Detents Or Clutches Patents (Class 166/237)
  • Patent number: 4862957
    Abstract: A packer and service tool assembly for oil or gas well preparation includes a disengageable coupling mechanism which permits the tool to be screwed into and out of the packer and which can be hydraulically disengaged so that the tool can be removed without applying torque to the tool or workstring. A releasable ratchet mechanism is also provided in the packer for trapping the setting loads when the packer is set in the casing. The ratchet mechanism is releasable by pulling up a housing portion which cammingly engages collapsible ratchet fingers thereby disengaging the ratchet finger trapping teeth from a stationary ratchet ring.
    Type: Grant
    Filed: February 23, 1988
    Date of Patent: September 5, 1989
    Assignee: Dowell Schlumberger Incorporated
    Inventor: Joseph D. Scranton
  • Patent number: 4856591
    Abstract: A method and apparatus for effecting the completion of non-vertical, including horizontally disposed, portions of a deviated well bore traversing a production formation. To facilitate the insertion of a gravel packing tool string through the curved portion of the well bore, stabilizer elements are maintained in a radially retracted position and then operated to engage the well bore after the tool string is run-in. An anti-rotation tool may be incorporated for connecting the work string to the left hand threads conventionally provided on a conventional packer in order to permit rotation of the entire tool string to facilitate passage through the curved portion of the well bore. Two gravel packing modifications are disclosed, the one employing a single packer and a cross-over tool located at the top end of a plurality of serially connected screens.
    Type: Grant
    Filed: March 23, 1988
    Date of Patent: August 15, 1989
    Assignee: Baker Hughes Incorporated
    Inventors: Joseph F. Donovan, Edward C. Spatz, John V. Salerni, Elmer R. Peterson, John B. Weirich
  • Patent number: 4848455
    Abstract: A drill rod apparatus for quick rotary deep drilling has its drill pipes connected by flexible joints so that the rotation of a nut relative to a housing of each joint permits separation of the pipe ends connected thereby and the arrays of interengageable claws. The housing is connected to one of the pipes by a ball and socket joint so that with such separation, while a seal is maintained between the interiors of the two pipes, one pipe can be angularly offset from the other by substantially as much as 30.degree..
    Type: Grant
    Filed: November 27, 1987
    Date of Patent: July 18, 1989
    Inventor: Janos Fenyvesi
  • Patent number: 4848463
    Abstract: A well testing apparatus includes a housing having a formation fluid flow passage. A sliding sleeve tester valve is reciprocably disposed in the housing. A probe separable from the housing and constructed to be received coaxially within the sliding sleeve tester valve has a probe passage defined therethrough for communicating the formation fluid flow passage with a measuring device carried on the probe. A probe valve is also disposed in the housing and is constructed to receive a lower end of the probe. A releasable connector operably connects the probe and the sliding sleeve tester valve so that the sliding sleeve tester valve is moved between its open and closed positions in response to reciprocal movement of the probe relative to the housing. The tester valve can be operated an indefinite number of times, and whenever desired the probe can be disconnected from the tester valve in response to an appropriately timed reciprocable motion of the probe.
    Type: Grant
    Filed: November 9, 1988
    Date of Patent: July 18, 1989
    Assignee: Halliburton Company
    Inventors: Paul D. Ringgenberg, Burchus O. Barrington
  • Patent number: 4844154
    Abstract: A well packer for sealing an annular space within a well bore around a tubing string including a tubular mandrel, an expandable seal assembly on the mandrel for sealing around the mandrel with a well bore wall, a slip assembly on the mandrel for releasably locking the packer with the well bore wall, a drag spring and slip carrier assembly around the slip assembly, and an interlock assembly for selectively coupling the drag spring and slip carrier assembly with the mandrel for operating the packer through running, set, and release modes. The packer also includes an emergency release feature for releasing the packer in the event that well obstructions or other problems prevent normal rotation of the tubing string and mandrel to operate the interlock assembly.
