CN201031672Y

CN201031672Y - Bridge type filtering sieve tube

Info

Publication number: CN201031672Y
Application number: CNU2007200691965U
Authority: CN
Inventors: 易会安; 易齐尊; 李伯仁; 黄希朋; 陈善饮; 刘妙仁
Original assignee: YI HUIAN YI QIZUN
Current assignee: Starse Energy and Technology Group Co Ltd
Priority date: 2007-04-20
Filing date: 2007-04-20
Publication date: 2008-03-05
Anticipated expiration: 2017-04-20

Abstract

The utility model relates to a bridge filter screen pipe, which mainly comprises a central parent tube 1 with a plurality of flow passage holes 5, sand controlling and filtering material 7 installed on the central tube 1, an overcurrent protective sleeve 2 and a supporting disk 3. The device is characterized in that the overcurrent protective sleeve 2 is designed to be structure with function of sand controlling and filtering. The structure is that the pipe wall of the overcurrent protective sleeve 2 is densely covered with groove bridges or bow bridges 6 and the two side edges of the groove bridges or bow bridges 6 are provided with sand filter gaps 9. The utility model has the following advantages of that (1) the utility model has simple and convenient processing technology, low cost, convenient downhole operation, (2)the external diameter is small and the scope of application is wide, (3) due to sideward flow caused by the lateral slotted of the sand controlling and filtering sleeve, the erosion from crude oil to the sand controlling and filtering material reduces, achieving the purpose of protecting the sand controlling and filtering material. (4) The two edges of the sand controlling and filtering material 7 are superposed to a cylinder with no weld. The structure not only has no damage on filter screen, but also reduces effect on filter material caused by internal and external pressures and torsion action. (5) The device also has large flow discharge area, high strength and is not easy to be deformed.

Description

A kind of bridge-type filter sieve tube

Technical field

The utility model relates to a kind of mechanical sand control filter that the down-hole prevents formation sand production, filters oil gas that is used in oil, gas exploitation course, can be widely used in oil, natural gas extraction field.Specifically, relate to a kind of bridge-type filter sieve tube.

Background technology

The sand control screen that the exploitation of prior art PetroChina Company Limited. is used is more immediate three kinds:

1, first kind for the composite metal net sand control screen: put the composition metal screen pack and be enclosed within the outer jointing jacket composition metal screen pack outside on being drilled with the center parent tube in many holes, and fix with the support ring welding; The composition metal screen pack is welded on forms one on the internal protective cover.There is following shortcoming usually in this kind sand control screen: (1) composition metal screen pack is composited by multiple metal filter screen, processing technology complexity, cost height.(2) because the sand control screen pack is to be welded on the internal protective cover, therefore silk screen there is to a certain degree damage, owing to be fixed on the parent tube, make during being subjected to, under the external pressure effect, mesh eyes to be changed simultaneously, cause sand control to be failed.

2, second kind is wire-wrapped screen: directly be drilled with the steel wire that twines on the center parent tube of many filter bores through compacting, two ends are fixing with the support ring welding, control the size of sand control particle diameter by the gap size between the circle circle steel wire.There is following shortcoming usually in this kind sand control screen: (1) processing technology complexity, sand control precision are not easy control.(2) in the process of going into the well,, cause the sand control failure because the crooked filtration slit that makes becomes big.(3) because the outside does not have protective sleeve, the easy wear and rupture of steel wire when going into the well causes the sand control failure.(4) the construction operation difficulty is big, and application life is short, also is not suitable for fine sand and high pressure formation.

3, the third is a cutting seam sieve tube: the slit of directly on the parent tube of center, cutting out a rule certain width, control the size of sand control particle diameter by the width in slit.There is following shortcoming usually in this kind sand control screen: (1) slit generally all adopts laser or machine cuts to form, and is difficult to solve the anti-limit of the following rock sand of 0.2mm, makes its use occasion be restricted, and can not be used for fine sand hole condition sand control.(2) cutting owing to directly stitching on parent tube, is to consider certain intensity, and slot bar number is restricted, so the earial drainage area is little, makes its discharge capacity reduce, and can not be suitable for oil, gas, well with high production capacity.(3) after process oil gas washes away, make the slit become big, cause the sand control failure easily.(4) parent tube generally adopts carbon steel, easily corrosion.

Summary of the invention

The purpose of this utility model is the shortcoming that exists at above-mentioned technology, and provides design a kind of simple in structure, and the sand control filtering material need not welding, and easy to process, cost is low, sand control precision height, permeability height, a kind of bridge-type filter sieve tube of long service life.

A kind of bridge-type filter sieve tube of the present utility model; sand control filtering material 7, overcurrent protection cover 2 and supporting disk 3 that it mainly comprises center parent tube 1 with some through flow holes 5, be contained on the center parent tube 1 are formed; it is characterized in that: will be enclosed within the outer overcurrent protections cover 2 of sand control filtering material 7 and be arranged in tube wall and be provided with the sand control that has that gathers grooved bridge or bow type bridge 6 and be provided with filter sand slit 9 on the dual-side of grooved bridge or bow type bridge 6 and filter and cross filter ruffle 2 with the sand control of structure, supporting disk 3 is crossed filter ruffle 2 with sand control and is connected on the center parent tube 1.

