FARHAT Z SHAIKH, MD
Marriage and Family Therapists at Loop, Houston, TX

4628495, Dec 9, 1986

Aug 9, 1982

6/406741

James M. Peppers - Houston TX
Farhat A. Shaikh - Houston TX

Dresser Industries, Inc. - Dallas TX

G01V 140

367 85

A measuring and transmitting apparatus for use in a drill string of a well drilling rig has an elongated tubular member functioning as a drill collar in a drill string. This apparatus includes an instrument having transducers that measure lithological and geophysical parameters in the borehole and derive from them data that is encoded into pressure pulsations of the mud flow of the drill string by a modulated signal generator. The modulated signal generator has a valve assembly that selectively restricts the mud flow to introduce the data. The valve is constructed with a movable valve element that is displaced into an orifice located in the mud flow stream. The movable valve element is mounted in a pressure balanced and an area balanced configuration in order that it can be displaced between extended and retracted positions by a valve actuator without regard to the mud pressure either within the drill string or in the borehole annulus around the drill string.

7226303, Jun 5, 2007

Feb 22, 2005

11/062383

Farhat Shaikh - Houston TX, US

Baker Hughes Incorporated - Houston TX

H10R 13/52

439283

An electrical connector for use in downhole environment and methods for use are provided. In one aspect, an electrical connector comprises a substantially cylindrical connector body having a first end and a second end. A groove is formed around an outer surface of the connector body wherein the groove has a first substantially conically beveled surface on a side of the groove proximate the second end. A back-up ring has a second substantially conically beveled surface and is adapted to act cooperatively with an elastomer seal to close an extrusion gap between the connector body and a surrounding surface when the elastomer seal is exposed to a positive differential pressure from the first end to the second end. In another aspect, a conical surface on the connector body is forced to engage a mating surface on a bulkhead, thereby forming a metal to metal seal.

2010009, Apr 22, 2010

Oct 17, 2008

12/288171

Gregory B. Itskovich - Houston TX, US
Alexandre N. Bespalov - Spring TX, US
Farhat A. Shaikh - Houston TX, US
Peter John Nolan - Houston TX, US

G01V 3/20

324367

A logging tool for performing resistivity measurements on the sidewall of a borehole in an earth formation is provided with a circumferential series of evenly-spaced measurement electrodes providing complete circumferential coverage of resistivity measurements. In one embodiment, the measurement electrodes are carried on a conductive pad circumferentially surrounding an elongate mandrel or tubular. The conductive pad is held at a voltage adapted to focus measurement current into the sidewall of the borehole. Preferably, the pad has dimensions relative to the measurement electrodes and a standoff distance between the measurement electrodes and said borehole wall to effectively focus the measurement current into the borehole wall. In accordance with one aspect of the invention, the measurement electrodes are spaced apart by a distance that is less than the width of each measurement electrode, thereby ensuring full circumferential resolution.

2011019, Aug 18, 2011

Jan 28, 2011

13/016797

Farhat A. Shaikh - Houston TX, US

BAKER HUGHES INCORPORATED - Houston TX

E21B 43/00, E21B 33/12, E21B 28/00

166369, 166191, 1661771

A downhole tool having a body, a transducer within the body, and an opening formed through a sidewall of the body. The opening provides a port through which the transducer can communicate from within the body. An elastomeric boot in the body covers the opening and is a barrier that prevents fluid ingress into the downhole tool. An expandable sleeve envelopes the elastomeric boot and provides support that limits bulging of the elastomeric boot from within the body through adjacent openings in the body. An example sleeve is made from elongated members woven into a tubular.

2013018, Jul 25, 2013

Jan 25, 2012

13/358251

Farhat A. Shaikh - Houston TX, US
Marcelo F. Civarolo - The Woodlands TX, US

BAKER HUGHES INCORPORATED - HOUSTON TX

E21B 49/08, E21B 33/12, E21B 27/00

166264, 166 69, 166191

An apparatus for controlling a fluid flow in a borehole may include a tool body that retrieves a fluid sample from a subsurface formation. The tool body has a fluid conduit having an inlet for receiving the fluid sample and an outlet for conveying the fluid sample to a selected location. A mandrel selectively blocks flow across the fluid conduit; and a seal disposed on the mandrel includes at least one chevron seal element that cooperates with the mandrel to selectively block flow across the fluid conduit.

4483394, Nov 20, 1984

Nov 1, 1982

6/438078

James M. Peppers - Houston TX
Farhat A. Shaikh - Houston TX

Dresser Industries, Inc. - Dallas TX

E21B 4712

166113

A hydraulic power unit is provided for a downhole instrument of a measurement while drilling system for a well drilling. The hydraulic power unit is enclosed within a drill collar that is connected in the drill string of a rotary drilling rig. An outer body sleeve is rigidly mounted in the instrument drill collar. A fixed inner sleeve is connected to the outer body sleeve in a concentric relation with a longitudinally movable plunger assembly supported therebetween and movable in the telescopic fashion between an extended position and a retracted position to provide hydraulic power fluid for the hydraulically powered circuits of the instrument.

2012025, Oct 11, 2012

Apr 1, 2012

13/436950

Farhat A. Shaikh - Houston TX, US
James C. Hunziker - New Caney TX, US
Paul G. Junghans - Houston TX, US
Ron Parsley - Kingwood TX, US

Baker Hughes Incorporated - Houston TX

E21B 17/10

166380, 1662411

Roller standoff assemblies and devices facilitate disposal of an interior tubular member within an exterior tubular member. Roller standoff devices include a roller cage and at least one roller supported by the roller cage to contact and roll upon the exterior tubular member.