Abstract: The present invention relates to a wiper plug and internal drop ball mechanism that may be used in conjunction with a downhole surge reduction tool to run, hang, and cement casing liners in a wellbore. The apparatus of the present invention comprises a wiper plug assembly removably attached to the drill string within the casing liner, a drop ball sub attached below the wiper plug assembly which releases a float valve actuator ball having a diameter larger than the drill string, and float equipment having a plurality of flapper valves. The apparatus of the present invention may further comprise a diverter tool connected between the drill string and the casing liner.

Abstract: An apparatus and method for delivering a liner wiper plug into a well bore on a workstring with a liner pipe, releasing the wiper plug from the workstring, and giving a positive indication of release of the wiper plug. A sleeve captures a collet to a latch ring until a plug is pumped down the workstring to cause a pressure buildup, which shears a shear screw, allowing the sleeve to shift, releasing the latch ring and the wiper plug from the workstring. A rupture disk is provided in the event of jamming of the apparatus, to allow pressurization above the wiper plug, shearing a weak link in the latch ring to release the wiper plug.

Abstract: A composite landing collar is disclosed which is preferably adhesive bonded to the liner string using a high temperature epoxy. The spacing during bonding is maintained within dimensional limits using spacers. The body features a bi-directional material, with an appropriate ratio in the warp and fills directions, for about a quarter of the wall thickness. A unidirectional material with the fibers axially aligned aids in reduction of thermal stresses in the thick wall during curing, as well as reducing shear stress concentration along the adhesive bonding interface.

Abstract: A method to set a hollow device into an undersea flow pipe uses a flexible pig driven by a flow flowing into said flow pipe to displace a hollow device to a point where a stop means halts a displacement of said hollow device, thereby setting said hollow device into position. A method to retrieve a hollow device into an undersea flow pipe uses a flexible pig driven by a flow flowing into said flow pipe to retrieve said hollow device from a location where said hollow device operates halted by a stopping means.

Abstract: A check valve assembly for the bottom of a casing string with increased open area is provided. Multiple check valves are provided for assurance of ultimate closure. Bypass flow paths are available during run in that increase the normal available open area from about 3 square inches to a range of about 10 square inches and even higher. Components freely float during run in to provide the greater open area and are subsequently repositioned with known techniques of dropping a ball and pressurization when the casing has reached the desired depth.

Abstract: An oil field assembly for gathering data about or producing an oil well having a self regulating assembly for free movement by gravity or the differential pressure of fluids in the tubing string of a well from the surface of a well or to predetermined down hole positions for collecting data and or producing a well while freely moving between the surface of the well and predetermined positions comprising a self regulating traveling piston for free movement by gravity and or the differential pressure of the fluids of a well from the surface of a well and to predetermined positions for collecting data about a well between the surface and predetermined downhole positions, and having instrumentation connected to the traveling piston for gathering data about the well, and a landing housing located at the surface of a well for receiving the traveling piston, and a receiving station at the bottom of the tubing string for releasably receiving the traveling piston.

Abstract: Apparatus for the remote deployment of one or more valves (1), comprising channel means (2) through which the valve (1) will be deployed, channel location means (3) in which the valve (1) will sit, seal means (4) to seal between the valve (1) and the channel means (2), valve location means to seat the valve (1) onto the channel location means (3), and valve means (6) to control the passage of fluid.

Abstract: A subsea lifting top drive cement head in which cement flows from the top. The cement head includes lower and upper assemblies with a bore for fluid flow, and a body in sure lock connection with the lower and upper assemblies and having a dart cage to prevent a dart inside the dart cage from being washed away by the cement flow. In addition, the cement head includes a ball dropper that does not need to be retracted prior to releasing the dart.

Abstract: A wiper plug launching tool includes a body arranged to be lowered into a liner on a running string, the body having a tubular upper portion and a cylindrical lower portion, upper and lower wiper plugs loaded into the lower portion, each of the plugs having upwardly facing elastomer cups that are reduced in diameter during loading, a drive rod movably mounted in the upper portion of the body, a first piston or dart that is pumped down the running string and into engagement with the drive rod so that pressure applied to the first dart forces the rod downward to cause ejection of the lower wiper plug into the liner where cups of the plug expand to provide a moving seal at the lower end of a column of cement, and a second piston or dart that is pumped down into engagement with the first dart to force the rod further downward and cause ejection of the upper wiper plug into the liner where the cups of this plug expand to provide a moving seal at the upper end of the column of cement.

