发明名称 |
COMPOSITIONS AND METHODS FOR TREATING LOST CIRCULATION |
摘要 |
A cement system for use in treating lost circulation includes a slurry of cement, water and a super-absorbent polymer which absorbs free water in the slurry to form a gel - ore preferably a solid-like structure - when placed in the well, and which releases the absorbed water to the cement hydration reaction as the cement sets. The absorption of water causes the slurry to develop a solid-like structure. In one embodiment, the superabsorbent is polyacrylamide or modified crosslinked poly(meth)acrylate. Also presented is a method of treating lost circulation by pumping the above-mentioned cement system. |
申请公布号 |
WO2004101463(A2) |
申请公布日期 |
2004.11.25 |
申请号 |
WO2004EP05124 |
申请日期 |
2004.05.12 |
申请人 |
SERVICES PETROLIERS SCHLUMBERGER;SCHLUMBERGER TECHNOLOGY B.V.;SCHLUMBERGER HOLDINGS LIMITED;SCHLUMBERGER CANADA LIMITED;SOFITECH N.V.;ZUSATZ, BENEDICTE;NILSSON, FREDERIK |
发明人 |
ZUSATZ, BENEDICTE;NILSSON, FREDERIK |
分类号 |
C04B28/02;C04B40/06;C09K8/467 |
主分类号 |
C04B28/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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