发明名称 Gas-generating additives having improved shelf lives for use in cement compositions
摘要 According to various embodiments, gas-generating additives for use in a cement composition comprise: a gas-generating material at least partially coated with a mixture comprising a fatty acid ester of sorbitan, glycerol, or pentaerythritol and having a shelf life of about 12 months or greater. The gas-generating additives may also include a C8-C18 hydrocarbon. In more embodiments, cement compositions comprise: a gas-generating material at least partially coated with a mixture comprising a fatty acid ester of sorbitan, glycerol, or pentaerythritol and a C8-C18 hydrocarbon for increasing a shelf life of the gas-generating material. In yet more embodiments, cement compositions comprise: a cement; a fluid for making the cement composition pumpable; a hydrogen-generating material at least partially coated with a mixture for delaying a hydrogen-generating reaction, the mixture comprising sorbitan monooleate and an isoparaffin.
申请公布号 US7473313(B2) 申请公布日期 2009.01.06
申请号 US20050153087 申请日期 2005.06.15
申请人 HALLIBURTON ENERGY SERVICES, INC. 发明人 SANTRA ASHOK K.;MCKINLEY RITA J.
分类号 C04B24/00 主分类号 C04B24/00
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