    Type: Grant
    Filed: June 23, 1988
    Date of Patent: July 4, 1989
    Assignee: Otis Engineering Corporation
    Inventors: Colby M. Ross, Pat M. White
  • Patent number: 4840229
    Abstract: A production sub carrying a plurality of annular locator rings is coupled in series relation with downhole production equipment. A collet latch assembly including fixed and floating collet members is connected to a down hole service tool and is inserted into releasable coupling engagement with the annular locator rings of the production sub. Resilient finger portions of the fixed collet are alternately supported and unsupported by the floating collet to establish positive engagement with a selected one of the annular locator rings or to permit passage of the latch assembly with respect to the locator ring. The foregoing arrangement provides positive restriction to longitudinal movement of a work string which allows a downhole service tool attached to the work string to be selectively positioned at predetermined operating locations relative to downhole equipment.
    Type: Grant
    Filed: September 18, 1987
    Date of Patent: June 20, 1989
    Assignee: Otis Engineering Corporation
    Inventors: Lewis D. Proctor, Colby M. Ross, Brian P. Manzi, Frank Giusti, Jr.
  • Patent number: 4836287
    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).
    Type: Grant
    Filed: October 15, 1987
    Date of Patent: June 6, 1989
    Assignee: Merip Oil Tools International (MOTI) S.A.
    Inventors: Couste Eric, Jacob Jean-Luc
  • Patent number: 4834185
    Abstract: Method and apparatus for supporting a liner on an operating string mandrel so that the liner can be lowered into a well bore and selectively rotated and reciprocated. The liner includes rigid splines which are initially engaged with rigid splines releasably engaged on the operating string mandrel to enable the liner to be selectively rotated and reciprocated before positioning on the well bore casing.The liner is secured or positioned on the well bore casing and the operating string can then be manipulated to release the mandrel from the rigid splines releasably engaged thereon. The mandrel rigid splines and mandrel have cooperating surfaces which reconnect the mandrel rigid splines to the mandrel whereupon the mandrel rigid splines can then be disengaged from the liner rigid splines so that the mandrel can be released from the liner.
    Type: Grant
    Filed: January 15, 1988
    Date of Patent: May 30, 1989
    Assignee: Texas Iron Works, Inc.
    Inventor: Britt O. Braddick
  • Patent number: 4828023
    Abstract: A mechanical latching device for repeatable latching and unlatching of downhole well tools is adapted for use in a mandrel interconnected with a tubing string of a well, the mandrel forming a downwardly directed internal shoulder. The latch mechanism incorporates a fishing neck adapted for interconnection with the downhole tool. The fishing neck is disposed in upstanding generally centralized relation within the mandrel. A collet member which may be a component part of a well service tool or which may be a component part of the latch mechanism defines pulling shoulders at the free extremity of collet fingers defined thereby. A latch retainer is disposed in movable relation about the fishing neck and is movable between latched and unlatched positions relative to the fishing neck. In the latched position the latch retainer provides external support for the collet fingers to maintain the collet fingers in latching interengagement with a pulling flank.
    Type: Grant
    Filed: January 19, 1988
    Date of Patent: May 9, 1989
    Assignee: Eastern Oil Tools PTE, Ltd.
    Inventor: Henry H. Leggett
  • Patent number: 4813497
    Abstract: There is disclosed an adjustable bent sub for use in directional drilling in earth formations which is adapted to be placed between the power unit and bearing assembly components of a downhole motor and which can be angularly adjusted without requiring disassembly of the downhole motor unit.
    Type: Grant
    Filed: April 14, 1988
    Date of Patent: March 21, 1989
    Inventor: Kenneth H. Wenzel
  • Patent number: 4805696
    Abstract: A hydraulic release tubing seal divider for connecting lower and upper tubing strings together in a wellbore, including an inner housing assembly connected with one of the tubing string and middle and outer housing assemblies connected with the other of the tubing strings, including hydraulically operable locking structure carried by the middle and outer housing assemblies for locking the tubing strings together while the strings are run into a well, and for hydraulically releasing the middle and outer housing assemblies from the inner housing assembly to permit relative telescopic movement in the well between the upper and lower tubing strings at the tubing seal divider.
    Type: Grant
    Filed: February 3, 1988
    Date of Patent: February 21, 1989
    Assignee: Otis Engineering Corporation
    Inventor: William D. Henderson
  • Patent number: 4797075
    Abstract: A progressing cavity well pump has an overspeed brake to protect the gear box during reverse rotation. A power source rotates an input shaft of the gear box, which through a right angle drive, drives a string of rods extending into the well to the progressing cavity pump. A centrifugal brake is mounted to the input shaft. If the pump locks up, the power source will impart energy to the rods by twisting them until the power source reaches its limit. When the rods start to unwind, the centrifugal brake will engage to dissipate energy and slow the speed of the reverse rotation.
