发明名称 |
Method and device for conveying chemicals through borehole |
摘要 |
A capsule for conveying chemicals through a borehole for stopping lost circulation is totally made from a thermoplastic or fragile material or has a bottom plate made from such a material. The capsule containing the chemicals is let down until it reaches the location of the lost circulation, where the capsule is either destroyed by a drilling rod or softened by the high temperature and high pressure at the location. Thus, the chemicals are diffused.
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申请公布号 |
US4721159(A) |
申请公布日期 |
1988.01.26 |
申请号 |
US19860926640 |
申请日期 |
1986.11.04 |
申请人 |
TAKENAKA KOMUTEN KK;SEKISO KK |
发明人 |
OHKOCHI, KATSUTOSHI;SHINOZAKI, MAMORU;OHSHITA, TOSHIYUKI;KITANO, MASAYASU;KAMATA, SEIZO |
分类号 |
E21B27/02;(IPC1-7):E21B33/13 |
主分类号 |
E21B27/02 |
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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