发明名称 |
Grease injection control system |
摘要 |
A system for sealing around a wireline run into or pulled from wells includes a grease control head with a line wiper mounted on the well head and a grease injection control system. The grease injection control system supplies grease continuously at a constant pressure for injection into the grease control head. The control system utilizes a piston pump to supply grease to a grease chamber in a pressurizing accumulator. The accumulator has another chamber connected to a remote pressure source, which is separated from the grease chamber by a moveable partition. Constant pressure from the remote source is transmitted through the moveable partition to grease in the grease chamber maintaining a constant pressure on grease injected into the grease control head. The sealing system is provided with a conduit to return injected grease pumped through the grease head to a waste grease reservoir for disposal. This conduit includes a valve which may be closed to aid in reestablishing a blownout grease seal.
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申请公布号 |
US4821799(A) |
申请公布日期 |
1989.04.18 |
申请号 |
US19880192670 |
申请日期 |
1988.05.10 |
申请人 |
OTIS ENGINEERING CORPORATION |
发明人 |
WONG, KWOK-PING |
分类号 |
E21B33/072;F16J15/40;(IPC1-7):E21B33/072 |
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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