C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
C09K 8/36 (2006.01) C08L 33/00 (2006.01) C08L 35/00 (2006.01) C09K 8/28 (2006.01) C09K 7/02 (1990.01)
Patent
CA 2091419
2600B Title: COMPOSITIONS CONTAINING ESTERS OF CARBOXY- CONTAINING INTERPOLYMERS AND METHODS OF USING THE SAME Abstract of the Invention This invention relates to a composition comprising a mixture of a brine and a liquid oil, and (A) a viscosity increasing amount of at least one ester of a carboxy-containing interpolymer or salt thereof wherein the interpolymer is prepared by polymerizing an olefin selected from the group consisting of alpha-olefins and vinyl aromatic monomers with at least one alpha, beta-unsaturated carboxylic acylating agent, and provided that when the olefin is vinyl toluene, then the alpha, beta-unsaturated carboxylic acylating agent is an alpha, beta-unsaturated dicarboxylic acylating agent. The compositions of the present invention are useful as drilling fluids as well as completion fluids. The esters of the carboxy-containing interpolymer or salts thereof provide beneficial viscosity, formation stabilization, emulsification and rheology properties to the fluids.
Bush James H.
Jahnke Richard W.
Kocurek Lawrence J.
Ridout & Maybee Llp
The Lubrizol Corporation
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