CN201377311Y

CN201377311Y - Veneer-type inner ladder-shaped anti-sand sieve tube

Info

Publication number: CN201377311Y
Application number: CN200920009705U
Authority: CN
Inventors: 张德生; 张宏祥; 周长福; 刘权国
Original assignee: LIAONING HUAFU PETROLEUM HIGH-TECH Co Ltd
Current assignee: LIAONING HUAFU PETROLEUM HIGH-TECH Co Ltd
Priority date: 2009-02-17
Filing date: 2009-02-17
Publication date: 2010-01-06
Anticipated expiration: 2019-02-17

Abstract

The utility model discloses a veneer-type inner ladder-shaped anti-sand sieve tube which comprises a foundation tube and a plurality of arc-shaped veneers; the foundation tube is provided with a plurality of openings along the length direction; the curvature and the thickness of the arc-shaped veneers are consistent with those of the foundation tube; the arc-shaped veneers are inlaid in the openings, and the two end surfaces of the arc-shaped veneers and the two end surfaces of the openings are welded together; and more than two inner ladder-shaped sand seams with gaps between the outer surfaces of the foundation tube and the arc-shaped veneers as short sides and with gaps between the inner surfaces of the foundation tube and the arc-shaped veneers as long sides are respectively arranged between both side surfaces of the arc-shaped veneers and both side surfaces of the openings. The veneer-type inner ladder-shaped anti-sand sieve tube can achieve the anti-sand and self-cleaning effect, thereby preventing blockage caused by sand deposition.

Description

Trapezoidal sand control screen in the inserted-blade type

Technical field

Play the mechanical sand control structure of oil-sand centrifugation in the relevant a kind of field produces of the utility model, refer in particular to trapezoidal sand control screen in a kind of inserted-blade type.

Background technology

Sand production is to influence a great problem that oil field production capacity is built.Therefore, sand control technique also is the constantly key subjects of tackling key problem of petroleum science and technology personnel.

At present, sand control technology kind is a lot, successively can be divided into initial sand control and final sand-proofing by completion, can be divided into mechanical sand control and chemical sand control etc. by function.

In mechanical sand control, be divided into coiling screen sand control, cutting seam sieve tube sand control and expandable screen sand control etc. again.The sand seam of the coiling screen casing that uses in the screen sand control of wherein winding the line is the structure of outer sealing width greater than interior seam width, easily obstruction sand grains and lose the sand control effect in the sand seam.In addition, when bending well and horizontal well, screen casing has BENDING PROCESS, under the formation rock squeezing action, can produce the coiling distortion, come off, and often causes down-hole accident.The problem that then has the more complicated of constructing for the expandable screen sand control.As shown in Figure 7, the cutting seam sieve tube sand control is normal use the in existing traditional sand control mode, cutting seam sieve tube in the cutting seam sieve tube sand control is that many vertical masonry joints are directly cut out at the position of setting on parent tube, the outer sealing width that is to say the sand seam is consistent with interior seam width, because this cutting seam sieve tube is direct slot on basic pipe, its processing technology has determined that the width of sand seam is bigger, thereby causes it to have anti-fine sand ability, blocked easily, and stop up the shortcoming of removing difficulty.

The utility model content

In view of this, the purpose of this utility model is to provide a kind of and has that sand controlling result is good, itself has self-cleaning function, can prevent trapezoidal sand control screen in the inserted-blade type that sand grains stops up because of deposition.

For achieving the above object, trapezoidal sand control screen comprises basis pipe and most arc empiecements in the inserted-blade type that the utility model provides; The basis pipe offers most perforates along its length direction; All curvature and the pipe thickness with basic pipe is consistent with thickness for the curvature of arc empiecement; The arc empiecement is embedded in the described perforate, and arc empiecement both ends of the surface and described perforate both ends of the surface are welded to connect, between the two sides of the two sides of arc empiecement and perforate, be formed with two respectively and be minor face, serve as the interior trapezoidal sand seam on long limit with the slit between described basis pipe, arc empiecement inner surface with the slit between described basis pipe, arc empiecement external surface.

