CN2575295Y - Dewatering device state parameter ZW undamped pressure conductor - Google Patents

Abstract

The utility model relates to a rib type oil extraction and sand prevention pipe. An outer wall of an inner pipe is axially fixed with a plurality of equidistant ribs. An inner wall of a metal sleeve pipe, a pipe wall of an outer pipe of which is overspread with slotted holes, is laid with metal meshes which are sheathed on the ribs and are matched with the ribs. Two end heads of the outer pipe are respectively provided with a clamping hoop. The utility model has the advantages of simple structure, long service life and good permeability of petroleum crude oil.

Description

The fin formula is recovered the oil and is prevented sandpipe

Affiliated technical field

The utility model relates to a kind of filter, particularly relates in a kind of sleeve pipe of oil well and prevents under the oil pipe that oil-sand from entering the sand control installation in the pipe.

Background technology

At present, the used sand control installation of oil field oil recovery sand control, be on inside and outside tube wall, to lay multilayer stainless steel wire fine sand net, after welding by mouth, fill corundum and form in the town in again between outer tube, this kind sand control installation can filter tiny oil-sand preferably, still, and the cost height, especially at high temperature, in the operating environment of high pressure, service time is shorter, use cost height, Patent Office of State Intellectual Property Office, a kind of stainless steel sand-preventing petroleum of CN2366553Y utility model patent expanded metals of bulletin, if technology is that equidistant on the stainless plate of 0.5mm interleaved to have established its width be the microscler hole of 0.1-3mm, application life is longer, and vadose solution is better, but, the width in its space can only be more than 0.1mm, so, powerless to oil-sand less than 0.1mm.

Because of a kind of compound sand anchor of tame Department of Intellectual Property in bulletin on May 16 calendar year 2001.Utility model patent, if patent is made up of the seamless parent tube that is covered with eyelet, on the outer wall of seamless parent tube, be equipped with one deck stainless steel cloth, deposit a stainless steel plate mesh tube that is covered with aperture at the external surface cover of stainless steel cloth, the two ends of net tube are with fixing hoop, this utility model patent, high temperature resistant, high pressure, permeability height, but mesh is easily stopped up by sandstone when using for a long time, makes oil be difficult for soaking into, and permeability is step-down gradually.

Summary of the invention

The purpose of this utility model is to overcome above-mentioned weak point, provides a kind of simple in structure, easy for installation, and the fin formula that the petroleum crude oil permeability is high is recovered the oil and prevented sandpipe.In order to achieve the above object, the technical solution adopted in the utility model is: axially be fixed with the metal sleeve inwall that is covered with slotted hole on equidistant several fin outer tube wall at the outer wall of interior pipe and lay the wire lath cover and be socketed on the fin and with it and match, the outer tube two ends is installed clip respectively.

Advantage of the present utility model

This apparatus structure is simple, and is easy for installation, and high temperature resistant, high pressure, sandstone are difficult for stopping up petroleum crude oil permeability height.

Description of drawings

Fig. 1 is the utility model schematic diagram

Fig. 2 is the A-A sectional view of Fig. 1

Fig. 3 is fin and interior pipe connection diagram

Fig. 4 is the B-B sectional view of figure

The specific embodiment

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.By Fig. 1-Fig. 4 as can be known, this reality is novel to be that outer wall at interior pipe 1 axially is fixed with the metal sleeve inwall that is covered with slotted hole 3 on equidistant several fin 2 outer tubes 4 tube walls and lays metal net 7 and be socketed on the fin 2 and with it and match, and outer tube 4 two ends are installed clip 5 respectively.

Be covered with circular hole 6 on the interior pipe 1 circle wall between the described fin 2.

Pipe in described in the utility model, metal outer pipe, the even metal material processing that adopts of metal sleeve and fin is made, described metal net can adopt stainless steel to make, or adopt hard moulding material matter processing and fabricating, 0.03-0.07mm can be processed in the mesh aperture that wire lath puts, and the hole of metal sleeve tube wall can be slotted hole or circular hole, and clip is installed in the metal sleeve two ends.Metal net inwall described in the utility model and fin match, because the eyelet that the setting of fin makes oil-sand be difficult for wire lath is put stops up, therefore make the petroleum crude oil rapid permeability, have prolonged the service time of anti-sandpipe like this.Therefore the petroleum crude oil permeability is also corresponding has improved.

Claims (2)

1, a kind of fin formula is recovered the oil and is prevented sandpipe, form by the metal net, it is characterized in that: axially be fixed with the metal sleeve inwall that is covered with slotted hole (3) on equidistant several fin (2) outer tube (4) tube wall at the outer wall of interior pipe (1) and lay metal net (7) and be socketed on fin (2) and go up and match with it, outer tube (4) two ends is installed clip (5) respectively.

2, according to the anti-sandpipe of the described fin formula oil recovery of claim 1, it is characterized in that: be covered with circular hole (6) on interior pipe (1) tube wall between the fin (2).

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