发明名称 |
Specialised petroleum services group limited |
摘要 |
A downhole tool (10) for use in the removal of burrs or other unwanted material from an inner surface of a pipeline, well casing or other tubular. The toll has a plurality of milling elements (32), which may be biased against the surface or retracted from the surface to disengage the toll from the tubular. A drop ball mechanism with a fluid by-pass is described for disengaging the milling elements.
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申请公布号 |
US2005028982(A1) |
申请公布日期 |
2005.02.10 |
申请号 |
US20040493009 |
申请日期 |
2004.09.23 |
申请人 |
HOWLETT PAUL DAVID;TELFER GEORGE |
发明人 |
HOWLETT PAUL DAVID;TELFER GEORGE |
分类号 |
E21B10/32;E21B29/00;(IPC1-7):E21B29/10 |
主分类号 |
E21B10/32 |
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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