发明名称 |
High Pressure Wireline Top-Entry Packoff Apparatus and Method |
摘要 |
A high-pressure packoff apparatus and method are disclosed. The packoff allows wireline entering a top drive drilling head through a top entry access system to be isolated in such a fashion to minimize the leakage and escape of drillstring fluids to the atmosphere. Optionally, an extension housing containing a flow tube assembly can be employed to accomplish the task. The flow tube assembly effectuates a pressure drop along the wireline conduit run therethrough, thus minimizing the likelihood of fluid escaping.
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申请公布号 |
US2009101359(A1) |
申请公布日期 |
2009.04.23 |
申请号 |
US20040383458 |
申请日期 |
2004.11.17 |
申请人 |
KAUFFMAN VERNON E;LEBLANC DWIGHT R |
发明人 |
KAUFFMAN VERNON E.;LEBLANC DWIGHT R. |
分类号 |
E21B33/072;E21B;E21B19/00;E21B33/06 |
主分类号 |
E21B33/072 |
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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