| 摘要 |
<p>A gas lift plunger, comprises: a housing movable within tubing of a well and defining a passage and a valve disposed on the housing and movable to open and closed positions relative to the flow passage. The valve is engageable with an uphole element and is movable thereby to the open position, the valve in the open position permitting fluid communication through the flow passage, and the valve in the closed position preventing fluid communication through the flow passage. The plunger is movable uphole by application of downhole pressure and lifting a fluid column above the plunger when moved uphole.</p> |
