1
Ravicharan Mydur, Joseph P Varkey, Sumit Sarkar, Willem A Wijnberg: Electric cable. Schlumberger Technology Corporation, Wayne I Kanak, Brigitte L Jeffery, John J Ryberg, July 29, 2003: US06600108 (67 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 ...


2
Joseph P Varkey, Byong Jun Kim: Methods of manufacturing enhanced electrical cables. Schlumberger Technology, David Cote, Tim Curington, Bill Batzer, March 13, 2007: US07188406 (27 worldwide citation)

Disclosed are methods of manufacturing electrical cables. In one embodiment of the invention, method for manufacturing a wellbore cable includes providing at least one insulated conductor, extruding a first polymeric material layer over the insulated conductor, serving a first layer of armor wires a ...


3
Joseph P Varkey, Garud Sridhar: Electrical cables with stranded wire strength members. Schlumberger Technology Corporation, Michael Flynn, David Cate, Jaime Castano, December 9, 2008: US07462781 (24 worldwide citation)

Disclosed are high strength wellbore electric cables, which are formed from a plurality of strength members. The strength members are formed from several stranded filament wires which may be encased within a jacket of polymeric material. The strength members may be used as a central strength member, ...


4
Joseph P Varkey, Garud Sridhar, Seth Silverman, Rashmi B Bhavsar: Enhanced armor wires for electrical cables. Schlumberger Technology, Dave Cate, Tim Curington, Bill Batzer, October 10, 2006: US07119283 (23 worldwide citation)

Electric cables used with wellbore devices to analyze geologic formations adjacent a wellbore including at least one insulated conductor, and one or more armor wires surrounding the insulated conductor, the armor wires formed of a high strength core surrounded by a corrosion resistant alloy clad. Th ...


5
Joseph P Varkey: Resilient electrical cables. Schlumberger Technology Corporation, David Cate, Jaime Castano, Dale Gaudier, June 26, 2007: US07235743 (19 worldwide citation)

Compression, stretch, and crush resistant cables which are useful for welibores. The cables include insulated conductors, a compression and creep resistant jacket surrounding the insulated conductors, a filler material and compression resistant filler rods placed in interstitial spaces formed betwee ...


6
Joseph P Varkey, Byong Jun Kim, Willem A Wijnberg, Faisal Arif, Anil Singh, Jeffrey Arnaud, John Cuong Nguyen: Electrical cables. Schlumberger Technology Corporation, David Cate, Jaime Castano, Dale Gaudier, October 30, 2007: US07288721 (13 worldwide citation)

Disclosed are durable corrosion resistant wellbore electrical cables including a coated electrical conductor, a polymeric protective layer for trapping coating flakes, a first insulating jacket disposed adjacent to the polymeric protective layer and having a first relative permittivity. A second ins ...


7
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 ...


8
Joseph P Varkey: High temperature electrical cable having interstitial filler. Schlumberger Technology Corporation, David Cate, Wayne Kanak, Robin Nava, March 7, 2006: US07009113 (11 worldwide citation)

A cable includes a central insulated conductor with a plurality of outer insulated conductors disposed around the central conductor. Interstices formed between the central conductor and outer conductors are at least partially filled with a filler material. Filler materials suitable for high temperat ...


9
Joseph P Varkey, Byong J Kim, Willem A Wijnberg, Chun Te Yeh: Electrical cable and method of making same. Schlumberger Technology Corporation, Robin Nava, Brigitte L Echols, February 28, 2006: US07005583 (10 worldwide citation)

An electrical cable includes a first layer, a second layer, and a tie layer, disposed between the first layer and the second layer, for bonding the first layer to the second layer. A method of making an electrical cable includes applying a tie layer to an inner layer, the tie layer being miscible wi ...


10
Garud Sridhar, Joseph P Varkey, Anthony Collins: Lightweight armor wires for electrical cables. Schlumberger Technology, Dave Cate, Jaime Castano, Dale Gaudier, August 21, 2007: US07259331 (9 worldwide citation)

Disclosed are electric cables with improved armor wires used with wellbore devices to analyze geologic formations adjacent a wellbore. The cables include at least one insulated conductor, and one or more armor wires surrounding the insulated conductor. The armor wires include a low density core surr ...