Abstract: The apparatus of the present invention is a mechanism for use in cementing a casing string in a well bore comprising a float collar connectable to the casing string, a cement plug engagable to the float collar, and a wiper plug engagable to the cement plug, each element utilizing inclined plane J-slots for engagability. When engaged, the J-slots disallow not only rotational movement between the elements, but also vertical movement between the elements.

Abstract: A plurality of electronically controlled downhole tools and systems for use in production wells is presented. These tools and systems include safety valve and pressure monitoring systems, remotely controlled inflation/deflation devices, remotely actuated downhole tool stop systems, remotely controlled fluid/gas control systems, remotely controlled variable choke and shut-off valve systems and a retrievable sensor side pocket mandrel.

Abstract: The present invention provides an improved subsurface release cementing plug apparatus for use in a string of pipe during the cementing of the pipe in a well bore. The apparatus includes a hollow cementing plug seat member adapted to be connected in the string of pipe near the bottom thereof and a cementing plug assembly releasably connectable to a circulation tool or casing running tool in the top of the string of pipe. The cementing plug assembly includes a top cementing plug having an external annular seating surface formed thereon for sealingly engaging a top internal annular seating surface of the cementing plug seat member, and a bottom cementing plug releasably connected to the top cementing plug having an external annular seating surface formed thereon for engaging a bottom internal annular seating surface of the cementing plug seat member.

Abstract: A new cementing system has been developed which includes, in certain embodiments, a plug container with a flow diverter for diverting a portion of flowing fluid away from plugs in the plug container; a plug set system with internal sleeves or dart receivers with shearable parts for shearing to selectively release plugs--all in certain embodiments made of non-metal material and/or plastic; and a swivel equalizer with internal valving to isolate a plug set (or any other item) from torque and to relieve pressure below the swivel equalizer.

Abstract: A high pressure well cementing plug assembly for use in a pipe during the cementing of the pipe in a well bore is provided by the present invention. The assembly basically comprises top and bottom cementing plugs which include high strength inner tubes for supporting high differential pressures exerted on the plugs. The bottom end of the inner tube of the bottom plug is adapted to supportingly engage a float shoe or the like upon landing. Also, the bottom end of the inner tube of the top plug and the top end of the inner tube of the bottom plug are adapted to supportingly engage each other when the top plug lands on the bottom plug. The high strength inner tubes support high pressure differentials exerted on the plugs and prevent the plugs from collapsing or otherwise being damaged.

Abstract: Cementing plugs for use in the cementing of casing in oil and gas wells. The cementing plugs are well-suited for use with a polycrystalline diamond compact drill bit.

Abstract: An anti-rotation device for use in a well tool, for example a top plug or a bottom plug, has a tapered male member having a corrugated outer surface which can enter a corresponding recess in another well tool to inhibit relative rotation therebetween.

Abstract: A system is provided for deploying, operating and recovering well tools through flow lines. A system is also provided for deploying, operating and recovering a through flow line production logging system, the preferred system being characterized by the use of a time delay assembly in combination with a locking locator assembly and cooperating reach members with connecting collars disposed between a pump down transport assembly and the production logging tool.

Abstract: Well apparatuses with device for preventing their relative rotation with respect to adjacent well apparatuses and anti-rotation devices for well apparatuses, including, but not limited to, plugs, float shoes, float collars, jars, and clutch devices for packers. In one embodiment self-aligning non-rotation devices are provided with body members having protrusions extending from recesses therein, the protrusions and recesses configured and disposed so that two opposed devices which initially misalign will co-act to align themselves. In another embodiment an intentional "sloppy fit" is provided between two opposed devices to facilitate device contact and co-action. In various embodiments unwanted separation of two devices is prevented due to the configuration of protrusions.

Abstract: There is disclosed an assembly of parts for use in cementing a casing string in a well bore comprising a float collar connectible as part of the string, a cement plug lowerable onto the collar, and a wiper plug lowerable onto the cement plug, the lower end of the cement plug having threads for limited make-up with threads on the upper end of the collar and the lower end of the wiper plug having threads for limited make-up with the cement plug, so as to limit rotation between them.

