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Neil A A Simpson, Kevin O Trahan: Apparatus and methods for separating and joining tubulars in a wellbore. Weatherford Lamb, Moser Patterson & Sheridan L, July 29, 2003: US06598678 (116 worldwide citation)

The present invention provides methods and apparatus for cutting tubulars in a wellbore. In one aspect of the invention, a cutting tool having radially disposed rolling element cutters is provided for insertion into a wellbore to a predetermined depth where a tubular therearound will be cut into an ...


32
Jeffrey Bode, Craig Fishbeck, Tom Hill: Flow control apparatus for use in a wellbore. Weatherford Lamb, Moser Patterson & Sheridan L, November 11, 2003: US06644412 (114 worldwide citation)

An apparatus and method of controlling the flow of hydrocarbons into and/or out of a string of tubing disposed in a wellbore. In one embodiment, the apparatus comprises a tubular member having at least one aperture formed in a wall thereof and a sleeve disposed radially outward of the tubular member ...


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Robert Joe Coon: Orienting whipstock seat, and method for seating a whipstock. Weatherford Lamb, Moser Patterson & Sheridan L, July 15, 2003: US06591905 (110 worldwide citation)

The present invention provides an apparatus and methods for seating a whipstock. The apparatus comprises an expandable seat, or nipple, configured to receive a whipstock. The seat is run into a cased wellbore, and is set by expanding it into frictional contact with the inner surface of the casing. T ...


34
Brian H Burrows, Alexander Tam, Ronald Stevens, Kenric T Choi, James D Felsch, Jacob Grayson, Sumedh Acharya, Sandeep Nijhawan, Lori D Washington, Nyi O Myo: Multi-gas straight channel showerhead. Applied Materials, Patterson & Sheridan L, July 12, 2011: US07976631 (107 worldwide citation)

A method and apparatus that may be utilized for chemical vapor deposition and/or hydride vapor phase epitaxial (HVPE) deposition are provided. In one embodiment, a metal organic chemical vapor deposition (MOCVD) process is used to deposit a Group III-nitride film on a plurality of substrates. A Grou ...


35
W John McKeachnie, Michael McKeachnie, Scott Williamson, Rocky A Turley: Wellbore tool with disintegratable components. Weatherford Lamb, Patterson & Sheridan L, September 21, 2010: US07798236 (107 worldwide citation)

The present invention generally provides a pressure isolation plug for managing a wellbore with multiple zones. The pressure isolation plug generally includes a body with a bore extending therethrough, a first disintegratable ball sized and positioned to restrict upward fluid flow through the bore, ...


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Bernd Georg Pietras: Apparatus and method for facilitating the connection of tubulars using a top drive. Weatherford Lamb, Moser Patterson & Sheridan L, April 27, 2004: US06725938 (105 worldwide citation)

An apparatus for facilitating the connection of tubulars using a top drive, the apparatus comprising a supporting member (


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Gregory G Galloway, David J Brunnert: Drilling with concentric strings of casing. Weatherford Lamb, Moser Patterson & Sheridan L, February 22, 2005: US06857487 (102 worldwide citation)

The present invention provides a method and apparatus for setting concentric casing strings within a wellbore in one run-in of a casing working string. In one aspect of the invention, the apparatus comprises a drilling system comprising concentric casing strings, with each casing string having a dri ...


39
Bernd Georg Pietras: Apparatus and method for facilitating the connection of tubulars using a top drive. Weatherford Lamb, Moser Patterson & Sheridan L, September 23, 2003: US06622796 (101 worldwide citation)

An apparatus for facilitating the connection of tubulars using a top drive, the apparatus comprising a supporting member (


40
Patrick J Zimmerman, Rocky A Turley, Rami Al Oudat: Anchoring and sealing system for a downhole tool. Weatherford Lamb, Moser Patterson & Sheridan L, August 3, 2004: US06769491 (100 worldwide citation)

The present invention generally relates to a method and apparatus for sealing an annulus in a wellbore. In one aspect, the apparatus is an anchoring and sealing system for a downhole tool such as a bridge plug, packer, or frac-plug. The sealing system comprises of a sealing member disposed between a ...