Two adjacent perforates are parallel to be distributed on the tube wall of described basic pipe side by side, be formed with the perforate section and be used to increase the supporting section of described basis pipe intensity at the tube wall of described basic pipe, and described perforate section and described supporting section is spaced.

The perforate of adjacent two perforate sections is staggered along the length direction of described basic pipe and arranges.

The perforate of adjacent two perforate sections is the co-axially align arrangement along the length direction of described basic pipe.

Described arc empiecement is that the tubing identical with described basic tube wall caliber is made.

Dimensional errors between the width of arc empiecement external surface and the width of described perforate is between 0.1mm～0.5mm.

In angle between two sides of trapezoidal sand seam less than 45 degree, and the external surface seam of interior trapezoidal sand seam wide be between 0.05mm～0.25mm.

Trapezoidal sand control screen in the inserted-blade type of the present utility model, can make manhole ladder shape slot at the wide 0.05mm～0.25mm of being of screen casing external surface seam, played the purpose of sand control effectively, little owing to screen casing external surface gap width simultaneously, and screen casing inner surface slot width is big, as long as the sand of small particle diameter can enter the slit, just can not stop up, therefore trapezoidal sand control screen can not only sand control in the inserted-blade type of the present utility model, can also realize self-cleaning function, has prevented that sand grains from stopping up because of deposition.

Description of drawings

Fig. 1 is the basis pipe of trapezoidal sand control screen in the utility model inserted-blade type and the schematic perspective view of arc empiecement;

Fig. 2 is a basic pipe of the present utility model in the perforate section along the schematic cross-section perpendicular to the screen casing axial direction;

Fig. 3 is an arc empiecement schematic cross-section of the present utility model;

Fig. 4 be in the utility model inserted-blade type trapezoidal sand control screen in the perforate section along schematic cross-section perpendicular to the screen casing axial direction;

Fig. 5 is the enlarged diagram of interior trapezoidal sand seam among Fig. 4;

Fig. 6 is the schematic perspective view of trapezoidal sand control screen in the utility model inserted-blade type;

Fig. 7 is traditional vertical masonry joint sand control screen schematic cross-section.

The specific embodiment

In conjunction with the accompanying drawings most preferred embodiment of the present utility model is done following description:

As shown in Figure 1, trapezoidal sand control screen comprises basis pipe 1 and most arc empiecements 2 in the inserted-blade type of the present utility model, its length direction of pipe 1 upper edge, basis offers most perforates 101, two adjacent perforates 101 are parallel to be distributed on the tube wall of basis pipe 1 side by side, and the tube wall at basis pipe 1 is formed with perforate section 10 and is used to increase the supporting section 11 that 1 intensity is managed on the basis, perforate section 10 is spaced with supporting section 11, the perforate 101 of adjacent two perforate sections 10 is staggered along the length direction of basis pipe 1 arranges, and the perforate 101 of adjacent two perforate sections 10 also can be managed 1 length direction along the basis and is co-axially align and arrange.As shown in Figure 2, perforate 101 is evenly distributed around the tube wall outer peripheral edges of basis pipe 1, and perforate 101 is a rectangle along pipe 1 diametric cross section, described basis, the width unanimity of each perforate 101.As shown in Figure 3, adopt and the identical tubing of basis pipe 1 caliber tube wall, it is consistent with perforate 101 to make length, the external surface width is slightly less than the arc empiecement 2 of perforate 101 width, all curvature and the pipe thickness with described basis pipe 1 is consistent with thickness for the curvature of arc empiecement 2, dimensional errors between the width of arc empiecement 2 external surfaces and the width of perforate 101 is between 0.1mm～0.5mm, arc empiecement 2 external surface width are greater than the inner surface width, be that two sides have angle, with the 2 embedding perforates 101 placed in the middle of arc empiecement, along its length perforate 101 both ends of the surface and arc empiecement 2 both ends of the surface are welded to connect.As shown in Figure 4, arc empiecement 2 two sides and perforate 101 medial surfaces form angle, and it is trapezoidal that the cross section is, with the slit between basis pipe 1, arc empiecement 2 external surfaces is minor face, with the slit between basis pipe 1, arc empiecement 2 inner surfaces is long limit, respectively form trapezoidal sand seam 12 in like this in each arc empiecement 2 both sides, angle theta between two sides of interior trapezoidal sand seam 12 is less than 45 degree (as shown in Figure 5), as shown in Figure 6, arc empiecement 2 of the present utility model be welded on perforate 101 back on body, form in trapezoidal sand stitch 12.