    Type: Grant
    Filed: April 9, 1987
    Date of Patent: January 10, 1989
    Assignee: Hughes Tool Company
    Inventors: Wallace L. Edwards, Joel F. Jones, Howard G. Thompson, Jr.
  • Patent number: 4793411
    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.
    Type: Grant
    Filed: June 29, 1988
    Date of Patent: December 27, 1988
    Assignee: Halliburton Company
    Inventor: Gary D. Zunkel
  • Patent number: 4765402
    Abstract: A self-locating seal assembly is shown for sealing between a well string and the bore of a surrounding well conduit, the surrounding conduit being provided with an internal recess for engagement by the seal assembly. A mandrel has an internal bore, an exterior, and a lower end. A seal body is carried about the mandrel and has an external seal region for engaging the interior bore of the surrounding well conduit and an internal seal region for engaging the mandrel exterior. The seal body provided with a plurality of window openings, each opening having an upper and lower tapered ramp surface. An upper and a lower sleeve circumscribe the seal body about the window openings and are spaced to define a circumferential opening with respect to the exterior of the seal body. A plurality of latch elements are carried in the annular circumferential opening and have camming surfaces which cooperate with the ramp surfaces of the window openings.
    Type: Grant
    Filed: April 22, 1987
    Date of Patent: August 23, 1988
    Assignee: Hughes Tool Company
    Inventor: Sydney K. Smith, Jr.
  • Patent number: 4760884
    Abstract: An apparatus and method of operation for the release of concentric tubing strings used in well operations. In the preferred embodiment, the apparatus includes a tubing release assembly and an air chamber assembly as an actuating tool. The tubing release assembly comprises a housing, release sleeve, adjustment nut, pull tube mandrel, pull tube adapter, pull tube latch and retainer ring. The air chamber assembly as an actuating tool comprises a lower end plug, a housing, a housing retainer, seal element assembly, upper and lower shear pin retainers, upper element cone, release ring, setting mandrel, upper end plug, retrieving mandrel, and match drill assembly. Alternately, the tubing release assembly may be actuated by a ball and increased fluid pressure level within the interior of the tubing release assembly.
    Type: Grant
    Filed: September 16, 1986
    Date of Patent: August 2, 1988
    Assignee: Halliburton Company
    Inventors: David M. Haugen, Flint R. George, Kevin R. George
  • Patent number: 4756364
    Abstract: A packer bypass for use between a pump and packer in a testing string for venting said pump and packer to a well annulus after completion of a testing operation. The packer bypass comprises a case with an inner flow tube disposed therein such that an annular passageway is defined therebetween. A piston having a lower portion is reciprocably disposed in the annular passageway. A plurality of latching fingers are pivotally mounted to the lower end of the piston and biased towards a latching position. A bypassing mandrel is reciprocably disposed in the annular passageway below the piston and has an open position for bypassing pump pressure thereabove and packer pressure therebelow to the well annulus and also has a closed position in which bypassing is prevented. The mandrel may be raised from the closed position to the open position by lowering the piston and engaging the latching fingers with a flange on the mandrel.
    Type: Grant
    Filed: December 10, 1986
    Date of Patent: July 12, 1988
    Assignee: Halliburton Company
    Inventors: Jon B. Christensen, Harold K. Beck, Vincent P. Zeller
  • Patent number: 4749341
    Abstract: A well pump suspended from a mandrel in a well which is run on a cable placed in tension after the pump supporting mandrel is landed. The mandrel is latched in the well and a much greater force is required to release the mandrel from the tubing than was required to move the mandrel to the latched position. The cable includes multiple wire drum sockets which are moved laterally into recesses in the supporting mandrel and held in place by a moveable sleeve. A space out is provided between the mandrel and the cable. The conductors of the cable are brought out of the space out structure to the exterior of the mandrel and extend down through a penetrator which forms a part of the mandrel. The space out structure, the connection between the space out structure and cable, and the mandrel and penetrator components, and the pump are all held against relative rotation to avoid damage to the conductors.
    Type: Grant
    Filed: September 29, 1986
    Date of Patent: June 7, 1988
    Assignee: Otis Engineering Corporation
    Inventor: Russell I. Bayh, III
  • Patent number: 4745974
    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.
