Double-filtering layer meander circular seam self-cleaning sieve tube
A filter layer and meandering technology, applied in the production of fluids, wellbore/well components, earth-moving drilling, etc., can solve the problems of residual material in the well, large pipe diameter, low permeability, etc., and achieve uniform size of filter cracks , Excellent sand control performance, high filter gap effect
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[0032] Label in the figure
[0033] 1 center cap 101 step face 102 step face
[0034] 2 filter rings
[0035] 201 step surface 202 step surface 203 step surface 204 step surface
[0036] 3 filter rings
[0037] 303 steps 304 steps 305 steps 306 steps
[0038] 4 retaining rings
[0039] 401 conical surface 402 cylindrical surface 405 stepped surface 406 stepped surface
[0040] 5 protective cover 501 inner wall surface
[0041] 6 steps 7 steps 8 steps 9 steps
[0042] 10 steps 11 steps 12 filter slots 13 filter slots
[0043] 14 filter seam 15 transom 16 stepped hole 17 coupling
[0044] 18 thread 19 filter element 20 base tube
[0045] Please refer to figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , the present invention is a self-cleaning screen with double filter layer meandering flow annular seam, which is composed of a filter element 19 and a base pipe 20. The filter element 19 consists of a central cap 1, two filter rings 2, 3, a fixed ring 4, and a...
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