Oil delivering pipeline casing
An oil pipeline and casing technology, which is applied in the field of oil transportation, can solve the problems of affecting the filtering effect, complicated structure of oil well screens, easy deformation of the filtering layer, etc., and achieves the effects of stable filtering effect, simple and practical structure, and convenient downhole operation.
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[0016] as attached figure 1 In the shown embodiment, the present invention is provided with: a central supervisor 2, a screen core pipe 4, an outer sheath pipe 5, the central supervisor 2 is a drilled screen tube type central supervisor with sieve holes drilled in the pipe body section, and the outer sheath The tube 5 is the outer sheath tube of the grooved bridge-type slotted screen tube punched with filter seams on both sides. The drilled screen tube body of the central main pipe 2 is surrounded by three layers of filter core tubes 4 with different diameters. The outside of the filter core tube 4 is connected to the outer sheath tube 5 of the groove bridge type punching screen, and the outer sheath tube 5 of the groove bridge type punching screen and the two ends of the filter core tube 4 are fixedly connected to the joint. The ring 3 and the link ring 3 are fixedly welded on the central main pipe 2 pipe body.
[0017] Further, the outer sheath pipe of the present invention...
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