    Type: Grant
    Filed: December 22, 1986
    Date of Patent: May 24, 1988
    Assignee: Otis Engineering Corporation
    Inventor: Brian D. Higgins
  • Patent number: 4745973
    Abstract: A downhole running tool for positioning and locking tool support mandrels within landing nipples of the production tubing string of a well. A housing is provided which forms an internal receptacle receiving upper and lower core sections forming an elongated core which is telescopically movable to collapsed and extended positions defined by spaced stops formed by the housing. A portion of the core extends from the housing for connection with a tool support mandrel. A collet type releasable retainer secures locking lugs of the housing in a substantially fixed position within the internal receptacle and is movable to a lug release position upon contact with the landing nipple during upward movement of the downhole running tool to thus permit spring urged movement of the core to force the mandrel from its retracted position to its locating position.
    Type: Grant
    Filed: April 23, 1987
    Date of Patent: May 24, 1988
    Inventor: James E. Semar
  • Patent number: 4745982
    Abstract: An adjustable bent sub for use in directional drilling in earth formations comprises a first body member having a first body portion defining a first primary axis and a second body portion defining a first secondary axis disposed at a first offset angle with respect to the first primary axis, a second body member having a first body portion defining a second primary axis and a second body portion defining a second secondary axis disposed at a second offset angle with respect to the first primary axis, the second body member being adapted to be secured to the first body member such that the first secondary axis and the second primary axis are coaxial and define a common axis and the second body member is rotatable about the common axis. A device is provided for non-rotatably coupling the second body member to the first body member in predetermined angular relation about the common axis so as to provide a predetermined angular relationship between the first primary axis and the second secondary axis.
    Type: Grant
    Filed: November 28, 1986
    Date of Patent: May 24, 1988
    Inventor: Kenneth H. Wenzel
  • Patent number: 4726421
    Abstract: There is disclosed a device for latching a well tool within the seal bore of a pocket to one side of a bore through a mandrel connectable in the well string. The mandrel has a recess above the seal bore to receive latching dogs on the lower end of collet fingers carried by the device and an upwardly facing shoulder above the recess which engages the latching dogs to cause them to be flexed inwardly as they are lowered into positions opposite the recess.
    Type: Grant
    Filed: March 17, 1987
    Date of Patent: February 23, 1988
    Assignee: AVA International Corporation
    Inventors: Neil H. Akkerman, John P. Hare
  • Patent number: 4722392
    Abstract: A production sub carrying a plurality of annular locator rings is coupled in series relation with downhole production equipment. A collet latch assembly including fixed and floating collet members is connected to a down hole service tool and is inserted into releasable coupling engagement with the annular locator rings of the production sub. Resilient finger portions of the fixed collet are alternately supported and unsupported by the floating collet to establish positive engagement with a selected one of the annular locator rings or to permit passage of the latch assembly with respect to the locator ring. The foregoing arrangement provides positive restriction to longitudinal movement of a work string which allows a downhole service tool attached to the work string to be selectively positioned at predetermined operating locations relative to downhole equipment.
    Type: Grant
    Filed: March 31, 1986
    Date of Patent: February 2, 1988
    Assignee: Otis Engineering Corporation
    Inventors: Lewis D. Proctor, Colby M. Ross, Brian P. Manzi, Frank Giusti, Jr.
  • Patent number: 4722393
    Abstract: A minimum backlash latch assembly for releasably locking a well tool such as a pilot valve in a bore such as in a side pocket mandrel of a well flow conductor. Also disclosed is a pilot valve system for a subsurface safety valve operated by control fluid pressure from the surface including a pilot valve connected with the control fluid line to the subsurface safety valve and into the well production string immediately above the safety valve to bypass the control fluid pressure directly into the tubing string and dump the control fluid pressure from the subsurface safety valve into the tubing string directly above the valve to minimize the time delay between control fluid pressure reduction and the safety valve closure. Three embodiments of the pilot valve are disclosed. One embodiment is operable by electrical energy from the surface. The other embodiments are operable by acoustic energy and radio waves, respectively.
