Sieve tube with novel internal support sleeve and method for producing the same

Abstract

The invention discloses a sieve vessel with an internal supporting sleeve, which belongs to the field of petroleum extraction. The sieve vessel comprises a parent tube. The top of the parent tube is provided with a supporting ring. The inner supporting casing and an external supporting casing are installed via the supporting ring. A pipe seam between the parent tube and the inner supporting casing is a diversion layer gap. A sand-prevention net is arranged between the inner and the external supporting casings. The outer sleeve of the external supporting casing is provided with a punched chink sleeve. The inner supporting casing is evenly provided with fractures. The inner supporting casing is folded into one or a plurality of folded layers that are arranged between the inner supporting casing and the parent tube through the fracture to the diversion layer gap. A processing method is that the fracture on the top circle of the inner supporting casing punched by a pressing machine bends inwards to form the folded layer. The sieve vessel uses the folded layer to enlarge the diversion layer gap between the inner supporting casing and the parent tube by the folded layer arranged between the inner supporting casing and the parent tube. In addition, the diversion layer gap does not vary with the increasing of external pressure. So the sieve vessel has the effects of reducing the flowing friction of the diversion layer gap in the process of oil extraction and improving the oil production of a well.

Description

technical field [0001] The invention relates to a screen pipe used in the field of oil exploitation and a preparation method thereof, in particular to a screen pipe with a novel inner support sleeve used in the field of oil exploitation and a preparation method thereof. Background technique [0002] In oil extraction operations, screens are used for microporous sand control filtration in the early stage of oil wells, gas wells, horizontal wells and deep water wells. , water well, can be used alone as a sand control string, and can also be used in conjunction with filling. [0003] Such as figure 1 As shown, the existing screen pipe with a standard inner support sleeve includes a base pipe 1, through holes 1-1 are evenly distributed on the base pipe, a support ring 2 is arranged on the top of the base pipe, and an inner support is installed through the support ring The sleeve 4 and the outer support sleeve 6, the inner and outer support sleeves have through holes 4-1, 6-1 a...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved in the present invention is to overcome the defects of existing screen pipes with standard inner support sleeves, and provide a screen pipe with a new type of inner support sleeve and its preparation method, which increases the distance between the inner support sleeve and the base The diversion layer gap between the pipes, and the diversion layer gap does not change with the increase of external pressure, which reduces the flow resistance of oil in the diversion layer gap during oil production, and improves the oil production of the oil well

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