Patents Assigned to Baker Oil Tools, Inc.
  • Patent number: 4530399
    Abstract: The invention provides a stop device for installation on a well conduit. The stop device is fabricated from semi-annular elements having one ends thereof pivotally interconnected by a hook and notch connection and the other ends stamped to provide apertured lugs traversed by a clamping device. The effective diameter of the stop is increased by a plurality of peripherally spaced, outwardly projecting notches formed in the top and bottom edges of the semi-annular elements.
    Type: Grant
    Filed: October 31, 1983
    Date of Patent: July 23, 1985
    Assignee: Baker Oil Tools, Inc.
    Inventor: Harry W. Riddle
  • Patent number: 4526408
    Abstract: A concentric insulating tubular conduit member for use in forming a conduit string such as a tubing string in a subterranean oil or gas well, is disclosed. Each individual conduit comprises concentric inner and outer members rigidly attached at each end. Both the inner and outer tubular members are welded to an intermediate bushing. At least one of the inner and outer members is upset to prevent weakening of the tubular joint at the welded connection. Adjacent tubular conduits can be interconnected by couplings having an outer surface flush with the outer periphery of the two interconnected joints.
    Type: Grant
    Filed: July 19, 1982
    Date of Patent: July 2, 1985
    Assignee: Baker Oil Tools, Inc.
    Inventor: David M. Anderson
  • Patent number: 4526233
    Abstract: A method and apparatus for releasing a subterranean well perforating gun from a tubular string after firing of the subterranean well perforating gun. The apparatus comprises two telescopically inter-related tubular assemblies which are interconnected for axial co-movement solely by a plurality of radially shiftable latching elements. Such latching elements are normally maintained in a locked position by an annular piston. One end of the annular piston is exposed to gas at surface ambient pressure and the other end is exposed to the gas pressure generated in the perforating gun by its discharge and subsequently to the well fluid pressures produced by flow of well fluids through the perforations. The movement of the annular piston under such fluid pressure forces permits the locking elements to be cammed radially inwardly and release the connection between the tubular tool string and the perforating gun without any action on the part of the operator.
    Type: Grant
    Filed: January 20, 1984
    Date of Patent: July 2, 1985
    Assignee: Baker Oil Tools, Inc.
    Inventor: Gregg W. Stout
  • Patent number: 4523649
    Abstract: A method and apparatus are provided for angularly aligning normally vertical rows of explosive charge containers mounted on a tubing conveyed perforating gun carrier so that none of the explosive charges is directed substantially vertically upwardly in the event that perforation is accomplished in a non-vertical section of the well casing.
    Type: Grant
    Filed: May 25, 1983
    Date of Patent: June 18, 1985
    Assignee: Baker Oil Tools, Inc.
    Inventor: Gregg W. Stout
  • Patent number: 4522272
    Abstract: An apparatus is provided for effecting a change in direction of a rotary drill bit relative to a work string. Two tubular components incorporated into the work string have a rotationally adjustable connection for angularly displacing the drill bit axis relative to the tubing string. One embodiment has the connection between a housing for the shaft of the drill bit and the housing for the motor which drives the shaft. The connection comprises a pair of cylindrically disposed interengagable surfaces formed on the adjacent ends of the motor shaft housing and the drill bit housing, which have axes that are slightly angularly displaced from the housing axes.
    Type: Grant
    Filed: March 8, 1983
    Date of Patent: June 11, 1985
    Assignee: Baker Oil Tools, Inc.
    Inventor: Herbert W. Beimgraben
  • Patent number: 4519262
    Abstract: A self-energizing, positive engagement safety mechanism for long stroke, well pumping units, whether powered mechanically or hydraulically, and which employ a lift belt and counterweight. Upon failure of the sucker rod, polish rod or lift belt, a latching mechanism is actuated to engage a rack on both sides of the counterweight thereby to arrest and lock the counterweight against free fall. Actuation of the latching means is controlled by sensing belt tension below the counterweight thereby to enhance the sensitivity and reliability of the safety mechanism.
    Type: Grant
    Filed: April 29, 1983
    Date of Patent: May 28, 1985
    Assignee: Baker Oil Tools, Inc.
