Patents Examined by Frank S. Tsay
  • Patent number: 7441607
    Abstract: A downhole tool for circulating fluid in a well bore. The tool includes an axial inlet and outlet with radial second outlets. A sleeve moves over the second outlets to control circulation of fluid. The sleeve can be selectively locked in an opened or closed configuration while the tool is in tension or compression. Variation of fluid pressure in the work string and stroking the tool move the sleeve between the operating positions. Cyclic operation of the tool is also described.
    Type: Grant
    Filed: June 30, 2004
    Date of Patent: October 28, 2008
    Assignee: Specialised Petroleum Group Services Limited
    Inventor: George Telfer
  • Patent number: 7422063
    Abstract: Recovery of viscous hydrocarbon by hot fluid injection into subterranean formations is assisted by using a specially designed and under-reamed vertical wellbore with multiple injection perforations separated from the production perforations by a moveable packer. In this oil recovery method the operator drills a typical vertical well, in which a cavity is developed below the pay zone by under-reaming the vertical wellbore to form a collection cavity. This under-reaming can be made up to several feet in diameter using standard reaming technology and tools. Steam is injected into the upper perforations and is prevented from bypassing the cold formation by a vertical hydraulic seal developed in an annular communication zone. Hot oil is produced into the lower perforations and is collected in the reamed out production cavity. A producing mechanism including pumping equipment lifts the produced oil from the central cavity to the surface.
    Type: Grant
    Filed: April 17, 2006
    Date of Patent: September 9, 2008
    Inventor: Henry B Crichlow
  • Patent number: 7416029
    Abstract: A downhole tool which can perform a task in a well bore, such as circulating fluid radially from the tool. The function is selectively performed by virtue of a sleeve moving within a central bore of the tool. Movement of the sleeve is effected by dropping a ball through a ball seat on the sleeve. Movement of the sleeve is controlled by an index sleeve such that the tool can be cycled back to the first operating position by dropping identical balls through the sleeve. Embodiments are described wherein the balls are deformable, the seat is deformable and the seat provides a helical channel through which the ball passes.
    Type: Grant
    Filed: March 31, 2004
    Date of Patent: August 26, 2008
    Assignee: Specialised Petroleum Services Group Limited
    Inventors: George Telfer, Edward Docherty Scott, Rae Andrew Youngor, James Edward Atkins
  • Patent number: 7413019
    Abstract: A bonnet locking apparatus is disclosed. The bonnet locking apparatus includes a segmented radial lock disposed around a bonnet and configured to engage a corresponding radial lock disposed in a body of a blowout preventer, at least one spring configured to bias at least one segment of the segmented radial lock in a locked position, and a backup sleeve disposed around the bonnet, wherein at least a portion of the backup sleeve is configured to secure engagement of the segmented radial lock with the corresponding radial lock disposed in the body of the blowout preventer. A method of locking a bonnet to a blowout preventer is also disclosed.
    Type: Grant
    Filed: March 22, 2006
    Date of Patent: August 19, 2008
    Assignee: Hydril USA Manufacturing LLC
    Inventors: Edward Ryan Hemphill, Michael Wayne Berckenhoff
  • Patent number: 7409987
    Abstract: A device for connection of a wireline (2) provided with a conductor (10), the wireline (2) being intended particularly for a wireline tool (4), wherein the wireline is provided with a wireline connector (6) in which each wireline strand layer (12, 14) is biased and clamped between an inner sleeve (16, 26) and an outer sleeve (18, 28), and wherein the tensile load of the wireline (2) is transmitted to a fastening element (38) via the outer sleeves (18, 28), the wireline connector (6) being connected to the wireline tool (4) by means of a releasable disconnection device (8).
    Type: Grant
    Filed: March 26, 2004
    Date of Patent: August 12, 2008
    Assignee: Smedvig Offshore AS
    Inventor: Ole Gunnar Fjelde
  • Patent number: 7398830
    Abstract: The present invention is directed to an electric-hydraulic power unit. In one illustrative embodiment, the power unit comprises a body having a movable pressure barrier positioned therein, the movable pressure barrier defining first and second chambers therein, a configurable flow path in fluid communication with the first and second chambers, and at least one valve for configuring the flow path in a first state wherein fluid may flow within the flow path only in a direction from the first chamber toward the second chamber, and a second state wherein fluid within the flow path may flow in both directions between the first and second chambers.
    Type: Grant
    Filed: September 19, 2007
    Date of Patent: July 15, 2008
    Assignee: Advanced Micro Devices, Inc.
