Theodore J Griffin

US Patent:

6955357, Oct 18, 2005

Filed:

Oct 7, 2002

Appl. No.:

10/265788

Inventors:

Theodore F. Griffin - Houston TX, US
Sean L. Gaudette - Katy TX, US
Anthony P. Foster - Katy TX, US

Assignee:

Cooper Cameron Corporation - Houston TX

International Classification:

E21B033/06

US Classification:

277325, 251 12

Abstract:

A variable bore ram packer including a ram body, a top seal and a packer member designed for use in a standard ram-type blowout preventer used in oil and gas drilling operations is disclosed. The packer member is molded of an elastomeric material having a central semi-elliptical opening with a plurality of packer inserts molded within the elastomeric material in a semi-circular pattern around the central semi-elliptical opening of the elastomeric material. The semi-circular pattern of the packer inserts and the semi-elliptical opening of the elastomeric material share a common axis. The packer member and the plurality of packer inserts are molded into a unitary structure allowing the plurality of packer inserts to move and seat against different diameter tubular members to prevent extrusion of the elastomeric material between the packer inserts and the tubular member.

US Patent:

20020162688, Nov 7, 2002

Filed:

Jun 21, 2002

Appl. No.:

10/176593

Inventors:

Theodore Griffin - Spring TX, US

Assignee:

Core Laboratories Global N.V.

International Classification:

E21B049/00
E21B025/00

US Classification:

175/059000, 175/249000

Abstract:

A core stabilization apparatus and method are implemented. An inner barrel having a plurality of ports disposed circumferentially and axially in a wall thereof is provided. A gas manifold is attached to a first subsets of the ports. Gas is delivered to an interior of the inner barrel via the gas manifold and the corresponding ports. Drilling mud remaining in the interior of the inner barrel is expelled through a second subset of ports. After expulsion of the drilling mud, a stabilizing compound is injected into the interior via an injection manifold attached to the second subset of ports. Upon curing of the stabilizing compound, the inner barrel and core sample contained therein may be sectioned or otherwise manipulated.

US Patent:

62755633, Aug 14, 2001

Filed:

Jan 12, 1999

Appl. No.:

9/228715

Inventors:

Theodore Joseph Griffin - Spring TX

Assignee:

Core Laboratories, I.P., Inc. - Houston TX

International Classification:

G01B 1506

US Classification:

378 58

Abstract:

An apparatus and method for a wellsite. gamma. -ray analysis of core samples is implemented. A wheeled carriage supporting a. gamma. -ray detector stably straddles a core sample, which may be encased in a core barrel. A bracket attached to the carriage may hold a radionuclide source of. gamma. radiation positioned distally from the detector, thereby forming a space therebetween for passage of the core. The density of the core may be determined by counting the. gamma. flux attenuated by the core; by traversing the carriage along a length of the core, the density may be determined as a function of position, and disrupted core or partial recovery detected thereby. Additionally, the natural. gamma. emission of the core may be observed by traversing the apparatus along the core without the radionuclide source.

US Patent:

59441100, Aug 31, 1999

Filed:

Sep 11, 1997

Appl. No.:

8/927194

Inventors:

Gerald D. Watts - Hempstead TX
Theodore F. Griffin - Houston TX

Assignee:

Cooper Cameron Corporation - Houston TX

International Classification:

E21B 3306

US Classification:

166320

Abstract:

A variable bore ram packer designed for use in a standard ram-type blowout preventer used in oil and gas drilling operations is disclosed. The variable bore ram packer includes top and bottom second plates having a central semi-circular opening which is sized to fit closely about the largest diameter pipe the variable bore ram packer will seal against. Anti-extrusion plates having a smaller central arcuate opening sized to fit closely the smallest diameter pipe the variable bore ram packer will seal are attached to the underside of the top plate by guide screws. The guide screws extend through slots in the top plates which control the motion of the guide screws and hence the anti-extrusion plates as the anti-extrusion plates move and seat against different diameter tubular members. A packer member of elastomeric material having a central semi-circular opening sized to fit closely the smallest diameter pipe the variable bore ram packer will seal is molded between the top plate and anti-extrusion plates and lower plate to form a unitary structure. A radially disposed cavity is molded in the packer adjacent the anti-extrusion plates to minimize damage to the packer as it moves radially and seals against different diameter tubular members.