Garud B Sridhar

7170007, Jan 30, 2007

Jan 12, 2005

11/033698

Joseph Varkey - Missouri City TX, US
Byong Kim - Sugar Land TX, US
Garud Sridhar - Stafford TX, US
Noor Sait - Shekou-Shenzhen, CN
Wayne Fulin - Sugar Land TX, US

Schlumburger Technology Corp. - Suger Land TX

H01B 7/18

174102R, 174106 R

Wellbore electrical cables according to the invention include at least one insulated conductor, at least one layer of armor wires surrounding the insulated conductor, and a polymeric material disposed in the interstitial spaces formed between armor wires and interstitial spaces formed between the armor wire layer and insulated conductor which may further include wear resistance particles or even short fibers, and the polymeric material may further form a polymeric jacket around an outer, layer of armor wires. The insulated conductor is formed from a plurality of metallic conductors encased in an insulated jacket. The invention also discloses a method of preparing a cable by extruding first layer of polymeric material upon at least one insulated conductor; serving a first layer of armor wires upon the polymeric material; softening the polymeric material to partially embed armor wires; extruding a second layer of polymeric material over the armor wires; serving a second layer outer armor wires thereupon; softening the polymeric material to partially embed the second armor wire layer; and optionally extruding a third layer of polymeric material over the outer armor wires embedded in the second layer of polymeric material. Further disclosed are methods of using the cables of the invention in seismic and wellbore operations, including logging operations.

7259331, Aug 21, 2007

Jan 11, 2006

11/330957

Garud Sridhar - Stafford TX, US
Joseph P. Varkey - Missouri TX, US
Anthony Collins - Houston TX, US

Schlumberger Technology Corp. - Sugar Land TX

H01B 7/18

174102R, 1741261

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 surrounded by a corrosion resistant alloy clad, where the alloy clad includes such alloys as beryllium-copper based alloys, nickel-chromium based alloys, superaustenitic stainless steel alloys, nickel-cobalt based alloys, nickel-molybdenum-chromium based alloys, and the like. The low density core may be based upon titanium or titanium alloys. The cables of the invention may be any useful electric cable design, including monocables, quadcables, heptacables, quadcables, slickline cables, multiline cables, coaxial cables, or seismic cables.

7402753, Jul 22, 2008

Nov 20, 2006

11/561646

Joseph Varkey - Missouri City TX, US
Garud Sridhar - Stafford TX, US

Schlumberger Technology Corporation - Sugar Land TX

H01B 7/18

174102R, 174106 R

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 spaces formed between the inner armor wires and the layer of shaped strength members, and the polymeric material is further disposed in interstitial spaces formed between the inner armor wire layer and insulated conductor. The polymeric material serves as a continuously bonded layer which also separates and encapsulates the armor wires forming the inner armor wire layer wire layer.

7462781, Dec 9, 2008

Apr 12, 2006

11/279518

Joseph P. Varkey - Missouri City TX, US
Garud Sridhar - Stafford TX, US

Schlumberger Technology Corporation - Sugar Land TX

H01B 7/18

174102R, 174106 R, 1741281

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, or even layered around a central axially positioned component or strength member, to form a layer of strength members. Cables of the invention may be of any practical design, including monocables, coaxial cables, quadcables, heptacables, slickline cables, multi-line cables, etc. , and have improved resistant to corrosion, torque balancing, and gas migration from a wellbore to the surface.

7586042, Sep 8, 2009

Jan 12, 2006

11/813755

Joseph Varkey - Sugar Land TX, US
Byong Jun Kim - Sugar Land TX, US
Garud Sridhar - Stafford TX, US
Noor Sait - Islambad, PK
Wayne Fulin - Sugar Land TX, US

Schlumberger Technology Corporation - Sugar Land TX

H01B 7/18

174102R, 174106 R

A method of preparing a cable comprises extruding first layer of polymeric material upon at least one insulated conductor; serving a first layer of armor wires upon the polymeric material; softening the polymeric material to partially embed armor wires; extruding a second layer of polymeric material over the armor wires; serving a second layer outer armor wires thereupon; softening the polymeric material to partially embed the second armor wire layer; and optionally extruding a third layer of polymeric material over the outer armor wires embedded in the second layer of polymeric material.

7700880, Apr 20, 2010

Jul 21, 2008

12/176596

Joseph Varkey - Missouri City TX, US
Garud Sridhar - Stafford TX, US

Schlumberger Technology Corporation - Sugar Land TX

H01B 7/18

174102R, 174106 R

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 spaces formed between the inner armor wires and the layer of shaped strength members, and the polymeric material is further disposed in interstitial spaces formed between the inner armor wire layer and insulated conductor. The polymeric material serves as a continuously bonded layer which also separates and encapsulates the armor wires forming the inner armor wire layer wire layer.

8227697, Jul 24, 2012

Sep 4, 2009

12/554229

Joseph Varkey - Sugar Land TX, US
Byong Jun Kim - Sugar Land TX, US
Garud Sridhar - Stafford TX, US
Noor Sait - Islambad, PK
Wayne Fulin - Sugar Land TX, US

Schlumberger Technology Corporation - Sugar Land TX

H01B 7/00

174102R, 174106 R

Wellbore electrical cables include at least one insulated conductor, at least one layer of armor wires surrounding the insulated conductor, and a polymeric material disposed in the interstitial spaces formed between armor wires and interstitial spaces formed between the armor wire layer and insulated conductor which may further include wear resistance particles or even short fibers, and the polymeric material may further form a polymeric jacket around an outer, layer of armor wires. The insulated conductor is formed from a plurality of metallic conductors encased in an insulated jacket. Further disclosed are methods of using the cables of the invention in seismic and wellbore operations, including logging operations.

8413723, Apr 9, 2013

Oct 16, 2008

12/252553

Joseph Varkey - Sugar Land TX, US
Byong Jun Kim - Los Altos CA, US
Garud Sridhar - Stafford TX, US
Wayne Fulin - Sugar Land TX, US
Noor F. Sait - Atyrau, KZ
Matthew Billingham - Houston TX, US
Andrea Sbordone - Costa Del Sol, SG

Schlumberger Technology Corporation - Sugar Land TX

E21B 19/00

166339, 166352, 166385, 166 771, 174102 R

An embodiment of a method of deploying a cable into a wellbore penetrating a subterranean formation comprises providing a cable, wherein the cable comprises at least one insulated conductor, at least one armor wire layer surrounding the insulated conductor, a polymeric material disposed in interstitial spaces formed between armor wires forming the at least one armor wire layer, and interstitial spaces formed between the at least one armor wire layer and insulated conductor, the polymeric material forming a continuously bonded layer which separates and encapsulates the armor wires forming the at least one armor wire layer, and whereby the polymeric material is extended to form a smooth polymeric jacket around the at least one armor wire layer, introducing the cable into a wellbore and performing at least one operation in the wellbore utilizing the cable.