发明申请
US20050039911A1 Maximizing the efficacy of thiocyanate scavengers in oilfield brines
审中-公开
最大化硫氰酸盐清除剂在油田盐水中的功效
- 专利标题： Maximizing the efficacy of thiocyanate scavengers in oilfield brines
- 专利标题（中）： 最大化硫氰酸盐清除剂在油田盐水中的功效
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申请号： US10646546申请日： 2003-08-21
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公开(公告)号： US20050039911A1公开(公告)日： 2005-02-24
- 发明人: Joel Carpenter , Bonnie McKinnie , Techen Tsao
- 申请人： Joel Carpenter , Bonnie McKinnie , Techen Tsao
- 主分类号： C09K8/54
- IPC分类号： C09K8/54 ; E21B17/00 ; E21B43/00
摘要：
A cause has been discovered for the problem of formation of corrosive sulfur-containing decomposition products of an inorganic thiocyanate in a downhole oilfield operation in which an inorganic thiocyanate corrosion inhibitor is used in a concentrated brine solution. The cause is the presence in the brine of methanol from several potential sources. Methods and compositions are described which enable inorganic thiocyanate to be used with concentrated brine solutions in downhole oilfield operations without such decomposition taking place. These compositions are free of a thiocyanate-decomposing amount of methanol.