发明名称 |
Polished rod protection and sealing device |
摘要 |
A reciprocable polished rod projects through a housing and a stuffing box downstream of the housing. A plurality of packings are provided in the upper portion of the housing and contacting the rod preventing fluid leakage from the housing. A retainer holds the packings in place and adjustable pressure is exerted on the retainer and on the packings.
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申请公布号 |
US5257812(A) |
申请公布日期 |
1993.11.02 |
申请号 |
US19910801477 |
申请日期 |
1991.12.02 |
申请人 |
CORPOVEN, S.A. |
发明人 |
OSORIO, OSMALY;HERNANDEZ, ARCANGEL |
分类号 |
E21B33/08;(IPC1-7):E21B33/08 |
主分类号 |
E21B33/08 |
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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