    Type: Grant
    Filed: April 29, 1987
    Date of Patent: February 2, 1988
    Assignee: Otis Engineering Corporation
    Inventor: William D. Rumbaugh
  • Patent number: 4721163
    Abstract: A tubing hanger alignment system for a subsea well, periodically subjected to treatment by removing the well tubing and inserting treating tools therein, wherein a tubing guidance system cooperating with the wellhead for engaging a downwardly moving tubing hanger running system thereby to rotate said tubing hanger sufficiently to position the carried tubing at a predetermined relationship with the wellhead, thereby providing access into the tubing hanger for sealing elements of an over-positioned subsea tree co-operative with the wellhead.
    Type: Grant
    Filed: February 27, 1986
    Date of Patent: January 26, 1988
    Assignee: Texaco Limited
    Inventor: Peter J. R. Davis
  • Patent number: 4715445
    Abstract: A latch and retrieving assembly is shown for use with a well tool having an axial bore which includes an external landing shoulder and an annular latch recess which is spaced below the landing shoulder. The assembly includes a mandrel which is inserted in to the bore of the well tool. The mandrel has a lower abutment and a collet member carried about the mandrel above the abutment. The collet member includes a carrier ring which is seatable on the shoulder and a plurality of fingers which depend from the carrier ring and which terminate in radially enlarged tips which are disposed in registration with the recess when the carrier ring is seated on the landing shoulder. The tips cooperate with the lower abutment to latch into and to be released from the recess respectively in response to downward movement of the mandrel. A special profile formed on the mandrel lower abutment provides latching engagement and subsequent release of the assembly upon downward movement of the mandrel relative to the collet.
    Type: Grant
    Filed: December 9, 1986
    Date of Patent: December 29, 1987
    Assignee: Hughes Tool Company
    Inventor: Sidney K. Smith, Jr.
  • Patent number: 4697638
    Abstract: Disclosed is a downhole logging and servicing system with manipulatable logging and servicing tools. The system includes a conveyor for running the tools into and out of the well bore and a manipulating apparatus operable responsive to fluid pressure to manipulate the tools. The manipulating apparatus includes a fluid operated incremental rotating device connected to the conveyor and control device operated by the rotating device to manipulate the tools.
    Type: Grant
    Filed: January 22, 1986
    Date of Patent: October 6, 1987
    Assignee: Gearhart Industries, Inc.
    Inventor: Orien M. Knight
  • Patent number: 4681166
    Abstract: A tie-back connector for a subsea well allows the tie-back connection to be made without rotation. A set of threads is located on an inner wall of the outer conduit into which the tie-back connection is to be made. An annular latch is carried by the inner conduit which is being tied back from the surface to the outer conduit. The latch has threads on its exterior which ratchet past the threads on the inner wall as the inner conduit is lowered into the outer conduit. After the threads of the latch are ratcheted fully into alignment with the threads in the outer conduit, the inner conduit is pulled upwardly relative to the latch to secure it in tension. A retainer is actuated when the inner conduit is in the upper position to prevent the inner conduit from moving downwardly again relative to the latch. The inner conduit can be removed by rotation relative to the outer conduit.
    Type: Grant
    Filed: August 18, 1986
    Date of Patent: July 21, 1987
    Assignee: Hughes Tool Company
    Inventor: Glen H. Cuiper
  • Patent number: 4660637
    Abstract: A packer and service tool assembly for oil or gas well preparation includes a disengageable coupling mechanism which permits the tool to be screwed into and out of the packer and which can be hydraulically disengaged so that the tool can be removed without applying torque to the tool or workstring. A releaseable ratchet mechanism is also provided in the packer for trapping the setting loads when the packer is set in the casing. The ratchet mechanism is releasable by pulling up a housing portion which cammingly engages collapsible ratchet fingers thereby disengaging the ratchet finger trapping teeth from a stationary ratchet ring.
    Type: Grant
    Filed: September 11, 1985
    Date of Patent: April 28, 1987
    Assignee: Dowell Schlumberger Incorporated
    Inventors: Howard L. McGill, Joseph D. Scranton
  • Patent number: 4658895
    Abstract: A gravel pack safety sub selectively positionable in rotational or a non-rotational mode. The safety sub includes an adapter having lugs thereon and a mandrel having lugs thereon adjacent the adapter. A retainer attached to the adapter receives an end of the mandrel. The mandrel and retainer define an annular cavity therebetween, and a sleeve is positioned in the cavity. The sleeve has a hole therein which is nearer a first end thereof than a second end. The hole is alignable with an exterior recess in the mandrel and a shear pin positioned therethrough. The safety sub may be placed in a first position wherein the second end of the sleeve is adjacent the adapter and the lugs on the mandrel and adapter are separated. A bearing ring is positioned between the adapter and the mandrel for maintaining the separation of the lugs and providing a bearing surface therebetween.
