Abstract: Two embodiments of an improved tool, which may be used as a running tool or a pulling tool for well tools. The improved structures provide running pulling tools which may be jarred upwardly on or jarred downwardly on as long as required after engaging a tool set in well pipe and may be released from the well tool when desired. When the running pulling tools are jarred downwardly, they will operate to release if either the tool mandrels or tool skirts contact with well tool. Each tool skirt is positioned in contact with external dog shoulders, providing increased impact area and eliminating costly precision machining of tool parts. Both improved tools may be manually released from a well tool on surface. One embodiment may be prepared for further use with the aid of hand tools. The other embodiment may be prepared for further use almost by hand.

Abstract: A retrievable gravel packer and retrieving tool therefor. The gravel packer includes an inner mandrel assembly attached to an operating tool by a left-hand threaded connection. The packer is set without rotation by the operating tool to move a pusher sleeve downwardly with respect to the mandrel, compressing a packer element and setting slips into engagement with a well bore. A ratchet prevents the pusher sleeve assembly from moving upwardly with respect to the mandrel. The packer may be retrieved by the retrieving tool which has a lower collet engagable with a releasing mandrel in the packer. After releasing collets held by the releasing mandrel, the inner mandrel of the packer is released so that the packer element and slips engaged by the mandrel are disengaged from the well bore. An upper collet in the retrieving tool engages the left-hand thread in the packer mandrel so that the packer and retrieving tool may be raised out of the well bore.

Abstract: An improved wellhead sealing assembly having an annular body with an outer diameter sufficient to pass through the interior of the wellhead housing and an inner diameter smaller than the exterior of the wellhead hanger so that it lands on the upper end of the hanger, a metal sealing ring secure to said body and adapted to be positioned between the housing and the hanger, said sealing ring having an inner sealing lip for engaging the exterior of the hanger and an upstanding sealing rim, a plurality of locking segments with arms extending radially through said body and projecting beyond the interior of said body, a plurality of load segment carried by said body and engaging the interior of said sealing rim, load pins extending through said body and engaging the interior of each of said load segments and extending inward through and beyond the interior of said body, and a loading wedge ring supported within said body and movable axially therein to engage said load pins and said locking segment arms to move said

Abstract: The hydraulic setting tool of the present invention comprises an adapter, housing, piston, piston sleeve and shear sleeve rod.

Abstract: An improved running pulling tool utilizing dogs for engaging an internal fishing neck on a well tool. The dogs are locked in fishing neck engaging position on the tool mandrel and are unlocked by jarring downwardly, upwardly and again downwardly and moved to a position on the mandrel retracting the dogs and releasing the improved tool from the fishing neck. The improved structure provides a tool which may be jarred upwardly on or jarred downwardly on as long as required and which may be released from the well tool fishing neck when desired. When the tool is jarred downwardly on, it will operate to release if either the tool skirt or mandrel contact the well tool. The skirt may be positioned to contact shoulders on the dogs and eliminate costly precision machining and provide more area to absorb jarring impact on the tool. On surface the improved tool can be manually released from a fishing neck and manually prepared for further use.

Abstract: A well tool lock mandrel and running and pulling tools for installing and retrieving the lock mandrel. The lock mandrel is used for supporting a well tool such as a subsurface safety valve at a landing nipple in a well tubing string. The lock mandrel includes a tubular body, locking dogs supported in the body, an expander sleeve for operating the locking dogs, and a latch for releasably locking the expander sleeve when the locking dogs are locked outwardly. The running tool includes a head assembly for connection with a wireline tool string, an upper retainer key assembly for connection with the head of the lock mandrel, and a lower locking lug assembly for engagement with the expander sleeve of the lock mandrel for operating the sleeve. The running tool also includes a spring biased insertion sleeve for operating the lower locking lug assembly permitting the running tool to be installed in the lock mandrel when the locking dogs of the lock mandrel are at inward positions.

Abstract: A running tool (RT) comprising a stem (10) with a torque ring (44), a running nut (36), an engagement sleeve (40), and a lock ring (42) to releasably connect and support a casing hanger (C), a two piece (16,20) wear bushing (WB) and packoff assembly (P) thereon. The lock ring (42) is wedged into engagement with one piece (16) of the wear bushing (WB) by downward axial movement of the running nut (36). The casing hanger (C) is threaded on the packoff assembly (P) and supported thereby and arranged so that rotation of the torque ring (44) and stem (10) rotates another piece (20) of the wear bushing (24) and the packoff assembly (P) to set the packoff.The casing hanger (C) and one piece of the wear bushing (WB) are lowered on the running tool (RT) into final position within the wellhead (W). The running tool (RT) is released by rotation of the stem (10) which raises the running nut (36), disengages the engagement sleeve (40), allowing the lock ring (44) to disengage the wear bushing (WB).

