Well servicing fluid

Details Well servicing fluid Well servicing fluid

1990-12-31

1991-07-02

Stoll, Robert L.

Compositions

Leather or fur treating

252 851, 252 8513, 252 8514, 106 3835, 166285, 166294, 166295, 524 5, C09K 702

Patent

active

050283413

ABSTRACT:
An additive for well servicing fluids containing a partially hydrolyzed acrylamide for use in downhole environments having a high calcium ion content comprising an alkali metal bicarbonate, a water-soluble carboxylic acid and a copolymer of acrylamide, an acrylic acid and 2-acrylamido-2-methylpropanesulfonic acid, the additive being used to formulate aqueous well servicing fluids, particularly drilling fluids, and for a method of treating an aqueous well servicing fluid containing partially hydrolyzed acrylamide to prevent unwanted reactions between calcium ions and the partially hydrolyzed polyacrylamide.

REFERENCES:
patent: 2775557 (1956-12-01), Morgan
patent: 3637031 (1972-01-01), Hull et al.
patent: 3738437 (1973-06-01), Scheuerman
patent: 3953335 (1976-04-01), Jackson
patent: 3986964 (1976-10-01), Smithey
patent: 4008164 (1977-02-01), Watson et al.
patent: 4015991 (1977-04-01), Persinski et al.
patent: 4600515 (1986-07-01), Gleason et al.
patent: 4664818 (1987-05-01), Halliday et al.
patent: 4883125 (1989-11-01), Wilson et al.

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