    Type: Grant
    Filed: March 19, 1986
    Date of Patent: April 21, 1987
    Assignee: Halliburton Company
    Inventor: David P. Brisco
  • Patent number: 4637471
    Abstract: The present invention is directed to an apparatus and method for providing a tubing drain valve suitable for use in a borehole. The present invention is particularly useful in connection with production strings employed in wells producing heavy, sand-bearing oils. The invention comprises a tubing drain valve operable independently of any action or condition on the interior of the pipe string. The tubing drain valve of the present invention is opened in response to the pulling of the pipe string from the borehole. A plurality of dogs carried by a sleeve biased to an initial position about a tubular member suitable for incorporation in a pipe string and including a valved passage through the side wall thereof are designed to engage the casing and temporarily prevent movement of the sleeve as the pipe string is being pulled from the borehole. Continued pulling of the string produces relative movement of the sleeve and tubular member along the longitudinal axis of the tubular member.
    Type: Grant
    Filed: April 30, 1985
    Date of Patent: January 20, 1987
    Assignee: Soderberg Research & Development, Inc.
    Inventor: Paul B. Soderberg
  • Patent number: 4635718
    Abstract: A continuous obstruction monitor for well logging drill strings including a well logging instrument at the forward end thereof transports the logging instrument through an earth borehole while continuously monitoring for obstructions. An outer tubular housing is connected at its upper end to the drill string and a piston therein is connected to the upper portion of the logging instrument. The housing has a variable volume greater than the volume of an equal length of the drill string. The piston is electrically connected to the surface. A latch retains the piston in the lower portion of the housing, and releases it when an obstruction is encountered. The outer housing moves downward relative to the piston to a point where a sealing surface at the mid portion of the housing shuts off fluid flow below the piston and causing the drilling fluid to rise within drill string to be detected at the surface.
    Type: Grant
    Filed: July 5, 1985
    Date of Patent: January 13, 1987
    Inventor: Ralph R. Thomas
  • Patent number: 4632193
    Abstract: An in-hole fluid motor has a clutch engageable between the motor housing and the motor shaft to connect the housing and shaft for mutual rotation upon rotation of a running-in pipe string, and a circulation valve is installed above the motor to be opened to allow circulation from the pipe string into the bore hole annulus. Circulation is maintained through the bore hole annulus during efforts to release a stuck drill bit.
    Type: Grant
    Filed: July 6, 1979
    Date of Patent: December 30, 1986
    Assignee: Smith International, Inc.
    Inventor: Bela Geczy
  • Patent number: 4628998
    Abstract: Well apparatus is disclosed in which a well tool connected to a landing tool is lowered within a well conduit by means of a wire line running tool which, when the landing tool is so lowered, may be manipulated in order to cause locking means carried by the landing tool to be locked with a locking groove of the well conduit, and which when the landing tool is so locked, may be released therefrom for retrieval from the well conduit. The landing tool carries keys which may be landed and locked within a selected one of a plurality vertically spaced landing nipples of the conduit each of which has a cylindrical bore and a groove having an upwardly facing seat thereabout on which the key may be landed when spring pressed outwardly into the groove.
    Type: Grant
    Filed: May 6, 1985
    Date of Patent: December 16, 1986
    Assignee: AVA International Corp.
    Inventor: Neil H. Akkerman
  • Patent number: 4627492
    Abstract: A well tool having reciprocating portions can be locked in a predetermined position by a latching mechanism which is responsive to externally applied pressure, as opposed to mere movement of the reciprocating elements to the predetermined position. The actuating pressure can be applied through the annulus or through a pipe string in which the tool is located.
    Type: Grant
    Filed: September 25, 1985
    Date of Patent: December 9, 1986
    Assignee: Halliburton Company
    Inventor: Scott T. MacLaughlin
  • Patent number: 4605064
    Abstract: There is disclosed well apparatus including a wire line running tool assembly on which a well tool may be lowered into a well conduit, and then locked within the well conduit, and released from the assembly, when it is so locked, in response to manipulation of the wire line, whereby the assembly may be retrieved.
