Abstract: A rotatable liner hanger for an oil well with a supporting mandrel having an annular recess with upper and lower shoulders and a tubular housing and a bearing means disposed in the recess. The housing has elongated windows with side surfaces having tongue and grooves at an inclination angle of 15.degree. and elongated slip members with interfitting tongue and grooves along their side surfaces where the slip members are initially retracted within the windows of the housing and are extendible outwardly into load bearing support with a casing. A selectively actuated device controls the positioning of the slip members and an annular recess in the housing provides a bypass area when the slip members are extended.

Abstract: Apparatus for positioning a detector at a plurality of depth locations within a borehole includes an elongated body member having a pair of diametrically opposed hydraulic pad displcement members mounted thereon. A pad mounting member is pivotally attached to each pad displacement member and a pair of borehole wall contacting members are pivotally attached to each pad mounting member. A signal detector is mounted behind one or more of the pad members. At each test depth a hydraulic power system deploys the pad displacement members from the body to an extended position and extends the wall engaging pad members into contact with the borehole wall. A redundant hydraulic safety system is provided in case of electrical system failure for releasing the pad member.

Abstract: The invention relates to a safety valve for oil wells, able to permit artificial output operation by injection of a fluid under pressure. This valve comprises a movable closing flap (11), a tubular internal slide (9), a spring (10) for returning said slide to its upper position, a hydraulic system for displacing said slide downwardly due to pressure of a control fluid, an internal tube (300) for passage of injected fluid, fixed to the slide (9), a lower connecting sleeve of a series of lower tubes (Ti) for the passage of injected fluid, able to be connected with the internal tube (300) when the tube is in the lower position, an upper connecting sleeve (309) of a series of upper tubes for the passage of injected fluid, in which may slide in a sealed manner the internal tube, a system for anchoring the valve in a receiving sleeve (1) comprising a hydraulically actuated mechanical system controlled by the control fluid, and seals (15, 16) at the contact of the receiving sleeve (1).

Abstract: An improved subsea hanger and seal having a hanger body with an external landing shoulder and an upstanding sealing rim with external sealing teeth and multiple internal camming surfaces and an actuating ring which fits within the sealing rim and includes external multiple camming surfaces mating with the camming surfaces on the interior of the sealing rim to move said sealing rim into initial set position and allow subsequent pressure to be applied to the interior of the actuating ring to deform the sealing rim into positive gripping and sealing engagement with the interior of the subsea wellhead housing in which the hanger is landed.

Abstract: In a hydraulically operated setting tool for liner hangers used in a well bore, a norally countracted ball seat formed in the setting tool mandrel by contracted and elongated finger members. Upon seating a ball member in the ball seat, applied pressure is used to set the hydraulic setting tool. After setting the hydraulic setting tool, the ball seat is longitudinally movable so that the finger members can expand to a full opening condition in a recess and release the ball member and so that the finger members are also retrievable with the setting tool.

Abstract: A well tool having a locking arm that is rapidly deployed by a long strike of a hydraulic piston having a small area and is locked in the deployed position by a short stroke of a hydraulic piston having a larger area.

Abstract: Apparatus for positioning a detector at a plurality of depth locations within a large diameter borehole includes an elongated body member having a pair of diametrically opposed hydraulic pad displacement members mounted thereon. A pad mounting member is pivotally attached to each pad displacement member and a pair of borehole wall contacting members are pivotally attached to each pad mounting member. A signal detector is mounted behind one or more of the pad members. At each test depth a hydraulic power system deploys the pad displacement members from the body member to an extended position and extends the wall engaging pad members into contact with the borehole wall.

Abstract: An actuating system for operating pressure-medium actuated coupling members for remotely connecting a drill column to a pipe or pipe casing, where the location of the connection is inaccessible, comprises a directional control valve (48) switchable by an actuator (46) and having at least three connections (51, 52, 53), a coupling (47) operated in one direction by the actuator disposed between the actuator (46) and the adjustable part of the directional valve (48). The coupling members may be a plurality of radially movable bearing members (34) and bars (24) spaced apart in the axial direction of the device.

