Earth boring – well treating – and oil field chemistry – Earth boring – Contains organic component
Patent
1996-03-04
1997-03-04
Tucker, Philip
Earth boring, well treating, and oil field chemistry
Earth boring
Contains organic component
507121, 507225, 507226, 507119, C09K 702
Patent
active
056079028
ABSTRACT:
Swelling and migration of subterranean clay is inhibited during drilling for and stimulation of the production of hydrocarbon fluids, and preparation therefor, by treating said formations with a copolymer of about 5% to about 50% of an anionic monomer such as acrylic acid, methacrylic acid, or 2-acrylamido-2-methyl propane sulfonic acid and the balance a cationic monomer selected from dimethyl diallyl ammonium chloride, or acryloxy or methacryloxy ethyl, propyl or 3-methyl butyl trimethyl ammonium chlorides or methosulfates. Permeability damage to the formation is reduced in the presence of the copolymer; it is particularly effective in spite of the presence of a foaming agent.
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Smith Kevin W.
Thomas Todd R.
Clearwater, Inc.
Krayer William L.
Tucker Philip
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