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Malone David L, Rayssiguier Christophe M, Kosmala Alexandre G E, Johnson Michael R, Varkey Joseph P: Pressurised system for protecting signal transfer capability. Schlumberger Holdings, March 20, 2002: GB2366817-A (15 worldwide citation)

To prevent damage to signal transmission lines 30, such as electric cable or optical fibres, they are incased by flexible, rigid, or semi-rigid tubing 34, that extends from the surface down to a connector 38 and a tool 26, such as a packer, flow metre or control valve. The tube 34 and connector 38 a ...


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Varkey Joseph: Ruggedized hybrid cables for wellbore. Schlumberger Canada, Services Petroliers Schlumberger, Schlumberger Holdings, Schlumberger Technology, Varkey Joseph, CATE David, December 14, 2006: WO/2006/131871 (8 worldwide citation)

Disclosed are wellbore electric cable components, methods of manufacturing such components, and cables incorporating the components. Particularly, ruggedized optical fibers useful for forming slickline electric cables are described. The ruggedized optical fiber components contain one or more coated ...


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Varkey Joseph, Mydur Ravicharan, Sait Noor, Wijnberg Willem, Kunathikom Sumitra, Darpi Monica: Optical fiber cables for wellbore applications. Schlumberger Canada, Prad Research And Development, Schlumberger Surenco, Schlumberger Technology, Services Petroliers Schlumberger, Schlumberger Overseas, Schlumberger Services, Schlumberger Holdings, Schlumberger Seaco, Schlumberger Oilfield Assistance, Varkey Joseph, Mydur Ravicharan, Sait Noor, Wijnberg Willem, Kunathikom Sumitra, Darpi Monica, CATE David, December 1, 2005: WO/2005/114285 (6 worldwide citation)

A cable which includes conductor bundles (500) prepared from at least one optical fiber (504) positioned either centrally or helically about the center axis of the bundle, metallic conductors (502) helically positioned around the bundles center axis, and a polymeric insulation material (512). A meth ...


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Mydur Ravicharan, Varkey Joseph P, Sarkar Sumit, Wijnberg Willem A: Electrical cable and method. Service Petroliers Schlumberge, Schlumberger Holdings, July 30, 2003: EP1331648-A2 (5 worldwide citation)

A cable includes an electrical conductor, a first insulating jacket disposed adjacent the electrical conductor and having a first relative permittivity, and a second insulating jacket disposed adjacent the first insulating jacket and having a second relative permittivity that is less than the first ...


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Darpi Monica M, Varkey Joseph P, Orlet Michael W: Dual stress member conductive cable. Schlumberger Services Petrol, March 31, 2004: EP1403883-A2 (4 worldwide citation)

A dual stress member electrical cable includes an electrically conductive, load-bearing core, an insulating layer surrounding the core, and an electrically conductive, outer load-bearing member surrounding the insulating layer. The core may be formed of a solid wire of steel, aluminum, or titanium. ...


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VARKEY JOSEPH: Permanent cable for submersible pumps in oil well applications. Schlumberger Canada, Mcgoff Kevin B, September 1, 2011: WO/2011/106513 (3 worldwide citation)

A technique facilitates the employment of an electric submersible pumping system or other well system downhole into a wellbore. The electric motor system is coupled with a signal carrying cable for conveyance to a desired downhole location in the wellbore. The signal carrying cable is constructed wi ...


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Varkey Joseph, Hernandez Solis Vladimir, Simanjuntak Surya, Tabalan Dan, Kim Byong Jun: Bend insensitive opto-electrical cables with improved fatigue life. Schlumberger Canada, Services Petroliers Schlumberger, Schlumberger Holdings, Schlumberger Technology, Prad Research And Development, Varkey Joseph, Hernandez Solis Vladimir, Simanjuntak Surya, Tabalan Dan, Kim Byong Jun, CATE David, November 6, 2008: WO/2008/132637 (3 worldwide citation)

A hybrid opto-electrical cable assembly for oilfield wireline or seismic exploration applications includes an optical fiber element and an electrical conductor. The optical fiber element includes an optical fiber and a carbon layer surrounding the optical fiber. The optical fiber can have a high Num ...


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Varkey Joseph P, Sait Noor: Partial discharge resistant electrical cable and method. Schlumberger Services Petrol, Schlumberger Holdings, September 24, 2003: EP1347465-A2 (2 worldwide citation)

An electrical cable includes a conductor comprising a plurality of strands defining interstices therebetween and a first insulating layer comprising a polymer that is disposed on the conductor such that the first insulating layer substantially fills the interstices. Alternatively, an electrical cabl ...


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SCHULER Barry Lee, VARKEY Joseph, MORRISON Montie W: D├ęploiement dune pompe de fond de trou au moyen de c├óble, Deployment of downhole pump using a cable. Schlumberger Canada, Services Petroliers Schlumberger, Schlumberger Holdings, Schlumberger Technology, Prad Research And Development, Schlumberger Technology Corporation, SCHULER Barry Lee, VARKEY Joseph, MORRISON Montie W, CLARK Brandon S, December 1, 2011: WO/2011/150213 (2 worldwide citation)

Embodiments disclosed herein relate to a method and a system to deploy a downhole pump within a well. The system includes the downhole pump disposed in a well, the downhole pump having a motor, and a cable having at least one strength member layer bonded to a cable core, in which a first end is conn ...


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