debris exclusion cover assembly  248  according to an aspect of the invention.  FIG. 18  is an orthogonal view of the debris exclusion cover assembly of  FIG. 17  with a transparent cover to show internal features. The debris exclusion cover assembly  248  includes a base  250 , a debris exclusion cover  252 , and biasing elements  254 . The base  250  allows attachment to the reciprocating block. In the preferred embodiment the base is a metallic tubular having a flange  256  for insertion into a mating cylindrical end of a connector. Attachment can be made by pins, screws, or other fasteners. The cover  252  is preferably a rubber, plastic or composite material that can withstand downhole environments. The cover can be a single piece divided by multiple longitudinally extending slits which allow the cover to open similar to a flower. Alternately, and as shown, the cover can be made of multiple pieces  260  shaped to abut one another when the cover is in the closed position. In a preferred embodiment, the cover is biased towards the closed position by one or multiple biasing elements  254 . In the embodiment shown, longitudinally extending metal beams having a slight radially inward curve are seen. Each beam supports a corresponding cover piece  260 . Each beam, at its lower end, is connected (or formed of-a-piece with) an element base  262 . The base provides support for the beam and a manner of attachment of the biasing elements to the debris exclusion cover assembly base  250 . 
       FIGS. 19 and 20  are detail cross-sectional views of an embodiment of a reciprocating debris exclusion assembly according to an aspect of the invention.  FIG. 19  shows the debris exclusion assembly prior to mating while  FIG. 20  shows the assembly in a mated position. Some elements are omitted to allow a better view of other elements under discussion here. Anchor head  128  is slidably mounted on mandrel  126 . The reciprocating debris exclusion assembly includes an upper reciprocating subassembly  140  mounted on the upper tool assembly and a lower reciprocating subassembly  142  mounted on the lower tool assembly. The upper reciprocating subassembly  140  includes a slidably mounted connector block  144  which slides longitudinally within corresponding recess  146  defined in anchor head  128 . The upper fiber optic lines are carried in upper connectors  147  (one seen here). The upper connectors  147  are slidably mounted to the anchor head  128  and extend from the splicer or reciprocating connector block and through corresponding holes  148  in reciprocating block  144 . Protective covers  152  are mounted to the reciprocating block  144  at connection  270  and positioned to cover the free ends of the connectors  147  (and the fiber optic or other line ends held thereby) during run-in and prior to connection. The covers  152  are biased closed. The upper connector block  144  contacts lug  143  which is fixedly attached to, or extends from, the mandrel  126 . 
     The upper reciprocating connector block  144  defines at its lower end a plurality of longitudinally downward extending lugs  153  which cooperate with corresponding guides  168  in the top sub  124 . The anchor head  128  has longitudinally extending lugs  129  which extend under the reciprocating block  144  and cooperate with corresponding channels  141  defined in the interior surface of the top sub  124 . The lugs  129  contact corresponding faces  170  defined on the upper end of the lower reciprocating block  154 , forcing the lower block to move longitudinally downward. The anchor head has “no-go” or lug faces  145  which cooperate with corresponding no-go faces  172  defined on the upper end of the top sub  124  (not seen here). 
     The lower reciprocating subassembly  142  includes a slidably mounted connector block  154  which slides longitudinally within a recess or between guides defined in the top sub  124  of the lower tool assembly  120 . The lower connector block  154  is spring biased by biasing elements  156  towards a closed position. The lower fiber optic lines are carried in lower connectors  158 . The lower connectors  158  are attached to top sub  124  of lower tool assembly  120  and extend through corresponding holes  160  in lower reciprocating connector block  154 . Protective covers  162  are mounted on the reciprocating block  154  and positioned to cover the free ends of the connectors  158  (and the line ends held thereby) prior to connection. The covers  162  are biased towards a closed position, as seen in  FIG. 18 . The lower reciprocating assembly also includes an upper profile having a plurality of longitudinally extending guides  168  for contacting lugs  153  of the upper reciprocating block  144 . Key holes  166  are defined in the top sub  124  for cooperating with locking keys  132  of the operation locking assembly  110  of the upper tool assembly  100  (not seen here). Channel  141  is defined on the interior surface of the top sub to receive and cooperate with lugs  129  of the anchor head. 