Abstract: An improved wellhead structure including a wellhead housing having a sealing surface with grooves therein and pressure compensating material in the grooves, a sealing sleeve having inner and outer resilient seal rings and an internal actuating groove with upper and lower shoulders, an actuating ring having an outer flange engaged within the internal groove in the sleeve and an external surface tapering downward and inwardly and a hanger with an upstanding rim having external grooves with pressure compensating material in the grooves and having an inner surface which tapers upwardly and outwardly and is engaged by the external tapered surface of the actuating ring and upper and lower external seals and a port extending from the interior of the actuating ring to its exterior into the area between such seals so that pressure applied through the port forges the hanger rim and the sealing sleeve outward to ensure positive metal-to-metal sealing across the annulus between the exterior of the hanger rim and the inte

Abstract: An improved tubing packer including a sleeve connected in the tubing string and having an outer diameter close to the inner diameter of the string into which it is to seal and a plurality of external grooves having pressure compensating material therein, a liner within the sleeve and spaced therefrom, pressure responsive piston between said sleeve and said liner, the pressure responsive piston and said sleeve having coacting multiple camming surfaces which coact to force the sleeve outward into tight gripping and sealing engagement with the interior of the well string and a source of pressure fluid supplied to the pressure responsive piston.

Abstract: Seismic probe more particularly usable in an untubed shaft comprising a central body and arms opening out radially in different directions. The end of each of the arms is provided with means for anchoring the arm on the wall of the shaft and geophones in a box. In one embodiment, each of the arms can be moved outwardly from the central body independently of the other arms.

Abstract: A seismic receiver is provided for measuring seismic signals transmitted through the earth and received in a well borehole. A reversible electrical motor drives a harmonic drive reducer which amplifies the torque provided to drive a ball screw. The ball screw moves linearly along the axis of the well borehole to control the extension of a clamp arm into and out of an extended position in contact with subsurface earth adjacent the well borehole. A releasable electric clutch is provided so the receiver is retrievable in the event of a power failure while the clamp arm is extended.

Abstract: A slip gripping mechanism is shown for supporting a string of cylindrical conduit within the interior bore of a circumscribing conduit. An elongate body has a plurality of spaced longitudinal slots at one end. Vertically shiftable slips are carried in the slots by side edges which engage mating profiles formed in the slots. The slots form guideways for the slips for shifting the slips upwardly and outwardly relative to the body between a set position engaging the circumscribing conduit and an unset position. Each slip has an arcuate lower surface and a selected width to thickness ratio to allow controlled flexing of the slip in the direction of the circumscribing conduit as the slip moves to the set position.

Abstract: A running string is releasably connected to a liner an liner hanger setting arrangement for lowering into a well bore casing and securing the liner to a casing. The liner hanger setting arrangement includes a first sleeve with upper and lower annular rows of conically shaped segments circumferentially spaced thereon. Upper and lower spaced rows of hanger slips are connected to a second sleeve by elongated strips and the second sleeve is releasably secured to the first sleeve whereby the second sleeve may be released from the sleeve for relative longitudinal movement therebetween to move the hanger slips onto the segments and secure the liner to the casing. The space between the segments in each row is substantial to accommodate relatively unrestricted fluid flow thereabout as the apparatus is manipulated and operations conducted in the well bore.

Abstract: A system for securing a measurement-while-drilling (MWD) instrument in a generally centralized position within a protective drill collar. The system includes a pressure responsive slidable contact pad member in combination with a plurality of fixed contact pad members. As the instrument is subjected to an increase in pressure, above atmospheric, a slidable contact pad member moves longitudinally along an inclined angle face of a base member into contact with the inner wall of the drill collar to thereby centralize and secure the instrument within the drill collar.