The utility model compared with prior art has following advantage: (1) processing technology is simple, convenient, and cost is low, and the operation of going into the well is convenient.(2) external diameter is little, and is applied widely.(3) since sand control to cross filter ruffle be that side direction is cracked, form lateral flow, reduced the erosion of crude oil to the sand control filtering material, play the effect of protection sand control filtering material.(4) the sand control filtering material is to adopt two edges to be stacked up and to form cylindricly, does not have welding, can not cause damage to screen pack.(5) the sand control filtering material is to adopt two edges to be stacked up and to form cylindricly, therefore will significantly reduce the influence that filtering material is produced because of inside and outside pressure and twisting force.(6) the earial drainage area is big, and the intensity height is not easy distortion.Therefore (7) supporting disk and center parent tube are the destruction that surface soldered does not cause the body stress, have reduced the risk of some, and it is fastening to have added screw between supporting disk and the parent tube, and its bonding strength is improved.

Description of drawings

Fig. 1, Fig. 2, Fig. 3, Fig. 4 are the structural representation of four kinds of embodiment of a kind of bridge-type filter sieve tube of the present utility model.

Fig. 5 is the partial enlarged drawing of bridge-type filter sieve tube structure of two kinds of embodiment of Fig. 1, Fig. 2.

Fig. 6 is the partial enlarged drawing of bridge-type filter sieve tube structure of two kinds of embodiment of Fig. 3, Fig. 4.

Fig. 7 crosses the structural representation of filter ruffle for sand control.

Fig. 8 is the structural representation of sand control filtering material of the present utility model.

Fig. 9 is the cross section structure schematic diagram along Fig. 8 A-A direction.

The specific embodiment

As Fig. 1; Fig. 2; Fig. 3; Fig. 4; Fig. 5 and shown in Figure 6: a kind of bridge-type filter sieve tube of the present utility model mainly comprises the center parent tube 1 with some through flow holes 5; be contained in the sand control filtering material 7 on the center parent tube 1; overcurrent protection cover 2 and supporting disk 3 are formed; it is characterized in that: will be enclosed within the outer overcurrent protections cover 2 of sand control filtering material 7 and be arranged in and offer gather grooved bridge or bow type bridge 6 on the tube wall; and the sand control filtration that has that is provided with filter sand slit 9 on the dual-side of grooved bridge or bow type bridge 6 is crossed filter ruffle 2 with the sand control of structure, and supporting disk 3 is crossed filter ruffle 2 with sand control and is connected on the center parent tube 1.Wherein Fig. 1, Fig. 2 is characterized in that: will be enclosed within the outer overcurrent protections cover 2 of sand control filtering material 7 and be arranged in and offer the grooved bridge 6 that gathers on the tube wall; and on the dual-side of grooved bridge 6, be provided with the structure that sand control filters usefulness that has in filter sand slit 9, and Fig. 1, Fig. 2 are the difference of arrangement of bridge-type filter sieve tube and welding method.Fig. 3, Fig. 4 is characterized in that: will be enclosed within the outer overcurrent protections cover 2 of sand control filtering material 7 and be arranged in and offer the bow type bridge 6 that gathers on the tube wall, and the dual-side of bow type bridge 6 is provided with the structure that sand control filters usefulness that has in filter sand slit 9; Fig. 3, Fig. 4 are the difference of arrangement of bridge-type filter sieve tube and welding method.

Fig. 7 crosses the structural representation of filter ruffle 2 for sand control.Sand control is crossed filter ruffle 2 and is arranged in to offer on the tube wall and gathers grooved bridge or bow type bridge 6 and be provided with the structure that sand control filters usefulness that has in filter sand slit 9 on the dual-side of grooved bridge or bow type bridge 6, filter sand slit 9 on grooved bridge or the bow type bridge 6 is the strip slit, stitches wide composition according to the actual formation fineness of sand and decides.Sand control is crossed filter ruffle 2 and is welded through punching press, volume circle for corrosion resistant corrosion resistant plate.Crossing filter ruffle 2 as Fig. 1, Fig. 2, sand control shown in Figure 5 is that the grooved bridge 6 of corrosion resistant plate through punching press is welded towards the involute circle of sleeve pipe.Crossing filter ruffle 2 as Fig. 3, Fig. 4, sand control shown in Figure 6 is that the bow type bridge 6 of corrosion resistant plate through punching press is welded towards cover tube outside volume circle.

Described a kind of bridge-type filter sieve tube is characterized in that: supporting disk 3 and center parent tube 1 are that fastening and surface soldered is fixed by screw 8.

As Fig. 8 and shown in Figure 9: for sand control filtering material 7 of the present utility model is to adopt individual layer sand control screen pack two edges to stack up to form cylinder-like structure.

Claims

1. bridge-type filter sieve tube; it mainly comprises the center parent tube (1) with some through flow holes (5); be contained in the sand control filtering material (7) on the center parent tube (1); overcurrent protection cover (2) and supporting disk (3) are formed; it is characterized in that: will be enclosed within the outer overcurrent protection cover (2) of sand control filtering material (7) and be arranged in tube wall and be provided with gather grooved bridge or bow type bridge (6); and the sand control filtration that has that is provided with filter sand slit (9) on the dual-side of grooved bridge or bow type bridge (6) is crossed filter ruffle (2) with the sand control of structure, and supporting disk (3) is crossed filter ruffle (2) with sand control and is connected on the center parent tube (1).

2. a kind of bridge-type filter sieve tube according to claim 1 is characterized in that: supporting disk (3) and center parent tube (1) are that fastening and surface soldered is fixed by screw (8).

3. a kind of bridge-type filter sieve tube according to claim 1 and 2 is characterized in that: sand control filtering material (7) is to adopt individual layer sand control filtering material two edges to stack up and form cylinder-like structure.