Calgon Corporation

Clearwater, Inc.

Leonard J Persinski

Kevin W Smith

Sally Lee Adams

Fred David Martin

Bennett P Boffardi

Jerry L Walker

Rhonda L Graham

Michael M Cook

Raymond J Schaper

Beverly Bendiksen

Method and composition for gel formation in hydrocarbon recovery, in which an organic phosphate ester is gelled by a novel activator composition comprising iron sulfate, dibutylaminoethanol, and a phosphate surfactant.

Rapid gel formation in hydrocarbon recovery

This invention relates to improved hydrocarbon gels which find use in the fracturing of petroleum producing formations. In particular it relates to the use of a defined class of gelling agents for hydrocarbons which provide excellent results in such fracturing. The gelling agents comprise combinations of selected orthophosphate esters and ferric ammonium citrate or lower alkyl amine derivative thereof. The lower alkyl amine derivatives are referred to as ferric alkylamine citrates.

Ferric alkyl amine citrates and methods of making them

This invention relates to improved hydrocarbon gels which find use in the fracturing of petroleum producing formations. In particular it relates to the use of a define class of gelling agents for hydrocarbons which provide excellent results in such fracturing. The gelling agents comprise combinations of (1) selected orthophosphate esters and (2) a composition comprising a source of ferric ions, an amine, and a polycarboxylic acid or salt thereof.

Preparation of hydrocarbon gels from ferric sources, polycarboxylic acid

This invention relates to improved hydrocarbon gels finding use in the fracturing of formations which produce petroleum and other hydrocarbons. The gelling agents comprise combinations of ferric salts, selected orthophosphate esters, a low molecular weight amine such as triethonolamine or triethylamine, and a surfactant.

Hydrocarbon gels useful in formation fracturing

This invention relates to improved hydrocarbon gels which find use in the fracturing of petroleum producing formations. In particular it relates to the use of a define class of gelling agents for hydrocarbons which provide excellent results in such fracturing. The gelling agents comprise combinations of selected orthophosphate esters and ferric ammonium citrate or lower alkyl amine derivative thereof. The lower alkyl amine derivatives are referred to as ferric alkylamine citrates.

This invention relates to improved hydrocarbon gels which find use in the fracturing of petroleum producing formations. In particular it relates to the use of a defined class of gelling agents for hydrocarbons which provide excellant results in such fracturing. The gelling agents comprise combinations of ferric salts and selected orthophosphate esters.

Multifunctional scale inhibitor compositions, alone or together with polymeric structures, are described which are characterized by having, in addition to a phosphonomethylamino group, a sulfonic acid and/or carboxylic acid group. By incorporating several types of functional groups into a single molecule, control of scale formation and deposition under more severe conditions than normally encountered can be attained.

Multifunctional scale inhibitors

The instant invention is directed to an admixture, and its use in inhibiting scale and corrosion in aqueous systems, comprising:

Synergistic scale and corrosion inhibiting admixtures containing

Methods of using aqueous hydraulic cement compositions containing phosphonobutane tricarboxylic acid as a flow-property-improving and turbulence-inducing additive are disclosed.

Methods of using cementing compositions having improved flow properties,

Methods of using aqueous hydraulic cement compositions containing sulfonated copolymers of styrene-maleic anhydride as flow-property-improving and turbulence-inducing additives are disclosed.

Improved cementing compositions and their use in cementing operations is disclosed, wherein copolymers of hydrolyzed acrylamide and 2-acrylamido-2-methylpropane sulfonic acid derivatives are used as fluid loss additives for aqueous hydraulic cement slurries.

Low fluid loss cementing compositions containing hydrolyzed

Aqueous hydraulic cement compositions containing phosphonobutane tricarboxylic acid as a flow-property-improving and turbulence-inducing additive and its use in cementing wells is disclosed.

Well cementing composition having improved flow properties, containing

Aqueous hydraulic cement compositions containing sulfonated copolymers of styrene-maleic anhydride as flow-property-improving and turbulence-inducing additives and their use in cementing wells is disclosed.

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Pittsburgh, PA, United States of America

Leonard J Persinski