Anti-pressure anti-torsion high-strength V-groove self-cleaning sand-proof screen pipe

Abstract

The invention discloses a pressure and torsion resistance high-strength V groove self-cleaning anti-sand sieve tube which belongs to a petroleum exploitation mechanical anti-sand device. A coupling is connected with a base tube; the base tube is provided with a round through hole along the axial direction; a filter component is fixed in the round through hole on the base tube; the outer diameter of the base tube is provided with a protective tube. The filter component of the invention is welded on the base tube, and then a protective cover is welded on the filter component; next, the filter component is connected with the coupling and access to the lower end of a petroleum pipe to produce the petroleum. In the anti-sand sieve tube of the invention, the filter component with a V groove filter element consisting of a plurality of circular rings with V-shaped gaps is fixed on the tube wall of the base tube, so as to overcome the defects of low strength, high processing difficulty, high cost, etc. Fine sand can be discharged as the petroleum through elastic and vermicular filtering crack and spacing, so that the sand filtering procedure keeps self-cleaning; in this way, the gap size can mostly meet the petroleum production requirements.

Description

technical field [0001] The invention relates to a mechanical sand control device in petroleum exploitation, in particular to a high-strength V-groove self-cleaning sand control screen tube of compression and torsion resistance. Background technique [0002] At present, the mechanical sand control devices for crude oil extraction in the petroleum industry are mainly slotted screens and wire-wrapped screens: [0003] 1. The slotted screen can only be processed with a minimum slot width of 0.25mm at present, so its sand control for fine sand is limited, and the flow area of ​​the slotted screen can only be 1 / 8~1 of the wire-wrapped screen. / 10. In addition, the gaps processed by the slotted screens should not be small on the outside and large on the inside, so the self-cleaning function cannot be achieved, and there will be clogging during the filtration process. The slotting of the slotted screen is directly processed on the base pipe. The base pipe is generally made of carb...

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Problems solved by technology

[0006] In order to overcome the defects of compression resistance, torsion resistance and low strength in the prior art, the purpose of the present invention is to combine the "ring-shaped micro-motion sand control screen with sheath V-groove gap" 200620006991.5 and "a belt with On the basis of the two patents of "ring-shaped peristaltic sand control screen with external thread" 200520017698.4, a compression and torsion-resistant high-strength V-groove self-cleaning sand control screen is proposed

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