Abstract: A method of cementing oil well casings and a cementing tool used when performing the method are provided. A novel top cementing plug functions in a conventional manner during proper oil well casing cementing operations, but if inserted into the oil well casing in error, allows cement to be pumped through it. The top plug includes an outer, hard rubber casing having vertically spaced fins formed about its circumference. A central passage is provided through the outer casing and receives a cylindrical, metal sleeve. In one embodiment, a bore is formed in a portion of the metal sleeve to define a shoulder within the sleeve. The bore receives a cylindrical housing which carries a spring loaded, ball valve mechanism. The valve mechanism includes an annular spring retainer which rests on the shoulder. One end of a helical spring within the housing contacts the retainer while the other end of the spring biases a ball against an annular flange at the top of the housing to seal the passage.

Abstract: In accordance with an illustrative embodiment of the present invention, a positively operable stop collar for providing a bridge in a well casing that prevents reverse flow of cement slurry includes a tubular body having upper and lower stop rings positioned in upper and lower recesses therein, seal rings between the recesses, and a bevel on the upper stop ring that is engaged by an inclined surface on the drive plate of a displacement plug to expand the upper stop ring and allow the drive plate to pass through the upper stop ring and to be locked in engagement with the seal rings.

Abstract: Cement plugs used in the cementing of casing in a borehole drilled into a subterranean formation are restrained from rotation by being forced into a portion of the casing and check valve apparatus which includes a reduced diameter section formed as a continuous annular liner of material having a coefficient of friction. Compression of the plug against the high-friction liner avoids rotation of the plugs when they are drilled subsequent to the cementing operation.

Abstract: Pumpdown toolstring for performing operations requiring application of power downhole in horizontal or high-deviation oil or gas wells, comprising an elongate toolstring element (30), locomotive devices (31, 32A) on said toolstring element, with at least one locomotive device (32) provided at a trailing or top end of the toolstring element (30). The toolstring element (30) is tubular and has a closed leading or bottom end, whereas it is open at the opposite, top end. The leading locomotive device, (31) adapted to pull the toolstring element during pumping down, has a seal for co-operation with a seat at a no-go or nipple assembly at the bottom end of a tubing from which an extension tubing extend into the horizontal or high-deviation well. The leading locomotive device (31) sealingly surrounds the toolstring element (30) and allows sliding of the toolstring element there-through when engaging the seat.

Abstract: Well apparatuses with device for preventing their relative rotation with respect to adjacent well apparatuses and anti-rotation devices for well apparatuses, including, but not limited to, plugs, float shoes, float collars, jars, and clutch devices for packers. In one embodiment a non-rotation device has a main member with a recess on which are disposed a plurality of teeth with a load member adjacent the teeth for bearing a load put on the device and for isolating the teeth from the load, the teeth extending beyond the recess. In one embodiment the teeth are configured, disposed, and profiled to facilitate their interengagement with other teeth and to contain between them foreign objects which might impede proper interengagement. In various embodiments plugs are provided with such anti-rotation devices. In various embodiments the load member is a continuous circular ring disposed about the apparatuses outer periphery or around the opening of a channel through the device.

Abstract: In accordance with illustrative embodiments of the present invention, a ball injecting apparatus for use in launching cementing plugs into a well casing includes a tubular body having an inlet port and one or more cylinders on the sides thereof adapted to be loaded with the balls, gates on the cylinders to prevent and permit injections of the balls, drive members extending into the upper and lower ends of the body and being rotatable relative thereto, and a sleeve slidably splined to the upper drive member and movable downward in the body in response to fluid pressure to transmit rotation of the upper drive member to the lower drive member. A set of uniquely arranged upper and lower plug assemblies are releasable attached to one another and are arranged to be sequentially released in response to seating of a ball, bomb or a dart therein.

Abstract: The present invention provides an apparatus for cementing a liner string in a well bore. The apparatus comprises an operating string having a smaller diameter than the internal diameter of the liner string which is insertable therein. The operating string is connected within the internal diameter of the liner string and may be operated by rotation of the operating string to release the string from the liner. A plug is connected to the lower end of the operating string and has a top plug which is releasably supported from the plug carrying body together with a longitudinally spaced bottom plug which is releasably supported from the top plug. The top plug is pressure releasable relative to the plug carrying body, as is the bottom plug to the top plug, and a retainer on the bottom plug, respectively. A shift is provided for locking the top plug to the plug carrying body until the bottom plug is released by application of pressure.

Abstract: A single wiper is releasably and sealably positioned adjacent the lower end an operating string and locked therewith to prevent premature release from the operating string upon manipulation of the operating string. The sealing relationship between the wiper and the operating string prevents communication of operating string pressure from the operating string to the resilient ribs of the wiper adjacent the position of the wiper on the operating string. When a pump down plug is sealably seated within the bore of the wiper, fluid pressure is confined to act on a piston between the operating string and the wiper to unlock the wiper from the operating string so that it may be released therefrom.

