Patents Examined by Hoang C. Dang
  • Patent number: 7082997
    Abstract: A crimpable centralizer has been invented for installation on pipe, such as would be useful in well bore drilling and casing operations. The present invention provides a centralizer having a cylindrical body which when coaxially placed over a pipe and substantially radially inwardly displaced at a plurality of points (i.e. crimped) about the circumference of a section of the cylindrical body, attaches to the pipe to create a connection having structurally significant axial and torque load transfer capacity. When crimped according to the methods of the present invention, the load transfer capacity of the connection between the centralizer and the pipe can be arranged to substantially prevent significant relative movement of the centralizer on the pipe under loads that may be encountered when using one or more of the pipes as components of a tubular string used for drilling or completing well bores.
    Type: Grant
    Filed: June 13, 2002
    Date of Patent: August 1, 2006
    Assignee: Tesco Corporation
    Inventor: Maurice William Slack
  • Patent number: 6149350
    Abstract: A method and apparatus for the installation or removal of large multi-ton prefabricated deck packages includes the use of usually two barges defining a base that can support a large multi-ton load. A variable dimensional truss assembly is supported by the barge and forms a load transfer interface between the barge and the deck package. Each boom has a lifting end portion with a roller that fits a receptacle on the package. Tensile connections form attachments between the deck package and barge at a lower elevational position. The variable dimension truss includes at least one member of variable length, in the preferred embodiment being a winch powered cable that can be extended and retracted by winding and unwinding the winch.
    Type: Grant
    Filed: August 21, 1997
    Date of Patent: November 21, 2000
    Inventor: Jon E. Khachaturian
  • Patent number: 6109831
    Abstract: A utility power unit (10) for underground drilling and pipe laying operations comprises a stationary frame portion (12), a movable frame portion (14) capable of performing sliding movement relative to the stationary frame portion (12) and hydraulic cylinders (44) between the stationary and the movable frame portions (12, 14) for effecting the relative movement. The movable frame portion (14) includes an attachment (36) for removably attaching a tool connecting member (38) thereto and a further attachment (40) for removably attaching a rotary drive unit (52) thereto. The invention also provides a method of directional boring along an intended underground path (62) comprising the steps of providing a machine pit (60) at a location along the intended path (62) and drilling a bore along the intended path (62) by means of directional drilling apparatus (10) which includes a stem (30) provided with a drill (68) at a forward end thereof.
    Type: Grant
    Filed: January 10, 1995
    Date of Patent: August 29, 2000
    Assignee: Trenchless Replacement Services Ltd.
    Inventor: Reginald G. Handford
  • Patent number: 6059042
    Abstract: A completions insertion and retrieval under pressure (CIRP) apparatus utilizes a snaplock connector to assemble uphole a tool string of any desired length prior to lowering the tool string into a wellbore for performing wellbore operations in the wellbore. The tool string could comprise a perforating gun string including a plurality of perforating guns interleaved with a corresponding plurality of snaplock connectors. The CIRP apparatus includes a winch housing connected to a lubricator, the lubricator being connected to a valve, the valve being connected to a connection apparatus, such as a deployment BOP or a snaplock operator, the connection apparatus being connected to a work string which extends into the wellbore.
    Type: Grant
    Filed: June 10, 1998
    Date of Patent: May 9, 2000
    Assignee: Schlumberger Technology Corporation
    Inventors: Klaus B. Huber, A. Glen Edwards, Edward G. Smith, Jr., Laurent E. Muller
  • Patent number: 6053250
    Abstract: A gravel pack apparatus and associated method of completing subterranean wells provides convenient and economical gravel packing operations, permitting a sand control screen to be run into the well attached to the apparatus which is, in turn, attached to production tubing, and further permitting the tubing to be detached from the screen. In a preferred embodiment, a gravel pack apparatus has interoperable valve and tubing release portions. The valve portion may be closed after the gravel packing operation is completed. Closure of the valve portion activates the release portion, permitting the apparatus to be separated.
