| 摘要 |
A multiple well pump assembly tool. The tool is designed to allow use of multiple submersible pumps in a single borehole. The tool collects the output from two or more pumps and discharges the combined output into the well discharge line. The tool may be utilized for efficiently controlling pump output to meet varying load demands, or alternatively for incrementally increasing output from a deep well. The tool may also be used to provide a primary and a standby pump in a single well bore. The rugged tool assembly is advantageous for pumping deep wells of relatively small diameter where high output is required. In one embodiment, a first header gathers output from a lower pump, and a second header combines that output with the output from a second pump and sends the total output to the well discharge pipe. In another embodiment, one or more intermediate headers are inserted between the lower and the upper header, with each intermediate header collecting the output from a pump attached thereto as well as the combined output from pumps therebelow. One or more longitudinally running integral strengthening ribs are provided in the pump discharge portions which interconnect the various headers to minimize stress fatigue or failure as a result of repeated repressurizations during normal use.
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