Full-filled and oil-discharged double-acting oil pump

Abstract

The invention provides a full-filled and oil-discharged double-acting oil pump. The oil pumpcomprises a fixed structure and a movable structure; the upper end of the fixed structure is connected withan oil pipe; the movable structure is mounted in the fixed structure, and can move in the fixed structure up and down; an outer pipe sleeves the fixed structure from top to bottom; the bottom end of the outer pipe is arranged on a fixed-pressure valve for keeping seal, and the upper end is fixed through a pressing cap; and the pressing cap is in threaded fixation with an exhaust valve. The outer pipe is a necessary conventional fitting of the oil pump, and is used for preventing the extrusion deformation of a bent well section of a pump drum, the vibration during working of the pump and accidents caused by looseness and unlocking of pipe columns due to the well wall collision. The technical scheme solves such problems as need of adding an oil discharger and environmental pollution easily caused by no air preventing measure, oil-air mixed pumping, low oil pumping efficiency and no oil discharging function in a traditional oil pump.

Description

technical field [0001] The invention relates to the technical field of oil pumping equipment in an oil field, in particular to a double-acting shaft oil pump capable of filling up and draining oil at the same time. Background technique [0002] At present, the whole tube type oil well pump is generally used in the oil field, which has high reliability, especially the processing and manufacturing technology of the pump barrel and the plunger with the friction pair, which has been proved to be ideal in practice, but there are many differences in the structure. The problem of satisfactory, in general, is too simple, primitive and backward; [0003] The primary problem is that there is no anti-gas measure, oil and gas mixed pumping, low pump efficiency is inevitable, not only waste a lot of energy but also cause great damage to the pumping system; although there are also gas anchors, they are all installed in the lower part of the pump, the pump from Among them, when the oil is...

AI Technical Summary

Problems solved by technology

[0007] According to the technical problems that the existing oil well pump proposed in the above prior art has no anti-gas measures, mixed pumping of oil and gas, low oil pumping efficiency, and no oil drainage function, it is easy to cause environmental pollution and need to add an oil drainer, etc., and provides a A double-acting oil well pump that can be filled with oil and can be drained is used to solve the problems in the prior art

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