Compositions – Leather or fur treating
Patent
1975-07-07
1977-02-15
Guynn, Herbert B.
Compositions
Leather or fur treating
166274, 252 855B, 252180, 252, E21B 4322
Patent
active
040081656
ABSTRACT:
A three surfactant system usable in high temperature petroleum formations containing water having from about 200 to about 14,000 parts per million polyvalent ions such as calcium and/or magnesium dissolved therein and a pH of from 5 to 9, and a method of using said surfactant system for recovering petroleum from high temperature subterranean petroleum-containing formations. The three component surfactant system comprises (1) water-soluble salt of an alkyl or alkylaryl sulfonate wherein the alkyl chain may have from 5 to 25 carbon atoms, (2) a phosphate ester surfactant with an average molecular weight not to exceed 1000, and (3) a surfactant having the following betaine related structure: ##STR1## wherein R is an alkyl group having from 12 to 24 carbon atoms, and n is an integer from one to five. The surfactant combination is stable up to at least 225.degree. F and resistant to bacterial attack and inhibits scale formation.
REFERENCES:
patent: 3004056 (1961-10-01), Nunn et al.
patent: 3280179 (1966-10-01), Ernst
patent: 3724544 (1973-04-01), Tate
patent: 3811505 (1974-05-01), Flournoy et al.
patent: 3811507 (1974-05-01), Flournoy et al.
patent: 3827497 (1974-08-01), Dycus et al.
Maddox, Jr. Jim
Tate Jack F.
Guynn Herbert B.
Park Jack H.
Ries C. G.
Texaco Inc.
Whaley T. H.
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