CN105221118A

CN105221118A - A kind of novel foam metal sand-proof pipe

Info

Publication number: CN105221118A
Application number: CN201510770140.1A
Authority: CN
Inventors: 汪伟
Original assignee: China University of Petroleum Beijing
Current assignee: China University of Petroleum Beijing
Priority date: 2015-11-13
Filing date: 2015-11-13
Publication date: 2016-01-06

Abstract

The present invention relates to a kind of novel foam metal sand-proof pipe, this sand-proof pipe is used for oil gas field underground sand control, its structure comprises from outer successively toward interior: outer tube protective sleeve, the anti-layer of sand of foam metal, wrapping wire support bar, base tube, the anti-layer of sand of described foam metal there is the flow guiding slit of staggered cloth seam, flow guiding slit is the trapezoidal seam of outer narrow inner width, described wrapping wire support bar is welded on outside base tube, containing parallel water conservancy diversion through hole on described base tube, each water conservancy diversion through hole is located in the middle of two wrapping wire support bars, the minimum filter diameter of the anti-layer of sand of foam metal reaches 0.05mm, its thickness is 0.5-1cm, wide >=the 0.1mm of the narrowest place's seam of flow guiding slit, the permeability of foam metal is good, intensity is high, the flow guiding slit of outer narrow inner width has self-cleaning function simultaneously, this sand-proof pipe substantially increases sand control precision and application life, there is good flow conductivity, effective raising fluid flow.

Description

A kind of novel foam metal sand-proof pipe

Technical field

Patent of the present invention belongs to oil and gas field, is specifically related to a kind of novel foam metal sand-proof pipe.

Background technology

Because geologic(al) factor and exploitation reason can make the sand in oil reservoir and oil, gas together flow in well in oil recovery process, shaft bottom will result in blockage, mechanical sand control method is widely used at present for this situation oil field, namely sand-proof pipe is laid at oil reservoir position, sand-proof pipe conventional at present has slotted liner, wire-wrapped screen, multiple layer metal net to be wound around composite screen pipe etc., following shortcoming is there is: permeability is low through investigating these sand-proof pipes, cause flow conductivity poor, effectively cannot improve fluid flow, increase oil production, and filtering accuracy is not high enough, application life is not long.

Through investigation, current foam metal is due to special stereoscopic three-dimensional structure, make its void ratio surface area large, through hole is high, the characteristics such as porosity is high, and pore structure is even, have many performances differing from conventional filter material that has, use in a large number in industries such as filtrations, but in petroleum industry oil field sand prevention application also less.But find that when carrying out sand control experiment most of sand grains is all deposited on its surface, liquid outlet quantity is caused to decline, and can there is a certain amount of sand production rate to ensure suitable Discharge rate in regulation in oil field sand prevention specification, draw it is because the high strength of foam metal and special internal construction cause the sand grains being less than foam metal anti-layer of sand sand block precision also cannot pass even if analyze, cause permeability sharply to decline.

Therefore in conjunction with the advantage of traditional sand-proof pipes such as slotted liner and novel foam metal, and reduce its problem of producing of shortcoming separately, have developed a kind of novel foam metal sand-proof pipe, use for oil gas field field sand control.

Summary of the invention

The object of patent of the present invention is: for Oil Field sand control provides a kind of novel sand-proof pipe, in conjunction with sand block performance and the flow conductivity of foam metal excellence, make it have self-cleaning function simultaneously, ensureing the basis that sand block requires improves oil field Discharge rate and application life greatly.

