发明名称 |
Composition and method for temporarily reducing the permeability of subterranean formations. |
摘要 |
<p>This invention relates to a composition and method of temporarily reducing the permeability of subterranean formations penetrated by a wellbore. In particular, it relates to an inexpensive, low molecular weight condensation product of hydroxy acetic acid with itself or compounds containing other hydroxy-, carboxylic-acid-, or hydroxycarboxylic-acid moieties and method for preventing fluid loss during well treatment.</p> |
申请公布号 |
EP0228196(A2) |
申请公布日期 |
1987.07.08 |
申请号 |
EP19860309392 |
申请日期 |
1986.12.02 |
申请人 |
E.I. DU PONT DE NEMOURS AND COMPANY |
发明人 |
BELLIS, HAROLD EDWARD;MCBRIDE, EDWARD FRANCIS |
分类号 |
E21B43/22;C09K8/88;E21B33/138;E21B43/25;(IPC1-7):E21B33/138 |
主分类号 |
E21B43/22 |
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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