    Type: Grant
    Filed: March 5, 1985
    Date of Patent: August 12, 1986
    Assignee: AVA International Corp.
    Inventor: Neil H. Akkerman
  • Patent number: 4601333
    Abstract: A slide joint is shown which is used to provide a floating seal between an inner floating member and a surrounding conduit in a well bore. The floating member has a clutch element which is engaged at one end thereof. A circumferential, compressible packing is carried on the exterior of the floating member and is sandwiched between a fixed nut, at one end, and the clutch element at the other end. The clutch element includes downwardly extending clutch portions which are engageable with mating recesses provided within the inner bore of the surrounding well conduit when the floating member is run into position. The floating member can then be rotated by rotating the associated tubing string which extends to the well surface. As the floating member is rotated, the clutch element crawls up the externally threaded surface on the floating member in the direction of the compressible packing and the fixed nut.
    Type: Grant
    Filed: April 29, 1985
    Date of Patent: July 22, 1986
    Assignee: Hughes Tool Company
    Inventor: Robert W. Evans
  • Patent number: 4595054
    Abstract: A well lock including a landing nipple having a locking notch and landing shoulder and a lock for setting in the nipple. The lock includes a body and at least one retractable no-go dog radially movable in the body and adapted to engage the landing shoulder and at least one locking dog radially movable in the body and adapted to lock in the locking notch. A rigid expander tube telescopically moves in the body between a running and a set position. In a running position the no-go locking dogs are cammed outwardly while the locking dogs are retracted. When the set position is reached the locking dogs are cammed outwardly and a recess is aligned with the no-go dogs for allowing them to retract. A seal is provided between the body and the expander tube for protecting the nipple from well fluid abrasion.
    Type: Grant
    Filed: May 20, 1985
    Date of Patent: June 17, 1986
    Assignee: Camco, Incorporated
    Inventor: Alan G. Schroeder
  • Patent number: 4582135
    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.
    Type: Grant
    Filed: February 18, 1983
    Date of Patent: April 15, 1986
    Assignee: AVA International Corporation
    Inventor: Neil H. Akkerman
  • Patent number: 4582140
    Abstract: A downhole tool such as a formation tester valve which provides a bypass while allowing a choice of several possible functions of this bypass to be made by rearrangement of the parts of the tool. In a first arrangement, a bypass is provided which is open while the tool is run into the well, and is then closed and latched closed upon operation of the tool by setting down weight on the tool. Subsequent reopening of the tool does not reopen the bypass. In a second arrangement, an open bypass is provided as the tool is run into the well. The bypass again is closed when weight is set down on the tool to operate the tool, but in the second arrangement, the bypass reopens when weight is picked up to reopen the tool. In a third arrangement, the bypass port may be eliminated when it is desired to run the tool without a bypass.
    Type: Grant
    Filed: September 12, 1984
    Date of Patent: April 15, 1986
    Assignee: Halliburton Company
    Inventor: Burchus Q. Barrington
  • Patent number: 4577685
    Abstract: A temporary and retrievable protector sleeve for protecting a well landing nipple during working of the well. A landing nipple having a tubular body with a plurality of arcuate no go lugs circumferentially positioned. A body has a support for engaging the no go lugs on the interior of the nipple for supporting the body from the nipple. A releasable latch on the body releasably latches the body to the no go lugs. A spring engages the latch and yieldably urges the latch into a locking position. A sleeve section telescopically engages the body and the latch and retracts the latch and releases the body from the no go lugs when the section is moved relative to the body.
    Type: Grant
    Filed: August 31, 1984
    Date of Patent: March 25, 1986
    Assignee: Camco, Incorporated
    Inventor: William D. Eatwell
  • Patent number: 4576236
    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.
    Type: Grant
    Filed: May 10, 1984
    Date of Patent: March 18, 1986
    Assignee: Baker Oil Tools, Inc.
    Inventors: Gregg W. Stout, John A. Nelson, John H. Crisp
  • Patent number: 4574883
    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.