Abstract: A device and method are shown for testing a packer in a well bore where the packer has an internal bore for conducting fluids and external gripping and sealing means for gripping and sealing the surrounding well bore. The packer is first set at a desired depth within the well bore. The test tool is then made up on a tubing string and has an external collet for engaging a recess provided within the interior bore of the packer. An external shear sleeve on the test tool is initially positioned to underlie the collet fingers when the collet fingers are received within the packer recess to retain the packer on the test tool. A fluid port communicates the test tool internal bore with a pressure responsive area of the shear sleeve for shearing the sleeve and releasing the collet fingers. The packer is then tested by applying pressurized fluid to the well annulus above the set packer. By shearing off the shear sleeve, the test tool can be retrieved to the well surface, leaving the set packer in the well bore.

Abstract: A locking production seal assembly is shown for sealing a well tubing string within the bore of a surrounding well conduit which has been provided with an internal recess. The seal assembly includes a sliding mandrel which is made up in the well tubing string and an outer sleeve which is carried about the mandrel. The outer sleeve has an external seal for sealing with the interior of the surrounding conduit and an internal seal for sealing with the sliding mandrel. A setting sleeve carried between the mandrel and outer sleeve carries a set of setting dogs for engaging the surrounding conduit and a set of locking dogs for locking the setting sleeve to the surrounding sleeve once the assembly is set. The load carrying setting dogs are separated from the mandrel exterior by the setting sleeve to prevent damage to the mandrel exterior.

Abstract: A bridge plug apparatus includes a mandrel assembly having an operating fluid passageway disposed therein. A releasable coupling assembly has an upper end adapted to be connected to a tubing string and has a lower portion adapted to be releasably connected to the mandrel assembly. An annular packer is disposed about the mandrel assembly. A mechanical first slip assembly is connected to the mandrel assembly below the packer. A hydraulic second slip assembly is connected to the mandrel assembly above the packer. A power piston is disposed about the mandrel assembly for longitudinally compressing and radially expanding the packer to seal the packer in response to an increase in fluid pressure within the operating fluid passageway of the mandrel assembly. A hydraulically actuatable releasing device is provided for releasing a latched connection between the coupling assembly and the mandrel assembly. This releasing device is defined upon a power sleeve slidably disposed about the mandrel assembly.

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: The subsea wellhead system includes a wellhead, a housing seat disposed in and connected to the wellhead, a casing hanger supported by the seat, a holddown and sealing assembly in the annulus between wellhead and hanger, a running tool attached to the hanger for lowering it into the well and initially actuating the holddown and sealing assembly, and apparatus for applying hydraulic pressure to further actuate the seal. The housing seat and wellhead are connected by breech block teeth. The seat maintains 360.degree. bearing surface with the hanger. The holddown and seal assembly includes an upper rotating member threadingly engaging the hanger and suspending a lower stationary member. The latter includes a Z-shaped portion having a plurality of frustoconical metal rings positively connected by links. The rings form grooves housing resilient elastomeric members.

Abstract: There are disclosed two embodiments of a packer for closing off the annular space between a pipe string and a well bore in which the pipe string is disposed, each of which includes an annular packing element adapted to be expanded into sealing engagement with the well bore in response to relative axial movement between inner and outer tubular members, and releasably latched in expanded position by means which includes a circumferentially expandible and retractable body lock ring. In each case, the body lock ring has cam teeth about its outer side which are engaged with cam teeth on the inner circumference of the outer tubular member for circumferential expansion and contraction with respect thereto, and a relatively long length of ratchet teeth on its inner side for ratcheting with respect to a relatively short length of ratchet teeth on the outer circumference of a latching member carried by the inner tubular member in response to movement of the tubular members to retracted positions.

