CN2226144Y

CN2226144Y - High-temp-and high-pressure-resistant integrated sieve tube

Info

Publication number: CN2226144Y
Application number: CN 95231321
Authority: CN
Inventors: 胡用久; 孙厚利; 高奎金; 李万夫; 郎杰
Original assignee: 胡用久
Priority date: 1995-06-05
Filing date: 1995-06-05
Publication date: 1996-05-01
Anticipated expiration: 2005-06-05

Abstract

The utility model relates to a high-temperature and high-pressure resistant integrated sieve tube, belonging to a sand filtering device for recovering petroleum or natural gas. The utility model comprises a base tube, and two or more filtering blocks and a casing tube. The base tube is provided with two or more blind holes, and the bottom wall of each blind hole is provided with more than three small holes. The filtering blocks are formed by pressing stainless steel wires, pressed into the blind holes, and sheathed with casing tubes. The section of the casing tube corresponding to the blind hole is provided with two or more small holes. Both ends of the casing tube is welded and fixed with the tube wall of the base tube, so the sealing condition is achieved. The utility model not only has good sand filtering effect, but also has firm and durable performance.

Description

High temperature resistant, high pressure integral screen

The utility model relates to the filter sand device in a kind of recover petroleum, the natural gas process.

The oil field will prevent that sand from sneaking in oil or the gas well in oil, gas exploitation course, if sand control is bad, can cause the heavy wear of pumping equipment.In addition, a large amount of sands sink to the shaft bottom, can bring difficulty to exploitation after accumulation is many, even cause stopping production, and producing well is scrapped.Present existing sand control filter sieve tube, filtering material is insecure, easily comes off to the down-hole, and strainability is relatively poor, down short application life to the down-hole in addition, thereby has improved the operating cost of oil recovery, gas.

The purpose of this utility model, provide a kind of prevent sand enter oil or gas and the integral screen of high temperature resistant, high pressure.

High temperature resistant, high pressure integral screen are made of box cupling, parent tube, 2 above filter blocks and sleeve pipe.Parent tube is the stainless steel tube (seamless steel pipe) of Φ 80～400mm, has 2 above blind holes on the outer wall of parent tube, has 3 above apertures on per 1 blind hole diapire.Filter block is that metal wool gives clamp dog, and its physical dimension is identical with the physical dimension of blind hole.

During assembling, earlier filter block is pressed in the blind hole on the parent tube, in the sleeve pipe of packing into then, the two ends of sleeve pipe is connected with the tube wall solid welding of parent tube, and reaches air-proof condition.On the corresponding position of the blind hole on sleeve pipe and the parent tube, have 3 above apertures.Box cupling connects with the termination of screw thread and parent tube.

The another kind of structure of sleeve pipe is made up of 2 semicircle metal sheets, and 2 semicircle metal sheets wrap on the parent tube (have been inlayed metal wool and given clamp dog) in the blind hole of parent tube, and after compressing, solid welding connects into sleeve pipe.

The utlity model has high temperature resistant, high pressure resistant, good filtration effect, filter block can not come off, advantages such as long service life.

Fig. 1 is a structural representation of the present utility model, and Fig. 2 is the partial structurtes schematic diagram of Fig. 1.The utility model is described in further detail below in conjunction with accompanying drawing.

High temperature resistant, high pressure integral screen are made up of box cupling 1 and filter sand device.The filter sand device is made of parent tube 2,3,170 filter blocks 6 of sleeve pipe, stainless (steel) wire 4 and 5.Parent tube 2 is a kind of external diameter 140mm, the stainless steel tube of wall thickness 10mm (seamless steel pipe), the long 4m of parent tube.On the outer wall of parent tube 2, be drilled with 170 blind holes 7, the thick 2mm of blind hole 7 diapires.The aperture 8 that to be drilled with 13 diameters on blind hole 7 diapires be 3mm.Filter block 6 is pressed into by stainless steel wire, also makes metal wool give clamp dog.The physical dimension of filter block 6 is identical with the physical dimension of blind hole 7.In blind hole 7 bottoms stainless steel cloth 4 is set, filter block 6 employings are pressed into mode and are embedded in the blind hole 7, and its lower surface contacts with stainless steel cloth 4, and stainless steel cloth 5 is set on the upper surface of filter block 6.Sleeve pipe 3 is made up of 2 semicircle metal sheets, and 2 semicircle metal sheets wrap on the parent tube 2, compresses the back solid welding and links together, and promptly becomes tubular.The two ends of sleeve pipe 3 is connected with the tube wall solid welding of parent tube 2, and reaches air-proof condition.Have 13 apertures 9 on the blind hole 7 corresponding positions on sleeve pipe 3 and the parent tube 2, box cupling 1 connects with the termination of screw thread and parent tube 2.

During use, needed high temperature resistant, high pressure integral screen is coupled together by box cupling, total length is identical with reservoir depth.1 high temperature resistant, high pressure integral screen topmost, by box cupling with client link under the well casing in screw thread and the no oil reservoir.Like this, when starting pumping equipment, sand just can not enter in oil well or the gas well.

Claims

1, high temperature resistant, high pressure integral screen, constitute by box cupling 1 and filter, it is characterized in that described filter is made of parent tube 2,3,2 above filter blocks 6 of sleeve pipe, 2 above blind holes 7 are arranged on the outer wall of parent tube 2,3 above apertures are arranged on the diapire of per 1 blind hole; Filter block 6 is the metal wool preform, and its physical dimension is identical with blind hole 7, and filter block 6 is embedded in the blind hole 7; Sleeve pipe 3 is made up of 2 semicircle metal sheets, and 2 semicircle metal sheets wrap on the parent tube 2, and compressing also, solid welding links together, the two ends of sleeve pipe 3 are connected with the tube wall solid welding of parent tube 2, and reach air-proof condition, on the sleeve pipe 3 with blind hole 7 corresponding positions on, 3 above apertures are arranged; Box cupling 1 connects with screw thread and parent tube 2.

2, high temperature resistant, high pressure integral screen according to claim 1 is characterized in that described parent tube 2 is the stainless steel tube of Φ 80～400mm; Thick 1.5～the 3mm of described blind hole 7 diapires, aperture 8 diameters on the diapire are 2～3mm, described metal wool preform is the stainless steel wire preform.

3,, it is characterized in that on the lower surface of described filter block 6 and upper surface, being respectively arranged with stainless wire mesh 4 and 5 according to claim 1,2 described high temperature resistant, high pressure integral screen.