    Inventors: John A. Johansen, Vidar Sten Halvorsen, Michael R. Williams
  • Patent number: 7392860
    Abstract: An elongated stripper rubber having a converging internal passage extending to a neck portion elastically expanded to snugly receive a drill string. The elongated stripper rubber is adhered to a steel core having a truncated conical load bearing surface containing an annular gasket cavity containing a truncated conical gasket. The volume of elastic material protruding from the truncated conical load bearing surface can be compressed into the gasket cavity between the steel core and a truncated conical annulus in an outer housing.
    Type: Grant
    Filed: March 7, 2006
    Date of Patent: July 1, 2008
    Inventor: Vaughn R. Johnston
  • Patent number: 7392863
    Abstract: The present invention relates to a rock drill bit for percussive drilling. The drill bit comprises a bit body; a head portion defining a longitudinal center axis. The head portion comprises a front face having an outer surface portion, and an inner surface portion disposed radially inside of the outer surface portion. The inner surface portion is partially recessed by a cavity with respect to the outer surface portion. A plurality of fluid channels extends through the head portion and communicates with the cavity for conducting a flushing medium thereto. The inner surface portion comprises a raised portion carrying a plurality of buttons. An imaginary circle intersects centers of the fluid channels and also intersects an equal number of buttons.
    Type: Grant
    Filed: November 10, 2004
    Date of Patent: July 1, 2008
    Assignee: Sandvik Intellectual Property AB
    Inventor: Fredrik Björk
  • Patent number: 7392839
    Abstract: A single fluid line sliding sleeve downhole tool assembly having a top sub engaging a top connector which connects to a body that engages a middle connector which is secured to a port housing, wherein the port housing engages a lower connector and the lower connector engages a bottom sub.
    Type: Grant
    Filed: April 30, 2007
    Date of Patent: July 1, 2008
    Assignee: Petroquip Energy Services, LLP
    Inventors: Charles David Wintill, Rodney Wayne Long, William Ryle Darnell, William John Darnell, Michael Chad Darby
  • Patent number: 7387160
    Abstract: A method and system used for testing a subterranean well. A sensor (34), such as a distributed temperature sensor, comprising a sensing optical fiber (48) connected to an interrogation unit (50), is deployed together with a drill stem test string (20) so that the sensor extends below the packer of the drill stem test string and across at least one formation (22) of the wellbore.
    Type: Grant
    Filed: February 17, 2004
    Date of Patent: June 17, 2008
    Assignee: Schlumberger Technology Corporation
    Inventors: Paul O'Shaughnessy, Christian Koeniger
  • Patent number: 7387169
    Abstract: The present invention provides apparatus and methods for completing a wellbore using expandable tubulars. Particularly, the invention relates to a system of completing a wellbore through the expansion of tubulars. More particularly, embodiments of the present invention relate to the concurrent expansion of a first and second tubular, wherein the first tubular contains a polished bore receptacle configured to sealingly receive a portion of the second tubular thereby providing a sealable connection therebetween.
    Type: Grant
    Filed: December 29, 2006
    Date of Patent: June 17, 2008
    Assignee: Weatherford/Lamb, Inc.
    Inventors: Simon J. Harrall, Robert J. Coon
  • Patent number: 7383898
    Abstract: A downhole motor arrangement for a directional drilling comprises a first motor component (22), a second motor component (24) encircling at least part of the first motor component (22), and a third motor component (26) encircling at least part of the second motor component (24), the first and second motor components (22, 24) having surfaces associated therewith adapted to define isolated cavities, the application of fluid under pressure thereto causing relative rotation between the first and second motor components (22, 24), the second and third motor components (24, 26) having surfaces associated therewith adapted to define isolated cavities, the application of fluid under pressure thereto causing relative rotation between the second and third motor components (24, 26).
    Type: Grant
    Filed: June 23, 2003
    Date of Patent: June 10, 2008
    Assignee: Schlumberger Technology Corporation
    Inventor: Geoff Downton
  • Patent number: 7320370
    Abstract: A downlink system that includes at least one mud pump for pumping drilling fluid from a drilling fluid storage tank to a drilling system, a standpipe in fluid communication with the mud pump and in fluid communication with the drilling system, and a return line in fluid communication with the drilling system for returning the drilling fluid to the drilling fluid storage tank is provided. A drilling fluid modulator may be in fluid communication with at least one of the group consisting of the standpipe and the return line.
    Type: Grant
    Filed: September 17, 2003
    Date of Patent: January 22, 2008
    Assignee: Schlumberger Technology Corporation
    Inventors: Stephane J. Virally, Christopher P. Reed, John A. Thomas, Franck Al Shakarchi, Remi Hutin, Jean-Marc Follini
  • Patent number: 7270189
    Abstract: A top drive assembly for wellsite operations may include a quill, a swivel including a swivel housing and a swivel bearing therein in which the quill is supported, a drive system for applying torque to the quill, and link arm hangers extending from the swivel housing and formed to accept and retain link arms.
