CN201159075Y

CN201159075Y - Stainless steel wrap wire sand prevention pipe

Info

Publication number: CN201159075Y
Application number: CNU2008200788804U
Authority: CN
Inventors: 桂钦民
Original assignee: BEIJING DONGSHENG CENTURY SCIENCE AND TECHNOLOGY Co Ltd
Current assignee: BEIJING DONGSHENG CENTURY SCIENCE AND TECHNOLOGY Co Ltd
Priority date: 2008-02-01
Filing date: 2008-02-01
Publication date: 2008-12-03
Anticipated expiration: 2018-02-01

Abstract

The utility model relates to a sand control tube made of stainless steel wrap wires, which belongs to the technical field of petroleum and natural gas producing facilities. The sand control tube is composed of a parent tube and stainless steel wrap wires spirally wrapped along the external wall of the parent tube, wherein the bottom of the stainless steel wrap wires is provided with a plurality of protuberances, interval slits are formed among the protuberances, one lateral side of the stainless steel wrap wires is provided with a plurality of protuberances, and interval slits are formed among each protuberance, thereby a filtering sleeve with radical and axial slits is formed after the stainless steel wrap wires are wrapped on the external wall of the parent tube. The sand control tube made of stainless steel wrap wires improves capacity of resisting radical extrusion, axial strain and extrusion, and prolongs the service life of the tube.

Description

Stainless steel wrap wire is prevented sandpipe

Technical field

The utility model belongs to oil, natural gas extraction equipment technical field, and particularly a kind of adopting at oil, air to open is used for the down-hole and prevents formation sand production, filter oil mechanism of qi tool sand control filter in the process.

Background technology

General great majority enter the oil field of development late stage, and its sand production increases, and sand causes the precipitation fouling in pump barrel, cause the oil well pump cisco unity malfunction, the oil well pump pump efficiency reduces even stop pumping, causes unnecessary workover treatment, and frequent workover treatment has increased a large amount of cost of production.In order to guarantee output, the anti-sandpipe of lengthening overstriking becomes a kind of trend, has so both increased cost for oil production, and also the construction of oil supply well operations brings certain difficulty.

Accurate roll extrusion or punch forming stainless steel wire are crossed filter ruffle as sand control on the parent tube that is equipped with the hole, be to prevent a kind of mechanical device that payzone shakes out in oil, the construction of natural gas fields process.The anti-sandpipe of existing a kind of stainless steel wrap wire, its structure as shown in Figure 1, by parent tube 11, be axially disposed within the steel wire 12 of parent tube outer wall and form along the stainless steel wrap wire 13 of parent tube outer wall and the spiral winding of steel wire; A plurality of through holes 14 distribute on the tube wall of this parent tube.The cross section of stainless steel wrap wire 13 is trapezoidal 15, as shown in Figure 2.After this stainless steel wrap wire is wrapped in the parent tube outer wall, form one and cross filter ruffle, and between the stainless steel wrap wire along the outer little interior big slit of radially having of parent tube wall, between parent tube outer wall and the steel wire 12 axial slits is arranged, as shown in Figure 1.

The operating principle of the anti-sandpipe of stainless steel wrap wire is: when anti-sandpipe is connected under oil, the sleeve pipe, the oil gas borehole fluid enters parent tube by slit between the stainless steel wrap wire and gap, stainless steel wire bottom surface, and the sand retaining is being prevented outside the sandpipe, to reach the sand control purpose.

The radial and axial intensity of the filtration nested structure of above-mentioned anti-sandpipe is all little, and the easy-to-draw filter ruffle of going bad when managing is instantly crossed filter ruffle and also is vulnerable to manage the extruding of outer big sandstone and deformed damaged in the pipe work process, and lack application life.

Summary of the invention

The purpose of this utility model is for overcoming the weak point of prior art, design the anti-sandpipe of a kind of novel stainless steel wrap wire, structure to stainless steel wrap wire is improved, and has strengthened opposing radial compression and the anti-ability of axially pulling, pushing, and has prolonged application life.

The anti-sandpipe of the stainless steel wrap wire of the utility model design, form by parent tube with along the stainless steel wrap wire of the spiral winding of parent tube outer wall, it is characterized in that, the bottom of described stainless steel wrap wire is provided with a plurality of juts, form the discontinuous slit between each jut, one flank side surface is provided with a plurality of juts, forms the discontinuous slit between each jut, forms a radial and axial all apertured filter ruffle of crossing after making this stainless steel wrap wire be wrapped in the parent tube outer wall.

The cross sectional shape of described stainless steel wrap wire can be T type, trapezoidal, rectangle or different shape such as square.The side and the horizontal plane of described side extending projection portion can have 15-20 degree angle.

This anti-sandpipe utilization filtration puts the slit allows formation fluid enter in the parent tube, thereby formation particle is blocked in outside the screen casing, thereby reaches the sand control purpose.

The utility model is than its great advantage with like product:

(1) stainless steel wire and the parent tube bottom of combining closely still has passage, when guaranteeing area of passage, sufficient intensity opposing radial compression is arranged.

(2) combine closely in the stainless steel wire side, made filter ruffle form the integral body that has the slit, has sufficient intensity to resist and axially pull, push.