     Anchor head  128  moves downward as upper connector block  144  is held in position by the upper profile of the top sub, causing relative movement between the block  144  and anchor head  128 . The holes  148  in reciprocating connector block  144  allow upper connectors  147  to maintain position relative to the reciprocating block, and the connector protective covers  152  are pulled along with upper block  144 , forcing the covers  152  to open revealing the free ends  149  of the connectors and fiber optic line ends. The longitudinally extending lug  129  of the anchor head  128  extends into corresponding channel  141  defined in top sub  124 . Lug  129  of the anchor head contacts corresponding lower connector block face  170  defined at the upper end of the lower connector block  154 . As the anchor head continues its downward stroke, the lug  129  forces the lower reciprocating block  154  to move downward. Movement of the block  154  pulls the attached covers  162  downward, thereby exposing the ends of the lower connectors and free ends  278  of the lower fiber optic lines. Biasing element  156  is compressed by this movement as well. The upper connectors  147  move relative to the mandrel  126  as production spring  234  pushes against sub  238  which itself is connected to the anchor head, as better seen in  FIG. 16 . The reciprocating block  144  slides relative to the anchor head and is prevented from continued downward movement and disconnection from the anchor head by one or more stop lugs (not shown) or similar extending outward from the exterior surface of the anchor head. 
       FIG. 21  is an alternate embodiment of a cover assembly for protecting the free end of a connector and communication line or other Point of Interest according to an aspect of the invention. The exemplary debris exclusion cover assembly  290  includes a base  292 , a debris exclusion cover  294 , and biasing elements (hidden, see  FIG. 18 ). The base  292  allows attachment to a reciprocating block. In this embodiment the base is a metallic tubular having a threaded connection for insertion into a mating threaded end of a reciprocating block, such as block  144  or  154 . A hex head  296  is provided to aid in connection. The cover  294  is preferably a rubber, plastic or composite material that can withstand downhole environments. The cover can be made of multiple pieces shaped to abut one another when in a closed position. The cover is biased closed by biasing elements. 
       FIG. 22  is an alternate embodiment of a cover assembly according to an aspect of the invention. Cover assembly  300  includes a collet assembly  302  with flexible collet arms  304  and dogs  306 . The dogs cooperate with a corresponding lip or profiles on a bore of the reciprocating block. The cover  308  is supported at the end of the assembly and is biased closed. 
       FIG. 23  is an alternate embodiment of a cover assembly according to an aspect of the invention. A cover assembly  310  has a snap ring  312  or similar at its base which cooperates with a corresponding shoulder or lip in the reciprocating block. The cover  314  is similar to those previously discussed and is biased closed. 
       FIG. 24  is an alternate embodiment of a cover assembly according to an aspect of the invention.  FIG. 25  is the alternate embodiment of a cover assembly seen in  FIG. 24  according to an aspect of the invention. The cover assembly  320  uses a cover  322  with axial folds  324  and is biased to a closed position, as shown, with a radially extending mouth  326  closed. In  FIG. 25 , the cover is in an open position with mouth  326  open and axial folds  324  in an unfolded position. 
       FIG. 26  is an alternate embodiment of a cover assembly according to an aspect of the invention.  FIG. 27  is the alternate embodiment of a cover assembly as in  FIG. 26  according to an aspect of the invention.  FIG. 26  presents a cover assembly  330  with overlapping flaps  332  mounted on a base  334 .  FIG. 27  is a cross-sectional view showing the overlapping feature of the flaps. The cover is biased closed. 
     It is anticipated that it will be desirable to remove the upper tool assembly at some point during the life of the well, to repair or replace parts, to run different tools or strings, etc. In such a case, it is desirable to protect the Points of Interest from environmental fluids, debris, and contaminants. Consequently, after or during disconnection of the connectors, the connector blocks, both upper and lower, are forced back to their initial positions such the covers are moved toward the connector free ends. In the preferred embodiment, the lower connector block  154  is moved to its initial or closed position by a biasing element such as springs  156 . The upper reciprocating block  144  is returned to its initial or closed position mechanically by a lug  143  for that purpose extending radially outward from the exterior surface of the mandrel  126 . The covers, also biased to a closed position, close over the free ends of the fiber optic lines, thus protecting them during pull out of hole. The reciprocating debris exclusion assembly can be used repeatedly in well operations. 
