Through the experiments, we have studied the working characteristics of the down-hole pump at different inclined angles and studied the moving pattern of ball valves.

以试验为手段，研究了深井泵在一定倾斜角度下的工作特性及球阀的运动规律。

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Electrical submersible pump lifted Wells is the main high rate artificial lift method in the high water cut period, but it is difficult to determine the down hole failure during productions.

油田进入高含水期所采用的电潜泵作为增大排液量的方法，在生产过程中容易出现许多不易判断的井下故障。

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In the light of the key technique of the down-hole driven progressive cavity pump (PCP) for oil production, a power distributional planetary reducer is proposed.

针对井下驱动螺杆泵的关键技术问题，提出了用于井下直接驱动螺杆泵的功率分流式行星减速器。

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