<p>Methods of cementing subterranean zones penetrated by well bores and well cement compositions are disclosed. A well cement composition of the invention basically comprises a hydraulic cement, water in an amount sufficient to form a pumpable slurry and a fluid loss control polymer additive comprising 77.9 weight % of the calcium salt of 2-acrylamido-2-methyl propane sulfonic acid, 8 weight % of the calcium salt of malefic acid, 11 weight % of N-vinyl caprolactam, 3 weight % of 4-hydroxybutyl vinyl ether and 0.1 weight % of methylene bisacrylamide.</p>
申请公布号
WO2005080747(A1)
申请公布日期
2005.09.01
申请号
WO2004GB05292
申请日期
2004.12.17
申请人
HALLIBURTON ENERGY SERVICES, INC.;EOFF, LARRY, STEVEN;KEENER, KRISTA, L.;WAIN, CHRISTOPHER, PAUL