Flexible traction oil pumping mechanism capable of detecting and controlling effective stroke of plunger in real time

Abstract

The invention provides a flexible traction oil pumping mechanism capable of detecting and controlling an effective stroke of a plunger in real time. The flexible traction oil pumping mechanism capableof detecting and controlling the effective stroke of the plunger in real time comprises a driving mechanism, a flexible traction part, an oil pipe, a plunger pump, a counterweight block, a controller, a sleeve pipe, a second one-way valve and a limiting guide pipe, wherein the upper end of the flexible traction part is connected to the driving mechanism, the plunger pump is connected to the lowerend of the oil pipe, the counterweight block is connected to the lower end of the plunger pump, the controller is connected to the driving mechanism and is used for controlling the movement of the driving mechanism, the sleeve pipe is connected to the lower end of the plunger pump, the second one-way valve is located at the lower end of the inner portion of the sleeve pipe, and the limiting guidepipe is located between the counterweight block and the second one-way valve. The plunger pump comprises a pump barrel and a plunger, and the pump barrel communicates with the oil pipe. A first one-way valve is arranged in the plunger. The lower end of the flexible traction part is connected with the plunger after penetrating through the oil pipe. A detection metal block is installed inside the limiting guide pipe. An upper end position inductor and a lower end position inductor are arranged between the sleeve pipe and the limiting guide pipe. According to the flexible traction oil pumping mechanism capable of detecting and controlling the effective stroke of the plunger in real time, the effective stroke of the plunger is detected, it is guaranteed that every upper stroke and every lowerstroke can reach a predetermined position, and the effectiveness and efficiency of oil pumping are ensured.

Description

technical field [0001] The invention relates to the field of mining equipment for underground oil / gas and other resources, in particular to a flexible traction oil pumping mechanism capable of real-time detection and control of plunger travel. Background technique [0002] The traditional rod pumping system uses a rigid sucker rod to transmit energy, and drives the sucker rod to reciprocate up and down through the kowtow machine (ie beam pumping unit), thereby driving the plunger in the plunger pump to move up and down. So as to realize oil pumping, which is the most widely used oil extraction equipment at present. However, with the depletion of oil field resources, oil wells are getting deeper and deeper, and the required sucker rods are also getting longer and longer. The disadvantages brought about by their own weight and eccentric wear make the cost of oil production continue to increase. For this reason, the patent application document with the publication number CN107...

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Problems solved by technology

[0003] The invention provides a flexible traction oil pumping mechanism that can detect and control the effective stroke of the plunger in real time, which solves the problem of low oil pumping efficiency or even oil pumping failure in the prior art due to the elastic modulus of the flexible traction member question

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