| 摘要 |
<p>A downhole well pump powered by pressurized fluid conducted to it through a power fluid conduit connected to its upper end by a remotely releasable connector which makes it possible to run and retrieve the pump either at the time the power fluid conduit is run or retrieved, or separately, and when run or pulled separately either through use of the conduit or other means such as wireline, rods, pipe, or the like, the connector being releasable simply by dropping a ball into the conduit and then building fluid pressure against the ball. Actuation of the connector to disconnect also opens a drain or equalizing passage in the pump automatically. The power fluid conduit being inside the well tubing makes it practical to install this pump in wells having casing of sizes insufficient to accommodate power fluid conduits exterior of the tubing. Installations and methods for their preparation are also disclosed. Gas lift valves may be used in the power fluid conduit, where the power fluid is gas.</p> |
