发明名称 |
SHEAR-SENSITIVE PLUGGING FLUID FOR PLUGGING AND A METHOD FOR PLUGGING A SUBTERRANEAN FORMATION ZONE |
摘要 |
<p>A plugging fluid for plugging a subterranean formation zone surrounding a drill hole comprises an emulsion comprising a dispersed aqueous phase containing an aqueous base and a continuous hydrophobic phase containing a polymer consisting of a grafted cellulose ether derivative, a surfactant and a crosslinking activator of the polymer. The polymer is preferably 2-hydroxyethyl cellulose grafted with vinyl phosphonic acid. Upon shearing, preferably through the drilling bit, the emulsion inverts so that the rupture of the emulsion droplets releases the crosslinking activator into the water phase thus forming a gel structure.</p> |
申请公布号 |
EP1412614(B1) |
申请公布日期 |
2006.09.06 |
申请号 |
EP20020754916 |
申请日期 |
2002.07.19 |
申请人 |
SERVICE PETROLIERS SCHLUMBERGER;SCHLUMBERGER HOLDINGS LIMITED;SCHLUMBERGER TECHNOLOGY B.V.;SOFITECH N.V. |
发明人 |
MABERRY, JACK;GARRISON, GREG;GARNIER, ANDRE |
分类号 |
E21B43/02;C09K8/502;C09K8/512;C09K8/565;C09K8/575;E21B33/138 |
主分类号 |
E21B43/02 |
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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