    Type: Grant
    Filed: May 27, 1998
    Date of Patent: April 25, 2000
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Ralph H. Echols
  • Patent number: 6050350
    Abstract: An underground directional drilling steering tool for use with a variety of commercially known drill bits which controls the direction of drill while the drill bit is directly powered by the drill string by way of a drill string coupling. The offset transmitter housing retains the tool in a stable orientation downhole by means of the drill string coupling offset orientation in the housing and stabilizing fins affixed to the exterior of the offset transmitter housing. The positioning of the drill bit in relation to the positioning of the offset transmitter housing in the center of the borehole creates a drilling pathway with a constant curvature away from the wide side of the offset transmitter housing. The direction of this curvature is controlled by means of a jaw clutch, which jaw clutch is engaged by drawing back slightly on the drill string thereby retracting the drive shaft and pulling the drill bit coupling within closer proximity to the offset transmitter housing.
    Type: Grant
    Filed: May 12, 1997
    Date of Patent: April 18, 2000
    Inventors: Waldo Morris, Bruce Heims
  • Patent number: 6039119
    Abstract: A wellhead has, instead of a conventional Christmas tree, a spool tree (34) in which a tubing hanger (54) is landed at a predetermined angular orientation. As the tubing string can be pulled without disturbing the tree, many advantages follow, including access to the production casing hanger (21) for monitoring production casing annulus pressure, and the introduction of larger tools into the well hole without breaching the integrity of the well.
    Type: Grant
    Filed: July 12, 1996
    Date of Patent: March 21, 2000
    Assignee: Cooper Cameron Corporation
    Inventors: Hans Paul Hopper, Thomas G. Cassity
  • Patent number: 6032743
    Abstract: Methods and apparatus are disclosed for reducing lifting costs in a producing hydrocarbon well by injecting produced water into a set of injection perforations located lower in the well borehole from a set of production perforations. A plunger pump and a cage-ball valve system are placed above a production packer which is located between the production and injection perforations. The valve system and pump are arranged to take produced water from above the packer and pump into the injection perforations only on the downstroke of the rod string activated plunger pump.
    Type: Grant
    Filed: January 2, 1996
    Date of Patent: March 7, 2000
    Assignee: Texaco Inc.
    Inventors: Kevin Rush Bowlin, Howard Lee McKinzie, Carlos Walter Pardo
  • Patent number: 6032735
    Abstract: A gravel pack apparatus and associated method of completing subterranean wells provides convenient and economical gravel packing operations, permitting a sand control screen to be run into the well attached to the apparatus which is, in turn, attached to production tubing, and further permitting the tubing to be detached from the screen. In a preferred embodiment, a gravel pack apparatus has interoperable valve and tubing release portions. The valve portion may be closed after the gravel packing operation is completed. Closure of the valve portion activates the release portion, permitting the apparatus to be separated.
    Type: Grant
    Filed: March 27, 1998
    Date of Patent: March 7, 2000
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Ralph H. Echols
  • Patent number: 6027175
    Abstract: A method of highwall mining, the method includes providing a continuous miner (11) connected to a car train (12) extending to a launch vehicle (13). As the miner (11) progresses down an inclined mine tunnel (15) additional cars are added to the train (12) at the launch vehicle (13). The launch (13) applies a force to the end car so that the car adjacent the mine (11) provides a reaction force for the miner (11).
    Type: Grant
    Filed: November 29, 1996
    Date of Patent: February 22, 2000
    Assignee: Cutting Edge Technology Pty Ltd.
    Inventors: Peter Kenneth Seear, Bret Edward Leisemann
  • Patent number: 6006839
    Abstract: A guide system for injecting continuous conduit or tubing into a well under pressure including a closed pressurized chamber for equalizing the interior and exterior pressure on the conduit in the area where the conduit is under maximum stress due to bending or flexing. The chamber may be installed on a standard wellhead or injection head. Low friction guide sleeves are provided as a bearing surface for the conduit in the pressurized chamber.
