Jon Fredrik Hopperstad, Johan Fredrik Synnevaag, Anneli Soppi: Method and apparatus for controlling the acoustic output of an airgun. WesternGeco L L C, Ari Pramudji, Liangang, Jeffery E Griffin, January 22, 2008: US07321527 (13 worldwide citation)

A device including a housing defining a first chamber and a port formed through the housing. A shuttle flange moveably positioned within the first chamber. The shuttle flange moves during a gas-release cycle between i) a closed position blocking the port, and ii) an open position exposing an exit ar ...

David L Malone, Christophe M Rayssiguier, Alexandre G E Kosmala, Michael R Johnson, Joseph P Varkey: Pressurized system for protecting signal transfer capability at a subsurface location. Schlumberger Technology Corporation, Jeffery E Griffin, Brigitte Jeffery Echols, Van Someren P C, April 27, 2004: US06727828 (13 worldwide citation)

A system for protecting the transmission of signals from and/or to a tool in a high pressure environment. The system includes a tool connected to a signal transmission line, such as an electrical cable or optical fiber. The signal transmission line is surrounded by a protective tube that is connecte ...

Diego Narvaez: Technique for facilitating the pumping of fluids by lowering fluid viscosity. Schlumberger Technology Corporation, Jeffery E Griffin, Brigitte L Jeffery, Fletcher Yoder & Van Someren, May 20, 2003: US06564874 (12 worldwide citation)

A viscosity handling system for facilitating the movement of certain fluids. The system utilizes kinetic energy in the form of a rapidly and repetitively moving component that imparts energy in the form of heat to surrounding fluid. The system is particularly useful in applications, such as downhole ...

Laurent E Muller, Larry L Grigar, Steven W Henderson, Klaus B Huber, Bennie C Gill, Rolf Ludolf, Gary L Rytlewski: Apparatus and method for inserting and retrieving a tool string through well surface equipment. Schlumberger Technology Corporation, Jeffery E Griffin, Brigitte Jeffery Echols, Trop Pruder & Hu P C, April 13, 2004: US06719061 (9 worldwide citation)

Well surface equipment is provided to seal around the outer surface of portions of tool sections as the tool sections are assembled or disconnected in a portion of the well surface equipment. The portion of the well surface equipment is isolated from wellhead pressure to enhance well operator contro ...

Alfredo Fayard, Haoming Li, Robert A Parrott: Perforating gun. Schlumberger Technology Corporation, Jeffery E Griffin, Briqitte L Jeffery, Trop Pruner & Hu P C, February 25, 2003: US06523449 (5 worldwide citation)

A technique includes arranging perforating charges of a perforating gun into groups of adjacent perforating charges. Each perforating charge of each group is aligned in a direction associated with the group. The groups are oriented to form a phasing for the perforating gun.

Wenbo Yang, Jason H Mai, Lawrence A Behrmann: Booster. Schlumberger Technology Corporation, Jeffery E Griffin, Brigitte L Jeffery, Trop Pruner & Hu P C, September 23, 2003: US06622630 (4 worldwide citation)

A booster to relay a detonation train from a detonating cord to another booster includes an explosive and a shell. The shell has an open end to receive an end of the detonating cord and an indented closed end that is adapted to form a projectile to strike the other booster when the explosive detonat ...

Stephen M Begg: Deviated borehole drilling assembly. Schlumberger Technology Corporation, Jaime A Castano, Jeffery E Griffin, Brigitte L Jeffrey, July 16, 2002: US06419010 (1 worldwide citation)

An assembly for formation and completion of deviated wellbores is disclosed which includes a toolguide and a casing section which can be used together or separately. The toolguide includes a lower orienting section and a whipstock having a sloping face, commonly known as the directional portion of a ...