Sucker rod high-pressure jet flow mechanical rotary brush composite scale removing device and method

Abstract

The invention relates to a sucker rod high-pressure jet flow mechanical rotary brush composite scale removing device and method, and belongs to the field of oil field cleaning. The sucker rod high-pressure jet flow mechanical rotary brush composite scale removing device comprises a front supporting frame, a rear supporting frame and a cleaning spray head, a front fixing frame is installed on the front supporting frame, a rear fixing frame is installed on the rear supporting frame, the inner side of the front fixing frame is movably connected with a rod end fixing and tensioning male connectorthrough a front tensioning connecting short rod, the inner side of the rear fixing frame is movably connected with a rod end fixing and tensioning female connector through a rear tensioning connectingshort rod, a sliding way beam is fixed to the upper portion between the front fixing frame and the rear fixing frame, a hydraulic motor is fixedly installed in the circular protection sleeve, and a cleaning nozzle is fixedly mounted at the front part of the hydraulic motor. According to the sucker rod high-pressure jet flow mechanical rotary brush composite scale removing device and method, the mechanical scale removing advantage and the jet flow scale removing advantage are organically combined, the torque is large during mechanical scratching, cracks are likely to be generated, the rupturestress concentration effect is formed, the high-pressure jet flow is high in deepening capacity, the reverse crushing effect from inside to outside is generated, the speed is high, and the efficiencyis high.

Description

technical field [0001] The invention belongs to oilfield cleaning, high-pressure jet, hydraulic motor, fracture mechanics, etc., and in particular relates to a high-pressure jet mechanical rotary brush composite cleaning device and method for sucker rods. Background technique [0002] In order to improve the recovery of oil layers in the late stage of mature oilfields, after primary oil recovery with natural energy and secondary oil recovery with water injection, tertiary oil recovery is mostly used to inject polymers, alkalis and surfactants into the oil layers to improve oil displacement efficiency. Due to the high viscosity of the polymer, the easy scaling of alkali, and the large amount of sand flowing into the wellbore caused by high-pressure oil displacement, the rods, pipes, and pumps of the oil well are massively fouled and blocked, reducing the pump inspection cycle and increasing the workload. The frequency of replacement has also increased substantially, and maint...

AI Technical Summary

Problems solved by technology

Due to the high viscosity of the polymer, the easy scaling of alkali, and the large amount of sand flowing into the wellbore caused by high-pressure oil displacement, the rods, pipes, and pumps of the oil well are massively fouled and blocked, reducing the pump inspection cycle and increasing the workload. The frequency of replacement has also increased significantly, and the maintenance cost has risen sharply

At present, the common measures after rod tube pump fouling and blockage: stop the well operation, take out the rod tube pump and transport it back to the maintenance workshop of the base, clean, descale and repair it. The cycle is long and the cost is high; the chemical immersion cleaning method occupies a large space, the immersion cycle is long, and the pollution discharge is large; while the high-pressure jet method has made great progress, but requires a high high-pressure water jet pressure, which affects the performance and quality of high-pressure equipment High requirements, high equipment cost, high operation and maintenance costs

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