    Type: Grant
    Filed: October 2, 1996
    Date of Patent: December 28, 1999
    Assignee: Stewart & Stevenson, Inc.
    Inventors: Michael Patrick Dearing, Michael Lee Smith
  • Patent number: 6003606
    Abstract: A method and apparatus for propelling a tool having a body within a passage. The tool includes a gripper including at least a gripper portion which can assume a first position that engages an inner surface of the passage and limits relative movement of the gripper portion relative to the inner surface. The gripper portion can also assume a second position that permits substantially free relative movement between the gripper portion and the inner surface of the passage. The tool includes a propulsion assembly for selectively continuously moving the body of the tool with respect to the gripper portion while the gripper portion is in the first position. This allows the tool to move different types of equipment within the passage. For example, the tool advantageously may be used in drilling processes to provide continuous force to a drill bit. This enables the drilling of extended horizontal boreholes.
    Type: Grant
    Filed: August 9, 1996
    Date of Patent: December 21, 1999
    Assignee: Western Well Tool, Inc.
    Inventors: Norman Bruce Moore, Ronald E. Beaufort, Rudolph E. Krueger
  • Patent number: 6000481
    Abstract: A sampling device capable of collecting fluid and soil samples includes a sensor for measuring a fluid parameter. The sensor is coupled to a monitor which records the fluid parameter measurements. A regenerative gas is passed through the sensor to regenerate the sensor so that a number of measurements may be taken. A movable drive tip covers an opening through which the fluid sample is collected.
    Type: Grant
    Filed: May 13, 1996
    Date of Patent: December 14, 1999
    Assignee: Simulprobe Technologies, Inc.
    Inventors: Noah Heller, Jeffrey Gamble
  • Patent number: 5996715
    Abstract: A rotary roof mine bit for drilling holes in the roof of a mine, comprises a bit body and an insert mounted in the bit body. The insert is formed of a hard material such as carbide or diamond. A top surface of the insert comprises two top sections which intersect a respective main surface of the insert to define first and second non-linear cutting edge. In one embodiment each cutting edge comprises a plurality of mutually angled segments. In another embodiment each cutting edge is continuously curved. Preferably an axial notch is disposed at a center of the top surface.
    Type: Grant
    Filed: November 2, 1998
    Date of Patent: December 7, 1999
    Assignee: Sandvik Rock Tools, Inc.
    Inventors: Kent Peay, David Alexander McCloskey, Jan Magnus Andersson
  • Patent number: 5996687
    Abstract: A variable flow control device having a substantially cylindrical housing with a valve element connected to an inner surface thereof. The valve is movable between an open position and a closed position in the bore. One or more flow control orifices are located in the valve element for controlling the flow of fluids through the housing when the valve element is in the closed position. A drive mechanism is also connected to the valve element for controlling the size of the one or more flow control orifices. As such, a full bore variable flow control device is provided that controls the flow of wellbore fluids without permanent reduction of the internal bore of the production tubing. By closing the flapper valve and selecting the size of the variable orifices, total control of the production flow of the wellbore can be achieved. By opening the flapper valve, full bore wireline operations to the bottom of the well can be performed.
    Type: Grant
    Filed: June 19, 1998
    Date of Patent: December 7, 1999
    Assignee: Camco International, Inc.
    Inventors: Ronald E. Pringle, Arthur J. Morris
  • Patent number: 5992516
    Abstract: A well string injector has a frame, with a guide at one end for guiding well string along the frame and a support at the other end for directing the well string towards a target. At least one of a pair of longitudinally spaced clamps is movable with respect to the other and at least one clamp is oriented on the frame to provide clamping forces on well string by relative movement between clamping members, each carrying a well string gripping die, predominantly in a transverse direction perpendicular to the frame longitudinal direction. A third well string gripping die may be carried by the clamp for location between parallel spaced well string clamped by the clamp. A well string gripping die is provided that includes a gripping surface that induces an optimized stress distribution in well string clamped by the gripping die when the well string is in tension. A well string gripping die is provided that includes one and preferably a pair of barrier walls for preventing walk out of well string.