    Type: Grant
    Filed: November 9, 2004
    Date of Patent: September 18, 2007
    Assignee: Tesco Corporation
    Inventors: Matthew Brown, William G. Carr
  • Patent number: 7252151
    Abstract: Methods and apparati are disclosed for continuous circulation of drilling fluids while adding or removing tubulars to and from a drill string, and also for continuing drilling during the addition or removal of tubulars to and from the drill string.
    Type: Grant
    Filed: May 21, 2003
    Date of Patent: August 7, 2007
    Assignee: Coupler Developments Limited
    Inventor: Laurence John Ayling
  • Patent number: 7243739
    Abstract: A coiled tubing directional drilling apparatus which is operated by a mud motor and is characterized by a fixed housing and a rotary steerable bent housing or sub which is selectively rotatable with respect to the fixed housing at a fixed angle bend by a shifting mechanism, typically operated by a reversible electric motor. The motor and shifting mechanism rotate with the drive shaft and employ a lead screw in a cross-nut arrangement that selectively engages and disengages a castle lock or power take-off drive system responsive to the direction of rotation of the motor, for effecting 360-degree rotation of the bent housing with respect to the fixed housing. A sun gear and pinion gear planetary gear system facilitate rotation of the bent housing with respect to the fixed housing at a slower speed than the drive train and bit box components of the device.
    Type: Grant
    Filed: March 8, 2005
    Date of Patent: July 17, 2007
    Inventor: Robert E. Rankin, III
  • Patent number: 7231979
    Abstract: A short radius exit from a window milled in casing is possible using a whipstock with a sloping surface in excess of 3.5° and a window mill whose diameter is reduced to a percentage generally below about 95% of the casing inside diameter in a mono-bore or non-through tubing application. The system provides a greater flexibility in choosing the window location and eliminates having to penetrate adjacent formations as compared to previous techniques using a longer exit radius. The decrease in mill diameter, as compared to previous techniques, limits stresses on the milling equipment to minimize equipment failures during window milling and subsequent drilling of the lateral.
    Type: Grant
    Filed: January 12, 2004
    Date of Patent: June 19, 2007
    Assignee: Baker Hughes Incorporated
    Inventors: Dave Stephen, James A. Sonnier, Joseph P. Degeare, Rustom K. Mody, Mohan L. Soni, Daniel R. Hart
  • Patent number: 7228901
    Abstract: The steel drill string attached to a drilling bit during typical rotary drilling operations used to drill oil and gas wells is used for a second purpose as the casing that is cemented in place during typical oil and gas well completions. Methods of operation are described that provide for the efficient installation a cemented steel cased well wherein the drill string and the drill bit are cemented into place during one single drilling pass down into the earth. The normal mud passages or watercourses present in the rotary drill bit are used for the second independent purpose of passing cement into the annulus between the casing and the well while cementing the drill string into place during one single pass into the earth. A one-way cement valve is installed near the drill bit of the drill string that allows the cement to set up efficiently under ambiently hydrostatic conditions while the drill string and drill bit are cemented into place during one single drilling pass into the earth.
    Type: Grant
    Filed: December 1, 2005
    Date of Patent: June 12, 2007
    Assignee: Weatherford/Lamb, Inc.
    Inventors: William Banning Vail, III, James E. Chitwood
  • Patent number: 7225872
    Abstract: A device for perforating a tubing string residing in a well bore includes a tubular housing adapted to pass through the tubing string. At least one perforating body is provided residing in the housing, and has a point adapted to pierce the tubing string. A piston is received within the housing, the piston configured such that pressure applied to a first side of the piston causes the piston to move in a first direction. An actuator body is received within the housing and configured for movement in the first direction with the piston. The actuator body has a sloped wedge surface adapted to wedge the at least one perforating body radially outward to pierce the tubing string with the point when the actuator body is moved in the first direction.
    Type: Grant
    Filed: December 21, 2004
    Date of Patent: June 5, 2007
    Assignee: CDX Gas, LLC
    Inventor: Joseph A. Zupanick
  • Patent number: 7219744
    Abstract: An apparatus for facilitating the connection of tubulars, said apparatus comprising a winch, at least one wire line, and a device for gripping the tubular, the arrangement being such that, in use, the winch can be used to winch said at least one wire and said device to position a tubular below said top drive.
    Type: Grant
    Filed: November 29, 2005
    Date of Patent: May 22, 2007
    Assignee: Weatherford/Lamb, Inc.
    Inventor: Bernd-Georg Pietras