The bridge type slot punching screen pipe is composed of a central pipe, a bridge type slot punching sleeve and a stainless steel ring. It has precisely controllable pores, large flow area, high overall strength, strong deformation resistance, excellent corrosion resistance, high reliability, etc.
Product performance characteristics
■ Bridge type flushing filter sleeve
The punching seam can be welded along the axis of the pipe body by straight seam welding; The unique punching seam spiral distribution is formed by spiral welding, which significantly improves the strength of the filter sleeve. When the pressure part is partially squeezed by external force, the gap will be reduced or closed under the action of external force to ensure the reliability of sand control. The precision punching technology is adopted. The punching opening of the stainless steel punching filter sleeve is on the side, reducing the direct erosion of the sand layer on the slotted screen pipe. The processing range of punching gap is 0.20mm-0.7mm. The uniformity of punching gap can ensure that the processing error is within the range of 0.015mm and the requirements for filtering accuracy are met. High density punching technology is adopted, and the effective opening seam length is 3-5 times of that of ordinary slotted pipe and 2-3 times of that of ordinary slotted screen pipe.
■ Unique spiral hole arrangement of central pipe
The center pipe of the bridge type flushing screen pipe adopts standard oil and casing, and the center pipe adopts the spiral drilling form, which reduces the opening area of the cross section of the pipe body. On the basis of ensuring the overall flow area of the pipe body, the strength of the center pipe is retained to the maximum extent. The formation sand is blocked outside the flushing screen pipe, and the oil, gas or water in the formation passes through the flushing gap and then enters the screen pipe through the drilling hole. The way to achieve sand control.
■ Excellent corrosion resistance
The central pipe adopts API standard casing or oil pipe, and the high-density flushing filter sleeve is made of 304 stainless steel.
For special requirements of wells containing H2S, CO2 and high CI, anti-corrosion casing or tubing can be used as the central pipe. The screen pipe is resistant to acid, alkali and salt corrosion.
Scope of application
The screen pipe can be used for various oil, gas and water wells of vertical well, inclined well, horizontal well and other casing completion and open hole completion. It can be used separately as sand control string or used together with filling.