Novel sand control screen pipe with adjustable on-site sand stop precision
A technology of sand control screen and high precision, which is applied in the direction of mining fluid, wellbore/well components, earthwork drilling and production, etc., to achieve good sand retaining performance and improve the effect of sand control
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[0021] like figure 1 and Figure 4 Shown: the novel sand control screen pipe with adjustable on-site sand retaining precision of the present invention mainly consists of five parts. The central tube 2 has a thicker wall, and there are helically distributed through-holes on it, and the edges of the holes are rounded to facilitate fluid confluence and reduce flow resistance. The central tube 2 mainly supports the entire screen tube and oil passage; The fixed-precision sand retaining layer is composed of wire weaving screen 11 and supporting mesh 12, and mainly serves as a spare sand retaining layer and sand control; the adjustable precision sand retaining layer is composed of outer slotted pipe 9 and inner slotted pipe 10 , under the adjustment of the precision adjustment mechanism, the sand retaining precision can be changed, which plays a major role in sand control; the outer protective sleeve 8 has arc-shaped seams punched on it, which mainly protects the internal structure ...
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