Abstract: Well apparatuses with device for preventing their relative rotation with respect to adjacent well apparatuses and anti-rotation devices for well apparatuses, including, but not limited to, plugs, float shoes, float collars, jars, and clutch devices for packers. In one embodiment a non-rotation device has a main member with a recess on which are disposed a plurality of teeth with a load member adjacent the teeth for bearing a load put on the device and for isolating the teeth from the load, the teeth extending beyond the recess. In one embodiment the teeth are configured, disposed, and profiled to facilitate their interengagement with other teeth and to contain between them foreign objects which might impede proper interengagement. In various embodiments plugs are provided with such anti-rotation devices. In various embodiments the load member is a continuous circular ring disposed about the apparatuses outer periphery or around the opening of a channel through the device.

Abstract: A displacement plug injection apparatus and manifold for sequentially injecting cementing plugs into the casing in an oil or gas well to reduce contamination of the interface between the well fluid and the cement, which apparatus includes an injection manifold for injecting pick-up balls into the fluid stream which pass through an inlet port in the casing to selectively pick-up cement displacement plugs in a plug set which are suspended or held in place with in the casing to be cemented. A positive mechanical indication of the injection of each pick-up ball is apparent and in adition a secondary magnetic sensor indicates a passage of a pick-up ball into the throat provided above the set of displacement plugs to indicate the beginning of the launch of each plug in the plug set. Also disclosed is a new and improved check valve apparatus for use in float collars and cementing shoes used in casing cementing operations.

Abstract: Float equipment for well operations including float collars and plugs for use therein. In one embodiment a plug has a plurality of modular members so that a plug of desired dimensions and materials can be custom assembled for a particular job. Such a plug may include a plurality of modular wipers and spacers connected together with a plug top and a plug bottom with adhesives or connection means or both. Not only can such connection means provide an antirotation effect between adjacent plug components, but also combinations of lugs and recesses can achieve this. Also a plug is taught which can have a cavity therein with pieces of material for enhancing a plug's drillability.

Abstract: An operating string O is provided for conducting cementing operations in a well bore.The operating string O is shown sealably and releasably connected with a liner L and extends through upper liner wiper means 45 and terminates in overlapping relationship to lower liner wiper means 26, both of which wiper means 26 and 45 are releasably secured to the operating string O with the lower liner wiper means 26 releasably secured below the upper liner wiper means 45 so that its bore 28a originates adjacent and extends away from the lower end of the upper liner wiper means 45.The operating string O includes positioning means H to hang the liner L on well bore casting C, and means 145, 146 and 148 to rotate and reciprocate the liner L before hanging it and/or to rotate the liner L during and after cementing.

Abstract: Connectors for connecting coilable tubing and other relatively thin walled tubing strings to downhole tools are provided which are releasable to permit withdrawal of the tubing without a member connected to the tubing that is substantially larger in diameter than the tubing itself. One embodiment of the connector includes a body member having plural collet fingers which are engagable with the tubing distal end through cooperating circumferential grooves and lands. The collet fingers are retained in gripping engagement with the tubing by a retainer sleeve having a piston head which catches a pump down ball to block a flow passage in the retainer and allow a fluid pressure force to shear plural shear screws which hold the retainer in the finger engaging position. Alternate embodiments includes recesses formed in the wall of the tubing for receiving ball keys which are held in registration with the recesses by the connector body and a cooperating slidable sleeve member.

Abstract: The plug set of the present invention comprises an upper plug having a non-rotation insert retained therein and a lower plug having two non-rotation inserts retained therein. The present invention further includes the use of a non-rotation insert in the floating equipment with which the plug set of the present invention is used.

Abstract: The present invention relates to a method and apparatus for cementing a liner in a well bore having a casing wherein the liner is connected to a running tool and includes hanger means for securing the liner to the casing in the well bore. The liner includes an upper and lower liner portion each having port means therein and means to lock the telescoping liner portions against relative longitudinal movement to prevent premature actuation or operation of the port means.The liner portions provide a mechanically actuated port arrangement to be employed with first and second liner wiper means and first and second pump down plug means for cementing above a packer on the lower liner portion, or for providing dual stage cementing.

