Christopher Harrison, Oliver C Mullins, Olivier Vancauwenberghe, Eric P Donzier, Akihito Chikenji, Anthony Robert Holmes Goodwin, Julian J Pop: Protective barriers for small devices. Schlumberger Technology Corporation, Matthias Abrell, Jaime Castano, Dale Gaudier, March 9, 2010: US07673679 (93 worldwide citation)

Protective barriers for small devices, such as sensors, actuators, flow control devices, among others, protect the devices from erosive and/or corrosive fluids, for example, formation fluids under harsh downhole conditions. The protective barriers include protective coatings and fluid diverting stru ...

Patrick Fisseler, Tom Palmer, James Mather, Colin Longfield, Richard Meehan, Jean Marc Follini, Jean Michel Hache: Apparatus and method for acquiring information while drilling. Schlumberger Technology Corporation, Jennis Salazar, Matthias Abrell, Victor H Segura, October 3, 2006: US07114562 (82 worldwide citation)

An apparatus and method useful for acquiring information from a subsurface formation penetrated by a wellbore contemplate the use of a tubular body adapted for connection within a drill string disposed in the wellbore. The tubular body is equipped with one or more protuberances (e.g., ribs) defining ...

Dinesh R Patel: Downhole dissolvable plug. Schlumberger Technology Corporation, Chadwick Sullivan, Rodney Warfford, Matthias Abrell, October 2, 2012: US08276670 (61 worldwide citation)

A downhole plug can include a housing having an aperture disposed generally through the center of the housing. A stopper can be disposed in the aperture and adapted to block fluid flow therethrough. The stopper can have a composition of at least two different materials. One or more covers can be at ...

Toru Terabayashi, Akihito Chikenji, Tsutomu Yamate, Oliver C Mullins, Andrew L Kurkjian, Hani Elshahawi: Methods and apparatus of downhole fluid analysis. Schlumberger Technology Corporation, Matthias Abrell, Jaime Castano, Dale Gaudier, December 9, 2008: US07461547 (60 worldwide citation)

Methods and apparatus for downhole analysis of formation fluids by isolating the fluids from the formation and/or borehole in a pressure and volume control unit that is integrated with a flowline of a fluid analysis module and determining fluid characteristics of the isolated fluids. Parameters of i ...

Steven G Villareal, Reinhart Ciglenec, Michael J Stucker, Khanh Duong: Formation evaluation while drilling. Schlumberger Technology Corporation, Matthias Abrell, Kevin P McEnaney, Dale V Gaudier, May 6, 2008: US07367394 (45 worldwide citation)

A sampling while drilling tool positionable in a wellbore penetrating a subterranean formation is provided. The tool includes a drill collar, at least one sample chamber, at least one flowline and at least one cover. The drill collar is operatively connectable to a drill string of the sampling while ...

Soon Seong Chee, Remy Parmentier, Xu Wu, Colin Wilson, Juei Igarashi: Optical fiber system and method for wellhole sensing of magnetic permeability using diffraction effect of faraday rotator. Schlumberger Technology Corporation, Matthias Abrell, Jaime Castano, Dale Gaudier, August 19, 2008: US07413011 (40 worldwide citation)

Systems and methods for optically determining casing collar and/or corrosion locations within boreholes, using the diffraction effect of Faraday crystals through which depolarized continuous light is transmitted within optical fibers.

Geoff Downton, Steven James Hart, John David Rowatt: Hybrid rotary steerable system. Schlumberge Technology Corporation, Matthias Abrell, Brigitte L Echols, Dale V Gandier, March 13, 2007: US07188685 (38 worldwide citation)

A bottom hole assembly is rotatably adapted for drilling directional boreholes into an earthen formation. It has an upper stabilizer mounted to a collar, and a rotary steerable system. The rotary steerable system has an upper section connected to the collar, a steering section, and a drill bit arran ...

Stephane Vannuffelen, Akira Kamiya, Masaki Miyashita, Kentaro Indo, Reinhart Ciglenec, Tsutomu Yamate: Method and apparatus for downhole spectral analysis of fluids. Schlumberger Technology Corporation, Matthias Abrell, Jaime Castano, Dale Gaudier, May 27, 2008: US07379180 (38 worldwide citation)

A fluid analysis system for use downhole comprises an input light signal that is directed through a fluid sample housed in a sample cell. The input light signal may originate from a plurality of light sources. An output light signal from the sample cell is then routed to one or more spectrometers fo ...

Tsutomu Yamate, Soon Seong Chee, Stephane Vannuffelen, Colin A Wilson, Juei Igarashi, Khalid Ouaaba, Koichi Naito: High-temperature downhole devices. Schlumberger Technology Corporation, Matthias Abrell, Jody DeStefanis, Jeff Griffin, May 18, 2010: US07720323 (37 worldwide citation)

Subterranean oilfield high-temperature devices configured or designed to facilitate downhole monitoring and high data transmission rates with laser diodes that are configured for operation downhole, within a borehole, at temperatures in excess of 115 degrees centigrade without active cooling.

Lennox Reid, Edward Harrigan, William E Brennan III: Downhole formation testing tool. Schlumberger Technology Corporation, Matthias Abrell, Kevin P McEnaney, William Batzer, March 20, 2007: US07191831 (34 worldwide citation)

Embodiments of the invention relate to a wireline assembly that includes a coring tool for taking coring samples of the formation and a formation testing tool for taking fluid samples from the formation, where the formation testing tool is operatively connected to the coring tool. In some embodiment ...