Novel hydraulic jet unblocking device

Abstract

The invention belongs to the technical field of oil-water well casing descaling, and particularly relates to a novel hydraulic jet unblocking device. The novel hydraulic jet unblocking device comprises a filter, a short pipe, a barrel, a motor, a reciprocating motion mechanism and a rotating disc, wherein the filter and the barrel are fixedly connected to the upper end and the lower end of the short pipe respectively, the motor is fixedly installed in the barrel through a motor support, the power input end of the reciprocating motion mechanism is connected with an output shaft of the motor, and the power output end of the reciprocating motion mechanism is fixedly connected with the rotating disc. According to the device, compared with the prior art, a brand-new descaling and unblocking mode, and the device has the advantages of simple construction process, low construction cost and large treatment depth; and meanwhile, an emulsifier is rotationally sprayed, so that jet flows of the emulsifier impact scales on the inner wall of a casing in the radial direction and the tangential direction, the scales are easier to remove, and a descaling effect is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of descaling of oil and water well casings, and in particular relates to a novel hydraulic jet plugging removal device. Background technique [0002] Pollution and mechanical impurity precipitation in the process of drilling, well completion, downhole operation, long-term oil recovery and water injection, and deposition of drilling fluid and bituminous colloidal salts make the pore channel blockage in the near wellbore area very serious; some heavy oil wells Long-term exploitation leads to a decrease in the content of light components and an increase in the content of heavy components in crude oil, resulting in a significant increase in the viscosity of crude oil; heavy oil and dirt in the wellbore and near the wellbore are very easy to block the borehole and reservoir channels. The level of cleaning and plugging removal determines the effect of oilfield development, and also determines the length of oilfiel...

AI Technical Summary

Problems solved by technology

For example, the construction is complex, the cost is high, the physical effect is single, limited by the downhole conditions, the energy generated is limited, and the treatment depth is small, etc.

When the oilfield enters the middle and late stage of development, due to water injection and other storage factors, the perforated blastholes of the oil and water wells and the pore channels in the near wellbore area are relatively easy to block, which leads to the production reduction of the oil well and the decrease of the water absorption of the water well, which greatly affects the oilfield. development level

[0004] When the oilfield enters the middle and late stage of development, due to water injection and other storage factors, the perforated blastholes of the oil and water wells and the pore channels in the near wellbore area are relatively easy to block, which leads to the production reduction of the oil well and the decrease of the water absorption of the water well, which greatly affects the oilfield. development level

These bad conditions inevitably lead to a decrease in the permeability of the near-wellbore area, resulting in a decrease in oil production and water injection or even a shutdown

However, ordinary pickling and other measures can only solve the pollution problem of the wellbore and the limited distance around the wellbore

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