Patents Examined by Hoang Dang
  • Patent number: 7967082
    Abstract: A tubular downhole tool string component having a sidewall with a fluid passageway formed therein between a first end and second end, and a valve mechanism disposed within the fluid passageway adapted to substantially cyclically build-up and release pressure within the fluid passageway such that a pressure build-up results in radial expansion of at least a portion of the sidewall and wherein a pressure release results in a radial contraction of the portion of the sidewall. The valve mechanism disposed within the fluid passageway comprises a spring. Radial expansion and contraction of the portion of the sidewall varies a weight loaded to a drill bit disposed at a drilling end of the drill string.
    Type: Grant
    Filed: February 28, 2008
    Date of Patent: June 28, 2011
    Assignee: Schlumberger Technology Corporation
    Inventors: David R. Hall, John Bailey
  • Patent number: 7963337
    Abstract: An offshore composite enhanced metallic drilling riser is equipped to enable preloading of the composite shell and the metallic riser. A riser has steel end connectors and a continuous metallic inner liner, encased in a composite shell. A segmented hyperboloid shaped profile is located near each of the end fittings for preloading of the composite and the metallic riser. In one version, both halves of the hyperboloid shape are capable of axial movement by adjusting jack bolts connected to one of the hyperboloid halves. One of the halves is limited in axial movement while the other half moves axially away from the restricted half, the movement simultaneously generates the composite pre-load and the metallic riser pre-load. The other version uses fluid pressure between mating faces of the segments to push them apart.
    Type: Grant
    Filed: August 7, 2008
    Date of Patent: June 21, 2011
    Assignee: Vetco Gray Inc.
    Inventors: Joseph W. Pallini, Jr., Frank C. Adamek, Karl A. Parfrey
  • Patent number: 7958941
    Abstract: An assembly and method for downhole equipment deployment comprising a liner hanger attachable to deployable equipment, a top sub insertable into the liner hanger and attachable to a tubing string, a lock piston releasably connectable to the top sub, and lock pins insertable through the top sub, the liner hanger, and the lock piston, the liner hanger and associated equipment remotely releasable from the top sub and the lock piston.
    Type: Grant
    Filed: October 21, 2008
    Date of Patent: June 14, 2011
    Assignee: Sturni-Hueston Engineering Ltd.
    Inventors: Kenneth J Hueston, Brian K Klimack, Michael Shoyhetman
  • Patent number: 7958950
    Abstract: A reamer for underground boring is provided. The reamer includes at least: (a) a center mandrel, wherein the center mandrel defines a mandrel axis; (b) a plurality of radial members extending radially from the center mandrel; (c) a plurality of cutting heads, wherein each of the cutting heads: (i) is supported by at least one of the radial members; (ii) is arcuately spaced-apart around the center mandrel from the other cutting heads; (iii) has a rounded surface; and (d) a plurality of cutting teeth on the rounded surface of each of the cutting heads. A method of horizontal drilling with the reamer is also provided.
    Type: Grant
    Filed: April 26, 2010
    Date of Patent: June 14, 2011
    Assignee: Southeast Directional Drilling, LLC
    Inventors: Mark Osadchuk, Steven L. Ugrich
  • Patent number: 7946362
    Abstract: A matrix drill bit and method of manufacturing a matrix bit having back raked cutting elements is disclosed. In one aspect, a matrix drill bit for well drilling includes a matrix bit body that has a front area in a direction of drilling and two or more diamond impregnated cutting blades protruding from the front area of the matrix bit body. The cutting blades each have a front external surface protruding from the front area of the matrix bit body and present a plurality of back raked downhole interface surfaces in the direction of drilling. The downhole interface surfaces span a leading face and a trailing face where the leading face extends to a first height and the trailing face extends to a second height and the first height is greater than the second height.