Abstract: A lock, particularly suitable for locking a top packer against upward movement relative to a lower packer in a well bore, includes a radially movable latch member slidably mounted in a radial cavity defined in an inner mandrel which is movable relative to an outer member to which the top packer is connected in the exemplary use. Spring biasing elements are used to retain the latch member in a disengaged position until, from within the mandrel, an actuating pressure is exerted radially outwardly on the latch member with a force greater than the biasing force of the spring biasing elements and a radially inwardly acting force exerted by a hydrostatic pressure existing externally of the outer member but communicated internally thereof. When this occurs, gripping teeth on the latch member interlock with an engagement surface on the interior of the outer member.

Abstract: An apparatus for chemical treatment of a fluid pumped from a well through a production tubing includes a tubing anchor with slips adapted to be set hydraulically and mechanically against the casing in the well without rotating the production tubing. A branch line from a chemical injection line communicates with a setting pressure chamber in the anchor which, when pressurized, is used to initially set the slips. Thereafter, a straight pull on the tubing mechanically completes setting of the slips and a plug blocking the injection line is removed enabling the delivery of a treatment chemical to the well fluid upstream of a pump utilized in removing the fluid in the well.

Abstract: A running tool for a hydraulically set packer, hanger, or the like, having expandable slip elements held in a retracted position by an actuating sleeve during run-in, employs an annular piston to hold the actuating sleeve in a fixed locked position relative to the tubular body portion of the running tool, thus preventing inadvertent setting of the tool due to impacts received during the run-in of the tool. When the slips are positioned at their desired location in the well, an increase in fluid pressure applied to the tubular body portion of the running tool will effect an upward movement of the annular piston, shearing a shear screw which has held the piston during the run-in operation, releasing a positive lock engaged with the slip actuating sleeve, and effecting upward movement of the actuating sleeve to release the slips.

Abstract: A chemical cutting apparatus for use within a well bore is disclosed. The apparatus of the present invention includes a tubular casing adapted to be lowered into a well bore. The tubular casing contains an internal chamber containing a chemical cutting fluid. A remotely operated explosive charge pressurizes the chamber of chemical cutting fluid and simultaneously forces chemical cutting fluid out through a discharge passage and erects a plurality of slips which anchor the tubular casing within the well bore. After a cutting operation has taken place, pressure buildup within the tubular casing which occurs as a result of a clogged discharge passage may be vented or bled off by the selective opening of a second discharge passage, thus preventing undesired engagement of the anchor slips during removal of the apparatus. In a preferred embodiment of the present invention, an interlock is provided which prevents the opening of the second discharge passage prior to ignition of the explosive charge.

Abstract: A downhold chemical cutting process for cutting a target object within a well. A source of a gaseous chemical cutting agent comprising a nitrogen fluoride is introduced into the well adjacent the target object and employed in a cutting operation in which the nitrogen fluoride cutting agent is directed against the target to the cut. A gaseous cutting agent source such as a mixture of florine and nitrogen trifluoride may be employed. Alternatively a perfluoroammonium salt which decomposes upon heating to produce a mixture of florine and nitrogen fluoride may be employed. A cutting tool comprising pressure actuated anchoring means, pressure generating and chemical sections, and a cutting section having a downwardly extending nozzle. The nozzle is provided with a standoff sleeve to provide a desired distance between the target object to be cut within a well bore and the nozzle outlet.

Abstract: According to the invention, a downhole anchor assembly is employed for absorbing reaction torque from a downhole mud motor in a directional drill string so as to minimize azimuthal deviation from such reaction torque. The anchor assembly has as its main structural basis an elongated, generally cylindrical housing with upper and lower ends formed as tool joints for coupling the body into a directional drill string. Three elongated chain support bodies are longitudinally mounted in the housing, evenly circumferentially spaced about the periphery, and each support body supports an endless anchor block chain so that elongated portions of the chains are longitudinally arranged and generally radially exposed externally of the bodies. The chain support bodies are radially shiftable under the influence of hydraulic drilling fluid pressure from retracted positions in the body to extended positions in which the exposed chain portions grip the well casing against twisting of the drill string.

Abstract: A setting tool and a liner hanger for setting a liner hanger in well bores traversing earth formations where the setting tool can be hydraulically operated and released from the liner hanger or alternatively, can be mechanically operated and released from a liner hanger. The tool is provided with bypass areas in the liner hanger and locates the tieback sleeve below the liner hanger. The setting tool incorporates most of the expensive setting mechanism in the setting tool and is not a part of the liner hanger. Thus, the setting mechanism is therefore removable from the wellbore and can be reused on other liner hangers.

