Anti-scaling pumping system for ASP flooding well

Abstract

The invention provides an antiscale oil pumping system for a three-component compound flooding well. Scales can be effectively prevented from being deposited, the stuck pump phenomenon in the oil pumping process is avoided, the repairing and maintaining cost of oil production equipment is lowered, and it can be better guaranteed that oil production operation is conducted smoothly. The antiscale oil pumping system for the three-component compound flooding well comprises a chemical dosing device, a liquid injecting device, an oil well pump, an oil tube, an oil pumping rod and a hollow sliding rod, wherein the oil pumping rod and the hollow sliding rod are arranged in the oil tube. The upper portion of the liquid injecting device is communicated with a chemical dosing pipeline of the chemical dosing device through a tee joint, the lower portion of the liquid injecting device is communicated with the oil pumping rod of a hollow structure, and the lower end of the liquid injecting device is provided with a plug cap in a packaging mode, and a through liquid injecting channel is formed in the liquid injecting device. The oil well pump comprises a pump barrel assembly, a plunger assembly and a fixed valve assembly. The upper end and the lower end of the oil well pump are connected with a thickened oil tube and a tail tube through a coupling and a fixed valve cover respectively. An antiscale device is arranged on the hollow sliding rod in the oil tube, and the antiscale device comprises a scale scraping mechanism and a scale blocking and storing mechanism.

Description

technical field [0001] The invention relates to the technical field of oil exploitation equipment, in particular to an anti-scaling pumping system for three-element compound oil flooding wells. Background technique [0002] At present, for oil fields that have entered the middle and late stages of development, in order to further stabilize crude oil production and improve crude oil recovery, ASP flooding technology is widely used in the process of oil exploitation. Although the application of ASP flooding technology has improved the recovery rate of the oil field, calcium silicate, calcium carbonate, magnesium carbonate and other salt mixed scales will be formed in the oil produced. Scale or sand easily enters the gap between the plunger and the pump barrel, and deposits on the surface of the sucker rod, oil pipe, and oil well pump. Scaling makes the gap between the pump barrel and the plunger gradually smaller, and the plunger of the oil well pump is frequently stuck. , Th...

AI Technical Summary

Problems solved by technology

Although the application of ASP flooding technology has improved the recovery rate of the oil field, calcium silicate, calcium carbonate, magnesium carbonate and other salt mixed scales will be formed in the oil produced. Scale or sand easily enters the gap between the plunger and the pump barrel, and deposits on the surface of the sucker rod, oil pipe, and oil well pump. Scaling makes the gap between the pump barrel and the plunger gradually smaller, and the plunger of the oil well pump is frequently stuck. , the pump inspection cycle is shortened, resulting in a decrease in production efficiency and an increase in cost, which brings great difficulties to oil production operations in the oil field

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