     The methods and steps for removal of the upper tool assembly are briefly described and will be understood by those of skill in the art. The work string is pulled towards the surface (upwards in a vertical well) from the surface rig with enough force to pull the collet dogs  202  out of profile  200  in the scoop head. The resetting spring  206  is then free to expand as the work string is pulled further upwards. The metering assembly operates similarly to that described above but with the metering fluid and piston moving in the opposite direction. The metering fluid travels from chamber  218  to chamber  214 . Keys  240  move radially outward to allow the mandrel  244  to move upward with the work string. Spring  234  expands. Sub  238  contacts mandrel  122 . Anchor head  128  is then pulled away from the top sub  124 . This releases lower block  154  and allows springs  156  to extend and move block  154  to cover the lower connector ends. The lower protective covers  162 , due to the biasing elements therein, are moved to a closed position over the free ends of the lower connectors. As anchor head is moved upward relative to the mandrel  126 , lug  143  extending radially outward from the exterior surface of the mandrel  126  contacts and pulls the reciprocating block  144  downward, back to its initial or closed position. The upper connector covers  152  return to a closed position over the free ends of the connector lines due to the biasing force of the biasing elements acting thereon. As anchor head  128  moves upward relative to mandrel  126 , prop  130  is pulled from under keys  132 , leaving the keys unsupported. The unsupported keys move radially inward, releasing the upper tool assembly and work string from the top sub of the lower tool assembly. 
     The reciprocating debris exclusion device disclosed herein can be used in combination with other tool assemblies; that is, with work strings made up for a different purpose, on coiled tubing or wireline, and to perform other functions which require the protection from debris of Points of Interest. The invention is limited only by the claims. 
       FIGS. 28-30  are drawn to another embodiment of an exemplary debris exclusion device for protecting the free ends of connectors, communications lines, and other Points of Interest. 
       FIG. 28  is a side view in cross-section showing a reciprocating debris exclusion device  400  according to an aspect of an invention disclosed herein.  FIG. 28  is a schematic and does not attempt to show various details of construction and operation. An upper connector assembly  402  and lower connector assembly  404  are seen in a disconnected position, just at contact as the assemblies are moved together. 
     The upper connector assembly  402  has a housing  406  with an upper connector  408  attached thereto and extending longitudinally therefrom. The connector is seen connected to the housing, such as at threads  410 , and holds the free end  403  of a communication line  412  which runs to the surface, other downhole tools or sensors, etc. In the embodiment shown, the connector  408  remains stationary with respect to the housing, however, alternative arrangements can be used wherein the connector also moves relative to the housing, such as on a sliding block, biased element, etc. An upper connector cover  414  is initially in a closed position and protects the free end of the connector and communication line from debris and damage. The cover  414  has a flange  415  at its base  416  and is supported by a biasing element such as spring  418 . The cover base  416  is preferably cylindrical and positioned exterior to a support cylinder  420  extending from the housing. The biasing spring  418  abuts a shoulder  419  defined on the housing at one end and a surface of the flange of the cover at the other end. As the cover reciprocates between a closed and open position, the cover slides with respect to and is supported by the support cylinder  420 . In one embodiment, the interior chamber  421  defined by the upper cover is filled with a clean fluid, such as a heavy dielectric fluid. 
     The lower connector assembly  404  has a housing  422  with a lower connector  424  attached thereto. The connector is seen connected to the housing, such as at threads  426 , and holds the free end  427  of a communication line  428  which runs other downhole tools or sensors, etc. In the embodiment shown, the connector  424  remains stationary with respect to the housing, however, alternative arrangements can be used wherein the connector moves relative to the housing. A lower connector cover  430  is initially in a closed position and protects the free end of the lower connector and lower communication line from debris and damage. The cover  430  has a flange  432  at its base, where it is attached to the housing  422 . The closed cover  430 , housing  422 , and connector  424  end define a chamber  434  into which the free end of the communication line  428  extends. The chamber is preferably filled with a heavy dielectric fluid or other clean fluid. 
       FIG. 29  is a side view in cross-section of the reciprocating debris exclusion device of  FIG. 28  in a contact position according to an aspect of an invention disclosed herein. In  FIG. 29 , the upper and lower assemblies are in contact and the upper connector cover  414  has contacted and penetrated the lower cover  430 . Preferably the lower cover  430  is made of an elastomeric or flexible material such as rubber or plastic. The lower cover  430  can be a bladder, having no pre-existing holes, slits, cuts, folds, etc., or can have one or more pre-existing cuts such as seen in the covers disclosed elsewhere herein. Where the lower cover has pre-existing cuts, preferably a biasing element, such as seen elsewhere herein, biases the cover towards a closed position. In the preferred embodiment, the upper cover  414 , still in its closed or initial position, penetrates the lower cover  430 . The upper cover  414  is preferably made of a harder material than the lower cover, such as a metal, relatively hard plastic, rubber, etc. The upper cover is preferably comprised of a plurality of flaps or “petals”  413  which mate together in the closed position to protect or isolate the communication line end. The upper cover penetrates the lower cover and extends into the lower chamber  434 . The upper cover flange  415  is sized and positioned to contact an annular stop-surface  436  defined on the lower assembly housing  422 . 
