RE: 7 inch slotted casing6 Aug 2024 16:00
Does this help at all?
"Slotted Casing
Slotted casing pipe is a method of cutting multiple longitudinal or spiral straight-arranged and staggered slits of certain specifications on oil casing or tubing in various ways. It is made by using a special ultra-thin cutting sheet and beam cutting, with a slit width (0.2-0.5mm). The cross-sections of the seams are rectangular, trapezoidal (trapezoid angle is 3-8 degrees) and special shapes (round holes), etc., which can ensure the permeability of 0.5%-10%. The layout of the seams can be processed according to user requirements.
Product features of slotted casing:
1. Slotted casing is suitable for sand control in sand wells with a sand particle size greater than 0.3mm.
2. The edge of the slotted casing has good verticality, the cutting edge is smooth and burr-free, and the cutting seams are even.
3. The flow area is large, the 27/8" screen tube has 300 slits/1.5m, which is 2.4 times larger than the flow area of oil pipes of the same specification.
4. The overall performance stabilization treatment improves the corrosion resistance and performance of the slotted casing, which can extend its underground working life.
5. The slotted casing is made of J55 or N80 petroleum casing body, which has good strength and is not easy to deform.
6. The inner diameter of the slotted casing is large, making it easy to configure the pipe string."
source: baowi-steel