发明授权
- 专利标题： Drilling fluid containing a copolymer filtration control agent
- 专利标题（中）： 含有共聚物过滤控制剂的钻井液
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申请号： US590029申请日： 1984-03-15
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公开(公告)号： US4547299A公开(公告)日： 1985-10-15
- 发明人: James M. Lucas
- 申请人： James M. Lucas
- 申请人地址： TX Houston
- 专利权人： Milchem Incorporated
- 当前专利权人： Milchem Incorporated
- 当前专利权人地址： TX Houston
- 主分类号： C09K8/24
- IPC分类号： C09K8/24 ; C09K7/02
摘要：
The invention relates to an aqueous drilling fluid composition, a filtration control agent for utilization in said aqueous drilling fluid, and a method of forming a filter cake on the wall of a well for the reduction of filtrate from said drilling fluid, by utilization of a copolymer of: (1) a (meth) acrylamido alkyl sulfonic acid or alkali metal salt thereof; and (2) N, N-dialkyl (meth) acrylamide. The copolymer may be cross-linked with N,N'-methylenebisacrylamide or other appropriate cross-linking agent.
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