Abstract: A clamping apparatus for locking tools in a well is disclosed. A first piston sealably engages a hollow body member to form a chamber, which is filled with a working fluid. A bias member or spring moves the first piston, extending a clamping arm connected to the first piston against the well wall. A second piston is sealably engaged in a bore in the first piston; the bore is in fluid communication with the chamber. The second piston is driven into the bore by a motor, increasing the pressure in the chamber through a passage in the first piston between the bore and the chamber. This increased pressure further urges the first piston and locks the clamping arm against the well wall. The hydraulic pressure is released, and the clamping arm is unlocked, by opening a valve in a line between the chamber and a reservoir. The clamping arm is retracted by driving the second piston into the bore into contact with the first piston, forcing the first piston back against the spring.

Abstract: For use in servicing a completed well exposed to the possibility of upward flow, an improved tool is set forth in the preferred and illustrated embodiment. This tool is adapted to be run on a wireline to support wireline service equipment therebelow; it incorporates a set of weights which are affixed to a sleeve, the sleeve connecting with a set of serrated collet slips on a tapered cone. The tapered cone is connected with a central rod or stem which extends therebelow, telescoping in the sleeve, the two being forced to telescope by a coil spring. At the top end, the cone is connected with a fishing neck and rope socket to enable the device to be run on a wireline. If flow from the bottom of the well occurs, the tool is forced to an expanded position and thereby sets, substantially blocking the passage to limit fluid flow pass the tool.

Abstract: A landing nipple and safety system for installation in wells having a submersible pump for pumping well fluids to the surface plus a subsurface safety valve for maintaining the well under control during installation and removal of the pump from the well. The subsurface safety valve is hydraulically actuated by the discharge pressure of the pump. The landing nipple on which the pump is mounted and in which the safety valve is installed can be retrieved from the flow conductor by conventional wireline techniques.

Abstract: A liner hanger is shown of the type used to hang a well liner in a surrounding well bore. The hanger includes a tubular mandrel which is connectible in a liner string. A set of circumferentially-spaced gripping slips are mounted about the mandrel with each slip having a spring arm extending therefrom in alignment with the axis of the mandrel. A tapered, slip expander cone is mounted on the mandrel exterior above each of the slips for expanding the slips radially outwardly in the direction of the surrounding well bore responsive to opposite relative movement of the slips and cones. At least one channel guide is formed on the exterior of the mandrel in longitudinal alignment with one of the expander cones. The channel guide includes a slot portion for slidably receiving the spring arm of one of the gripping slips for supporting the slip on the exterior of the mandrel.

Abstract: A hydraulic running and setting tool for a well packer including an annular cylinder body having a top sub for connection with a tubing handling string, a longitudinal operator tube releasably secured at a first upper end in the top sub, a first locking collet assembly for releasably coupling with a packer body including a collet connected with the top sub and a collet locking surface along the second end of the operator tube, an annular piston in the cylinder body, and a second locking collet assembly releasably connected with the piston for operating a packer setting sleeve. Shear pins in the running tool isolated from weight forces applied to the running tool by the packer control the setting sequence while the packer remains fully coupled by the first collet assembly.

Abstract: Apparatus and method of positioning and seating a retrievable landing assembly within a packer bore receptacle in a well bore. Latching measure provided for releasably securing a landing assembly in the packer bore receptacle. The latching means which are normally in a retracted position are actuated by hydraulic pressure means to lock the landing assembly within the packer bore receptacle. The retrievable landing assembly can be retrieved with a spear mechanism by shearing a release mechanism. The retrievable landing assembly is hydraulically set and mechanically retrieved.

