Well bore automatic descaling device and descaling method thereof

Abstract

The invention discloses an automatic descaling device for a shaft, which comprises a pump casing (1), a pump body, a mandrel (3), a fluid inlet head (4), a rubber cartridge (5), a joint (6), an impeller (7) and The scraper device, the mandrel (3) is fixedly connected with the pump body, the impeller (7) and the blade wheel (11) are installed at intervals on the mandrel (3), the scraper device is installed on the outer circumference of the blade wheel (11), and the fluid enters The head (4) and the rubber cartridge (5) are connected to the water inlet end of the mandrel (3), and the water outlet end of the pump casing (1) is sequentially connected to the pressure control valve (17) and the joint (6); the descaling method is also disclosed . The beneficial effects of the present invention are: realize the utilization of downhole gas-liquid kinetic energy into the working mechanical energy of the descaling device, achieve automatic descaling effect, shorten the descaling time; realize two descaling methods of high-speed gas-liquid descaling and mechanical descaling combination.

Description

technical field [0001] The invention relates to an automatic descaling device and a descaling method thereof, which utilize downhole gas-liquid power converted into descaling power of the descaling device. Background technique [0002] Scaling in oil and gas wells will reduce the flow interface in the process of gas-liquid lifting, increase its flow resistance, reduce the recovery rate, affect the normal development of oil and gas wells, and even block the wellbore, causing oil and gas wells to fail. discontinued. At present, descaling technologies mainly include chemical descaling and mechanical descaling, among which the effect of mechanical descaling is more obvious. However, the mechanical descaling method at the present stage has the following disadvantages: the outer diameter of the scraper blade is fixed, which often makes it difficult to lower the descaling device, and cannot be lowered into the place where the scaling is more serious; Live; the energy consumption ...

AI Technical Summary

Problems solved by technology

However, the mechanical descaling method at the present stage has the following disadvantages: the outer diameter of the scraper blade is fixed, which often makes it difficult to lower the descaling device, and cannot be lowered into the place where the scaling is more serious; Live; the energy consumption brought by the machinery is serious, and ground power equipment is required to provide the downhole descaling power of the wax scraper; because descaling requires complex processes, the entire descaling cycle takes a long time; the operation of the entire descaling system equipment is complicated, giving Descaling brings operational complexity; due to the above reasons, the descaling effect cannot meet expectations, etc.

Images