Integral self-cleaning sieve tube of V-shaped joint filter

Abstract

The invention relates to an integral V seam filter self-cleaning sieve tube, which consists of a base tube and a filter, wherein the filter consists of a filtering core and a protecting cover, and the filtering core consists of a central column, a plurality of filtering rings and a fixing ring; all the filtering rings are coaxially nested together, and the central column is embedded in the filtering ring having the smallest inner diameter; the fixing ring is sleeved outside the filtering ring having the largest inner diameter, and the shape of the fixing ring corresponds to the shape of the filtering ring having the largest inner diameter; the central column, the filtering rings and the fixing ring are connected by a plurality of reinforcing ribs, and the reinforcing ribs are radially equispaced outwards by taking the central column as a center; the outer wall surface of the central column and the outer wall surfaces of all the filtering rings are inverted conical surfaces; the inner wall surface of all the filtering rings and the inner wall surface of the fixing ring are straight surfaces; and the protecting cover is covered on the upper part of the fixing ring, and the top surface of the protecting cover is provided with a plurality of louver windows. The integral V seam filter self-cleaning sieve tube has the advantages of strong deformation resistance, stable sizes of filter seams, high precision of baffle sand, high permeability and jam resistance.

Description

Technical field [0001] The invention relates to a mechanical sand control device used in crude oil exploitation in the petroleum industry, in particular to a sand control screen. Background technique [0002] At present, the oil and gas industry generally uses sand control screens for downhole sand control. The fine silt with a diameter of formation sand particles less than 40 microns is produced on the ground with the oil and gas flow. Otherwise, these fine silt particles will block the downhole permeability and sand control system, and cause Oil well production is reduced. [0003] The sand control screen is composed of a base tube and a filter element. The filter element is composed of multiple separable parts assembled together. Its disadvantages are complex structure, troublesome assembly, difficult positioning, low strength, easy deformation after being squeezed, and cannot be prevented. Fine silt, low permeability, poor sand retaining accuracy, easy to block. Summary of t...

AI Technical Summary

Problems solved by technology

[0002] At present, the oil and gas industry generally uses sand control screens for downhole sand control, and the fine silt with a particle size of less than 40 microns in the formation is produced on the ground along with the oil flow. Otherwise, these fine silt particles will block the permeability and sand control system of the downhole, and cause Lower well production

[0003] The sand control screen consists of a base pipe and a filter element. The filter element is assembled from multiple separable parts. Its disadvantages are complex structure, troublesome assembly, difficult positioning, low strength, and easy deformation after extrusion. Fine silt, low permeability, poor sand retaining accuracy, easy to clog

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