Abstract: A downhole chemical cutting tool having an improved cutting section. The tool comprises an elongated tool body adapted for insertion into a well bore and includes anchoring means actuatable between a deployed position in response to the application of fluid pressure and a retracted position in response to the release of such pressure. The tool further includes a chemical section and a cutting section located in front of the chemical section. The cutting section has a longitudinally extending bore which is in fluid communication with the chemical section at the rear of the cutting section and in fluid communication with the exterior of the tool body at the front of the cutting section. The cutting section is provided with one or more cutting ports through which the cutting fluid passes when the tool is fired. A piston is slidably disposed in the bore of the cutting section at a location between the ports and the chemical section.

Abstract: This invention concerns the connection and disconnection of well-pipes in an articulated structure level with the articulation.The device comprises a length of flexible pipe, at one end of which is an adapter containing a sealing device, a positioning device and a locking device, and at the other end of which is another adapter containing a sealing device and a locking device, these sealing, positioning and locking devices being designed to fit into upper and lower receptacles, the upper receptacle consisting of the lower end of the tubing pipe, and the lower receptacle consisting of the upper end of the seabed pipe, the whole connection-disconnection device being able to pass through the upper receptacle.This connection-disconnection device is specially designed for use in articulated hydrocarbon-production installations.

Abstract: A system for releasably anchoring well tools within a tubing string at a preselected downhole location. The system includes a running tool, locking mandrel, and landing nipple. Control fluid pressure is used to ensure positive engagement of the locking mandrel within the landing nipple prior to releasing the running tool from the locking mandrel. The locking mandrel and running tool are particularly useful for installation of surface controlled subsurface safety valves. However, the system can be used to install a wide variety of flow control devices and/or well tools.

Abstract: A well tool for running, cementing and washing a well housing or casing hanger including a tubular body, a cementing stinger on the lower end of the body, a well housing releasably supported on the body, a hollow skirt having inwardly facing ports and positioned in surrounding relationship to the upper end of the housing, a washing fluid supply to the skirt, a pressure responsive valve in the washing fluid supply, the support for the well housing including a pressure responsive release and the pressure responsive valve and the release are connected so that the supply of washing fluid under pressure to the connection opens the valve and actuates the release for the washing step and the step of retrieving the well tool.

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 down-hole drilling apparatus having a drill tool assembly with a cutting head at one end connected to an umbilical which extends to a retrieval reel on the surface. The umbilical provides electrical power, drilling fluid and means for instrumentation and control signals to be transmitted between the drill tool assembly and a processing device on the surface. The drill tool assembly can propel itself into or out of a bore hole by the cyclical actuation of anchor and ram units or change the direction of drilling by actuation of thruster assemblies in response to control signals sent manually by an operator or automatically by the processing device.

Abstract: A retrievable well packer is shown of the type adapted for releasable setting within a well conduit. The packer has a central mandrel extending within an outer assembly, seal members carried on the outer assembly for sealingly engaging the conduit, anchoring slips carried on the outer assembly for grippingly engaging the conduit, and a hold down piston-collet assembly for releasably connecting the mandrel to the outer assembly to maintain sealing and gripping engagement between the seal members an anchoring slips and the conduit. The collet is movable between a locking position in contact with the piston whereby the mandrel is connected to the outer assembly, and a release configuration out of contact with the piston whereby the mandrel is released for longitudinal movement relative to the outer assembly. A shear wire fixes the piston in the locking configuration in contact with the collet.

Abstract: A slip mechanism is provided to effect the anchoring of an inner tubular conduit to the inner wall of a larger surrounding tubular conduit such as the casing of the well. Two annular cam elements are disposed in axial alignment for slidable movements on the inner tube. Such cam elements have a plurality of peripherally spaced, axially extending, slots formed in their peripheries. A set of first slip members are radially slidably disposed in a portion of the axial slots and a set of second slip members are radially slidably disposed in the remainder of the axial slots. The slips are provided with an inclined cam surface which cooperates with a correspondingly shaped surface provided in the slot receiving that portion in the cam element. The slips have external teeth and may be of identical configuration, but are reversed when inserted into oppositely extending slots provided in separate cam elements.

