Oil-submersible electric membrane pump

Abstract

The present invention relates to a submersible electric diaphragm pump related to field of submersible electric pump. The pump is consisted of an upper pump body, a middle pump body and a lower pump body, the lower pump body has a transmission shaft, an axial bevel gear, a radial bevel gear, a camshaft and a cam; the middle pump body has a piston, a bush, a slide valve, an oil drain valve, an induction valve and a spring in it; a septum is provide between the upper pump body and the middle pump body to separate lubricant and well liquid, a suction valve and a vent valve are mounted in the upper pump body. The present invention improved totally the impeller (turbine) direct aspiration of present submersible electric pump in structure, realizes septum working cavity shrinking and expending by to-and-fro motion driven by piston to realize pump drain of oil finally, reaches the target of small displacement mining oil in high efficiency and energy efficiency.

Description

technical field

[0001] The invention relates to a submersible electric diaphragm pump in the field of electric submersible pumps. Background technique

[0002] The combination of submersible electric pump and motor to achieve downhole oil recovery is a commonly used technical means in the field of oil extraction. The currently used submersible electric pump mainly pumps the oil outside the pump body into the oil pipe through the rotating impeller in the pump body to realize the collection of downhole oil. This kind of pump has the characteristics of large displacement to collect underground oil. With the prolongation of the underground oil extraction period, a large number of low-permeability oil wells have appeared, and the oil discharge (permeation) volume has decreased. The continued use of the existing submersible electric pump will inevitably lead to the operation of the submersible electric pump under low load. The problem of reducing and relatively increasing energy ...

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