Well cleanout shunt

Abstract

A well direct-washing current divider consist of an outer sleeve 1, a piston 2, a shear pin 3, an O-shaped seal ring 4, a seal joint 5, a valve hood 6, a valve seat 7, a valve ball 8, a sewing wire, a spring sleeve 10, a spring 11, a current dividing joint 12 and a lower joint 13. As the well direct-washing current divider is fixed on the inner space at the upper part of the seal joint by the shear pin through the piston, the valve ball is arranged on the lower surface of the valve seat in the middle of the sewing wire, the lower surface of the valve ball is the spring sleeve which can slide longitudinally and the lower end of the spring sleeve is the spring; when washing directly, a well-washing liquid floating from a pump flows into the valve hood through the inner hole of the seal joint to open the valve ball and then flows into the well washing channel of a shunting joint through an annular flow passage between the sewing wire and the spring sleeve and enters into the annular space of an oil tube and a bushing as well as returns to the ground finally. When the oil is pumped, the valve ball is closed under the effect of the spring; the liquid in the annular space of the oil tube and the bushing can not enter into an oil pumping tubing string, thus preventing the well washing liquid from leaking into an oil layer, improving the well washing quality and shortening the operation time. The well direct-washing current divider of the invention is reasonably designed, conveniently used, stably works and is very suitable for being popularized and applied on spot.

Description

Technical field: [0001] The invention relates to a downhole tool used in oil field production, in particular to a positive flushing diverter. Background technique: [0002] Heavy oil wells need to be regularly hot-washed to remove wax and impurities in the pump that affect the work of the pump valve. Usually, when backwashing is used, part of the heat of the well-washing fluid is directly transferred to the direction of the casing, and the loss is serious. The amount of well-washing fluid is large and the well-washing It takes a long time; for oil wells with low reservoir pressure, when backwashing the well, a large part of the well flushing fluid leaks into the reservoir without entering the pump, and this large part of the well flushing fluid will cause serious damage to the reservoir due to poor compatibility with the reservoir; for special The well must be tripped and tripped multiple times, which increases operating costs. Invention content: [0003] The purpose of t...

AI Technical Summary

Problems solved by technology

[0002] Heavy oil wells need to be regularly hot-washed to remove wax and impurities in the pump that affect the work of the pump valve. Usually, when backwashing is used, part of the heat of the well-washing fluid is directly transferred to the direction of the casing, and the loss is serious. The amount of well-washing fluid is large and the well-washing It takes a long time; for oil wells with low reservoir pressure, when backwashing the well, a large part of the well flushing fluid leaks into the reservoir without entering the pump, and this large part of the well flushing fluid will cause serious damage to the reservoir due to poor compatibility with the reservoir; for special The well must be tripped and tripped multiple times, which increases operating costs

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