发明名称 |
PLUNGER LIFT SYSTEM FOR WELL |
摘要 |
A plunger lift system has a bumper and a landing positioned in tubing below a safety valve of a well. A plunger moving between the bumper and landing lifts columns of liquid above the plunger when pushed by downhole pressure. A valve on the plunger's housing is movable between open and closed positions to either permit or prevent flow through the plunger. When the plunger engages the landing, a striker rod on the landing opens the valve permitting fluid communication through the plunger to a sales line at the surface. The valve is biased to t he closed position to prevent fluid communication through the plunger. When the plunge r is disengaged from the striker rod, the valve closes so that application of downhole pressure can again move the plunger uphole. A controller cycles the plunger between the bumper and the landing by controlling fluid flow in the well.</S DOAB>
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申请公布号 |
CA2651083(A1) |
申请公布日期 |
2009.07.25 |
申请号 |
CA20092651083 |
申请日期 |
2009.01.23 |
申请人 |
WEATHERFORD/LAMB, INC. |
发明人 |
HEARN, WILLIAM;CHRETIEN, TODD |
分类号 |
E21B34/06;E21B43/12;F04B47/12 |
主分类号 |
E21B34/06 |
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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