发明名称 |
Preload and Centralizing Device for Milling Subterranean Barrier Valves |
摘要 |
A device is associated with a downhole tool to control the weight that can be set down on the tool while the tool is operating. A shroud is secured to the string that supports the tool with interior modular biasing components that for run in extend the tool past the shroud. Upon encountering a support for the tool, further set down weight compresses the biasing components for a predetermined stroke length delineated by the shroud landing on a support. If the tool is a mill, its operation takes place under the biasing force as the mill advances into the piece being cut or milled under a predetermined pressure. When the mill reaches full extension form the shroud the process can be repeated until the milling is complete. The shroud also centralizes the mill during milling. |
申请公布号 |
US2014060801(A1) |
申请公布日期 |
2014.03.06 |
申请号 |
US201213605166 |
申请日期 |
2012.09.06 |
申请人 |
COLEMAN DAVID W.;VINCENT BENNY J.;BAKER HUGHES INCORPORATED |
发明人 |
COLEMAN DAVID W.;VINCENT BENNY J. |
分类号 |
E21B29/00;E21B17/14 |
主分类号 |
E21B29/00 |
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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