发明名称 |
Gas operated automatic, liquid pumping system for wells |
摘要 |
An improved, unattended, liquid pumping device for oil and gas wells featuring a bellows controlled flow valve that opens and closes at preset pressures. Additionally a well head receiver design that releases shut in production gas below the pumping device and provides a positive pressure differential across the pumping device prior to valve opening.
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申请公布号 |
US6851480(B2) |
申请公布日期 |
2005.02.08 |
申请号 |
US20020118463 |
申请日期 |
2002.04.08 |
申请人 |
BRANDYWINE ENERGY AND DEVELOPMENT COMPANY, INC. |
发明人 |
SWOYER GERALD L.;HUNT CHARLES H.;YANIGA PAUL M.;BORDOGNA RICHARD J. |
分类号 |
E21B43/12;(IPC1-7):E21B43/18;F04B47/12 |
主分类号 |
E21B43/12 |
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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