Automatic descaling device and method for shafts

Abstract

The invention discloses an automatic descaling device for shafts. The automatic descaling device comprises a pump shell (1), a pump body, a mandrel (3), an inflow head (4), a rubber sleeve (5), a connector (6), impellers (7) and scraper devices. The mandrel (3) is fixedly connected with the pump body. The impellers (7) and blade wheels (11) are mounted on the mandrel (3) at intervals. The scraper devices are mounted on the outer peripheries of the blade wheels (11). The inflow head (4) and the rubber sleeve (5) are communicated with the water inlet end of the mandrel (3). The water outlet end of the pump shell (1) is sequentially connected with a pressure control valve (17) and the connector (6). The invention further discloses a descaling method. The automatic descaling device and method has the advantages that downhole gas-liquid kinetic energy is converted into operation mechanical energy of the descaling device so as to achieve automatic descaling, descaling time is shortened, and combination of high-speed gas-liquid descaling and mechanical descaling is achieved.

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.

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