    Type: Grant
    Filed: March 16, 2007
    Date of Patent: May 24, 2011
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Nuno Da Silva, Valérie Sillen, Nicolas Luyckx
  • Patent number: 7946360
    Abstract: A system for drilling a lateral hole departing from a main well. The system comprises a motor assembly (415) including a motor (412) to generate a rotating torque, an axial thruster (411) to generate an axial force, a blocking system (410) to fix the motor and the axial thruster downhole. The motor assembly further includes a drive shaft (414) to transmit the rotating torque. The system further comprises a first and second connector (402, 404) for transmitting the rotating torque and the axial force from the motor assembly to a drill string assembly. The first connector is connectable to the drill string assembly so as to transmit the axial force only to the drill pipe (401), and to transmit the rotating torque to a further drive (405) shaft positioned within the drill pipe. The second connector (402) is connectable to the drill string assembly so as to transmit both the axial force and the rotating torque to the drill pipe (401).
    Type: Grant
    Filed: January 26, 2005
    Date of Patent: May 24, 2011
    Assignee: Schlumberger Technology Corporation
    Inventors: Jacques Orban, Spyro Kotsonis, Jo Acquaviva
  • Patent number: 7926574
    Abstract: A downhole device used to divert fluid flow out of a work string into an annulus. The downhole device is activated by the movement of a plurality of pistons within the downhole device. Fluid flow through a restriction of the downhole device creates an increase in fluid pressure causing the movement of the pistons. The pistons move a flow tube between various locations within the device. In one location, the flow tube prevents fluid flow to the annulus while in another location the flow tube allows fluid flow to be diverted into the annulus. The downhole device may include a locating sleeve having a continuous j-track allowing the flow tube to be selectively retained at the various locations within the downhole device. Fluid flow through the downhole is used to cycle the device between diverting fluid flow to the annulus and forcing fluid flow down the work string.
    Type: Grant
    Filed: March 3, 2010
    Date of Patent: April 19, 2011
    Assignee: Baker Hughes Incorporated
    Inventors: Maximiliano Mondelli, George Krieg, David Hebert, David Robinson
  • Patent number: 7926569
    Abstract: A bypass device for bypassing a hydraulic piston in a wellbore with an outer tubular body. The outer tubular body can have a fluid control manifold. The fluid control manifold can have two control paths, two high pressure fluid paths, and two valves connecting with two high pressure fluid connecting paths. An inner tubular body can be disposed within the outer tubular body, and a piston chamber can be disposed between the inner tubular body and the outer tubular body. The piston chamber can include two piston chamber sections separated by a hydraulic piston.
    Type: Grant
    Filed: June 23, 2010
    Date of Patent: April 19, 2011
    Assignee: Petroquip Energy Services, LLP
    Inventors: Charles David Wintill, William John Darnell, William Ryle Darnell, Rodney Wayne Long, Todd Ulrich Chretien
  • Patent number: 7918278
    Abstract: An improved method and apparatus for dropping a ball, plug or dart during oil and gas well operations (e.g., cementing operations) employs a specially configured valving member with curved and flat portions that alternatively direct fluid flow through a bore or opening in the valving member via an inner channel or around the periphery of the valving member in an outer channel. In one embodiment, the ball(s), dart(s) or plug(s) are contained in a sliding sleeve that shifts position responsive to valve rotation. An optional indicator indicates to a user or operator that a ball or plug has passed a selected one of the valving members.
    Type: Grant
    Filed: January 6, 2009
    Date of Patent: April 5, 2011
    Assignee: Gulfstream Services, Inc.
    Inventor: Phil Barbee
  • Patent number: 7913769
    Abstract: The application discloses a safety valve including a flapper valve and a packer assembly to be installed in a bore to isolate a first zone from a second zone. Preferably, the safety valve includes a hydraulic conduit bypassing the flapper valve to allow communication therethrough when the valve is closed. Furthermore, the safety valve preferably allows unobstructed passage of tools and fluids therethrough when the flapper valve is open. The application discloses a method to install a safety valve in an existing string of tubing by deploying a packer assembly having an integral safety valve.
    Type: Grant
    Filed: September 20, 2005
    Date of Patent: March 29, 2011
    Assignee: BJ Services Company, U.S.A.
