High precise punched slotted Screen is composed of central tube, precise punched slotted screen cover and stainless steel ring. It has characteristics of exquisite controlled hole, high percentage of open area, strong integral strength, resistance to deformation, excellent resistance to corrosion and high reliability etc.

precise punched slotted Screen cover can adopt line seam welding along axial direction of tube or helical welding mode to enhance strength of filtering cover greatly. Aperture can be decreased or closed by compressing parts with external force during local extrusion to guarantee reliability of sand control. It shall adopt precise punching technique. Side punching opening of stainless steel precise punched slotted screen cover can reduce direct erosion effect of sand bed. Punching aperture is from 0.20mm to 1.00mm. Machining error scope can be controlled within 0.015mm which can guarantee requirements of filtering precision. It adopts high-density punching technique. Effective opening slot length is three to five times of length of ordinary slotted tube and two to three times of length of ordinary caulking screen.

High-density screen pipe joints at the center of the use of standard oil pipe, casing, the center hole in the form of spiral pipe used to reduce the cross-section of the pipe-size holes in the tube to ensure that the overall flow area on the basis of the control center so that the intensity To maximize the reservation. Stratum of sand blocked in the red screen pipe joints, the formation of oil, gas or water after a red seam gap, and then, after drilling holes into the sieve tube inside. Achieve sand.
Central tube of high-density precise punched slotted screen adopts standard oil tube and casing. Central tube adopts helical perforation form to reduce aperture area of tube cross section and retain central tube strength as much as possible on basis of guarantee of tube passage integral area . Sand shall be blocked out of punching screen. oil, gas or water in stratum can pass punching aperture and perforation on central tube to enter into screen to achieve sand control purpose
Excellent anti-corrosive performance
Central tube adopts API standard casing or oil tube. Precise punched slotted screen cover adopts stainless steel 304.

contain H2S, CO2, high-Cl-wells of the special requirements, the center pipe can be corrosion-resistant casing or tubing. Screen acid, alkali and salt corrosion

Screen can be used in vertical wells, deviated, horizontal well completion, such as casing and open hole completion of the various types of oil, gas, water, sand as a single string, can also be used gravel packing.