Abstract: A method and apparatus for effecting the sealing of a well conduit comprises the positioning of a sealing plug unit within a special nipple provided in the well conduit and defining first and second surfaces and a seal bore. The sealing plug unit is provided with external seal elements cooperable with the seal bore and a first and second latching elements respectively cooperable with the first and second surfaces provided on the nipple. The sealing plug is actuated by first passing it downwardly through the nipple and then retracting it upwardly, whereupon the first of the latching elements engages with one of the surfaces on the nipple, thus preventing further upward movement on the assembly and permitting the application of a tensile force to release the plugging unit from the remainder of the unit to bring a camming sleeve into engagement with the second latching element to cam such element outwardly into engagement with an upper recess of the nipple.

Abstract: A mechanical setting tool 10 has an inner mandrel 12, an upper sleeve member 20, and a lower sleeve member 22. The inner mandrel 12 is connected through a shear stud 14 to a conventional wireline packer 16. The upper sleeve 20 has setting slips 52 therein which are set by abutting the cone 66 mounted on top of the lower sleeve 22. The lower sleeve has a bottom shoulder 78 which engages an outer sleeve of the packer 18. Upward movement of the mandrel 12 sets the slips 52 and thereafter sets the slips on the packer. The mandrel 12 then shears shear stud 14 and separates from the packer and then disengages its slips 52 so that it can be retrieved from the casing 11.

Abstract: Well tools for running and setting a well safety valve including a lock mandrel for releasably locking the valve at a no-go landing nipple in a well bore and a running tool for running and setting the lock mandrel. The lock mandrel includes a body provided with a no-go ring, locking dogs on the body, and an expander sleeve movable upwardly in the body for expanding and locking the dogs. The running tool includes a tubular core having an end engageable with an operating tube of the safety valve, an upper latch assembly for engaging the lock mandrel housing to couple the running tool with the lock mandrel, a lower latch assembly for operating the expander sleeve of the lock mandrel to expand the mandrel locking dogs, and a head for connecting the running tool in a wireline tool string. The running tool has locking features which apply a force from a spring of the safety valve to the upper latch assembly to lock the running tool with the lock mandrel.

Abstract: A soft set and pull latch for setting and pulling a measuring instrument in a well conduit. The latch includes a body with a seal, a fishing shoulder and a no-go shoulder. A measuring instrument support is attached to the body by a shock absorber. Locking dogs are radially and longitudinally movable in the body. A dog expander sleeve includes a recess for allowing the dogs to retract and includes a shoulder for locking the dogs outwardly. A locking spring urges the dogs downwardly onto the sleeve shoulder but allows the dogs to move upwardly into alignment with the sleeve recess. A releasing spring acts on the expander sleeve for urging the sleeve upwardly for moving the sleeve shoulder under the dogs but allows the dogs to retract into the sleeve recess on downward movement of the sleeve relative to the body. The body may include pressure equalizing ports and a pressure prong releasably positioned in the body and initially blocking the port.

Abstract: An hydraulic packer assembly for sealing an annulus between a well casing and a tubing string inserted within the well casing comprises a packer (10) and a setting tool (12). The packer includes a packer body (22) having an internal bore (23) with a seal (18) and gripping members (20) mounted on its exterior surface for engaging the interior surface of the well casing. Actuating mechanisms are provided within the packer for expanding the seal and gripping members into contact with the casing wall, which mechanisms include a piston and cylinder arrangement operated by fluid pressure conveyed from the tool interior to the cylinder. The setting tool is releasably coupled to the packer body to mount it on a tubing string and for conveying fluid pressure to the actuating mechanisms. Seals on the setting tool provide a fluid tight seal between the setting tool and the axial bore through the packer body.

Abstract: A retrievable well tool which can be lowered into a well casing and set on a wire line and thereafter moved for resetting or retrieval with a drill string. The tool includes a body having expandable slips mounted thereabout for anchoring with the casing. Drag blocks which are longitudinally slidable along the body slide from a first to a second position to expand the slips. A lug on the drag blocks is received into a channel on the body. Manipulation of the plug body effects locking the drag blocks into their first position. Shear bolts maintain the drag blocks in their first position when the tool is initially lowered into the casing on a wire line. A shiftable abutment adjacent the drag blocks is selectively operated to shear the bolts and shift the drag blocks to their second position to anchor the tool.

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: A well packer for high pressure and temperature use having a tubular mandrel, upper and lower slip assemblies in spaced relation on the mandrel and a high temperature and pressure seal assembly including a plurality of annular elements of different elasticities mounted on the mandrel between the slip assemblies. The slip assemblies are arranged so that the lower slip assembly sets first and the upper slip assembly last while the upper slip assembly releases first and the lower slip assembly releases last when pulling the packer. The upper slip assembly includes a collet expander wedge and a support ring for holding the collet wedge expanded and releasing the collet wedge in running and pulling the packer. The packer is designed for temperatures at least as high as 600.degree. F. and pressures of at least 5000 psi.

