发明名称 |
WASHPIPE APPARATUS |
摘要 |
Methods and apparatus for providing enhanced seal life of a swivel seal assembly by decreasing the effective differential pressure across a given rotating seal. The differential pressure is decreased by providing a pressurized fluid on the low-pressure side of the seal at a predetermined fraction of the operating pressure of the swivel seal assembly. A preferred swivel seal assembly utilizes a washpipe and packing box that are rigidly affixed to their respective conduits such that misalignment and dynamic run-out is compensated for in the gap between the washpipe and the packing box. A control system monitors and regulates the pressurized fluid supplied to the assembly.
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申请公布号 |
CA2462798(A1) |
申请公布日期 |
2004.10.15 |
申请号 |
CA20042462798 |
申请日期 |
2004.03.31 |
申请人 |
NATIONAL-OILWELL, L.P. |
发明人 |
KUBINSKI, MICHAEL J.;DINKEL, JEFFERY J.;MORROW, WESLEY C. |
分类号 |
F16L17/10;F16L27/08;(IPC1-7):E21B21/02 |
主分类号 |
F16L17/10 |
代理机构 |
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代理人 |
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地址 |
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