    Inventors: Tam D. Le, Weems D. Turner
  • Patent number: 4515217
    Abstract: A method and apparatus for effecting the perforation of a well casing and the adjoining production formation comprises a tubular housing connected between a perforating gun housing and the lower end of a tubular string. The perforating gun housing contains a firing mechanism, and the tubular housing contains a radial port normally closed by a sleeve. The sleeve is inserted at the surface in an open bottom, annular chamber, thus trapping surface ambient air between one end of the sleeve and the closed end of the fluid pressure chamber. The other end of the fluid pressure chamber is connected by fluid passage means to the interior of the perforating gun housing, hence gas pressure generated by the discharge of the perforating gun and formation fluid pressure produced by formation fluids flowing through the newly formed perforations are brought in contact with the other end of the sleeve.
    Type: Grant
    Filed: December 27, 1983
    Date of Patent: May 7, 1985
    Assignee: Baker Oil Tools, Inc.
    Inventor: Gregg W. Stout
  • Patent number: 4515011
    Abstract: A downhole device which can be incorporated into the tubular drill string transmitting torque to the drilling bit and concurrently providing an indication of the torque transmitted. A telescopically interrelated housing and mandrel have their non-telescoped ends connected with the rotating power source and the drilling bit. A resilient torque transmitting mechanism, such as a helical spring, is mounted between the mandrel and the annular housing to transmit torque between such elements but at the same time produce an angular displacement of one element with respect to the other. A fluid passage is provided through the bores of the telescopically interrelated mandrel and the housing and communicating apertures are formed in the adjacent ends of such bores to produce a variable orifice whose pressure drop due to the flow changes as a function of the angular displacement of the housing and mandrel, hence as a function of the torque being transmitted.
    Type: Grant
    Filed: May 6, 1983
    Date of Patent: May 7, 1985
    Assignee: Baker Oil Tools, Inc.
    Inventor: Herbert W. Beimgraben
  • Patent number: 4513817
    Abstract: A sealing assembly comprising a casing bore receptacle, an annular packoff member, and a tubing carried mandrel for use in establishing sealing integrity between a fluid transmission conduit or tubing and an outer conduit or casing, is disclosed. The casing bore receptacle is incorporable in the casing and the annular packoff member is initially carriable on the mandrel. Seals on the interior and exterior of the packoff member establish a seal with the mandrel and the casing. Upon abutting engagement of the packoff member with the casing bore receptacle, a collet on the packoff member is released from the mandrel and cammed radially outward into engagement with the casing bore receptacle to anchor the packoff member to the casing bore receptacle. The mandrel can then move relative to the packoff member and the casing. A lock support sleeve is positioned intermediate the mandrel and the latching arms of the collet.
    Type: Grant
    Filed: October 1, 1982
    Date of Patent: April 30, 1985
    Assignee: Baker Oil Tools, Inc.
    Inventor: Roger A. Weinberg
  • Patent number: 4510995
    Abstract: A locking apparatus for positioning a well tool within a subterranean well bore and comprising a primary locking member attached to the well tool; a nipple incorporable in a subterranean well conduit; and running and retrieving tools for positioning the lock member is disclosed. The lock has a no-go shoulder for initially positioning the lock adjacent the nipple and radially expandable locking dogs for carrying both upwardly and downwardly directed forces upon full expansion thereof after the no-go shoulder has been disengaged. At least two interlocking members disengagable only by separate manipulations maintain the locking dogs in a radially expanded fully engaged position. A retrieving tool having a rotational alignment means to position the tool relative to the lock is used to separately manipulate the interlocking members and to pull the disengaged lock from the well.
    Type: Grant
    Filed: February 22, 1983
    Date of Patent: April 16, 1985
    Assignee: Baker Oil Tools, Inc.
