David Glen Dearing

US Patent:

6691788, Feb 17, 2004

Filed:

Jul 25, 2002

Appl. No.:

10/202694

Inventors:

David G. Dearing - Carrollton TX

Assignee:

Halliburton Energy Services, Inc. - Dallas TX

International Classification:

E21B 2301

US Classification:

166382, 166387, 166119, 166134, 166217, 166138, 166196, 166137, 1663341

Abstract:

A retrievable packer ( ) for establishing a sealing and gripping engagement between a tubing string and a well casing ( ) disposed in a wellbore is disclosed. The retrievable packer ( ) comprises a collet member ( ) that is slidably disposed about a packer mandrel ( ). The collet member ( ) has a first operating position wherein the collet member ( ) applies an axial force on a support ring ( ) to positively position the support ring ( ) at least partially between a first slip wedge ( ) and the packer mandrel ( ) to set a seal assembly ( ). In addition, the collet member ( ) has a second operating position wherein the collet member ( ) applies an axial force on a slip assembly ( ) to set the slip assembly ( ).

US Patent:

7694745, Apr 13, 2010

Filed:

Sep 16, 2005

Appl. No.:

11/228932

Inventors:

Ronald W. McGregor - Carrollton TX, US
David G. Dearing - Lewisville TX, US

Assignee:

Halliburton Energy Services, Inc. - Houston TX

International Classification:

E21B 33/129

US Classification:

166387, 166240, 166123

Abstract:

A well tool is adapted to couple to at least one of a wireline service tool and a tubing string and has an adapter component engaging portion adapted to couple to an adapter component. At least a first and a second interchangeable adapter components are operable to couple to the adapter component engaging portion. The first adapter component is adapted to perform a first function and the second adapter component is adapted to perform a second function.

US Patent:

7950469, May 31, 2011

Filed:

Mar 16, 2010

Appl. No.:

12/725190

Inventors:

Ronald W. McGregor - Carrollton TX, US
David G. Dearing - Lewisville TX, US

Assignee:

Halliburton Energy Services, Inc. - Houston TX

International Classification:

E21B 33/129

US Classification:

166387, 166240, 166123

Abstract:

A well tool is adapted to couple to at least one of a wireline service tool and a tubing string and has an adapter component engaging portion adapted to couple to an adapter component. At least a first and a second interchangeable adapter components are operable to couple to the adapter component engaging portion. The first adapter component is adapted to perform a first function and the second adapter component is adapted to perform a second function.

US Patent:

48383481, Jun 13, 1989

Filed:

Jan 28, 1988

Appl. No.:

7/149639

Inventors:

David G. Dearing - Duncanville TX

Assignee:

Dresser Industries, Inc. - Dallas TX

International Classification:

E21B 2306

US Classification:

166136

Abstract:

A well packer brake mechanism includes opposed rings releasably holding brake members in an inward brake released position. The rings are movable away from one another for allowing outward movement of the brake members to their operating position under influence of biasing springs.

US Patent:

45835900, Apr 22, 1986

Filed:

Feb 21, 1985

Appl. No.:

6/703797

Inventors:

Donald R. Greenlee - Cedar Hill TX
David G. Dearing - Duncanville TX
Andrew J. Tucker - Tulsa OK

Assignee:

Dresser Industries, Inc. - Dallas TX

International Classification:

E21B 2300

US Classification:

166216

Abstract:

The slip releasing apparatus described herein includes a unitary slip member having wall engaging teeth located in diagonally opposite upper and lower ends and carries a pair of releasing pins mounted therein that project inwardly therefrom. The pins are disposed in recesses or holes formed in a slip carrier member that extends through the slip member. The recesses are configured in the carrier member so that an upward pull on the carrier member moves a release surface onto the carrier member into engagement with the pins in the slip member to cause pivotal or rotational movement of the slip member about a fulcrum formed by the engagement between the teeth on the lower end of this slip member and the pipe in which the slip member is run.