Thomas G Shumate

US Patent:

6548452, Apr 15, 2003

Filed:

Jul 9, 2000

Appl. No.:

09/612613

Inventors:

James A. Nattier - Houston TX
Thomas G. Shumate - Spring TX

Assignee:

Halliburton Energy Services, Inc. - Duncan OK

International Classification:

C09K 700

US Classification:

507140, 507906

Abstract:

Drilling fluid additives are designed to increase the density of drilling fluids while minimizing the increase in the resistance to flow of the drilling fluid. In particular, barite particles are added to the drilling fluid as a weight material where the barite particles include at least 85% by weight particles less than 75 microns and greater than 6 microns in equivalent spherical diameter.

US Patent:

50211706, Jun 4, 1991

Filed:

Dec 18, 1987

Appl. No.:

7/135140

Inventors:

Thomas G. Shumate - Spring TX
Louis P. Sokol - Sugar Land TX

Assignee:

Baroid Technology, Inc. - Houston TX

International Classification:

C09K 1706

US Classification:

252 8515

Abstract:

An invert emulsion drilling fluid comprised of a liquid oleaginous medium, water, an emulsifier and a gellant comprised of sulfonated ethylene/propylene/5-phenyl-2-norbornene terpolymer and an organophilic clay.

US Patent:

61805734, Jan 30, 2001

Filed:

Nov 13, 1998

Appl. No.:

9/192120

Inventors:

James A. Nattier - Houston TX
Thomas G. Shumate - Spring TX

Assignee:

Dresser Industries, Inc. - Houston TX

International Classification:

C09K 300
E21B 2100

US Classification:

507269

Abstract:

Drilling fluid additives are designed to increase the density of drilling fluids while minimizing the increase in the resistance to flow of the drilling fluid. In particular, barite particles are added to the drilling fluid as a weight material where the barite particles include at least 85% by weight particles less than 75 microns and greater than 6 microns in equivalent spherical diameter.