    Inventors: Jeffrey L. Bolding, David Randolph Smith
  • Patent number: 7905293
    Abstract: A hybrid wellhead system is assembled using a plurality of threaded unions, such as spanner nuts or hammer unions, for securing respective tubular heads and a flanged connection for securing a flow control stack to a top of a tubing head spool. The tubing head spool is secured by a threaded union to an intermediate head spool. The intermediate head spool is secured by another threaded union to a wellhead. Each tubular head secures and suspends a tubular string in the well bore. The hybrid wellhead system is capable of withstanding higher fluid pressures than a conventional independent screwed wellhead, while providing a more economical alternative to a flanged, or ranged, wellhead system because it is less expensive to construct and faster to assemble.
    Type: Grant
    Filed: May 14, 2010
    Date of Patent: March 15, 2011
    Assignee: Stinger Wellhead Protection, Inc.
    Inventors: L. Murray Dallas, Bob McGuire
  • Patent number: 7905285
    Abstract: A perforating gun and one or more volume-receiving surge canisters can be actuated at a time delay after perforation for creating a dynamic underbalance condition to aid in directing debris out of the perforations and fractures and into the wellbore. A timer and triggering device actuate one or more canisters in parallel or series after a pre-determined time delay or delays which can be related to wellbore conditions following perforation. Use of propellant-type perforating gun further benefits from favorable propellant burn conditions for forming perforations and followed thereafter by a perforation-cleaning underbalance pressure conditions characterized by one or more of an increased rate of change depression of the pressure in the adjacent annulus, a greater magnitude of pressure depression and a longer duration of underbalance.
    Type: Grant
    Filed: July 15, 2009
    Date of Patent: March 15, 2011
    Assignee: Precision Energy Services, Inc.
    Inventor: David A. Cuthill
  • Patent number: 7900708
    Abstract: Multiple-block downhole anchors and anchor assemblies are provided. A downhole anchor assembly for a tubing string includes an anchor block, a drag block, a biasing arrangement, and a mandrel to be coupled to the tubing string. The anchor block moves, with rotation of the mandrel, between a run position out of contact with a well bore and a set position in contact with the well bore to set the downhole anchor assembly in the well bore. The drag block contacts the well bore at least when the anchor block is out of contact with the well bore. The biasing arrangement biases the anchor block away from the well bore and the drag block toward the well bore. The anchor block is thus protected from the well bore by the drag block, and the biasing arrangement provides for automatic un-setting of the anchor block when torque is removed from the mandrel.
    Type: Grant
    Filed: October 24, 2008
    Date of Patent: March 8, 2011
    Inventor: Marcel Obrejanu
  • Patent number: 7900703
    Abstract: A reaming tool includes a tubular body having a nose portion with a concave center. A plurality of blades defining junk slots therebetween extend axially behind the nose portion and taper outwardly from the exterior of the tubular body. Rotationally leading edges of the blades carry a plurality of cutting elements from the axially leading ends. Selected surfaces and edges of the blades bear tungsten carbide, which may comprise crushed tungsten carbide. The shell of the nose is configured to ensure drillout from the centerline thereof toward the side wall of the tubular body. A method of drilling out a reaming tool is also disclosed.
    Type: Grant
    Filed: November 23, 2009
    Date of Patent: March 8, 2011
    Assignee: Baker Hughes Incorporated
    Inventors: Lester I. Clark, John C. Thomas, Jeffrey B. Lund, Eric E. McClain
  • Patent number: 7900721
    Abstract: In a hard metal plate for insertion in to a seat formed at one end of a drill shaft of a rock drill, comprising a substantially rectangular base shape having two opposed long sides extending in the axial direction of the drill shaft which are at least partially covered by the seat, two opposed, substantially axial free short sides, a radial bottom side facing towards the seat and a cutting face facing away from the seat, both short sides are formed by an axial section having a purely axial direction component and a conical section inclined towards the axial direction, so that at the short side, the substantially rectangular plate tapers towards the bottom side.
