CN2721870Y

CN2721870Y - Overcoating sandproof pipe of steel wire gauze

Info

Publication number: CN2721870Y
Application number: CN 200420070392
Authority: CN
Inventors: 马凤廷
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-08-19
Filing date: 2004-08-19
Publication date: 2005-08-31
Anticipated expiration: 2014-08-19

Abstract

The utility model discloses an overcoating sandproof pipe of the steel wire gauze for the downhole oil production of the oil field. A coupling is connected with the screw thread of the base pipe; the middle part of the base pipe is provided with screen openings; a fixed ring and a positioning ring are respectively sheathed on the upper and the lower end of the base pipe, welded together; a supporting net, a filter bed, and the overcoating of the steel wire gauze are successively sheathed from the inner to the outer of the middle part of the base pipe; both ends of the outer sleeve of the steel wire gauze and the fixed ring are welded or connected in a metal liquid filling mode; accordingly, the overcoating sandproof pipe of the steel wire gauze is manufactured. The overcoating sandproof pipe of the steel wire gauze solves the problems that in the existing prior art, fine sands cannot be prevented, the sandproof effect is poor, and the effective date for the sandproofing is short. The utility model can be extensively used for the sandproof operation of the downhole oil production of the oil field.

Description

The gauze wire cloth overcoat is prevented sandpipe

Technical field:

The utility model relates to the anti-sandpipe of gauze wire cloth overcoat that a kind of oil field down-hole oil production sand control is used.

Background technology:

Sand production is one of major issue that runs in the middle of the oil exploitation.Be applied to sand control at present and mainly use chemical sand control and mechanical sand control.Most wells is that the employing mechanical sand control is main, and what the mechanical sand control application was more is to adopt integral sintered stainless steel metal fibre screen casing and cutting seam sieve tube.Stainless steel metal fibre piece processing fastness in the integral sintered stainless steel metal fibre screen casing is relatively poor, metallic fiber piece obscission can occur during the extruding well, influences sand controlling result, and the sand control life is short.Cutting seam sieve tube can not be prevented fine silt, and slot is bad by thorn easily.

The utility model content:

In order to overcome deficiency of the prior art, the utility model provides a kind of gauze wire cloth overcoat to prevent sandpipe, because this sand control bore is big, tensile strength is big, the sand washing operator is just big with filtration area behind the sand control, can prevent thick, medium sand and fine silt, sand control long service life in well.

The technical scheme that the utility model technical solution problem is adopted is: box cupling and parent tube screwed connection, in the middle of parent tube, be provided with sieve aperture, retainer ring, spacing ring are enclosed within up and down two ends and being welded as a whole of parent tube, be with supporting network, filtration beds, gauze wire cloth overcoat from the inside to the outside successively at the parent tube middle part, welding of gauze wire cloth overcoat two ends or filling molten metal are connected with retainer ring, during use, should prevent that sandpipe was placed in aligning oil reservoir position in the sleeve pipe.Be provided with plug in this anti-sandpipe bottom, at an upper portion thereof with the back-off packer screwed connection.When the sand grains of free state in the oil reservoir with the anti-sandpipe of oil stream convection around the time, in, coarse sand is blocked and around the anti-sandpipe deposition, fine silt enters pit shaft along with oil flows by sieve aperture, is brought to ground.When oil well production arrives certain hour, will be filled up by thicker reservoir sand around the anti-sandpipe, and form new gravel packer, gravel packer also can block the parts of fine flour sand, and sand controlling result is remarkable.

The utility model beneficial effect is simple in structure, is convenient to sand control treatment, this anti-sandpipe since with former outer tube with holes change into gauze wire cloth overcoat good penetrability, high temperature resistant, filtration area is big, sand controlling result is good, the sand control long service life.

Description of drawings:

Fig. 1 is the utility model overall structure schematic diagram.

Among the figure 1, box cupling, 2, parent tube, 3, retainer ring, 4, spacing ring, 5, supporting network, 6, filtration beds, 7, the gauze wire cloth overcoat, 8, sieve aperture.

The specific embodiment:

In Fig. 1, the anti-sandpipe of gauze wire cloth overcoat is made up of box cupling 1, parent tube 2, retainer ring 3, spacing ring 4, supporting network 5, filtration beds 6, gauze wire cloth overcoat 7, sieve aperture 8; With box cupling 1 and parent tube 2 screwed connections, be provided with the sieve aperture 8 that hole shape is circular hole, square hole, slot hole at parent tube 2 mid portions, retainer ring 3, spacing ring 4 are enclosed within parent tube respectively, and about in the of 2 two ends and being welded as a whole, filtration beds 6 is to make with metal wool, metal felt, wire cloth, fine groove net, gas net, special-shaped net, be with supporting network 5, filtration beds 6, gauze wire cloth overcoat 7 from the inside to the outside successively at parent tube 2 middle parts, gauze wire cloth overcoat 7 two ends are connected with retainer ring 3 welding or filling molten metal.

Claims

1, a kind of gauze wire cloth overcoat is prevented sandpipe, it is by box cupling (1), parent tube (2), retainer ring (3), spacing ring (4), supporting network (5), filtration beds (6), gauze wire cloth overcoat (7), sieve aperture (8) is formed, it is characterized in that: with box cupling (1) and parent tube (2) screwed connection, be provided with sieve aperture (8) at parent tube (2) mid portion, with retainer ring (3), spacing ring (4) is enclosed within parent tube (2) two ends and being welded as a whole up and down respectively, be with supporting network (5) from the inside to the outside successively at parent tube (2) middle part, filtration beds (6), gauze wire cloth overcoat (7) is connected gauze wire cloth overcoat (7) two ends with retainer ring (3) welding or filling molten metal.

2, the anti-sandpipe of gauze wire cloth overcoat according to claim 1, it is characterized in that: sieve aperture (8) hole shape that is located at parent tube (2) middle part is circular hole, square hole, slot hole; Filtration beds (6) is to make with metal wool, metal felt, wire cloth, fine groove net, gas net, special-shaped net.