发明授权
US4629573A Use of low M.S. hydroxyethyl cellulose for fluid loss control in oil
well applications
失效
使用低M.S. 羟乙基纤维素用于油井应用中的流失控制
- 专利标题： Use of low M.S. hydroxyethyl cellulose for fluid loss control in oil well applications
- 专利标题（中）： 使用低M.S. 羟乙基纤维素用于油井应用中的流失控制
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申请号： US766693申请日： 1985-08-19
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公开(公告)号： US4629573A公开(公告)日： 1986-12-16
- 发明人: Russell H. Raines
- 申请人： Russell H. Raines
- 申请人地址： CT Danbury
- 专利权人： Union Carbide Corporation
- 当前专利权人： Union Carbide Corporation
- 当前专利权人地址： CT Danbury
- 主分类号： C09K8/20
- IPC分类号： C09K8/20 ; C09K7/02
摘要：
Improved drilling operations for recovery of gas and/or oil from a porous subterranean formation are achieved using a drilling fluid, circulated in a well penetrating the subterranean formation, which minimizes loss of said drilling fluid into the surrounding porous formation. The improvement comprises employing a drilling fluid comprising water and an effective amount of hydroxyethyl cellulose having a molar substitution value of from about 1.1 to about 1.6, and an apparent viscosity in water of at least about 15 cps.