| 摘要 |
A down-hole pump provides positive displacement pump action within a production string of a producing well. The insert pump of the present invention fits within a crossover nipple that is adapted to fit on the end of a production string. The pump seals within an intermediate casing to direct high pressure drive fluid into the pump. The drive fluid directed into the pump passes through a nozzle segment of the pump to develop a high velocity annular flow region. Production fluid is drawn into the nozzle segment at the Vena Contracta of the nozzle to develop the maximum entrainment force by the drive fluid. The combined flow of the drive and production fluids is then directed into a Venturi segment that creates a vacuum condition to increase production flow from the producing structures.
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