     During positioning, the lower cover  430  wipes any contaminates from the exterior of the upper cover  414 . Additionally, as the upper cover enters the lower chamber  434 , the clean fluid therein is flushed out of the chamber, washing the exterior surfaces of the upper cover. 
       FIG. 30  is a side view in cross-section of the reciprocating debris exclusion device of  FIG. 29  in a connected position according to an aspect of an invention disclosed herein. In  FIG. 30 , the upper and lower assemblies have been moved together and the communication lines, or wet-mates, are connected, allowing communication between the lines. The upper cover  414 , at flange  415 , contacts the stop-surface  436  of the lower housing  422  and moves relative to the upper housing  406  and connector  408  as the assemblies are moved toward one another. The upper cover  414  is now forced to an open position by the support cylinder  420  of the upper assembly. The preferred upper cover  414  has its plurality of folds or petals  413  forced open by the support cylinder  420 . As the upper cover and support cylinder move relative to one another, the biasing spring  418  is compressed between shoulder  419  and flange  415 . The upper and lower covers are “wiped” or moved toward or against the lower chamber wall fully exposing the free end  403  of the upper line  412 . The upper and lower connectors are brought together by relative movement of the assemblies and communication is established through the line. The connector ends remain surrounded by clean fluid. 
     During disconnection, the upper assembly is pulled away from the lower assembly, the upper and lower lines disconnect, and, as the support cylinder is withdrawn from the lower chamber, the upper cover is forced back to its initial position by spring  418 . In an embodiment where the upper cover is biased to a closed position, the upper cover closes over the end of the connector  408 . Where the lower cover is resilient or biased towards a closed position, the lower cover returns towards its initial or closed position thereby protecting the lower connector. The embodiment shown is exemplary in nature. In other embodiments, where multiple disconnects and re-connects are anticipated, clean fluid reservoirs (not shown) can supply additional fluid during disconnection. For example, fluid can be pulled from the reservoirs by the suction caused during separation of the assemblies, thereby refilling the fluid chambers. Other arrangements will be apparent to those of skill in the art. 
     In preferred embodiments, the following methods are disclosed; the steps are not exclusive and can be combined in various orders, with steps omitted, repeated and/or performed in different order. A first downhole assembly, having a first connector with a free end of a first communication line fixed thereto, is positioned at a downhole location in the wellbore. A second downhole assembly, having a second connector with a free end of a second communication line fixed thereto, is moved into the wellbore and relative to the first downhole assembly. A first reciprocating member, mounted for movement on the first downhole assembly, is moved from an initial position to an actuated position, the first reciprocating member moving relative to the first connector. A second reciprocating member, mounted for movement on the second downhole assembly, is moved from an initial position to an actuated position, the second reciprocating member moving relative to the second connector. A first protective cover, attached to the first reciprocating member, is moved from an initial position, wherein the free end of the first communication line is protected from debris, to an open position, wherein the free end of the first communication line exposed. A second protective cover, attached to the second reciprocating member, is moved from an initial position wherein the free end of the second communication line is protected from debris to an open position wherein the free end of the second communication line is exposed. The first and second connectors are connected, establishing communication across the free ends of the first and second communication lines. The preceding steps can be accomplished in various orders, as will be clear upon review of the disclosure herein and as will be clear to persons of skill in the art. After use, the first and second connectors are disconnected. The first reciprocating member is returned to its initial position and the first cover is returned to its initial position wherein the free end of the first connector is protected from debris. Similarly, the second reciprocating member is returned to its initial position and the second cover is returned to its initial position wherein the free end of the second connector is protected from debris. 