Abstract: A TFL assembly is disclosed for use in a dual diameter flow-line/riser system which includes a small diameter flow-line section and a large diameter riser section. The assembly comprises a pig fitting in the small diameter flow-line section and a pig catching tool fitting in the large diameter riser section. The pig catching tool comprises a central opening which is sealed off by the pig upon joining said pig and tool after entry of the pig from the small diameter flow-line section into the large diameter riser section.

Abstract: A well production system utilizing a submersible pump in which a parking mandrel is slidable around a flexible line and connected to the top of a string of test tools carried by the line. When the tools and mandrel are lowered into the well, the mandrel locks in a landing nipple in tubing below the pump. Pull on the line operates the mandrel and disconnects the tools to be lowered on the line through the mandrel to a deeper depth at which the well may be tested. The parking mandrel includes a pressure operated grease injector section. The well pump may be operated while testing the well increasing pressure sufficiently to operate the grease injector and seal the parking mandrel around the line. After well testing is completed, the line and tools are raised back to the parking mandrel and reconnected to the mandrel by pulling on the line. The parking mandrel may now be unlocked from the landing nipple for return to surface by lowering the line and then pulling the line again.

Abstract: An apparatus and method are shown for cementing a liner in a well bore. An operating string of smaller diameter is inserted within the internal diameter of the liner. A setting tool initially connects the operating string within the liner and includes a plug carrying body at the lowermost extent. A top plug is releasably supported from the plug carrying body and a longitudinally spaced bottom plug is releasably supported from the top plug. A collet latch secures the top plug to the plug carrying body and a collet latch secures the bottom plug to the top plug. A shiftable sleeve positively locks the top plug to the plug carrying body until the collet latch securing the bottom plug is released.

Abstract: An hydraulic lock alleviation device a well cementing stage tool with such a device, and related methods for their use. The device has a channel for transmitting trapped fluid which causes a hydraulic lock from the trapped area to another area. The channel is blocked by a pressure responsive member which ruptures, moves, breaks, or is punctured to permit trapped fluid to glow from the area of hydraulic lock. In one embodiment of a stage tool with such a device, a puncture apparatus can be moved to puncture the pressure responsive member. In other embodiments, a movable piston or spool is mounted in the channel for movement to permit the flow of trapped fluid.

Abstract: A method and apparatus for indicating the position of a cement wiper plug in a wellbore during liner or casing cementing operations. The arrival of the cement wiper plug at a shearable, temporary restriction means in a pipe string is sensed by an increase in pipe string pressure at the surface. Using the knowledge of the location of this shearable, temporary restriction means, a determination of whether or not it is desirable to displace the cement wiper plug to a landing assembly at the bottom of the pipe string can be made. A predetermined amount of displacing fluid, sufficient to either completely or partially displace the cement wiper plug to the landing assembly, can then be introduced into the pipe string.

Abstract: A cementing system using a tubular member 43 coupled to a string of tubing 14 where upper and lower tubular liner wiper plugs (20, 21) are independently attached to and separately releasable from the tubular member. The upper tubular liner wiper plug 20 has outer liner wiper seal members, an outer latching mechanism (95) and an inner latching mechanism (52). A fluid bypass (59) is located in the liner wiper plug (20) below the wiper seal members with a check valve structure for bypassing fluid from below the seal members to the bore (45) of the tubular member in response to a pressure differential. A second check valve structure (46) is provided in the tubular member to provide a fluid bypass from the exterior of the tubular member above the seal members to the interior of the tubular member in response to a pressure differential.

Abstract: A side-entry connection for incorporation in pipe strings, such as a drill-pipe string, and for sealingly passing a cable from the inside to the outside of the pipe string is disclosed. The side-entry connection comprises a connection sub and a sleeve which is slidable inside the axial bore of the connection sub between a top position above said cable entry and a low position in which the sleeve closes said cable entry. Means are provided for retaining the sleeve in each of said positions, and the sleeve includes cutting means at its lower end for severing the cable when the sleeve is moved to its lower position. A retrievable plug is used to close the top of the sleeve and hydraulic pressure is applied to the plug from the surface so as to move the sleeve from its top position to its low position for closing the side entry and for severing the cable.

Abstract: Methods of gravel packing a subterranean well located subsea utilizing through-the-flowline techniques are disclosed in which a sand slurry is pumped downwardly through one pipe of a dual pipe string and outwardly through an H-type crossover member (14, 15) into a perforated casing area (20) until the area is fully packed. In one method, the H-type crossover member (14) is provided with a flangible plug (14h) to allow bypass of the sand slurry once the perforated casing area is filled with aggregate. In another method, the gravel packing of the perforated casing area is accomplished utilizing a special TFL tool (25) which provides for injection of the sand slurry through an H-type crossover member (15) into the perforated casing area (20).

