CN2584823Y

CN2584823Y - High-precision sand filter pipe

Info

Publication number: CN2584823Y
Application number: CN 02255395
Authority: CN
Inventors: 卫然; 王登庆; 高斌; 吴建平; 王海波
Original assignee: Oil Production Technology Research Institute of Sinopec Shengli Oilfield Co
Current assignee: Oil Production Technology Research Institute of Sinopec Shengli Oilfield Co
Priority date: 2002-11-22
Filing date: 2002-11-22
Publication date: 2003-11-05
Anticipated expiration: 2012-11-22

Abstract

The utility model discloses a high-precision sand filter pipe, which comprises a base pipe (1), a protective pipe (5) and a sand filter layer (4) arranged between the base pipe and the protective pipe, wherein, the sand filter layer (4) is composed of metal plate nets (7 and 9) and a fibrous layer clamped between the metal plate nets. The sand filter pipe has the characteristics of high precision of sand shielding, good penetrability, strong elasticity and good anti erosion performance, and can be widely used in the sand prevention technology of various oil-gas wells.

Description

The high accuracy sand screen

One, technical field:

The utility model relates to pipe, relates in particular to a kind of high accuracy sand screen that is applicable to oil gas well sand-preventing process.

Two, background technology:

Existing a kind of sand screen; purpose is to prevent and stop reservoir sand to be invaded in the well and stop up the oil gas well; its structure mainly is to swathe the metal felt of tying with steel wire on parent tube; the protection of external application pillar; the sand screen of this structure can play the sand control effect to a certain extent, but it also exists following shortcoming and defect simultaneously: (1)

When metal felt filter sand layer swathes on parent tube,, cause its became uneven even, cause bearing strength and sand block ability not high owing to operation factors such as drawing, pull, drag; (2) in the oil gas well manufacturing process, because the existence of inside and outside producing pressure differential, it is loosening that the filter sand layer swathes the steel wire that bundle fights, and in addition with the impact of sand gas stream, loose filter sand layer produced slide, thereby the cavity occurs, causes the sand-preventing process failure; (3) because protection tube is not anticorrosive, under the corrosiveness of formation oil air-flow, the too fast damage of protection tube causes sand screen shorter application life.

Three, summary of the invention:

The technical problems to be solved in the utility model is to overcome shortcoming or the deficiency that exists in the above-mentioned prior art, and a kind of bearing strength height is provided, and the sand block ability is strong, has the high accuracy sand screen of anti-corrosion protection pipe.

The technical scheme that the utility model is dealt with problems is: a kind of high accuracy sand screen, comprise parent tube, protection tube and place parent tube and protection tube between the filter sand layer, its filter sand layer is made of inside and outside metal lath and the fibrage that inserts and puts wherein.

Fibrage of the present utility model is a glass layer, and metal lath is the tubular body that corrosion resistant plate is made, and well-regulated hole on it forms net structure, and the tabular hole pattern of glass layer and stainless steel is compressed together, forms tubular structure, and device is on parent tube.Protection tube is a corrosionproof pipes, is plastic pipe or Corrosion resistant linings pipe, and Qi Bishang is furnished with the through hole by last helical arrangement.

The utility model has following advantage compared with prior art:

1, metal lath and glass fiber filter sand layer elasticity are strong, have good anti-erosion property, long service life.

2, metal lath and glass fiber filter sand layer good penetrability, sand block precision height should not stop up, and promptly satisfies sand control, also satisfies the needs of gas well sand-preventing process.

3, protection tube is a corrosionproof pipes, can effectively prevent the corrosion of various working fluids and formation oil air-flow, protects and prolonged the life-span that made of sand screen effectively.

4, metal lath and glass fiber filter sand layer fitting operation are convenient, and overall performance is stable, and is safe and reliable.

Four, description of drawings:

Fig. 1 is the utility model knot schematic diagram;

Fig. 2 is a filter sand layer structural representation shown in Figure 1.

Five, the specific embodiment:

Consult Fig. 1, Fig. 2; the utility model comprise parent tube 1, protection tube 5 and place parent tube and protection tube between filter sand layer 4; filter sand layer 4 by metal lath 7 and 9 and the fibrage 8 that inserts and puts wherein constitute tubular structure; device is on parent tube 1; two ends are compressed by pressure ring 3; protection tube 5 is enclosed within outermost, and two ends are fixed on the parent tube 1 by gland 2.The through hole 6 of protection tube 5 is last helix shape, when changing fluid flow direction, also can increase the lifting force in the oil recovery process, significantly reduces the resistance of pump, for improving pump efficiency, increases output and has created condition.

Claims

1, a kind of high accuracy sand screen, comprise parent tube (1), protection tube (5) and place parent tube and protection tube between filter sand layer (4), it is characterized in that filter sand layer (4) is made of metal lath (7,9) and the fibrage (8) that inserts and puts wherein.

2, high accuracy sand screen according to claim 1 is characterized in that fibrage (8) and metal lath (7,9) are one, in tubular construction, is installed on the parent tube (1).

3, high accuracy sand screen according to claim 1 and 2 is characterized in that fibrage (8) is a glass layer.

4, high accuracy sand screen according to claim 1 and 2 is characterized in that the tubular body that metal lath (7,9) is made for corrosion resistant plate, well-regulated hole on it.

5, high accuracy sand screen according to claim 1 and 2 is characterized in that outer tube (5) is the anticorrosion pipe that touches, and Qi Bishang is furnished with the through hole (6) by last helical arrangement.