    Inventors: William F. Krause, Jr., Mark E. Hopmann
  • Patent number: 4509599
    Abstract: A split-stream method and apparatus for preventing the accumulation of liquids, such as water or oil, in subterranean gas wells having low shut-in bottom hole pressures is provided. A compressor whose capacity can be less than the theoretical adiabatic horsepower for full wellhead depletion, is used to remove a two-phase liquid-gas mixture through a secondary fluid transmission conduit. Production of dry gas in larger quantities through a primary production conduit is then possible since liquids cannot accumulate to kill the well. An optional mechanism for initiating production in very low pressure wells and a means of preventing the buildup of paraffin is also described.
    Type: Grant
    Filed: October 1, 1982
    Date of Patent: April 9, 1985
    Assignee: Baker Oil Tools, Inc.
    Inventors: David V. Chenoweth, David M. McStravick
  • Patent number: 4508167
    Abstract: An annular packoff assemblage is provided for selective engagement with any one of a plurality of casing seal bore receptacles spaced along a casing string. The packoff assemblage includes an upper latching assemblage for cooperation with an upwardly facing no-go shoulder providing in the selected seal bore receptacle, an intermediate annular sealing assemblage for establishing sealing integrity between an inner mandrel and the polished internal bore of the selected seal bore receptacle, and a lower latching assemblage movable into latching engagement with the downwardly facing surface provided at the end of the seal bore of the casing receptacle. In two embodiments of the invention, upward movement of the tubing string, followed by a turning movement and a downward movement will effect the releasing of both the upper and lower latching elements to move outwardly into latching engagement with the respective surfaces in the selected casing receptacle.
    Type: Grant
    Filed: August 1, 1983
    Date of Patent: April 2, 1985
    Assignee: Baker Oil Tools, Inc.
    Inventors: Roger A. Weinberg, Mark C. Glaser
  • Patent number: 4503913
    Abstract: A subsurface control fluid pressure actuated well safety valve employs one or more spindles attached to the valve housing and spindle sleeves attached to a shiftable actuating flow tube. The spindles and spindle sleeves are positioned between the valve housing and the flow tube and a change in the pressure force acting on the spindle and on the spindle sleeve will result in relative movement of the spindle sleeve with respect to the spindle to cause the flow tube actuator to shift and open a fluid transmission conduit.
    Type: Grant
    Filed: July 18, 1983
    Date of Patent: March 12, 1985
    Assignee: Baker Oil Tools, Inc.
    Inventor: Michael A. Carmody
  • Patent number: 4501440
    Abstract: A concentric insulating tubular conduit string, including one or more joints with concentric tubular members is disclosed. A concentric walled joint of the type disclosed herein is especially adapted to form a separation joint when incorporated in the tubular string. An insulating conduit incorporating one or more integral separation joints of the type disclosed could be employed for the delivery of a heated fluid, such as steam, through the conduit to the producing formation therebelow. The inner and outer tubular members of the separation joint may be prestressed in tension and compression between axially spaced coupling members used to join the separation joint to the rest of the tubular conduit. A hermetically sealed annular insulating cavity is formed between the inner and outer tubular members. This joint can be separated by merely severing the tensile loaded tubular member and upon severance of this separation joint the conduit extending thereabove can be removed from a subterranean well.
    Type: Grant
    Filed: January 17, 1983
    Date of Patent: February 26, 1985
    Assignee: Baker Oil Tools, Inc.
    Inventors: David M. Anderson, Yung J. Kim
  • Patent number: 4498536
    Abstract: A method of chemical injection and of swabbing and/or flow testing a subterranean well by interconnecting a resettable packer and a circulating wash tool so that the packer may be positioned and set in the casing at a plurality of positions above the casing perforations. The introduction of pressurized chemical solution through the tubular work string produces an injection of the chemical solution into the perforations isolated by the vertically spaced annular sealing elements conventionally provided on the wash tool. Following the chemical treatment, the wash tool can be moved to a position above the perforations and a swab test run to measure the productive capabilities of the treated formation, all with a single trip of the wash tool and associated packer into the well.
    Type: Grant
    Filed: October 3, 1983
    Date of Patent: February 12, 1985
    Assignee: Baker Oil Tools, Inc.