     The steps during connection are in response to moving the second downhole assembly toward the first downhole assembly. The communication lines can be fiber optic, copper, or hydraulic lines. The second downhole assembly can be lowered on a work string, coiled tubing or wireline, for example. The method described, further comprising the step of positioning, in an interior space defined by a first mandrel of the first downhole assembly, a second mandrel of the second downhole assembly. The method described, further comprising the step of rotationally aligning the first and second downhole assemblies relative to one another. The method described, further comprising the step of contacting the first reciprocating member with the second downhole assembly and moving the first reciprocating member relative to the first connector in response to movement of the first downhole assembly. The method described, further comprising the step of contacting and moving the first reciprocating member with a selectively sliding sleeve mounted for longitudinal movement with respect to the second mandrel. The method described, further comprising the step of energizing a biasing element operable to move the first reciprocating member towards its initial position. The method described, further comprising wherein the sliding sleeve is an anchor head mounted slidingly on the second mandrel. The method described, further comprising, wherein the first reciprocating member is mounted for sliding movement on the first mandrel. The method described, further comprising, wherein the first connector is positioned in holes extending through the first reciprocating member. The method described, further comprising the step of contacting the second reciprocating member with the first downhole assembly and moving the second reciprocating member relative to the second connector in response to movement of the first downhole assembly with respect to the first downhole assembly. The method described, further comprising the step of contacting and moving the second reciprocating member with an actuating surface of the first downhole assembly. The method described, further comprising, wherein the actuating surface is a top surface of a bottom sub of the first downhole assembly. The method described, further comprising, wherein the second reciprocating member is mounted for movement on a selectively sliding sleeve of the second downhole assembly, and wherein the selectively sliding sleeve is mounted for movement on the second mandrel. The method described, further comprising, wherein the selectively sliding sleeve is an anchor head and acts to anchor the first and second downhole assemblies to one another. The method described, further comprising, wherein the first and second covers comprise multiple radially movable sections, the sections abutting one another when in an initial position and movable to an open position for exposing the free end of a communication line. The method described, further comprising, wherein the first and second covers are biased towards an initial closed position. The method described, further comprising, wherein the covers are biased by metal beam members attached to a circumferential base. The method described, further comprising, wherein the first and second covers are attached to their respective reciprocating members by a flange, a collet assembly, or a snap ring. The method described, further comprising, wherein the first and second covers each have axial folds defining adjacent cover sections. The method described, further comprising, wherein the first and second covers each have overlapping adjacent cover sections. The method described, further comprising, wherein the first and second connectors are wet-mate connectors. The method described, further comprising, wherein the step of disconnecting further comprises the step of pulling the second downhole assembly uphole. The method described, further comprising the step of returning the first reciprocating member toward its initial position using a biasing element. The method described, further comprising the step of returning the second reciprocating member towards its initial position using a lug extending from the second mandrel. The method described, further comprising the step of pulling the second downhole assembly out of the wellbore. 
     In another embodiment, an apparatus for excluding debris during a downhole wet-mate connection is presented. The apparatus includes a first downhole assembly having a housing, a first connector attached to the housing, a first communication line attached to the first connector, and a reciprocating cover member mounted for sliding engagement with the first housing. A second downhole assembly is provided, having a housing, a connector attached to the housing, a communication line having a free end attached to the connector, and a bladder cover member attached to the housing. The reciprocating cover member is moveable between a closed position, wherein the free end of the communication line is substantially enclosed, and an open position in which the free end of the communication line is exposed. The reciprocating cover member is moved in response to contact with the second downhole assembly. The bladder cover member is movable between a closed position, in which the bladder cover member substantially closes an otherwise open end of a housing chamber defined in the second downhole assembly, and an open position, wherein the bladder cover member is moved to open the open end of the housing chamber. The bladder cover member is moved to the open position by contact with the reciprocating cover member of the first downhole assembly. The reciprocating cover member can be biased towards the closed position by a spring element. The reciprocating cover member is preferably slidably mounted on the housing, such as slidably mounted on a cylindrical extension of the housing. The reciprocating cover member is preferably operable to move the bladder cover member to the open position. The reciprocating cover member is preferably operable to, prior to moving to an open position, move into the housing chamber. The housing chamber and the reciprocating cover member are preferably filled with a clean fluid, such as a dielectric fluid. The reciprocating cover member is preferably operable to move in response to relative movement of the first and second downhole assemblies. The housing of the second downhole assembly can define a surface for contacting and moving the reciprocating cover member axially. In a preferred embodiment, the connector of the first assembly is operable, in response to movement of the reciprocating cover member, to force open the reciprocating cover member. The bladder cover member can have pre-formed cuts, be made of elastomeric material, be spring biased toward the closed position, etc. The reciprocating cover member is preferably made of metal or other material stronger than the bladder cover. The reciprocating cover member is preferably biased towards a closed position. Additionally, the apparatus can include clean fluid reservoirs for re-filling the housing chamber and/or reciprocating cover member upon disconnection of the communication lines. The apparatus can provide clean fluid to the housing chamber or reciprocating cover member in response, for example, to suction pressure created during disconnection of the assemblies. 
     Exemplary methods of use of the invention are described, with the understanding that the invention is determined and limited only by the claims. Those of skill in the art will recognize additional steps, different order of steps, and that not all steps need be performed to practice the inventive methods described. 
     Persons of skill in the art will recognize various combinations and orders of the above described steps and details of the methods presented herein. While this invention has been described with reference to illustrative embodiments, this description is not intended to be construed in a limiting sense. Various modifications and combinations of the illustrative embodiments as well as other embodiments of the invention, will be apparent to persons skilled in the art upon reference to the description. It is, therefore, intended that the appended claims encompass any such modifications or embodiments.