Abstract: A self powered downhole tool anchor device (10) preattached to a downhole tool (T) and unitarily supported by a drill string (DS) for a single trip into a well bore, actuated by forceful engagement with the bottom or plug (P) in the well bore and attachment to a well bore casing (C). The anchor device comprises an inner mandrel (20) and lower cone (34) containing a piston (30) and fluid (F) for axially displacing an outer mandrel and piston (44) connected thereto by shear screws (46). An upper cone (20) on the outer mandrel is connected by shear pins to a slip housing (50) containing radially expandable slips (38) keyed to the lower cone (34).

Abstract: A retractable anchoring device for a sonde to be lowered into a well for logging purpose, is adapted to rigidly position the sonde at a preselected depth. The device comprises pivotable anchoring arms adapted to apply against the wall of the well a substantially constant force produced by associated jacks actuated by driving means so as to apply to the respective arms forces which are limited by specific valves therefor in the hydraulic circuit feeding of the jacks.

Abstract: Discloses a method and apparatus to help provide fluid pressure in a well bore sufficient to overcome in situ earth formation pressures by perforating a circulation port through the sidewall of a drill collar above the drill bit to provide circulation of weighted drilling fluid down through the drill spring and back up the well annulus. Includes the lowering of a chemical reactant wireline perforating tool to a designated position within a drill collar, placing a single chemical flow jet into position addressing the sidewall of the drill collar, forcing the chemical reactant through the jet under high pressure and at high temperature to react with the drill collar metal and thereby remove a portion of the metal with the remaining metal defining a fluid circulation port through the drill collar wall, and pumping fluid through the port to establish circulation.

Abstract: An inflatable packer element utilizing metal cable employed to reinforce the elastomeric packer bladder as an anchoring element. Steel cable is exposed along at least a portion of the packer element surface to engage a casing, liner or other conduit wall, or the wall of an open well bore. A seal may be effected at one or both ends of the packer element through use of a bonded elastomer cover which is pressed against the conduit wall by the expanded cable when the packer element is inflated.

Abstract: A packer for a subterranean well has slip elements and elastomeric seal elements which are respectively radially expandable into engagement with a well conduit wherein the packer is mounted in surrounding relationship to an inner sleeve which is rigidly interconnectable to a second conduit. An intermediate sleeve is mounted in axially slidable, concentric relationship to the inner sleeve and cooperates with an outer sleeve to define an annular fluid pressure chamber. A upper piston and a lower piston are mounted in the annular pressure chamber and are driven in opposite directions by application of fluid pressure to such chamber. Compressive forces are thus transmitted to the elastomeric sealing elements and a slip mechanism. The packer also incorporates a hydraulic reservoir which is normally filled with casing fluid and has a constricted orifice connected to the casing annulus.

Abstract: Downhole well tools and anchoring means therefore including a chemical cutting tool having improved slip actuating and slip array assemblies. The cutting tool includes a slip shaft provided with fluid passageway and having a slip array slidably disposed thereon. The tool further includes slip expansion means secured to the shaft adjacent to the slip array. A piston sleeve is slidably disposed on the shaft and connected to the slip array and defines a piston chamber in fluid communication with the shaft passageway such that the application of fluid pressure drives the piston sleeve and slip array to a deployed position in which the slip array is expanded. Biasing means located externally of the piston sleeve function to bias the piston sleeve to a retracted position upon release of fluid pressure. The slip array is comprised of spaced slip segments which are biased inwardly by means of cantilever springs secured to a structural member of the logging tool.

Abstract: A well packer which is anchored downhole within the bore of a casing string by opposing slips. The well packer is hydraulically set. One embodiment of the invention allows the packer to be released from its downhole location by cutting the packer mandrels below the packing elements. The invention is particularly adapted for use with a dual string well packer. However, the anchoring and releasing mechanism of the present invention can be readily adapted for use with a single string well packer. Use of the present invention with a dual string packer is particularly desirable because it allows combining the features of hydraulic setting downhole, opposing slips for better resistance to differential pressure in either direction, and selective releasing of the packer from the downhole location.

