Sand control screen tube includes the inner tube with dense holes, the screen mesh on the tube and the screen mesh with dense holes on the guard tube, its features are: the two ends of the inner tube are set with taper thread, the screen mesh is two layers of inner and outer detail and coarse mesh, the guard tube is provided with longitudinal narrow joints; Two layers of inner tube with thick and fine mesh are wrapped by screen, and the joint edge protruding from the opening joint constitutes the screen joint and the welded fusion joint with the retaining tube. A tube hoop with a longitudinal long hole is arranged at both ends of the tube guard.

Because the inner tube, screen mesh and protective tube are cemented into a whole through suture and hoop welding, the compressive, tensile and torsion strength of the screen are greatly improved, and the service life and sand control reliability of the screen are increased. The thread lengthening connection structure makes the screen light, convenient and flexible for loading and unloading. Is suitable for deep well drilling for oil and gas in the sand control screen, it has a wall with full set taper thread on both ends of the inner tube and a have a vertical slit open the outer tube, the tube is placed between the metal mesh, the mesh of the joint edge in protecting tube bulge of sieve joints and with solid protection pipe welding fusion seam, set on outer protection pipe coupling with vertical long hole.

The sand control screen technology combines sand control with casing reinforcement, prevents casing deformation, reduces cost and increases production. The technology is leading in China. It is suitable for sand control in oil Wells with heavy oil steam injection and severe sand production areas, casing damage recovery Wells, casing damage control Wells and side drilling. The technology has reliable performance, long validity and high economic benefit, which is the main technology to solve the problem of casing damage well sand control.