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 ...

Joseph Varkey, Ravicharan Mydur, Noor Sait, Willem Wijnberg, Sumitra Kunathikom, Monica Darpi: Optical fiber cables for wellbore applications. Schlumberger Technology Corporation, David Cate, Michael Flynn, Jaime Castano, January 29, 2008: US07324730 (78 worldwide citation)

A cable which includes conductor bundles prepared from at least one optical fiber positioned either centrally or helically about the center axis of the bundle, metallic conductors helically positioned around the bundles center axis, and a polymeric insulation material. A method of making a cable inc ...

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 ...

Pierre Yves Corre, Gilles Carree: Expandable packer. Schlumberger Technology Corporation, Rodney Warfford, David Cate, Jaime Castano, April 29, 2008: US07363970 (57 worldwide citation)

An integral bodied composite packer is constructed entirely of a composite material. It can include an expandable middle portion with an elastomeric cover to engage an exterior surface of a well bore. The expandable portion can include continuous strands of polymeric fibers to reinforce the body and ...


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.

Joseph Varkey, Anil Singh, Byong Jun Kim, Vladimir Hernandez, Shannon Nimchan, Dan Tabalan: High strength-to-weight-ratio slickline and multiline cables. Schlumberger Technology Corporation, Michael Flynn, David Cate, Jaime Castano, October 13, 2009: US07603011 (39 worldwide citation)

Slickline cables and methods for preparing such cables are disclosed. A slickline cable includes a pre-manufactured polymer composite rod having a channel therein; an optical fiber disposed in the channel; a fastener securing the optical fiber in the channel, wherein the fastener is selected from th ...

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 ...

Joseph Varkey, Garud Sridhar: Enhanced electrical cables. Schlumberger Technology Corporation, David Cate, Michael Flynn, Jaime Castano, July 22, 2008: US07402753 (37 worldwide citation)

Electrical cables formed from at least one insulated conductor, a layer of inner armor wires disposed adjacent the insulated conductor, and a layer of shaped strength members disposed adjacent the outer periphery of the first layer of armor wires. A polymeric material is disposed in interstitial spa ...

Joseph Varkey: Cables with stranded wire strength members. Schlumberger Technology Corporation, David Cate, Jaime Castano, Dale Gaudier, February 5, 2008: US07326854 (34 worldwide citation)

High strength cables formed from strength members. The strength members are formed from bimetallic filament wires which may be encased within a jacket of polymeric material. The bimetallic filament wires wherein the filaments include a high strength core and a corrosion resistant alloy clad forming ...