Swabbing parameter matching non-stop intermittent oil pumping and production system

Abstract

The invention relates to a swabbing parameter matching non-stop intermittent oil pumping and production system. The system is characterized by being composed of an intelligent controller, a frequencyconverter and a special oil pump. An electric parameter test acquisition device is installed in the intelligent controller, embedded software is written in the intelligent controller, the active powerof a pumping unit is tested in real time, the working fluid level depth of an oil well is calculated according to the active power and structural parameters of the pumping unit, on this basis, when the working fluid level reaches a certain range, an intelligent program is started automatically, every time after the pumping unit reaches a top dead center, a crank is controlled to swing within a small angle range instead of immediate starting of a lower stroke, the time is provided for filling of the special oil pump, after the crank swings for a set time, an oil production program is started,and the operations are repeated; the oil pump is kept to always work under the optimal submergence condition while the high pumping efficiency is ensured; meanwhile, the pumping diameter of the oil pump is increased, the oil production stroke frequency of the pumping unit is greatly reduced under the condition of the same liquid yield, and the energy consumption of the system is reduced.

Description

technical field [0001] The invention relates to a non-stop oil pumping system for matching pumping parameters. Background technique [0002] With the development of oil recovery technology, oil fields need to have a comprehensive grasp of the data of production blocks, real-time perception and monitoring of the production status of oil production equipment, so as to realize digital management of oil fields. [0003] The difference between the depth of the pump under the oil well pump and the depth of the fluid surface of the oil jacket ring is called the submergence. If the submergence is too low, the wear of the oil pipe and the sucker rod will be increased. At the same time, the crude oil will be degassed and the viscosity will increase, resulting in wax deposition on the rod and pipe. If the subsidence is too high, the flow pressure of the oil well will increase. When it exceeds a reasonable limit, it will inhibit the low-permeability oil layer from flowing out, and the c...

AI Technical Summary

Problems solved by technology

[0005] However, this intermittent pumping scheme for long-term shutdowns still has some incompatibility:

[0006] ①The range of dynamic liquid level is large, and reasonable submergence cannot be guaranteed. The liquid supply of the pump is insufficient, and the wear of the plunger and the pump barrel is accelerated. At the same time, liquid hammer occurs during pumping, which causes additional impact loads and damages the oil production system;

[0007] ②Manual operation is required for shutting down and starting pumping, and the distribution of oil wells in the oil field is relatively scattered, which increases the difficulty of oil well management;

[0008] ③The temperature in Northeast China is low in winter, and the disturbing effect of the sucker rod is lost during shutdown, which increases the possibility of freezing the wellhead and wax formation, resulting in unstable production;

[0009] ④The range of fluid level in the annular space is large, the balance of the pumping unit is affected, and the energy consumption increases

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