Patents Represented by Law Firm Subkow and Kriegel
  • Patent number: 4240683
    Abstract: An adjustable bearing assembly has radial and thrust bearings adjustable on a bearing shaft to eliminate clearance in the bearings and in springs in the bearing assembly. The bearing assembly is shown in combination with an in-hole motor of the fluid driven type. Components driven by the shaft are locked on the shaft by an eccentric surface or a combination of an eccentric and a concentric surface.
    Type: Grant
    Filed: January 12, 1979
    Date of Patent: December 23, 1980
    Assignee: Smith International, Inc.
    Inventor: Gary M. Crase
  • Patent number: 4240932
    Abstract: This invention relates to exchanged mordenite and catalysts employing the same.
    Type: Grant
    Filed: January 18, 1979
    Date of Patent: December 23, 1980
    Assignee: Filtrol Corporation
    Inventors: Hamid Alafandi, Dennis Stamires
  • Patent number: 4234048
    Abstract: A diamond drill bit for drilling bore holes in earth formations having a body connectible to a drilling string, and provided with a matrix portion of hard metals in which diamonds are surface set at the outer gage portion and adjacent to the bit axis, the hard metal matrix having preformed grooves in which preformed diamond impregnated segments are inserted, which are a mixture of diamonds and hard metals, and secured to the matrix portion by brazing material. During bit rotation in the bore hole, the segments cut the major portion of the hole, the diamonds being dispersed throughout the mass of each segment for selective release from the segment as the diamonds become damaged and lost, thereby exposing new diamonds in the segment at a controlled rate, and thereby producing continual resharpening of the segments. As a result, the drilling rate of the bit is increased, as well as the length of hole drilled.
    Type: Grant
    Filed: June 12, 1978
    Date of Patent: November 18, 1980
    Assignee: Christensen, Inc.
    Inventor: David S. Rowley
  • Patent number: 4234043
    Abstract: A subsea test valve system for wells completed at the floor of the sea includes a safety valve and disconnect mechanism mounted in a blowout preventer at the bottom of the sea and having hydraulic fluid pressure operated means for opening the safety valve and controlling a latch in the disconnect mechanism. A tubing test string shut off valve is releasably latched in the disconnect mechanism and has a hydraulic fluid operated shut off valve and a valve for venting the test string to the riser pipe which extends from the blowout preventer to the vessel or platform at the surface of the sea. The subsea hydraulic pressure operated devices are supplied with pressure fluid from a subsea accumulator under the control of subsea pilot valves which are operated by small pressure differences, to accomplish rapid operation at great depth from a control console on the vessel or platform.
    Type: Grant
    Filed: January 17, 1977
    Date of Patent: November 18, 1980
    Assignee: Baker International Corporation
    Inventor: William M. Roberts
  • Patent number: 4232888
    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.
    Type: Grant
    Filed: June 19, 1978
    Date of Patent: November 11, 1980
    Assignee: Baker International Corporation
    Inventor: Amareswar Amancharla
  • Patent number: 4231437
    Abstract: An upper stabilizer and a lower reamer are mounted on an integral or one-piece body adapter to be connected in a tubular drilling string for drilling well bores.
    Type: Grant
    Filed: February 16, 1979
    Date of Patent: November 4, 1980
    Assignee: Christensen, Inc.
    Inventors: Gerald S. Swersky, Keith J. Mason
  • Patent number: 4223920
    Abstract: A manifold unit is connected to a running tool and pipe and run into position in a receptacle on a subsea template or platform to establish a flow path between fluid passages in the receptacle. Fluid supplied through the running pipe forces locking elements into locking engagement with the receptacle and the unit is forced into seating engagement in the receptacle to make a seal between the unit and the flow passages. The unit is retrievable by engaging another pipe in the unit and supplying pressure to release the locking elements.
    Type: Grant
    Filed: November 25, 1977
    Date of Patent: September 23, 1980
    Assignee: Vetco, Inc.
    Inventor: Bernard H. Van Bilderbeek
  • Patent number: 4219945
    Abstract: A shoe embodying a multiple chambered pneumatically inflated insert encapsulated in a yieldable foam which acts as a bridging moderator filling in irregularities of the insert and providing a substantially smooth and contoured surface for supporting the foot in a comfortable manner. The encapsulated insert can be used as an inner sole slipped into an existing shoe, or it can be used as an integral, composite midsole or outsole portion of a shoe.
