发明名称 |
COMPOSITIONS AND METHODS OF USING A POLYMERIC PRECIPITATE TO REDUCE THE LOSS OF FLUID TO A SUBTERRANEAN FORMATION |
摘要 |
Methods are provided for reducing the loss of a wellbore servicing fluid to a subterranean formation. A polymeric solution and an activator may be contacted in the formation, thereby forming a precipitate to at least partially block fluid from flowing further into the formation. The fluid may be, for example, a drilling fluid, a cement composition, a workover fluid, or combinations thereof. The polymeric solution may comprise a polyvinylpyrrolidone aqueous solution, and the activator may comprise a formate brine. In one embodiment, the polymeric solution and the activator are contacted before completing a drilling operation in the wellbore. hi another embodiment, they are contacted before completing a primary cementing operation in the wellbore. In yet another embodiment, they are contacted before completing a secondary cementing operation in the wellbore. When desirable, the precipitate may be easily and quickly removed from the subterranean formation by dissolving it in fresh water. |
申请公布号 |
WO2006111703(A3) |
申请公布日期 |
2007.03.29 |
申请号 |
WO2006GB01244 |
申请日期 |
2006.04.05 |
申请人 |
HALLIBURTON ENERGY SERVICES, INC;CURTIS, PHILIP, ANTHONY;OYLER, KENNETH, W.;THAEMILZ, CARL, J. |
发明人 |
OYLER, KENNETH, W.;THAEMILZ, CARL, J. |
分类号 |
C09K8/12;C09K8/42;C09K8/487 |
主分类号 |
C09K8/12 |
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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