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Sand-proof tube for oilfield

A technology for sand control pipes and oil fields, which is applied in the fields of production fluids, wellbore/well components, earthwork drilling, etc. The effect of improved safety performance

Inactive Publication Date: 2007-12-05
金伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems of poor oil seepage, short service life and high cost in existing sand control pipes, the present invention provides a sand control pipe with simple structure, which can greatly improve oil seepage efficiency, reduce cost and increase service life at the same time

Method used

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  • Sand-proof tube for oilfield

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specific Embodiment approach 1

[0005] Specific embodiment 1: Referring to Fig. 1 and Fig. 2, this embodiment is an oil field sand control pipe, which includes an inner pipe 1, an outer pipe 2, and a net sleeve 3 arranged between the inner pipe 1 and the outer pipe 2, and the outer pipe 2 Clamps 5 are installed at both ends of the inner tube 1, and a slat 4 is axially fixed on the outer wall of the inner tube 1, and a net cover 3 is arranged on the outside of the slat 4, and the inner surface of the net cover 3 and the outer surface of the slat 4 The distance h is 1-2 mm, and the gap between the mesh sleeve (3) and the outer pipe (2) is 1-2 mm. Appropriate gaps are left between the net sleeve and the slats 4 and the outer tube. This gap allows the net sleeve to have free rotation space. This space for the net sleeve to rotate will make the net sleeve clamp on the net during the vibration process. The sand and gravel in the casing are removed, thereby avoiding the blockage of the mesh casing in a large area a...

specific Embodiment approach 2

[0006] Specific embodiment two: with reference to Fig. 3, the slats 4 of the present embodiment are evenly distributed on the outer wall circumference of the inner tube 1, the upper surface 4-1 of the slats 4 is a circular arc surface, and the lower surface of the slats 4 is in line with the inner wall. The outer wall of the tube 1 is adapted to the arc surface. The lower surface of the slat 4 is set as an arc surface adapted to the outer wall of the inner tube 1, which can ensure that the connection between the slat 4 and the inner tube is more firmly; the upper surface of the slat 4 is set as an arc surface, which can avoid During the vibration process, the mesh sleeve rubs against the slats and the mesh sleeve is damaged, thus ensuring the service life of the mesh sleeve.

specific Embodiment approach 3

[0007] Embodiment 3: Referring to FIG. 4 , the cross section of the slat 4 in this embodiment is rectangular, and the lower surface of the slat 4 is compatible with the outer wall of the inner tube 1 . The lower surface of the slat 4 is adapted to the outer wall of the inner pipe 1, which can ensure a firm connection between the slat and the inner pipe; under the condition that the mesh cover does not rub against the slat, the slat with a rectangular cross-section has the advantages of convenient processing. , The advantages of saving processing time.

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Abstract

A sand control pipe relating to filter device used in oil field includes inner pipe, external pipe and net sleeve, wherein the external pipe having keeper, wall of inner pipe having strip, diameter of net sleeve is 1-2mm less than inner diameter of external pipe. Said invention has rotation space between strip and external pipe, which can eliminate sand and stone held in net sleeve avoiding being blocked, to raise clued oil permeability, prolong service life of sand control pipe and reduce cost.

Description

technical field [0001] The invention relates to a filtering device used in an oil field, in particular to a sand control pipe used on an oil pipe. Background technique [0002] Most of the existing sand control pipes are wrapped with fiber sand control mesh on the outer wall of the inner pipe. Since the sand control mesh is directly wound and wrapped on the outer wall of the inner pipe, this has the disadvantage of poor oil seepage, which affects the oil seepage efficiency; there are also sand control pipes It is to lay multi-layer stainless steel wire fine sand mesh on the inner and outer pipe walls, and then fill the middle of the inner and outer pipes with gold steel sand. Although this kind of sand control pipe can filter fine sand particles well, but because of its high cost, there are still some problems in use. The disadvantage of short life is so unfavorable for popularization and application; ZL02275497.0 discloses a convex rib type sand control pipe for oil product...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/08
Inventor 金伟
Owner 金伟
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