It has broken through the slit boundary of traditional vertical masonry joint screen casing the interior trapezoidal sand control screen of inserted-blade type of the present utility model.Present vertical masonry joint screen casing can't that is to say that the sand grains less than 0.20mm can directly enter oil pipe by the vertical masonry joint screen casing less than 0.20mm because of processing technology limits its slit.And trapezoidal sand control screen in the utility model inserted-blade type, owing to adopt arc empiecement 2 is embedded and is welded on technology in the perforate 101, the gap width that interior trapezoidal sand stitches 12 external surfaces can be made by the size requirements of sand production particle diameter, therefore the gap width d that interior trapezoidal sand stitches 12 external surfaces can be processed scope, be fit to all situations of field produces at 0.05mm～0.25mm.

As shown in Figure 4, trapezoidal sand control screen is interior fully trapezoidal in the inserted-blade type of the present utility model, compares the inside and outside horn mouth shape of coiling screen casing, has got rid of outer wall and has stopped the sand possibility.And because there is not the vertical masonry joint district in interior trapezoidal sand seam 12, stitch by in the export-oriented pipe of pipe along sand, screen casing external surface gap width minimum, and screen casing inner surface sand seam width maximum, therefore as long as the sand of small particle diameter can enter the slit, just can not stop up, therefore trapezoidal sand control screen can not only sand control in this inserted-blade type, itself also has self-cleaning function simultaneously, has prevented that sand grains from stopping up because of deposition.

Screen casing is provided with a plurality of perforate sections 10 in the utility model, 10 of adjacent apertures sections leave the supporting section 11 of sufficient length, and axially staggered along basis pipe 1 of 10 perforates of adjacent apertures section 101, these two measures make whole tube column strength can bear the diameter of axle that down-hole formation gives it to pressure.

The above is preferred embodiment of the present utility model only, is not to be used to limit protection domain of the present utility model.

Claims

1, trapezoidal sand control screen in a kind of inserted-blade type is characterized in that, comprises basis pipe and most arc empiecements; Described basic pipe offers most perforates along its length direction; All curvature and the pipe thickness with described basic pipe is consistent with thickness for the curvature of described arc empiecement, described arc empiecement embeds and is welded to connect by the both ends of the surface of described arc empiecement and the both ends of the surface of described perforate in the described perforate, is formed with two respectively and is minor face, serves as that the interior trapezoidal sand on length limit stitches with the slit between described basis pipe, arc empiecement inner surface with the slit between described basis pipe, arc empiecement external surface between the two sides of the two sides of described arc empiecement and described perforate.

2, trapezoidal sand control screen in the inserted-blade type as claimed in claim 1, it is characterized in that, described two adjacent perforates are parallel to be distributed on the tube wall of described basic pipe side by side, be formed with the perforate section and be used to increase the supporting section of described basis pipe intensity at the tube wall of described basic pipe, and described perforate section and described supporting section are spaced.

3, trapezoidal sand control screen in the inserted-blade type as claimed in claim 2 is characterized in that, the perforate of described adjacent two perforate sections is staggered along the length direction of described basic pipe and arranges.

4, trapezoidal sand control screen in the inserted-blade type as claimed in claim 2 is characterized in that, the perforate of described adjacent two perforate sections is the co-axially align arrangement along the length direction of described basic pipe.

5, trapezoidal sand control screen in the inserted-blade type as claimed in claim 1 is characterized in that described arc empiecement is made by the tubing identical with described basic tube wall caliber.

6, trapezoidal sand control screen in the inserted-blade type as claimed in claim 1 is characterized in that the dimensional errors between the width of described arc empiecement external surface and the width of described perforate is between 0.1mm～0.5mm.

7, trapezoidal sand control screen in the inserted-blade type as claimed in claim 1 is characterized in that, the angle between two sides of described interior trapezoidal sand seam is less than 45 degree, and it is between 0.05mm～0.25mm that the external surface of described interior trapezoidal sand seam stitches wide.