    Type: Grant
    Filed: June 26, 1978
    Date of Patent: September 2, 1980
    Assignee: Robert C. Bogert
    Inventor: Marion F. Rudy
  • Patent number: 4219087
    Abstract: The method is disclosed for drilling a pilot hole and subsequently enlarging the pilot hole in earth formation. A dual concentric pipe string is used for circulating air downwardly through the outer pipe, through a pilot bit and upwardly through the bore hole outside the pipe string to bail cuttings, during drilling of the pilot hole. The air pressure expands the cutters of an expansible bit while a milited portion of the air supplied cools the cutters. After the cutters are fully expanded, additional air is utilized to clean and cool the cutters. Air is returned through the inner pipe of the dual concentric pipe string. A venturi device is utilized to induce return flow through the inner pipe during enlargement of the hole and to vacuum residue when enlargement is completed. The dual concentric pipe string is made up of lengths of pipe providing threaded, sealed joints.
    Type: Grant
    Filed: January 18, 1979
    Date of Patent: August 26, 1980
    Assignee: Tri State Oil Tool Industries, Inc.
    Inventor: Gary R. Johnson
  • Patent number: 4216827
    Abstract: A double grip well bore packer run into a well casing on a pipe string has actuator means responsive to hydrostatic or applied fluid pressure to set anchor slips and deform a packing into engagement with the casing, and the setting force is locked into the packing. Pressure differential from below the packer actuates hold-down elements into engagement with the casing. A shearable member is sheared by a shear piston which is normally pressure balanced but rendered unbalanced when a releasing tool is seated in the packer and operated so that fluid pressure can act on the shear piston and release the packer for retrieval from the well casing.
    Type: Grant
    Filed: May 18, 1978
    Date of Patent: August 12, 1980
    Inventor: Talmadge L. Crowe
  • Patent number: 4213508
    Abstract: A plurality of valve structures are incorporated in a drill pipe string for drilling a well into the earth utilizing air as the drilling fluid. A first valve is located in the drill pipe string just above the drilling bit, and an additional valve or valves are located in upwardly spaced relation within the drill collar string. Each of the valves has a valve member held in a position allowing the flow of air through the valve by a fusible support, and when the support melts, the valve member will shift to a position closing the valve. The valve just above the bit is combined with a float valve to prevent the upward flow of fluid into the drill string, while the valve or valves spaced upwardly in the drill collar string are full opening valves which allow the running of instruments through the drill string to selected locations above the bit. The additional upwardly spaced valve or valves include a flap held in a position to one side of the bore through the valve body by a fusible retainer.
    Type: Grant
    Filed: October 3, 1977
    Date of Patent: July 22, 1980
    Assignee: Smith International, Inc.
    Inventors: John E. Tschirky, Wayne M. Sullivan
  • Patent number: 4209193
    Abstract: A stab type connector for large diameter pipe has a pin structure and a box structure held in interconnected relation by a locking and loading ring between a circumferential shoulder in the pin structure and a circumferential shoulder on a threaded locking and loading sleeve of the box structure with confronting circumferential pin structure and box structure seating surfaces loaded into engagement. The coengaged and loaded sleeve shoulder and ring and coengaged pin and box structure surfaces transmit axial forces through the connector and resist bending. The connector is useful as a conductor pipe or pile connector.
    Type: Grant
    Filed: May 17, 1977
    Date of Patent: June 24, 1980
    Assignee: Vetco, Inc.
    Inventor: Arthur G. Ahlstone
  • Patent number: 4200159
    Abstract: Tool for drilling bore holes and earth formations in which a bit body matrix, including tungsten carbide, has a plurality of carriers secured thereto, to each of which a cutting element is secured by soldering, after the body matrix has been produced, to avoid subjecting the diamond material embodied in the cutting element to the high temperatures required to produce the matrix body, which would have deleterious effects on the diamond. Each carrier has great rigidity and is provided with a plane surface confronted by the plane back surface of the cutting element to provide a desired narrow solder gap between the cutting element and carrier of uniform width, into which the solder is deposited to adhere the cutting element and carrier together, with the load being transmitted directly from the cutter element to the rigid carrier.
    Type: Grant
    Filed: December 2, 1977
    Date of Patent: April 29, 1980
    Assignee: Christensen, Inc.
    Inventors: Eberhard Peschel, Hermann Rathkamp, Klaus Katzorke, Rainer Jurgens
  • Patent number: 4194582
    Abstract: A telescopic shock absorber for incorporation in a drill string connected to a rotary bit for drilling a bore hole in earth formations, the shock absorber including a single spring assembly which is compressed downwardly when sufficient downwardly directed drilling weight is transmitted from the drill string through the shock absorber to the drill bit, and which is compressed upwardly when the internal drilling fluid pressure in the shock absorber fully overcomes the downwardly directed drilling weight, assuring that the spring assembly is in its compressed condition when the shock absorber is telescoped or extended, enabling it to absorb shocks and vibrations incident to the drilling operation and under both conditions.
