Additives for water-base drilling fluid and process

Details Additives for water-base drilling fluid and process Additives for water-base drilling fluid and process

1986-06-13

1989-01-10

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

5253275, 5253276, 525344, C08F 836

Patent

active

047974508

ABSTRACT:
An additive for water-base drilling fluid compositions used for drilling subterranean wells is disclosed. In one embodiment, the additive is a sulfonated copolymer of recurring units of a maleimide monomer and recurring units of a vinyl monomer. In another embodiment, the additive is a sulfonated terpolymer of recurring units of a maleimide monomer, recurring units of a vinyl monomer, and recurring units of a carboxyl-containing monomer. Water-base drilling fluids compositions which contain the additive and a process for drilling subterranean wells therewith are also disclosed.

REFERENCES:
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patent: 2718497 (1955-09-01), Oldham et al.
patent: 3332872 (1967-07-01), Oakes
patent: 3615531 (1971-10-01), Meyer et al.
patent: 3730900 (1973-05-01), Perrconi et al.
patent: 4284518 (1981-08-01), Chen et al.
patent: 4317893 (1982-03-01), Chen et al.
patent: 4478727 (1984-10-01), Turner et al.
patent: 4581147 (1986-04-01), Branch, III

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