Sucker-rod pump oil pumping machine oil pumping control method and its system

Abstract

The invention relates to a method and a system for oil pumping control of an oil pumping unit with a sucker rod pump. In the method, a ground indicating diagram is generated by collecting suspension center load and displacement data of the oil pumping unit; an underground pump power diagram is obtained by calculation according to a wave equation; according to the graphic characteristic of the pump power diagram, fuzzy logic is applied to carry out analysis and control to a traveling valve leakage loss and other pump working conditions; if serious fault occurs, the machine is stopped for detection; otherwise, operating parameters are adjusted according to the full degree of the pump obtained by analysis; if an indirect pumping condition is satisfied, the pumping stop time is calculated or adjusted for carrying out indirect pumping control; otherwise, a new stroke parameter is calculated according to the full degree of the pump. An ARM embedded type oil pumping controller adopting the method can combine the pump power diagram diagnosis with the real-time oil pumping control, realize fault protection, pumping stop, indirect pumping or stroke parameter adjustment and remarkably improve working efficiency.

Description

technical field [0001] The invention belongs to the field of pumping unit control, and relates to a pumping control method and system for a rod pump pumping unit, which is suitable for real-time fault diagnosis, protection and working parameter adjustment of the rod pump pumping unit. Background technique [0002] In crude oil extraction using rod pumps, a large amount of waste of electric energy is the main reason for the high cost of oil extraction. Especially in the late stage of oilfield development, the oil production is seriously insufficient compared to the design value, and the drop of the oil storage liquid level causes serious "empty pumping" or "half pumping" phenomenon in the pumping unit during work, the invalid stroke increases, and the load The efficiency is low, resulting in a great waste of energy, and even damage to the oil pumping facilities. [0003] At present, the control of the rod pump pumping unit is mostly the intermittent pumping control for the p...

AI Technical Summary

Problems solved by technology

Since the application of the pump power chart is not combined with the real-time control of the pumping unit, the real-time performance of such an operation process is poor, and the failure of the pumping unit cannot be found in time, nor can the working parameters of the pumping unit be adjusted in time according to the working conditions. very limited

Images