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.
本发明涉及一种组合物,该组合物包含盐
水和液态油的混合物,以及(A) 至少一种增粘剂量的含羧基互聚物的酯或其盐,其中互聚物的制备方法是从α-烯烃和
乙烯基芳香族单体组成的组中选出的烯烃与至少一种α、当烯烃为
乙烯基甲苯时,α,β-不饱和
羧酸酰化剂为α,β-不饱和二
羧酸酰化剂。本发明的组合物可用作钻井液和完井液。含羧基互聚物的
酯类或其盐类可为钻井液提供有益的粘度、地层稳定、乳化和流变特性。