Method for processing trapezoid slit sieve tube by adopting rolling treating device

Abstract

The invention provides a method for processing a wide slit sieve tube into a narrow trapezoid slit sieve tube by rolling process treatment, comprising the following steps of: applying a reasonable rolling control program as the basic guarantee of processing high-quality trapezoid slit sieve tubes; overhauling machine tools, regulating parameters, cutting processing and finally processing a jackettube into the trapezoid slit sieve tube by rolling treatment. The invention has the effects that a rectangular slit sieve tube processed by a milling machine is treated into the trapezoid slit sieve tube (can reach less than 0.1 mm) of an expanding slit by rolling, thereby reducing the resistance of oil / water penetrating a slit and avoiding grits blocking off the slit, and further, the oil / water yield of an oil / water well is increased. In the process of rolling treatment, equipment has higher stability and rigidity and higher degree of automation, which are the essential conditions of processing, thereby ensuring that the outside diameter dimension precision, the ovality and the surface quality of the trapezoid slit sieve tube meet the demands of product quality standard.

Description

technical field [0001] The invention relates to a screen pipe processing method, which is a processing method for processing a trapezoidal seam screen pipe by using a rolling processing device. Background technique [0002] The screen pipe is a special pipe installed at the lower end of seamless or welded steel well pipes such as oil wells, water wells, geothermal wells, and salt water wells to separate the mined liquid from the sand in the formation. Due to the basic structural characteristics of the strata involved, the size of the sand and gravel in contact with it, and the viscosity of the mining liquid, the size and shape of the holes and slots required for the screen are also different. The traditional one set of drilling, casing running, blasting and perforating drilling technology can no longer meet the needs of modern drilling technology with high efficiency and high recovery rate in complex terrain. Screen pipes have been widely used in underground liquid drilling...

AI Technical Summary

Problems solved by technology

The original horizontal wells used mechanical and laser methods to process rectangular screens, but due to the problem of permeability and the easy formation of "sand walls", they could not fully meet the requirements of use.

Although the trapezoidal seam screen produced by mechanical and laser processing can overcome some difficulties, it is greatly affected by the blade and equipment and is not easy to promote. This has become a difficult problem in the screen production industry.

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