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发明公开
CN1778751A 触变早强防窜低密度水泥浆 无效 - 撤回

触变早强防窜低密度水泥浆
摘要：
本发明涉及石油钻井工程领域注水泥固井所用的水泥浆体系，由水泥混合减轻剂、稳定剂、早强剂、防气窜剂外加剂以及湿混的外加剂即降失水剂、减阻剂、缓凝剂或促凝剂和消泡剂组成，在低剪切速率4000rpm下混合均匀。本发明解决了其它低密度水泥浆降低密度有限、体系稳定性差、强度偏低、渗透率偏高、难以满足后续施工需要的问题，能在使体系获得良好综合工程性能的条件下将体系密度降低到其它低密度水泥浆难以达到的超低水平，如1.25g/cm3，从而解决超低压易漏地层固井容易井漏的问题。
摘要（英）：

A thixotropic early-strength low-density cement mortar against gas play consists of cement mixed reducer, stabilizer, premature enhancer, gas play resistant applier and wet mixed applier with water reducer, friction reducer, coagulation inhibitor or coagulation improver and antifoaming agent. It is prepared by mixing at low shearing speed 4000rpm. Its advantages include higher density and strength, low permeability and better system stability.

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