More than 2 binding energy guarantee that this new type of sand prevention pipe installs to the down-hole down smoothly, and can guarantee in use to resist external destruction.In the process of going into the well, protective sleeve need not be installed, overcome that conventional wrapping wire crosses that filter ruffle is gone into the well and use in the easy extruding problem of pulling of wrapping wire, and cost is descended.

Description of drawings

Fig. 1 is existing a kind of stainless steel wrap wire sand control tubular structure generalized section.

Fig. 2 is the stainless steel wrap wire shape schematic diagram among Fig. 1, wherein, (a) is front view, (b) is the side diagrammatic sketch.

Fig. 3 is a stainless steel wrap wire sand control tubular structure semi-section schematic diagram of the present utility model.

Fig. 4 is the local enlarged diagram of Fig. 3.

Fig. 5 is the stainless steel wrap wire embodiment shape schematic diagram among Fig. 3, wherein, (a) is front view, (b) is the side diagrammatic sketch, (c) is vertical view.

The specific embodiment

The utility model is described in further detail below in conjunction with drawings and Examples:

The stainless steel wrap wire sand control tubular structure of the utility model design comprises parent tube 2 (at a plurality of through holes that distribute on the tube wall of this parent tube), the top connection 1, upper fixed seat 3, the lower fixed seat 5 that link to each other with parent tube, is wrapped in the filter ruffle 4 excessively that the stainless steel wrap wire on the parent tube outer wall forms as shown in Figure 2.

The utility model has mainly improved the shape of rust steel wrapping wire, formed filtration is enclosed within axially and circumferencial direction forms annular and is interrupted slit 6, and is closely continuous with solder joint 7 between the rust steel wrapping wire, as shown in Figure 4.

A kind of embodiment shape of rust steel wrapping wire as shown in Figure 5, the bottom of stainless steel wrap wire 4 is provided with a plurality of juts 41, form the discontinuous slit between each jut, one flank side surface is provided with a plurality of juts 42, form the discontinuous slit between each jut, this stainless steel wrap wire forms a radial and axial all apertured filter ruffle of crossing after being wrapped in the parent tube outer wall.

Describe an example structure of the present utility model and implementation below for example in detail.

The parent tube structure of present embodiment is identical with existing commonly used parent tube, and what do not exist together is the shape of stainless steel wrap wire, as shown in Figure 5; Its cross sectional shape is the T type, also can be trapezoidal, rectangle or different shape such as square.

The end face width of the rust steel wrapping wire of present embodiment is 4mm, and overall height is 3mm, and the height of bottom salient portions is 1.5mm, and width is 1.5mm; The wide of side extending projection portion 42 is 10mm, highly is 0.15-1.5mm, at a distance of 30mm side and horizontal plane 15-20 degree angle can be arranged between two juts.

The distribution of being separated by in the axial direction of a plurality of juts 41 of the bottom of stainless steel wrap wire and a plurality of juts of side.

Above-mentioned stainless steel wrap wire is along parent tube 2 helically coilings, and its bottom surface and parent tube are combined closely, and also combines closely in the wrapping wire side, welds at pad 7 places simultaneously taking up.

The actual combination of wrapping wire side extending projection portion has two kinds:

(1) accurately welds with being interrupted after the reserving gaps;

(2) be extruded with the special type stainless steel wire of discontinuous projection with the side, the side closely arrange and at the side extending projection place with welding.

Formed filter ruffle after stainless steel wrap wire and parent tube coiling have been welded, crossing filter ruffle slit 6 is 0.15-0.15mm.

Stainless steel wrap wire and parent tube are combined closely, and the stainless steel wrap wire bottom is axially forming runner with the parent tube external diameter.

Adjacent stainless steel wire is combined closely, and forms filter ruffle 4, and forms integral body with parent tube, forms axially effectively seepage channel, and has increased the intensity of anti-sandpipe, can avoid this wrapping wire to prevent sandpipe colliding with, pulling in the installation process of going into the well.

Stainless steel wrap wire sand control tubular structure size and implementation that the foregoing description is cited only are used to illustrate; can not be in order to limit the utility model at the protection domain that claims limited, every variation that the foregoing description is done all should belong to protection category of the present utility model.

Claims

1, the anti-sandpipe of a kind of stainless steel wrap wire, form by parent tube with along the stainless steel wrap wire of the spiral winding of parent tube outer wall, it is characterized in that, the bottom of described stainless steel wrap wire is provided with a plurality of juts, form the discontinuous slit between each jut, one flank side surface is provided with a plurality of juts, forms the discontinuous slit between each jut, forms a radial and axial all apertured filter ruffle of crossing after making this stainless steel wrap wire be wrapped in the parent tube outer wall.

2, the anti-sandpipe of stainless steel wrap wire as claimed in claim 1 is characterized in that, the cross sectional shape of described stainless steel wrap wire be T type, trapezoidal, rectangle or square among any shape.

3, the anti-sandpipe of stainless steel wrap wire as claimed in claim 1 is characterized in that, the side and the horizontal plane of described side extending projection portion can have 15-20 degree angle.