Abstract: Apparatus and method of positioning and seating a retrievable insert landing assembly within a packer bore receptacle in a well bore. Means are provided for releasably securing a landing assembly in the packer bore receptacle by engaging an annular groove in the PBR with latching elements on the landing assembly. The latching elements are normally in a retracted position and are actuated by hydraulic pressure. The landing assembly has an internal polished bore which slidably and sealingly receives a tubular extension attached to a releasable coupling. The releasable coupling is disconnectable from the landing assembly after it is latched in place. To retrieve the landing assembly a spear mechanism is run in the tubing and an upward pull shears a release mechanism in the landing assembly. The retrievable landing assembly is hydraulically set and mechanically retrieved.

Abstract: The disclosure relates to an improved apparatus for effecting the cementing of a liner at the bottom of a well bore. The liner sleeve assembly is inserted into the well bore on a hanger which is detachably connected to a running tool, which, in turn is connected to the work string by a torque transmitting expansion joint. The running tool may be fluid pressure actuated to set the hanger. In the event of failure of the fluid pressure setting operation, the hanger may be mechanically set by rotation of the work string transmitted to the running tool by the torque transmitting expansion joint.

Abstract: A liner and a hydraulic liner hanger setting arrangement for setting the liner in a well bore casing includes a setting tool having a tubular mandrel connected in a pipe string to extend through the hydraulic setting arrangement with the liner forming an outer housing surrounding the liner and to form a longitudinally extending annular recess therebetween with one end of the recess exposed to the well bore. Longitudinally extending piston means are sealably engaged in the recess with the piston means having a cone shaped end. Slips are releasably secured to the liner and means are provided to retain and to lock the piston means against premature retraction into the recess. A port in the housing communicates fluid pressure from the mandrel to the housing recess to move said piston means in the recess and engage the cone shaped end thereof with said slips to urge them into engagement with the well bore casing and thus secure the liner in position.

Abstract: A well production apparatus for fluid production through a pair of downhole safety valves to both well tubing and the tubing annulus includes a packer with a dual bore head connected to the lower end of the tubing. Primary and secondary packer mandrels depending from connections with said head serve as conduits for directing production fluid to the safety valves with the secondary mandrel also serving as a conduit through which a power conductor extends for connecting with a motor beneath the packer. A set of hydraulically movable slips slidable between retracted and deployed positions are carried on the mandrels on opposite sides of a packing element and a setting cylinder secured to one of said packer mandrels defines a pressure chamber containing a setting piston which is movable from a retracted position to an extended position to compress said packing element and deploy said slips for anchoring said packer in the casing.

Abstract: A tubing hanger landing and orienting tool for a subsea wellhead having a mandrel connected to the tubing hanger, a sleeve surrounding a portion of the mandrel and being axially movable thereon, a liquid filled chamber between the sleeve and the mandrel, a shoulder on the sleeve adapted to seat in the wellhead, relative movement of the sleeve and the mandrel after seating of the sleeve in the wellhead causing a change of volume in the chamber, means controlling the volume in the chamber to cushion the landing of the tubing hanger, pressure responsive extendible lug in the mandrel which when extended coacts with a cam and slot surface within an orienting spool to orient the tubing hanger in the wellhead, and means for applying pressure from said chamber to extend said lug after seating of the sleeve in the wellhead.

Abstract: A subsurface wellbore completion assembly for a cased well is disclosed. The assembly includes thermal cup packers which may be set at a subsurface location along the well above a hot fluid injection zone. The assembly is run into the well on a tubing string and, at the desired depth, the assembly is converted to operating condition where the packers and slips are set. The apparatus may be reassembled to running condition for withdrawal from the well or the packers may be drilled-over to permit washover in the well.

Abstract: A liner hanger and setting tool for use in oil well completions employing a liner hanger having a one piece body member and spring biased slips and a setting tool having a hydraulically actuated slip release mechanism normally retaining the slips in a retracted position and operable upon application of fluid pressure for releasing such slips. The setting tool has a retrievable pack-off bushing disposed in the bore of the liner hanger and a threaded nut type of release for disconnecting the setting tool from the liner hanger. The setting tool requires pressure for setting and rotation for release.