Compositions – Leather or fur treating
Patent
1985-05-28
1987-11-03
Guynn, Herbert B.
Compositions
Leather or fur treating
252 8515, 175 72, 42840224, 523130, 523207, 523210, C09K 706, C09K 700
Patent
active
047042133
ABSTRACT:
The disclosed invention is a novel drilling fluid additive for use in reducing lost circulation in wellbores and a method for employing the invention additive for reducing such lost circulation. The invention additive is a highly oil absorbent polymer encapsulated by a reaction-preventive protective casing to prevent the polymer from expanding by absorbing oil until it is desired to breach the casing. The reaction-preventive protective casing may be a film which will dissolve after a desired time of residence in the borehole or a film or clay which can be ruptured in the formation, releasing the oil absorbent polymer to expand by absorbing oil. The substantially expanded polymer will seal off their zones and fissures, reducing lost circulation.
REFERENCES:
patent: 2836555 (1958-05-01), Armentrout
patent: 2890169 (1959-06-01), Prokop
patent: 3078920 (1963-02-01), ten Brink
patent: 3082823 (1963-03-01), Hower
patent: 3316965 (1967-05-01), Watanabe
patent: 3448800 (1969-06-01), Parker et al.
patent: 3878175 (1975-04-01), Steckler
patent: 3909421 (1975-09-01), Gaddis
patent: 3971852 (1976-07-01), Brenner et al.
patent: 4036301 (1977-07-01), Powers et al.
patent: 4078612 (1978-03-01), Gallus
patent: 4128528 (1978-12-01), Frisque et al.
patent: 4172031 (1979-10-01), Hall et al.
patent: 4182677 (1980-01-01), Bocard et al.
patent: 4191813 (1980-03-01), Reed et al.
patent: 4240800 (1980-12-01), Fischer et al.
patent: 4261422 (1981-04-01), White et al.
patent: 4263407 (1981-04-01), Reed et al.
patent: 4269279 (1981-05-01), House
patent: 4362566 (1982-12-01), Hinterwaldner
patent: 4384095 (1983-05-01), Reed et al.
patent: 4391925 (1983-07-01), Mintz et al.
patent: 4427793 (1984-01-01), Reed et al.
patent: 4428843 (1984-01-01), Cowan et al.
patent: 4442241 (1984-04-01), Drake et al.
patent: 4445576 (1984-05-01), Drake et al.
patent: 4475594 (1984-10-01), Drake et al.
patent: 4498995 (1985-02-01), Gockel
patent: 4503170 (1985-03-01), Drake et al.
patent: 4622193 (1986-11-01), Kresge et al.
patent: 4633950 (1987-01-01), Delhommer et al.
patent: 4635726 (1987-01-01), Walker
patent: 4664816 (1987-05-01), Walker
Delhommer Harold J.
Walker Clarence O.
Delhommer Harold J.
Guynn Herbert B.
Park Jack H.
Priem Kenneth R.
Texaco Inc.
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