Drilling fluids

Details Drilling fluids Drilling fluids

1984-06-11

1986-08-05

Lieberman, Paul

Compositions

Leather or fur treating

252 8511, C09K 700

Patent

active

046042164

ABSTRACT:
Polymers derived by copolymerizing a hydrophilic vinyl monomer, such as acrylic acid, with at least one hydrophobic vinyl monomer, such as an acrylic acid ester, a methacrylic acid ester, a vinyl ester of a saturated monocarboxylic acid having from 1 to 3 carbon atoms, and the like, prepared in a suitable inert, low chain transfer, organic liquid medium, such as n-hexane, cyclohexane, and chlorofluorocarbons such as 1,1,2-trichloro-1,2,2-trifluoroethane, and neutralized by a suitable base while still slurried in the inert low chain transfer organic liquid medium, perform effectively as water loss additives for drilling fluids under high temperature conditions. Such water loss control additives are especially effective when employed in drilling fluids having high solids content. Also disclosed are drilling fluids employing such water loss control additives as well as a method of drilling a bore hole in the earth using drilling fluids employing such water loss control additives.

REFERENCES:
patent: 2244703 (1941-06-01), Hubbuch
patent: 2718497 (1955-09-01), Oldham et al.
patent: 3915921 (1975-10-01), Schlatzer, Jr.
patent: 3943111 (1976-03-01), Fritze et al.
patent: 4066583 (1978-01-01), Spaulding
patent: 4394483 (1983-07-01), Hobes et al.

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