    Type: Grant
    Filed: June 28, 1978
    Date of Patent: March 25, 1980
    Assignee: Christensen, Inc.
    Inventor: Alfred Ostertag
  • Patent number: 4190107
    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.
    Type: Grant
    Filed: August 25, 1978
    Date of Patent: February 26, 1980
    Assignee: Baker International Corporation
    Inventors: Jerome H. Oden, Roy E. Swanson, Jr., Ronald J. Vondall
  • Patent number: 4189185
    Abstract: A pilot hole of a preselected diameter is drilled with a suitable bit in an earth formation to a desired depth. The bit is withdrawn from the hole, and an expandable hole opener or underreamer run in the pilot hole with its cutters fully retracted and closely adjacent to each other. When the depth is reached at which enlargement of the pilot hole is to commence to produce a blast chamber, the cutters are forced laterally outwardly by fluid pressure while the hole opener is rotated, without moving the hole opener axially of the pilot hole, to cut the wall of the pilot hole and increase its diameter to the extent determined by maximum expansion of the cutters, thereby forming the upper end of the enlarged blast chamber.
    Type: Grant
    Filed: September 27, 1976
    Date of Patent: February 19, 1980
    Assignee: Tri-State Oil Tool Industries, Inc.
    Inventors: Archer W. Kammerer, Jr., Gary R. Johnson
  • Patent number: 4187920
    Abstract: Method and apparatus are disclosed for drilling a pilot hole and subsequently enlarging the pilot hole in earth formation. A dual concentric pipe string is used for circulating air downwardly through the outer pipe, through a pilot bit and upwardly through the bore hole outside the pipe string to bail cuttings, during drilling of the pilot hole. The air pressure expands the cutters of an expansible bit while a limited portion of the air supplied cools the cutters. After the cutters are fully expanded, additional air is utilized to clean and cool the cutters. Air is returned through the inner pipe of the dual concentric pipe string. A venturi device is utilized to induce return flow through the inner pipe during enlargement of the hole and to vacuum residue when enlargement is completed. The dual concentric pipe string is made up of lengths of pipe providing threaded, sealed joints.
    Type: Grant
    Filed: November 23, 1977
    Date of Patent: February 12, 1980
    Assignee: Tri-State Oil Tool Industries, Inc.
    Inventor: Gary R. Johnson
  • Patent number: 4187906
    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.
    Type: Grant
    Filed: May 8, 1978
    Date of Patent: February 12, 1980
    Assignee: Baker International Corporation
    Inventor: Jozsef P. Kovacs
  • Patent number: 4186727
    Abstract: An air ventilation and washing system for extracting noxious or other impure air, such as is present above the cooking surface of a stove having automatically activated electrical and mechanical fire control apparatus selectively responsive to changes in temperature is disclosed. The air ventilation system has a hood structure providing a make-up air distribution plenum through which air is distributed and pressurized for equal distribution of make-up air along the length of the hood structure. A vortex baffle is provided in the hood between a make-up air cavity and an exhaust cavity to cause efficient mixing of room air and make-up air from the exterior, while protecting personnel from exposure to the exterior make-up air, and a vortex chamber causes the mixing of the make-up air and room air with contaminated air from the stove.
    Type: Grant
    Filed: June 20, 1977
    Date of Patent: February 5, 1980
    Assignee: National Food Service Equipment Fabricators, Inc.
    Inventors: Arnold S. Kaufman, Robert L. Anderson
  • Patent number: 4186569
    Abstract: A drill string shock absorber has a dual spring system for absorbing vibrations and shock loads during rotary well bore drilling operations. A first spring acts in compression when sufficient weight is set down on the drill bit through the shock absorber to overcome the fluid pressure forces tending to extend the shock absorber, and a second spring acts in compression when the weight applied to the bit through the shock absorber does not overcome the fluid pressure forces. A splined connection transmits torque to the shock absorber during drilling operations, and seals are provided between the telescopic shock absorber components for confining therein a body of lubricant, the pressure of which is equalized with the pressure of drilling fluid flowing through the shock absorber.
    Type: Grant
    Filed: February 21, 1978
    Date of Patent: February 5, 1980
    Assignee: Christensen, Inc.
    Inventor: James T. Aumann