For achieving the above object, the technical scheme that patent of the present invention adopts is:

A kind of novel foam metal sand-proof pipe, its structure comprises from outer successively toward interior: outer tube protective sleeve, the anti-layer of sand of foam metal, wrapping wire support bar, base tube, described outer tube protective sleeve is damaged by external force for the protection of the anti-layer of sand of foam metal, the anti-layer of sand of described foam metal there is the flow guiding slit of staggered cloth seam, make like this via fluid matasomatism, by flowing interference, the granule sand grains of the anti-layer of sand surface deposition of foam metal is flowed away by flow guiding slit, reduce the danger that the anti-layer of sand of foam metal is blocked by granule sand grains, described flow guiding slit is the trapezoidal seam of outer narrow inner width, this outer narrow inner width type mode makes the sand grains in seam get rid of, be unlikely to block gap, be provided with self-cleaning function, described wrapping wire support bar is welded on outside base tube, wrapping wire support bar supports the anti-layer of sand of foam metal, reduce liquid flow resistance area simultaneously, add the flow conductivity of this sand-proof pipe, containing parallel water conservancy diversion through hole on described base tube, each water conservancy diversion through hole is located in the middle of two wrapping wire support bars, the minimum filter diameter of the anti-layer of sand of described foam metal reaches 0.05mm, its thickness is 0.5-1cm, wide >=the 0.1mm of the narrowest place's seam of flow guiding slit, the minimum filter diameter of foam metal, the seam of thickness and flow guiding slit is wide dissimilar selection, make to adjust accordingly to reach best sand controlling result according to different regions and sand control requirement.

The beneficial effect of patent of the present invention:

As can be seen from above-mentioned technical scheme, a kind of novel foam metal of the one that patent of the present invention provides sand-proof pipe, this sand-proof pipe flow conductivity is strong, and sand control precision is high, greatly improves sand control ability, meets the sand control requirement in oil field.

Accompanying drawing explanation

Fig. 1 is the main pseudosection of patent of the present invention;

Fig. 2 is patent side cutaway view of the present invention;

Fig. 3 is the anti-layer of sand front view of foam metal in patent of the present invention;

In figure: the anti-layer of sand 2 of outer tube protective sleeve 1, foam metal, wrapping wire support bar 3, base tube 4, water conservancy diversion through hole 5, flow guiding slit 6.

Detailed description of the invention

As shown in Figure 1, Figure 2 and Figure 3; for the anti-layer of sand front view of foam metal in the main pseudosection of patent of the present invention, side cutaway view and patent of the present invention, it comprises outer tube protective sleeve 1, the anti-layer of sand 2 of foam metal, wrapping wire support bar 3, base tube 4, water conservancy diversion through hole 5, flow guiding slit 6.The feature of patent of the present invention is; its structure comprises from outer successively toward interior: the anti-layer of sand of outer tube protective sleeve, foam metal, wrapping wire support bar, base tube; the anti-layer of sand of described foam metal there is the flow guiding slit of staggered cloth seam; flow guiding slit is the trapezoidal seam of outer narrow inner width; described wrapping wire support bar is welded on outside base tube; containing parallel water conservancy diversion through hole on described base tube, each water conservancy diversion through hole is located in the middle of two wrapping wire support bars.

The undeclared part related in patent of the present invention is same as the prior art or adopt prior art to be realized.

Claims

1. a novel foam metal sand-proof pipe, its structure comprises from outer successively toward interior: outer tube protective sleeve (1), the anti-layer of sand of foam metal (2), wrapping wire support bar (3), base tube (4), the anti-layer of sand of described foam metal (2) there is the flow guiding slit (6) of staggered cloth seam, flow guiding slit (6) is the trapezoidal seam of outer narrow inner width, described wrapping wire support bar (3) is welded on base tube (4) outside, described base tube (4) is upper containing parallel water conservancy diversion through hole (5), each water conservancy diversion through hole (5) is located in the middle of two wrapping wire support bars (3).

2. device according to claim 1, is characterized in that: the minimum filter diameter of the anti-layer of sand of described foam metal reaches 0.05mm, and its thickness is 0.5-1cm.

3. device according to claim 1, is characterized in that: the wide >=0.1mm of the narrowest place's seam of described flow guiding slit.