Abstract: A side pocket mandrel designed primarily for controlling the flow of production fluid into a tubing string includes a sliding sleeve valve in the side wall receptacle for alternatively closing and opening the entry port into the receptacle. The sleeve valve is latched in its port-closing position, but is designed to enable removal from the receptacle bore for servicing; and a pulling tool is provided for removing the sleeve valve from the receptacle when desired. The sleeve is shifted to its port-opening position when a standing flow control valve is placed in the receptacle; and the standing valve has a large valve chamber and side entry and exit ports for the production fluid to provide for maximum flow. The standing valve provides a check valve into the producing zone, the valve closure member being a modified ball consisting of a cylindrical body with spherical ends and coacting with a spherical valve seat.

Abstract: A device for disengaging a grappling device from a core barrel, which are lowered in an engaged or connected state into a hollow drill rod, is actuated by a recess made in the drill rod bore, when the barrel approaches or assumes a working position in the drill rod, and is thereby displaced by a spring for disengaging the mechanism connecting the grappling device and barrel.

Abstract: A seal assembly releasing tool is shown having an outer support case and an inner unlocking element rotatably mounted on a shaft and coupled by a planetary gear train. The seal assembly is provided with cam surfaces into which cam followers latch for securely connecting the tool to the seal assembly and enabling the outer case to turn the assembly in one direction while the inner element turns the locking sleeve of the seal assembly in the other direction to release the seal assembly.

Abstract: A seal assembly is disclosed including first and second annular members mutually movable longitudinally to effect a first configuration in which the seal assembly is releasably anchored to a cylindrical body circumscribed by the seal assembly, and a second configuration in which the seal assembly is releasably anchored to a surrounding conduit. Sealing members are carried by the seal assembly to engage the enclosed cylindrical body as well as the circumscribing conduit. Operation of the seal assembly for movement between the first and second configurations is accomplished by manipulation of the cylindrical body which, with the seal assembly anchored to the conduit, is permitted limited longitudinal movement relative to the conduit and seal assembly while maintaining sealing engagement with the seal assembly. A disclosed embodiment includes a well seal assembly, or packer, for sealing a pipe string to a well conduit.

Abstract: This invention relates to an expendable tool, such as a plug assembly, which may be locked within a tubular member, such as a packer assembly, located within a well casing, and a method of locating and releasing same. The plug assembly comprises a main housing adapted to support a plurality of circumferentially spaced, radially retractable locking segments. A longitudinally extending mandrel is slidably mounted within the housing and is axially shiftable from an first position, wherein the mandrel maintains the locking segments outwardly within a cooperating groove formed in the packer assembly, to a second position, wherein the locking segments are permitted to move out of engagement with the well packer. A collet sleeve is secured to the mandrel by a shear pin and maintains the mandrel in the upper position. When it is desired to release the plug from the packer assembly, an actuating sleeve is attached to the lower end of a tubing string and run down the well casing to be engaged by the collet sleeve.

Abstract: A well tool assembly comprising a drillable cement retainer and setting tool includes a connection between a setting-tool mandrel and a retainer mandrel allowing for opening and closing of a cement valve in the retainer without disconnecting the setting tool from the retainer. A releasable locking mechanism in the connection keeps a tubular connector between the setting-tool mandrel and the retainer mandrel locked against sliding relative to one of the mandrels prior to deploying an upper slip set of the cement retainer. Additionally, a carrier in the setting tool includes radially resilient lugs connected between the setting-tool mandrel and a retaining sleeve for the upper slip set for sliding upwardly on the setting-tool mandrel to carry the sleeve into an upper position releasing the upper slip set for deployment. A set lock in the retainer holds the retainer mandrel against movement downwardly once the retainer is anchored in the well.

Abstract: Well tubing coupling apparatus of the tubing seal divider type adapted for remote hydraulic release control to permit a tubing string including well tools above a packer to be removed for servicing from a lower tubing string extending through a packer while temporarily plugging the lower tubing string, such apparatus including a lower tubular housing section connectible on a lower tubing string and having a hydraulic lock and an upper housing section connectible on an upper tubing string adapted to mate with the lower housing section and having a latch operable with the hydraulic lock to releasably couple the housing sections together. Both annulus responsive and tubing responsive forms of the coupling apparatus are shown. An upper tubing string and the upper housing section is released from and reconnected with the lower tubing string and lower housing section by hydraulic pressure.

