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发明公开
CN102796500A 一种固井用低水化热早强水泥 无效 - 驳回

一种固井用低水化热早强水泥
摘要：
本发明涉及一种固井用低水热早强水泥，其在石油钻井工程中用于永冻层或深水含水合物地层，其组分及质量百分比为：低温早强水泥30％～70％、火山灰质材料20％～50％、微细球形颗粒10％～40％，该水泥的水化热仅为常规水泥的1/2，并且低温强度发展快，可配制低水化热水泥浆，具有较好的效果和广泛的应用。
摘要（英）：

The invention relates to low-hydration-heat early-strength cement for well cementation, which is used in permafrost horizon or deepwater hydrate-bearing strata in oil drilling engineering. The cement disclosed herein comprises the following ingredients: 30-70wt% of low-temperature early-strength cement, 20-50wt% of pozzolanic material, and 10-40wt% of fine spherical particles. According to the invention, the hydration heat of the cement disclosed herein is 1/2 of that of ordinary cement, the low temperature strength develops fast; and the cement disclosed herein can be prepared into low-hydration-heat cement mortar, and has good effect and wide application.

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