Slit type 00Cr9MoNi alloy steel sand prevention pipe

Abstract

The invention discloses a slit type 00Cr9MoNi alloy steel sand prevention pipe. The slit type 00Cr9MoNi alloy steel sand prevention pipe comprises a sand prevention pipe body and sand filter slits; the slit type 00Cr9MoNi alloy steel sand prevention pipe is characterized in that the sand prevention pipe body is in a round pipe shape and is manufactured by adopting a 00Cr9MoNi alloy steel material, the sand prevention pipe body is provided with trapezoid sand filter slits in sections, the trapezoid sand filter slits have small outer openings and big inner openings which are cut by a laser gun from the outer circumference to the inner circumference, the distance between every two sections is 30-50mm, the width of the outer opening of each section of trapezoid sand filter slit which is 3-5m in length is 0.05-0.30 mm, the thickness of the outer opening of each section of trapezoid sand filter slit is 0.3-0.5mm, and two end parts of the sand prevention pipe body are provided with taper pipe male threads. The slit type 00Cr9MoNi alloy steel sand prevention pipe disclosed by the invention is manufactured by adopting the 00Cr9MoNi alloy steel material, corrosion resistance and scouring resistance are obtained, the service life is long, the well repairing period is prolonged, and the production time rate of an oil well is increased; the outer openings of the sand filter slits are small and thin, the inner openings of the sand filter slits are big, fine sand does not easily enter the sand filter slits, sand is unlikely to store, the blocking is unlikely to cause, the structure of the slit type 00Cr9MoNi alloy steel sand prevention pipe is simplified, the removal is convenient, the operation construction is convenient, and the sand prevention efficiency and the construction efficiency are increased.

Description

technical field [0001] The invention relates to a slit-type 00Cr9MoNi alloy steel sand control pipe used in oil field development, which solves the problems of low sand control efficiency, easy gambling and oil corrosion of the currently used sand control pipe. Background technique [0002] The oil well sand control structure currently in use in the oil field is that the first layer is a wire-wound sand control pipe, the second layer is a medium sand particle filter belt, and the third layer is a coarse sand particle filter belt. The oil enters the sand control pipe through the coarse sand particle filter belt, the medium sand particle filter belt and the casing. Because the pressure difference between the oil layer and the sand control pipe is too large, the fine sand can also enter the wire wrapping layer of the sand control pipe with the oil. Due to the dense multi-layer winding wire, the viscosity of the oil and the corrosion structure of the water, the sand control pipe...

AI Technical Summary

Problems solved by technology

Because the pressure difference between the oil layer and the sand control pipe is too large, the fine sand can also enter the wire wrapping layer of the sand control pipe with the oil. Due to the dense multi-layer winding wire, the viscosity of the oil and the corrosion structure of the water, the sand control pipe is blocked and damaged. If the sand control pipe is damaged, the cycle of replacing the sand control pipe is extremely short, so that the production rate of the oil well is extremely low, which seriously restricts the ultimate recovery of the oil well

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