1
Daniel Juhasz, George Boyadjieff, Brian L Eidem, Hans Van Rijzingen: Pipe running tool. Varco I P, Christie Parker & Hale, September 3, 2002: US06443241 (134 worldwide citation)

A pipe running tool for use in an oil drilling system and the like comprises a lower drive shaft adapted to engage a drive shaft of a top drive assembly for rotation therewith. The pipe running tool further includes a lower pipe engagement assembly which is driven to rotate by the lower drive shaft, ...


2
Daniel Juhasz, George Boyadjieff, Brian L Eidem, Hans van Rijzingen: Offset elevator for a pipe running tool and a method of using a pipe running tool. Varco I P, Christie Parker & Hale, October 28, 2003: US06637526 (90 worldwide citation)

A pipe running tool for use in an oil drilling system and the like comprises a lower drive shaft adapted to engage a drive shaft of a top drive assembly for rotation therewith. The pipe running tool further includes a lower pipe engagement assembly which is driven to rotate by the lower drive shaft, ...


3
Daniel Juhasz, George Boyadjieff, Brian L Eidem, Hans Van Rijzingen: Load compensator for a pipe running tool. Varco I P, Christie Parker & Hale, February 17, 2004: US06691801 (80 worldwide citation)

A load compensator is disclosed for use in connection with a pipe running tool. The load compensator includes an outer housing connected to the portion of the pipe running tool that holds the pipe segment. A piston is disposed within the housing, and is connected to a top drive system of the pipe ru ...


4
Daniel Juhasz, George Boyadjieff, Brian L Eidem, Hans van Rijzingen, Herman Kamphorst, Dieter Boettger, Guus van Wechem: Pipe running tool. Varco I P, Christie Parker & Hale, August 29, 2006: US07096977 (51 worldwide citation)

A pipe running tool for use in an oil drilling system and the like comprises a lower drive shaft adapted to engage a drive shaft of a top drive assembly for rotation therewith. The pipe running tool further includes a lower pipe engagement assembly which is driven to rotate by the lower drive shaft, ...


5
John Kracik, Hans van Rijzingen: Make-up control system for tubulars. Varco I P, Christie Parker & Hale, September 5, 2006: US07100698 (46 worldwide citation)

A make-up control method and system for creating a threaded connection between a first tubular and a second tubular are provided. The make-up control system including a top drive connected to the first tubular and a controller operably connected to the top drive that sends at least one command signa ...


6
David Mason, Albert De Pont, Hans Van Rijzingen, Anton Krijnen, Cornelis De Laat: Pipe-gripping structure having load rings. Varco I P, Christie Parker & Hale, January 25, 2005: US06845814 (39 worldwide citation)

A rotary slip for supporting a drill string having a plurality of slip segments connected to define an opening for insertion of the drill string, wherein each slip segment comprises a head region, a toe region, and an inner radial surface axially extending between the head and toe regions, and where ...


7
Daniel Juhasz, George Boyadjieff, Brian L Eidem, Hans van Rijzingen, Herman Kamphorst, Dieter Boettger, Guus van Wechem: Pipe running tool. Varco International, Christie Parker & Hale, September 6, 2005: US06938709 (23 worldwide citation)

A pipe running tool for use in an oil drilling system and the like comprises a lower drive shaft adapted to engage a drive shaft of a top drive assembly for rotation therewith. The pipe running tool further includes a lower pipe engagement assembly which is driven to rotate by the lower drive shaft, ...


8
Daniel Juhasz, George Boyadjieff, Brian L Eidem, Hans van Rijzingen, Herman M Kamphorst, Hans Joachim Dieter Böttger, Gustaaf Louis van Wechem, David Mason: Pipe running tool having wireless telemetry. Varco I P, Christie Parker & Hale, September 22, 2009: US07591304 (17 worldwide citation)

A system for measuring desired drilling parameters of a pipe string during an oil and gas well drilling operation is provided that includes a top drive assembly; a pipe running tool engageable with the pipe string and coupled to the top drive assembly to transmit translational and rotational forces ...


9
Daniel Juhasz, George Boyadjieff, Brian L Eidem, Pamela Eidem legal representative, Hans van Rijzingen, Herman M Kamphorst, Hans Joachim Dietrich Böttger, Gustaaf Louis van Wechem, David Mason, Anton Krijnen: Pipe running tool having a primary load path. Varco I P, Christie Parker & Hale, April 20, 2010: US07699121 (8 worldwide citation)

A system for coupling a pipe segment to a pipe string is provided that includes a top drive assembly having a threaded output shaft; and a pipe running tool threadingly coupled to the threaded output shaft of the top drive assembly such that the primary load of the pipe running tool is supported by ...


10
Daniel Juhasz, George Boyadjieff, Brian L Eidem, Hans van Rijzingen, Herman M Kamphorst, Hans Joachim Dietrich Böttger, Gustaaf Louis van Wechem, David Mason, Ronaldus R M Roling: Pipe running tool having a cement path. Varco I P, Christie Parker & Hale, March 31, 2009: US07510006 (5 worldwide citation)

An oil and gas well drilling system is provided that includes a top drive assembly having an output shaft; and a pipe running tool having a top drive extension shaft connected to the top drive output shaft and engageable with a pipe string to transmit translational and rotational forces from the top ...