    Inventors: Richard J. Ross, David J. Speller
  • Patent number: 4495073
    Abstract: A mud screen for installation between any two selected ends of interconnected pipes, such as a drill pipe string, comprises a supporting collar anchored in the selected threaded connection of the drill pipe string and a screen support mounted on such collar and secured thereto by one or more releasing devices. An apertured inverted conical screen is supported by the screen support in transverse relationship to the pipe bore. A bridging element is secured across the screen support and defines a mounting for an upstanding post which functions as a manual handle and also defines a fishing neck at its upper end for downhole retrieval.
    Type: Grant
    Filed: October 21, 1983
    Date of Patent: January 22, 1985
    Assignee: Baker Oil Tools, Inc.
    Inventor: Herbert W. Beimgraben
  • Patent number: 4493373
    Abstract: A dynamic seal for use between reciprocal concentric tubular members is disclosed herein and is especially adaptable for use in providing a dynamic seal between a movable piston and a sleeve in a downhole oil or gas well tool, such as a safety valve, a hydraulically actuated packer or a sliding sleeve. Each dynamic seal assembly comprises an elastomeric T-seal with cylindrical backup members positioned on either side of the central tip section of the seal member. The elastomeric T-seal is received within a central annular groove and a seal receptacle and the backup members are positioned within recessed ledges on opposite sides of the central groove. The backup members provide extrusion resistance for the tip section of the dynamic T-seal and overlap the T-seal to hold the seal in place.
    Type: Grant
    Filed: August 15, 1983
    Date of Patent: January 15, 1985
    Assignee: Baker Oil Tools, Inc.
    Inventor: Gerald D. Jackson
  • Patent number: 4485876
    Abstract: A valving apparatus supplies increased fluid pressure to a downhole tool having fluid pressure actuated expandable packing elements. The valving apparatus includes upper and lower annular sealing surfaces and a shuttle valve which, in its normal spring biased position, engages the upper sealing surface and maintains a connection between the bore of the downhole tool and the casing annulus, thereby equalizing pressure therebetween. When pressure in the work string is increased through dropping of a ball on a seat contained in the valving apparatus, the increased fluid pressure is bypassed around the ball valve to impinge upon a piston surface incorporated on the shuttle valve, moving the shuttle valve downwardly into sealing engagement with the lower annular sealing surface and thus transmitting increased pressure to the downhole tool.
    Type: Grant
    Filed: September 26, 1983
    Date of Patent: December 4, 1984
    Assignee: Baker Oil Tools, Inc.
    Inventor: David J. Speller
  • Patent number: 4480371
    Abstract: A concentric insulating tubular conduit member for use in forming a conduit string, such as a tubing string in a subterranean well, is disclosed. Each individual concentric conduit comprises an outer tubing and an outwardly flared inner tubing welded to the outer tubing at the end of the flared section. The inner tubing member is formed from an initially straight cylindrical member having enlarged ends and, when outwardly flared, the flared ends, although stretched, have a thickness at least equal to the nominal thickness of the inner tubular member. Insulation may be contained within the annular cavity between the inner and outer tubing members and between inner and outer coupling members at the juncture between adjacent tubing sections.
    Type: Grant
    Filed: July 13, 1983
    Date of Patent: November 6, 1984
    Assignee: Baker Oil Tools, Inc.
    Inventors: David M. McStravick, David V. Chenoweth
  • Patent number: 4479556
    Abstract: The invention provides a subterranean well casing perforating gun device which employs shaped explosive charges to perforate the well casing. The device generally defines an outer tubular housing assembly concentrically insertable in the well and defining a vertical axis, cylindrical chamber. A tubular carrier of polygonal cross sectional configuration is insertable in the chamber in concentric relationship to the cylindrical wall of the cylindrical chamber. Each of the faces of the carrier have a plurality of spaced passages therethrough, each passage having a configuration substantially corresponding to the configuration of the polygonal face. A shaped charge container has its cylindrical body insertable in any selected one of the passages and a radial flange on the outer end for abutting the polygonal face portion adjacent the respective passage, thereby limiting the insertion of each of the containers into the selected passage.
    Type: Grant
    Filed: October 4, 1982
    Date of Patent: October 30, 1984
    Assignee: Baker Oil Tools, Inc.
    Inventors: Gregg W. Stout, John A. Nelson