Conoco Inc.

E.i. Dupont De Nemours and Company

D Philip Cords

Charles R Clark

Edward Francis McBride

Harold E Bellis

Patrick H Fitzgerald

Donald L Whitfill

Burton M Casad

Nicholas O Wolf

Lisa A Cantu

A method of emulsion breaking comprising contacting an emulsion with a substrate having adhered thereto an alkylphenol-polyethylene oxide-acrylate polymer. The emulsion breaking material is used to separate water-in-oil emulsion by coalescence.

Emulsion breaking using alkylphenol-polyethylene oxide-acrylate polymer

Oil field chemicals are incorporated in polymeric particles of the condensation product of hydroxyacetic acid or the co-condensation product of hydroxyacetic acid and other compounds containing hydroxy-, carboxylic acid-, or hydroxycarboxylic acid moieties. The particles are introduced into an oil well bore and/or subterranean oil formation where the polymeric particles dissolve over a period of time and release the oil field chemicals.

Placement process for oil field chemicals

A melted polymer of hydroxyacetic acid with itself or with other hydroxy-, carboxylic acid-, or hydroxycarboxylic acid-containing moieties is subjected to high shear and injected into an organic liquid which is inert to the polymer to form an organic liquid dispersion of very fine polymer particles. In one aspect the melted polymer is combined with the organic liquid and the combination is thereafter subjected to high shear to form the fine particle polymer dispersion. A dispersion agent may also be used to aid in dispersing the particles. The dispersion is used for fluid loss control and gel breaking in subterranean formations.

Process for the preparation of fluid loss additive and gel breaker

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Newark, DE, United States of America

D Philip Cords