发明名称 |
ROTARY BLOWOUT PREVENTER |
摘要 |
<p>ROTARY BLOWOUT PREVENTER A rotary blowout preventer having a radially compressible packing to be sealingly engaged with and rotated by a drill pipe or kelly and a hydraulically actuated wedging piston for compressing the packing is provided with a rotatable bearing support which in an exemplary embodiment includes an inverted truncated cone interposed between the packing and the piston, which is rotatably mounted to the piston by a plurality of bearing races, along with a thrust bearing interposed between the packing and the housing enable the packing to rotate relative to the housing and prevents upward axial motion of the packing.</p> |
申请公布号 |
CA1199865(A) |
申请公布日期 |
1986.01.28 |
申请号 |
CA19830432810 |
申请日期 |
1983.07.20 |
申请人 |
SHAFFER, DONALD U.;OULREY, GARY M. |
发明人 |
SHAFFER, DONALD U.;OULREY, GARY M. |
分类号 |
E21B33/035;E21B33/06;E21B33/08;(IPC1-7):E21B33/06 |
主分类号 |
E21B33/035 |
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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