Abstract: The present invention provides a setting tool having a tubular sleeve assembly. An upper mandrel is disposed within said sleeve assembly and interconnected therewith by a rotational screw jack means. A lower mandrel is connected to the upper mandrel by a load transfer device for governing a maximum downward force which can be applied to the lower mandrel when the setting tool is set down on a packer. The load transfer means includes a casing connected to the upper mandrel, said casing having a support surface for engagement with an upper end of a packer mandrel. Resilient spring means is provided between the casing and the lower mandrel, and is constructed so that when said support surface is in engagement with said packer mandrel, a downward force applied to said lower mandrel must be transmitted through said resilient spring means.

Abstract: A wireline releasable sealing connector is connected in a tubular pipe string together with a packer which is adapted to be set in the well casing. The connector is releasable and connectable without rotation of the pipestring. Tension is transmitted through the connector by a latching collet which is locked against release in response to relative longitudinal movement between an outer body and an inner sealing mandrel, unless, while the connector is in compression, a wireline tool is seated within the connector and engages a connector collet and thereby prevents locking of the latching collet.

Abstract: Well bore apparatus is installed in a well casing on a tubular string having a packer anchored in and forming a seal within the casing. In the tubing string above the packer is a safety valve structure held open by the pressure of fluid supplied through control fluid tubing extending to the top of the well between the exterior of the tubing string and the casing. A long tubing seal structure has a lock releasable by the pressure of fluid supplied through the tubing string. The tubing seal structure is released to enable the tubing string to move freely in either direction, in response to pressure and/or temperature changes, whereby tension and compression reversals are eliminated. The tubing string above the sealing receptacle can be pulled from above the packer and other downhole structures. The hydraulic release is operable by fluid pressure to release the receptacle for longitudinal movement relative to a long sealing slick joint.

Abstract: Well bore apparatus is installed in a well casing on a tubular string having a packer anchored in and forming a seal within the casing. In the tubing string above the packer is a safety valve structure held open by the pressure of fluid supplied through control fluid tubing extending to the top of the well between the exterior of the tubing string and the casing. A long tubing seal structure has a lock releasable by the pressure of fluid supplied through the annulus, or alternatively by rotation of the tubing in an emergency.The tubing seal structure is released to enable the tubing string to move freely in either direction, in response to pressure and/or temperature changes, whereby tension and compression reversals are eliminated. The tubing string above the sealing receptacle can be pulled from above the packer and other downhole structures.

Abstract: Disclosed is a running tool for running sensitive well equipment into a well. Once the well equipment has been landed in the well, the running tool releases therefrom upon the application of a steady force. This abstract of the disclosure is neither intended to define the scope of the invention which, of course, is measured by the claims, nor is it intended to limit the invention in any way.

Abstract: A well packer and service seal unit for setting the packer in a well bore and depositing a gravel or slurry pack within the well bore. The packer includes a tubular mandrel connectible with a tubing handling string and adapted to support a gravel pack sand screen below the packer, a setting sleeve, top slips, bottom slips, internal slips, and seal elements supported on the mandrel for holding the packer in a well casing against a pressure differential in either direction and sealing with the casing to isolate a producing zone in the well bore. The service seal unit is insertable into the packer for supporting the packer as it is lowered in the well bore, setting the packer, and directing fluid flow to place the gravel or slurry pack in the well bore around the screen below the packer seal elements.

Abstract: A releasing tool for use in gravel packing operations comprising case means for releasably attaching the releasing tool to a tubing string, releasing block means retained within the case means for releasably attaching the releasing tool to the hook-up nipple of a gravel pack screen assembly and releasing mandrel means slidably disposed within the case means for alternately allowing the releasing block means to engage and disengage the hook-up nipple of a gravel pack screen assembly.

Abstract: Disclosed is a well latch for locking well tools in a well flow conductor. The latch housing has a pressure equalizing passage extending through its wall. A valve controls flow through the equalizing passage. Keys, carried by the latch housing, are expanded outwardly into a locking groove of a well flow conductor to lock the well latch therein. A fishing neck, associated with the latch, permits retrieval of the latch. This abstract is neither intended to define the scope of the invention, which, of course, is measured by the claims, nor is it intended to be limiting in any way.