    Type: Grant
    Filed: November 24, 1982
    Date of Patent: March 11, 1986
    Assignee: Otis Engineering Corporation
    Inventors: Albert W. Carroll, Joseph L. Pearce
  • Patent number: 4573529
    Abstract: An anchor for a tubing string for use with a sucker rod pump is provided which defines a large fluid passage area for the passage of treatment fluids through the anchor. The anchor comprises a tubular body or body extensions having two vertically spaced sets of radial ports. A flow sleeve is positioned in straddling relationship across the bore of the anchor body and has its external surface recessed to provide an annular passage connecting the two sets of radial flow ports. The upper set of flow ports are connected to a tubular flow line extending to the well surface while the lower set of flow ports are connected tubular flow line extending to the production zone or to the location where corrosion, scale or other treatment becomes necessary. The flow sleeve is run into the well with a sucker rod pump on the sucker rod string and can be detachably latched to the tubing string in overlapping sealing relationship to the radial flow ports.
    Type: Grant
    Filed: March 12, 1984
    Date of Patent: March 4, 1986
    Assignee: Aker Oil Tools, Inc.
    Inventor: Paul A. Reinhardt
  • Patent number: 4545434
    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.
    Type: Grant
    Filed: April 24, 1984
    Date of Patent: October 8, 1985
    Inventor: Brian D. Higgins
  • Patent number: 4526229
    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.
    Type: Grant
    Filed: February 14, 1983
    Date of Patent: July 2, 1985
    Assignee: Gulf Oil Corporation
    Inventor: Richard C. Dickerson
  • Patent number: 4522259
    Abstract: There are disclosed two embodiments of well apparatus each including a well tool adapted to be lowered into and locked within a landing nipple of a well string, together with a running tool adapted to be connected to the well tool for lowering it into locking position and then causing it to be so locked within the nipple, following which the running tool is released from the well tool for retrieval from the well string.
    Type: Grant
    Filed: April 29, 1983
    Date of Patent: June 11, 1985
    Assignee: AVA International Corporation
    Inventor: Neil H. Akkerman
  • Patent number: 4487261
    Abstract: A well completion and testing system and method. The system includes a tubing string having an integral locking sub and a testing probe assembly for use with well testing instruments and having an equalizing and bypass valve, the probe assembly being releasably lockable in the locking sub and adapted to be manipulated from the surface to open and close the valve for testing a well under both shut in conditions and flowing conditions. The method includes running a tubing string including an integral locking sub into a well bore, running a tool train including well testing instruments connected with a locking probe having an equalizing and bypass valve, releasably locking the probe in the locking sub of the tubing string, and selectively manipulating the probe from the surface to open and close the valve of the probe while taking measurements with the well alternately shut in and flowing.
    Type: Grant
    Filed: August 5, 1981
    Date of Patent: December 11, 1984
    Assignee: Otis Engineering Corporation
    Inventor: Imre I. Gazda
  • Patent number: 4479539
    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.
    Type: Grant
    Filed: October 18, 1982
    Date of Patent: October 30, 1984
    Assignee: Otis Engineering Corporation
    Inventors: Jack W. Tamplen, Carter R. Young
  • Patent number: 4476943
    Abstract: Drilling equipment for steering relatively long boreholes in rock strata comprises an adaptor for installation adjacent to the drill bit, the adaptor having an inner rotary component drivably connected between the drill rod assembly and the drill bit and a relatively outer component. Releasable latch means are provided having two operational modes in the first of which the inner and outer components are fixedly engaged for rotary motion and in the second mode of which the inner component can rotate relative to the outer component. Also actuatable means are provided for controlling the operational mode of the releasable latch means.
    Type: Grant
    Filed: December 29, 1981
    Date of Patent: October 16, 1984
    Assignee: Coal Industry (Patents) Limited
    Inventor: David R. Williams
  • Patent number: 4441560
    Abstract: A setting tool is shown of the type adapted to be made up in a pipe string for releasably engaging a setting sleeve in a well bore. The setting tool has a mandrel having an upper end adapted to be connected in the pipe string and having a lower end. A setting nut is carried on the mandrel having external connecting threads for engaging mating connecting threads located on the interior of a setting sleeve disposed about the lower end of the mandrel. The mandrel is slidably disposed within the setting nut when the setting nut is engaging the setting sleeve and the mandrel is slidable between an extended running-in position and a weight set-down position.A latch collar having at least one latch ear is carried on the mandrel exterior.
    Type: Grant
    Filed: May 13, 1983
    Date of Patent: April 10, 1984
    Assignee: Hughes Tool Company
    Inventors: John L. Baugh, James W. Montgomery