发明公开
- 专利标题： Removal of water-based drilling fluids from downhole surfaces
- 专利标题（中）： Bohrloch博士
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申请号： EP03252719.4申请日： 2003-04-30
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公开(公告)号： EP1391580A2公开(公告)日： 2004-02-25
- 发明人: Chatterji, Jiten , Dealy, Sears T. , Crook, Ronald J.
- 申请人： Halliburton Energy Services, Inc.
- 申请人地址： P.O. Box 1431 Duncan, Oklahoma 73536 US
- 专利权人： Halliburton Energy Services, Inc.
- 当前专利权人： Halliburton Energy Services, Inc.
- 当前专利权人地址： P.O. Box 1431 Duncan, Oklahoma 73536 US
- 代理机构： Wain, Christopher Paul
- 优先权： US219642 20020815
- 主分类号： E21B43/22
- IPC分类号： E21B43/22 ; E21B37/06
摘要：
Water-based drilling fluids are removed from downhole surfaces in a well bore, leaving the surfaces water-wet, by contacting the surfaces with a water-based removal solution comprised of water and a mixture of a sulfonated kraft lignin salt and an N-methyl-N-oleyltaurine salt dissolved therein is provided. The solution can be used as a spacer between drilling fluid and a cementing composition.
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