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Self-cleaning sand prevention pipe

A sand control tube and self-cleaning technology, which is applied in the field of gas well sand control and oil well, can solve the problems of low filtration efficiency of sand control tube and easy damage of sand control tube, achieve good self-cleaning effect, increase stress stability, pressure bearing capacity and efficiency Improved effect

Inactive Publication Date: 2013-10-09
陈爱民
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a self-cleaning sand control pipe to solve the problem that the existing sand control pipe is easily damaged
The present invention also solves the problem of low filtration efficiency of existing sand control pipes

Method used

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  • Self-cleaning sand prevention pipe
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  • Self-cleaning sand prevention pipe

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Embodiment Construction

[0035] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.

[0036] Such as figure 1 and figure 2 As shown, the self-cleaning sand control pipe tool according to the embodiment of the present invention includes: a base pipe 1; an annular outer protective cover 6 sleeved outside the base pipe; image 3 , a plurality of filter cores 3 are radially arranged in parallel in the annular space 60 between the base pipe 1 and the outer protective cover 6, as Figure 6 , Figure 10 , each of the filter cores has an inner cavity 35, and the inner cavity of each of the filter cores communicates with the inner cavity of the base pipe.

[0037] A mounting hole 5 is provided on the surface of the base pipe 1 for mounting with the connector 4 . The position and number of the mounting holes 5 correspo...

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Abstract

The invention provides a self-cleaning sand prevention pipe which comprises a base pipe, an outer protection cover and a plurality of filtering elements, wherein the outer protection cover is sleeved outside the base pipe; the filtering elements are radially arranged in parallel in an annular space between the base pipe and the outer protection cover; each filtering element is provided with an inner cavity; and the inner cavity of each filtering element is communicated with an inner cavity of the base pipe. The surface area of a single filtering element is far smaller than the filtering surface area of a sand prevention pipe in the prior art, and then the mechanical force borne by a single filtering element is greatly reduced, thus the pressure difference resistance of the filtering element is greatly improved, and the cleaning of high-pressure water flow on the ground can be borne.

Description

technical field [0001] The invention relates to the technical field of oil well and gas well sand control, in particular to a self-cleaning sand control pipe tool. Background technique [0002] The current sand control pipe wraps or sets the filter material on the outer diameter of the central pipe in a cylindrical shape with the central pipe as the center, the inner diameter is larger than the outer diameter of the central pipe, and the outer diameter is smaller than the inner diameter of the outer protective cover. During the gas extraction process, rock particles of different particle sizes in the formation flow out of the formation together with the formation output, sand particles smaller than the filter material gap pass through, and sand particles larger than the filter material gap are blocked, and the blocked sand particles accumulate outside the filter material. And combined with the colloid in the formation output to form mud, blocking the gaps in the screen filte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/08
Inventor 张爱绯马龙陈爱民
Owner 陈爱民