Cst Performance Products Corp.

Conlen Surfactant Technology, Inc.

Glen E Walden

Larry W Gatlin

Ernest McMillan

Richard A Gatlin

Ernest Mcmillan

Wayne Mueller

A crosslinking composition for hydrocarbon gels containing phosphate ester gelling agents comprising a modified imidazoline or pyrimidine including an alkyl group (or unsaturated carbon chain) or of 10 to 22 carbon atoms, a polyamine, and ferric sulfate. The method of making the crosslinking agent features adding the polyamine after reaction of the other ingredients; unique gels formed with the crosslinking agent are particularly effective for LNG at very cold temperatures.

Crosslinking composition for hydrocarbon gels

A composition useful for crosslinking phosphate esters in hydrocarbon gels used in formation fracturing performs especially well in cold temperatures, such as temperatures lower than (&#x2212;)20&#xb0; C. Methods of making the crosslinking composition and the gel are described; also methods of fracturing subterranean formations. Specific forms of ferric sulfate and ferric ammonium citrate are useful as ingredients of the crosslinking composition.

Low temperature hydrocarbon gel II

Where the loss of volatile organics during storage of high gravity oil is minimized by forming a flowable or pumpable gel in the high gravity oil, (and/or condensates and distillates), as they are introduced to a storage vessel, the gel is broken by the addition of a small amount of an amine/formaldehyde reaction product, which may be either a triazine or a mixture of non-triazine reaction products. The previously gelled hydrocarbon may then by more readily moved by draining or pumping into a pipeline.

Breaking pumpable hydrocarbon gels

Low temperature hydrocarbon gel

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The Woodlands, TX, United States of America

Glen E Walden