    Type: Grant
    Filed: November 3, 2008
    Date of Patent: March 8, 2011
    Assignee: Irwin Industrial Tool Company
    Inventor: Kirpal Singh Sian
  • Patent number: 7896091
    Abstract: A method and apparatus for sealing a wellbore is described herein. A convertible seal includes a sealing element and a valve. The sealing element is in fluid communication with the valve and fluidly blocks a bore of the convertible seal. The sealing element prevents fluid from flowing through the bore until desired. When desired, the sealing element is removed to allow fluid to flow through the bore. Fluid flow in the bore is controlled by the valve. As a result, the convertible seal has been converted to a flow control seal.
    Type: Grant
    Filed: March 27, 2009
    Date of Patent: March 1, 2011
    Assignee: Weatherford/Lamb, Inc.
    Inventors: Scott E. Williamson, John W. McKeachnie
  • Patent number: 7896069
    Abstract: A string of interconnected strain sensors applied to a cylindrical object for monitoring deformation of the object. The string of interconnected strain sensors is applied in a selected zig-zag pattern. A possibility is to drape a pliable support structure around the object, to which the the string of strain sensors has been mechanically coupled in the selected zig-zag pattern.
    Type: Grant
    Filed: August 8, 2007
    Date of Patent: March 1, 2011
    Assignee: Shell Oil Company
    Inventors: Dennis Edward Dria, Frederick Henry Kreisler Rambow, Michelle Yvonne Shuck
  • Patent number: 7896088
    Abstract: An apparatus for deploying an instrument usable with a well comprises at least one reversibly expandable structure, at least one actuator operable to change a perimeter dimension of the at least one reversibly expandable structure, at least one instrument disposed interior of the at least one reversibly expandable structure, and having an axial dimension, and tractoring fluid disposed between the at least one reversibly expandable structure and the at least one instrument. The apparatus is operable to perform at least one of exerting thrust to convey the at least one instrument with respect to at least one adjacent surface, creating compensating pressure between the at least one instrument and the at least one adjacent surface, and sealing between the at least one instrument and the at least one adjacent surface.
    Type: Grant
    Filed: February 20, 2008
    Date of Patent: March 1, 2011
    Assignee: Schlumberger Technology Corporation
    Inventors: Julio C. Guerrero, Hitoshi Tashiro, Bartley Patton, Hubertus V. Thomeer, Robin Mallalieu
  • Patent number: 7891417
    Abstract: Earth formations are characterized by using an array of electrodes which can measure streaming potentials in the formation, and by interpreting the data obtained by the electrodes. The electrodes are placed on a wireline tool, a LWD tool, or in a fixed manner about a completed wellbore. The measured streaming potentials are generated by drilling with an overbearing pressure, slitting the mudcake in a borehole, acid injection, or any of various other manners which causes fluid movement. The data obtained is interpreted to locate fractures, measure formation permeability, estimate formation pressure, monitor drilling fluid loss, detect abnormal pressure, etc. Particularly, a streaming potential voltage transient having a double peak profile signifies the presence of a formation fracture.
    Type: Grant
    Filed: March 9, 2009
    Date of Patent: February 22, 2011
    Assignee: Schlumberger Technology Corporation
    Inventors: Min-Yi Chen, Bhavani Raghuraman, Ian Bryant, Michael G Supp, Jose Navarro
  • Patent number: 7891419
    Abstract: A downhole well cleaning tool adapted for connection between upper and lower sections of an elongate string includes a pump barrel having at least one fluid outlet proximate its upper end. A swab assembly is connected to a pump mandrel for reciprocation within the pump barrel to pump fluids upward to the outlet to draw fluid and debris into the lower string section and trap the debris. A lower portion of the swab mandrel is hollow and open at a lower end thereof with at least one conduit extending through a side wall of the swab mandrel to direct fluid laterally outward from the hollow lower portion against the side wall of the pump barrel during lowering into fluid to reduce debris build-up within the pump barrel. A wear bushing is mounted between the pump mandrel and barrel and a knuckle or swivel joint connects the swab and pump mandrels.
    Type: Grant
    Filed: January 12, 2009
    Date of Patent: February 22, 2011
    Inventor: Daren Shewchuk