    Type: Grant
    Filed: July 8, 1997
    Date of Patent: November 30, 1999
    Assignee: 707746 Alberta Ltd.
    Inventors: Alexander Palynchuk, Alan Palynchuk, Mark Palynchuk
  • Patent number: 5988282
    Abstract: A horizontal tree having a vertical bore and a horizontal production passage is landed in a wellhead housing. A tubing hanger lands in the bore and has a vertical passage and a horizontal passage that aligns with that of the tree. A retrievable first plug seals the vertical passage. A tree cap seals in the tree bore above the tubing hanger and has an axial passage. A retrievable second plug having a valve seals the tree cap passage. A vent port extends laterally through the tree cap between its axial passage and outer surface. A pair of seals on the second plug seal above and below the vent port. A tubing annulus passage communicates with the vent port and an annulus passage. The second plug serves as a second pressure barrier to the first plug and blocks the vent port when the valve is closed. The annulus passage is sealed from communication with a void between the plugs. The valve may be opened to release pressure in the void by applying pressure to an upper end of the check valve.
    Type: Grant
    Filed: December 22, 1997
    Date of Patent: November 23, 1999
    Assignee: ABB Vetco Gray Inc.
    Inventors: Charles Jennings, Glen H. Cuiper
  • Patent number: RE36525
    Abstract: A coiled tubing completion system is provided with a plurality of completion apparatus, all of which is designed flush with the diameter of the coiled tubing outside diameter for avoiding upsets and are flexible, spoolable on a coiled tubing reel and having through bores large enough to pass wireline tools for performing other operations. The spoolable coiled tubing system may use standard coiled tubing well control equipment and can be used in live wells. The flush, flexible, spoolable and through bore completion equipment may include a tubing retrievable safety valve, an annular control valve, concentric gas lift valves, a zone packer, a landing nipple, a sliding sleeve, and may include at the end a non-flexible but flush and open bore production packer and pump out plug. The completion system may be retrieved through a retrieval system.
    Type: Grant
    Filed: May 2, 1997
    Date of Patent: January 25, 2000
    Assignee: Camco International Inc.
    Inventor: Ronald E. Pringle
  • Patent number: RE36723
    Abstract: A coiled tubing completion system is provided with a plurality of completion apparatus, all of which is designed flush with the diameter of the coiled tubing outside diameter for avoiding upsets and are flexible, spoolable on a coiled tubing reel and having through bores large enough to pass wireline tools for performing other operations. The spoolable coiled tubing system may use standard coiled tubing well control equipment and can be used in live wells. The flush, flexible, spoolable and through bore completion equipment may include a tubing retrievable safety valve, an annular control valve, concentric gas lift valves, a zone packer, a landing nipple, a sliding sleeve, and may include at the end a non-flexible but flush and open bore production packer and pump out plug. The completion system may be retrieved through a retrieval system.
    Type: Grant
    Filed: May 2, 1997
    Date of Patent: June 6, 2000
    Assignee: Camco International Inc.
    Inventors: Brian Keith Moore, Ronald E. Pringle
  • Patent number: RE36880
    Abstract: A coiled tubing completion system is provided with a plurality of completion apparatus, all of which is designed flush with the diameter of the coiled tubing outside diameter for avoiding upsets and are flexible, spoolable on a coiled tubing reel and having through bores large enough to pass wireline tools for performing other operations. The spoolable coiled tubing system may use standard coiled tubing well control equipment and can be used in live wells. The flush, flexible, spoolable and through bore completion equipment may include a tubing retrievable safety valve, an annular control valve, concentric gas lift valves, a zone packer, a landing nipple, a sliding sleeve, and may include at the end a non-flexible but flush and open bore production packer and pump out plug. The completion system may be retrieved through a retrieval system.
    Type: Grant
    Filed: June 13, 1997
    Date of Patent: September 26, 2000
    Assignee: Camco International Inc.
    Inventor: Ronald E. Pringle