David G Watkins

US Patent:

49752081, Dec 4, 1990

Filed:

Feb 28, 1990

Appl. No.:

7/486974

Inventors:

David R. Watkins - Irvine CA

Assignee:

Union Oil Company of California - Los Angeles CA

International Classification:

E21B 4322
E21B 4324
E21B 33128

US Classification:

252 8554

Abstract:

A composition for use in enhanced oil recovery procedures comprises steam having a vapor phase and a liquid phase and a fluorocarbon surfactant partitioned between the liquid and vapor phases. The partitioning of the fluorocarbon surfactant between the two phases is accomplished by maintaining the composition's pH at less than about 11, and preferably within the range of 7 to about 11. By varying the fluorocarbon surfactant concentration, the composition can be used as a surface tension depressant well stimulation additive and/or as a foam former for selectively blocking more permeable portions of a formation.

US Patent:

45806330, Apr 8, 1986

Filed:

Dec 21, 1983

Appl. No.:

6/564237

Inventors:

David R. Watkins - Irvine CA
Leonard J. Kalfayan - Pasadena CA

Assignee:

Union Oil Company of California - Los Angeles CA

International Classification:

E21B 4322
E21B 4324
E02D 312
C09K 1700

US Classification:

166295

Abstract:

Method for treating a formation, particularly one containing finely divided particulate material, to increase the flow of fluids through the formation wherein there is injected therein an organosilicon compound, preferably in a hydrocarbon carrier liquid, followed by injection of steam containing a compound which contains ammoniacal nitrogen, selected from the group consisting of ammonium hydroxide, ammonium salts of inorganic acids, ammonium salts of carboxylic acids, quaternary ammonium halides, amine or substituted amine hydrochlorides, derivatives of ammonium cyanate, and water-soluble ammonia or ammonium ion precursors selected from the group consisting of amides of carbamic acid and thiocarbamic acid, derivatives of such amides, tertiary carboxylic acid amides and their substituted and alkylated derivatives. A preferred nitrogen-containing compound is urea.

US Patent:

50511971, Sep 24, 1991

Filed:

Oct 10, 1990

Appl. No.:

7/595104

Inventors:

Leonard J. Kalfayan - Claremont CA
David R. Watkins - Irvine CA
Gregory S. Hewgill - Chino CA

Assignee:

Union Oil Company of California - Los Angeles CA

International Classification:

252
252
252
252

US Classification:

252 8552

Abstract:

An aqueous composition comprises an aminopolycarboxylic acid and a water-soluble organosilicon compound. The composition is useful for removing scale from well equipment and/or openings in a subterreanean formation, and for stabilizing fine particles within the formation to prevent their subsequent movement. Fluid flow through formations and wells treated with the composition tends to be increased and more stable.

US Patent:

47082070, Nov 24, 1987

Filed:

Nov 21, 1985

Appl. No.:

6/800532

Inventors:

Leonard J. Kalfayan - Claremont CA
David R. Watkins - Irvine CA
Gregory S. Hewgill - Chino CA

Assignee:

Union Oil Company of California - Los Angeles CA

International Classification:

E21B 3706

US Classification:

166295

Abstract:

A method for treating a subterranean formation, or a well penetrating the formation, comprises injecting into the well an aqueous composition containing an aminopolycarboxylic acid and water-soluble organosilicon compound. By use of the method, scale is removed from well equipment and/or openings in the formation, and fine particles within the formation are stabilized to prevent their subsequent movement, resulting in increased, more stable fluid flow through the formation and well.

US Patent:

46142363, Sep 30, 1986

Filed:

May 29, 1984

Appl. No.:

6/614976

Inventors:

David R. Watkins - Irvine CA
Edward J. O'Donnell - Huntington Beach CA

Assignee:

Union Oil Company of California - Los Angeles CA

International Classification:

B08B 308
E21B 2114

US Classification:

166304

Abstract:

A self-breaking, foamed, oil-in-water emulsion contains a water-immiscible organic solvent for paraffins and asphaltenes, an aqueous nonformation-damaging component, an inert gas, and surface active agents selected to promote a stable foamed emulsion despite contact of the treating fluid with the hydrocarbon and aqueous environment in the reservoir. Under conditions of agitation, the treating fluid is a stable foamed emulsion which undergoes spontaneous breakdown into two liquid phases under quiescent conditions. The treating fluid is injected and/or circulated as a stable foamed emulsion to dissolve paraffin and asphaltene-containing deposits from various substrata, such as a subterranean reservoir penetrated by a well, the well itself, or an industrial vessel or conduit. When injection or circulation is stopped, the foamed emulsion spontaneously breaks down so that the treating fluid can be readily pumped from the well.

US Patent:

44795432, Oct 30, 1984

Filed:

Jul 28, 1983

Appl. No.:

6/518097

Inventors:

Leonard J. Kalfayan - Claremont CA
David R. Watkins - Irvine CA

Assignee:

Union Oil Company of California - Los Angeles CA

International Classification:

E21B 4327

US Classification:

166300

Abstract:

A method for acidizing siliceous subterranean formations wherein the acidizing composition penetrates the formation to a greater extent before spending comprising injecting into the formation first an organosilane or an ester of an organosilane, preferably in a hydrocarbon carrier liquid, and thereafter an aqueous acidizing composition containing (1) a non-oxidizing mineral acid, acid precursor, low molecular weight organic acid or halogenated derivative thereof, and (2) a fluorine-containing acid or salt.

US Patent:

47372966, Apr 12, 1988

Filed:

Feb 28, 1986

Appl. No.:

6/834884

Inventors:

David R. Watkins - Irvine CA

Assignee:

Union Oil Company of California - Los Angeles CA

International Classification:

E21B 4327
E21B 3700

US Classification:

252 8553

Abstract:

Foamed treating fluids contain an acid component, a gas, optionally an organic solvent and emulsifying agent, and, as a foaming agent, a mixture of a quaternary ammonium halide cationic surface active agent and either an alkylamido alkylamine oxide surface active agent or a betaine amphoteric surface active agent. Such treating fluids can be used to dissolve acid-soluble components from various surfaces, such as a subterranean reservoir penetrated by a well, the well itself, or an industrial vessel or conduit containing a scale.

US Patent:

44985380, Feb 12, 1985

Filed:

Jun 21, 1983

Appl. No.:

6/506537

Inventors:

David R. Watkins - Irvine CA
Leonard J. Kalfayan - Pasadena CA

Assignee:

Union Oil Company of California - Los Angeles CA

International Classification:

E21B 4322

US Classification:

166295

Abstract:

A method for treating formations which contain particulate fines to decrease movement of or swelling of the fines when a fluid passes through the formation, thus maintaining the permeability of the formation, comprising injecting into the formation an organosilane or an ester of an organosilane, preferably in a hydrocarbon carrier liquid.

Address:

281 Saint Albans Ave, South Pasadena, CA 91030

Phone:

(323)2583809

VIN:

YV1MW682672277897

Make:

VOLVO

Model:

V50

Year:

2007