Abstract: An apparatus is provided for selective mechanically activated latching and fluid activated locking and unlocking of a tubular string within an anchor assembly in a subterranean bore, wherein the anchor assembly has defined thereon co-engaging elements for selectively latching and locking of a tubular string with the anchor assembly. The apparatus comprises a housing which contains second co-engaging means which are complimentarily operational with the first co-engaging means. A longitudinally shiftable sleeve is initially secured to at least one of the housing and the second co-engaging means and is initially positioned with respect to the second co-engaging means whereby the second co-engaging means is selectively and repeatably latchable with respect to the first co-engaging means.

Abstract: A well system and method for completing petroleum oil and gas wells having special application to extreme environmental settings such as platform, sub sea, and floating vessel operations, and wells in frozen regions such as the Arctic, and the like. The invention is characterized by structure effectively defining a downhole wellhead including weight supporting apparatus in which the tubing hanger is supported and a pack-off with the casing for minimizing the effects of structural damage at the surface end of the well system.

Abstract: A tubing hanger for suspending multiple strings of tubing in a subsea wellhead or casing hanger upon being lowered from the drill vessel into a properly oriented seating position in the casing hanger. The tubing hanger is releasably secured to the casing hanger by hydraulic manipulation of the running tool after the tubing hanger has been oriented in the casing hanger. Thereafter, by further hydraulic manipulation, the running tool is released from the hydraulic set tubing hanger for retrieval to the drill ship. The running tool may later be returned and connected to the tubing hanger and, by further manipulation of the running tool, the hanger is disconnected from the casing hanger and elevated to the drill ship.

Abstract: An apparatus and method are provided for running, setting and anchoring a liner in a well bore casing, said apparatus being connectable to a tubular member extendible to the top of the well. The apparatus comprises an inner longitudinally extending body with an outer longitudinally extending body being around the inner body. Connection means on one of said inner and outer bodies are provided for connection of a liner extending below the apparatus. Expander means are carried on one of the inner and outer bodies, with gripping means being carried on the other of the inner and outer bodies. The gripping means are engagable with the expander means such that the gripping means are shifted into gripping engagement with the casing. A manipulatable tubular running tool is releasably secured to the inner and outer bodies.

Abstract: A tool for testing conditions at a specific depth in a well is run into the well on a wire line and set in a locking mandrel which in turn is set in a landing nipple in tubing string in the well. The tool is adapted to seal against the wall of the central bore through the locking mandrel and is locked in position by engagement of locking dogs on the tool in a recess in the fishing neck of the locking mandrel. The locking dogs are in a sleeve which surrounds and is slidable longitudinally along the body of the tool. On lifting the tool with a wire line to cause upward movement of the body relative to the sleeve, pressure release ports are moved to a communicating position and the locking dogs are withdrawn to disengage the locking mandrel to permit retrieval of the tool. The tool is of particular value in measuring the pressure or temperature in the well at a specific depth but is suitable for a wide variety of uses in which it is necessary to isolate temporarily a portion of the well.

Abstract: In accordance with an illustrative embodiment of the present invention, there is disclosed herein a device for anchoring downhole apparatus such as a safety valve in a tubing landing nipple, and a running tool for lowering the anchoring device at the end of a wire line into the tubing.The anchoring device comprises a body member that carries locking dogs which are shifted outwardly and engaged by the longitudinal movement of an expander mandrel. An expansible ring that is maintained on the mandrel by shear pins functions to lock the mandrel in the engaged position of the dogs. The running tool comprises a control sleeve having pivotally mounted connecting keys which remain engaged with the mandrel until the locking dogs are properly engaged and which then are released automatically from the mandrel. A safety shear pin makes it possible to free the running tool from the anchoring device in the event of incorrect anchoring of the latter and, when sheared, provides a "tell-tale" of incorrect installation.

Abstract: A well running tool used for lowering and setting well bomb hangers and various tool string hangers in a well and then disengagement for removal from the well, leaving the hanger set in place in the well. It is a soft set running tool designed to disengage from a bomb hanger, or other well tool hanger, with an upward pulling force substantially greater than the weight of the bomb hanger or other tool hanger, being positioned in the well after the hanger is key lock set in place down the well.

Abstract: An oil well tool containing a well packer and which is particularly suitable for use in well bores located in extremely cold climates utilizes an hydraulically actuated packer which is actuatable when the well head is flanged up and releasable thermal expansion means for compensation against thermal expansion and contraction in the tool string.