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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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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 (


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Bernd Georg Pietras: Apparatus and method for aligning tubulars. Weatherford Lamb, Moser Patterson & Sheridan L, March 26, 2002: US06360633 (86 worldwide citation)

An apparatus for aligning a first tubular and a second tubular, in certain aspects, the first tubular extending through a power tong and the second tubular extending through a backup tong, the apparatus including positioning apparatus for guiding the power tong with respect to the backup tong and fo ...


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Bernd Georg Pietras, Thomas F Bailey, Adrian Vuyk Jr, Carl J Wilson: Casing running and drilling system. Weatherford Lamb, Patterson & Sheridan, March 20, 2007: US07191840 (67 worldwide citation)

A method and apparatus for holding and turning a tubular and string of tubulars, such as casing, for make-up and drilling with the tubulars are disclosed. The apparatus generally includes a spear and a clamping head, both of which are mounted to a top drive. The spear and the clamping head can be en ...


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Martin Liess, Jorg Erich Schulze Beckinghausen, Andreas Carlsson, Bernd Georg Pietras: Apparatus and method for positioning a tubular relative to a tong. Weatherford Lamb, Moser Patterson & Sheridan L, November 9, 2004: US06814149 (57 worldwide citation)

An apparatus and a method for positioning a tubular relative to a tong is provided. In one aspect, a positioning tool may be mounted on a lower portion of the tong. The positioning tool includes a positioning member for determining a position of the tubular and a centering member for engaging the tu ...


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Bernd Georg Pietras: Apparatus and method for connecting tubulars using a top drive. Weatherford Lamb, Moser Patterson & Sheridan L, March 16, 2004: US06705405 (56 worldwide citation)

An apparatus for facilitating the connection of tubulars using a top drive, the apparatus comprising a motor for rotating a tool for drivingly engaging a tubular, and a suspension unit for connecting the motor to the top drive, the apparatus being such that, in use, the motor can rotate one tubular ...


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Joerg Erich Schulze Beckinghausen, Bernd Georg Pietras: Apparatus for gripping a pipe. Weatherford Lamb, Guy McClung, March 24, 1998: US05730471 (54 worldwide citation)

An apparatus for gripping a pipe comprises an outer member having at least one inclined inner surface and an inner member having an inclined outer surface, a tubular member having an opening to accommodate said inner member and a threaded part, and a threaded gear engaged with the threaded part of t ...


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Bernd Georg Pietras, Andreas Carlsson, Jorg Erich Schulze Beckinhausen: Wrenching tong. Weatherford Lamb, Patterson & Sheridan, April 18, 2006: US07028585 (48 worldwide citation)

Apparatus for applying torque to a first tubular relative to a second tubular, the apparatus comprising a first tong for gripping the first tubular and a second tong for gripping the second tubular, wherein the first tong is provided with teeth around a peripheral surface thereof, the second tong is ...