Abstract: An apparatus and method for inserting flow control means into a well casing is disclosed. A receptacle having portions adapted to receive check valve means is mounted within said well casing and said well casing is inserted into a well. Check valve means may be pumped down into engagement with said receptacle to regulate the flow of fluid through the well casing. Alternatively, choke valve means may be pumped down into engagement with said receptacle instead of check valve means. The choke valve means may be constructed having portions adapted to receive check valve means so that check valve means may be pumped down into engagement with said choke valve means to regulate the flow of fluid through the well casing.

Abstract: A tool stopping device for use in well flow conductors for stopping well tools moving therethrough, these devices being located at desired checkpoints, their arrival thereat indicating the progress of the tools in the flow conductor, each device having lugs movable between an inner, tool stopping position and an outer position in which they do not obstruct the bore of the device, each device also having a mechanism remotely actuable from the surface for moving the lugs between their outer and inner positions, whereby tools may be stopped by the lugs when in their inner position, after which the lugs may be moved to their outer position to free the tools for movement beyond the device. In some forms of the devices, the lugs may stop tools in position where they are to be locked in place. In another form, the tools are stopped by a shoulder in the device and the lugs are then contracted to anchor the tool in engagement with that shoulder.

Abstract: A pump out sub for use in a well tubing for receiving a plug for sealing the tubing and applying pressure to the tubing for actuating a well device and thereafter applying a higher pressure to pump out the plug and open the bore. A circular ring is connected in a recess in the bore of the body by shear pins. An expandable seat is positioned in a second recess above the first recess and extends into the bore for receiving a plug and is positioned above and supported from the circular ring. When a plug is seated on the seat pressure may be applied to the tubing for actuating well tools. Thereafter additional pressure is applied to the plug and the ring and the seat moves downwardly and the seat expands into the first recess and out of the bore.

Abstract: A tool stopping device for use in a well flow conductor having a preferably full open bore and an abrupt stop shoulder surrounding the bore and engageable by corresponding stop shoulders of spring biased keys carried on a well tool for stopping the well tool as it moves through the flow conductor to indicate the tool's arrival at the device, the device having lugs remotely actuable from the surface for releasing the keys from engagement with the stop shoulder in the device for movement of the well tool therebeyond. One form of the device is suitable for stopping tools entering from one direction only. Another form of the device is suitable for stopping tools both moving into and out of a well. Either or both types of devices may be used in any quantity to provide known checkpoints in a well system for monitoring the progress of well tools moving therethrough.

Abstract: A cementing float valve for subterranean wells is provided wherein a wiping plug retaining sleeve is concentrically positioned on the top of a float valve and secured to an outer housing by cementitous or other drillable material. the retaining sleeve provides a downwardly facing latching surface and a seal bore disposed above the latching surface for cooperation respectively with an expandable ring and an annular seal conventionally provided on a wiping plug.

Abstract: Drilling muds and waste fluids pumped to reserve pits and other on-site locations during drilling operations are recycled to the drilled well after the drilling operation is terminated and after the rig is removed from the site of the driling operations. The well is then plugged and abandoned without a rig on location.

Abstract: A pumpdown well completion system for pumpdown well servicing of remotely located wells such as subsea wells including particularly a parking tool and a parking tool landing nipple for a pumpdown flowline to permit pumping a tool train to the landing nipple using a large size piston unit and thereafter pumping a section of the tool train beyond the landing nipple using small size piston units. The parking tool includes a central mandrel having a coupling collet telescopically engaged in a housing having a parking collet. The mandrel is telescopically engaged in the housing for movement between a first traveling position at which the coupling collet connects a large size section of a tool train with a small size section and a second release position at which the small size tool train section is released from the parking tool.

Abstract: A pumpdown well completion system for pumpdown well servicing of remotely located wells such as subsea wells including particularly a parking tool and a parking tool landing nipple for a pumpdown flowline to permit pumping a tool train to the landing nipple using a large size piston unit and thereafter pumping a section of the tool train beyond the landing nipple using small size piston units. The parking tool includes a central mandrel having a coupling collet telescopically engaged in a housing having a parking collet. The mandrel is telescopically engaged in the housing for movement between a first traveling position at which the coupling collet connects a large size section of a tool train with a small size section and a second release position at which the small size tool train section is released from the parking tool.