CN2419370Y

CN2419370Y - Multifunctional underground sand filter

Info

Publication number: CN2419370Y
Application number: CN 00211390
Authority: CN
Inventors: 关多海
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-04-03
Filing date: 2000-04-03
Publication date: 2001-02-14
Anticipated expiration: 2010-04-03

Abstract

The utility model relates to a multifunctional underground sand filter used for mining oil production wells, particularly oil serious sand generating wells. The utility model is composed of a coupling hoop 1, a spacer ring 2, an inner tube 3, a large sand filtering assembly 6, a small sand filtering assembly 4 and an outer tube 5. The utility model has the advantages of novel design, simple structure and reliable operation. Sand generated in an oil well can be filtered out of a pump by the large sand filtering assembly 6 and the small sand filtering assembly 4 which are arranged on the inner tube 3, which prevents the sand from blocking the pump. The sand follows liquid flow to enter an annular space between the inner tube and the outer tube and deposit by a flow guide hole of the outer tube 5, and the sand stored in a sand storing tube connected with the lower part of the sand filter can be cleared after the pump is inspected and put forward. Oil layers are not buried by the sand. Therefore, the utility model ensures the normal exploitation and the stable yield of an oil well.

Description

Sand filter under the multifunctional well

The utility model relates to a kind of downhole hardware that is used for the particularly serious sand output well exploitation of producing well.

Sand production is a key factor that influences its ordinary production, in order to guarantee that oil well is normally exploited, stable yield, field by using various sand control measures and device.With regard to sand control mechanism, the anti-sand method of field by using can be divided into chemical sand control and mechanical sand control two big classes substantially at present.Wherein, use more mechanical sand retention device usually and can be divided into two classes again, a class is that sand is intercepted in the stratum, makes it to enter pit shaft; Though another kind of is that sand can enter pit shaft, is blocked on outside the oil well pump, can not enters oil well pump and fall to the shaft bottom.Though above-mentioned two class mechanical sand retention devices all can play sand control to some extent and guarantee the effect of oil well ordinary production, exist shortcoming separately respectively, and oil mining is caused harmful effect.The former major defect is, if the sand of piling up in the stratum around the pit shaft is too much, will influences the seepage flow of fluid so that influence oil well output; The latter's major defect is that the sand that is deposited in the pit shaft will cause sand to bury oil reservoir, cause oil well output to reduce, and increase the sand washing workload, make oil mining effect and economic benefit variation.

The purpose of this utility model be to provide a kind of both can be with the sand production filter unlikely holddown that causes oil well pump outside, can not make sand sink to pit shaft again and cause oil reservoir sand to bury, thus sand filter under the multifunctional well of assurance oil well ordinary production.

The utility model is to realize like this.This kind down-hole sand filter is made up of box cupling, outer tube, interior pipe, shading ring, large and small filter sand composite member, its structure, the assembling feature as follows: the box cupling lower end is by being connected to outer tube in the screw thread, the upper end is provided with shading ring in the outer tube, its end face is along circumference and outer tube wall welding, and the shading ring inner headed face is connected with interior pipe upper end pin thread by screw thread; Adopt in the dozens of circular hole that is provided with on the inner pipe wall punching press beat colored multiple spot locking mode respectively setting-in be fixed with little filter sand composite member, the lower end adopts the same manner setting-in to be fixed with a big filter sand composite member in the interior pipe.During use, this box cupling upper end, device top screw thread is connected with tail pipe under the oil well pump, outer tube lower end screw thread is deposited sandpipe with the bottom and is connected, with the tubing string G.I.H.After oil well drives a well, the sand of bringing the inner and outer pipes annular space into by the pod apertures of outer tube bottom with liquid stream is set up on inner pipe big or small filter sand composite member filter outside pump, then be deposited in depositing in the sandpipe of connecing under this sand filter gradually, deposit sand in the sandpipe then can be regularly or when the inspection pump proposition deposit sandpipe and removed.

The utility model modern design, simple in structure, reliable operation utilizes it effectively sand production to be filtered outside pump, can prevent to cause oil reservoir sand to bury because of sand sinks to pit shaft simultaneously, guarantees normal exploitation of oil well and stable yield, is suitable for and applies.

Accompanying drawing is a structural representation of the present utility model.

Below in conjunction with accompanying drawing enforcement of the present utility model is described further.

As shown in the figure, the utility model is made up of box cupling 1, shading ring 2, interior pipe 3, little filter sand composite member 4, big filter sand composite member 6 and outer tube 5.Wherein, outer tube 5 adopts long 3 " tubing nipples (inside and outside footpath is respectively 76mm and 89mm); its upper/lower terminal is respectively equipped with box cupling 1 and deposits the standard oil pipe thread that sandpipe is connected usefulness with connecing down, and tube wall upper edge, bottom is evenly distributed in the pod apertures of 10-20 φ 15-25 for 0.6-1.0m.Interior pipe 3 long 0.4-0.5m, external diameter 63-65mm, internal diameter 54-56mm, upper end band pin thread, the lower end inner headed face is provided with a up-small and down-big conical surface filtration that is used to install big filter sand composite member 6, is uniformly distributed with the little filter sand composite member 4 usefulness φ 18-20 through holes of installation that 50-70 inner headed face is provided with step on the body total length tube wall along the circumference.Shading ring 2 is the annulus that an inside and outside footpath matches with interior pipe 3 peripheries and outer tube 5 inner headed faces respectively, inner headed face band negative thread.Large and small filter sand composite member 6,4 is the large and small different truncated cone-shaped box-like body of diameter, the sealing of box-like body perisporium, make on the top cover of one and the bottom that has a style of one's own with perisporium and to be evenly equipped with a plurality of filter sand eyelets respectively, device for filling has the multilayer stainless steel cloth in it, and composite member 6,4 external diameters match with interior pipe 3 lower end inner headed faces and tube wall through-hole diameter respectively.

Claims

1, sand filter under a kind of multifunctional well, form by box cupling (1), shading ring (2), interior pipe (3), little filter sand composite member (4), outer tube (5) and big filter sand composite member (6), it is characterized in that: box cupling (1) lower end is by being connected to outer tube (5) in the screw thread, the upper end is provided with shading ring (2) in the outer tube (5), its end face is along circumference and outer tube wall welding, and shading ring (2) inner headed face is connected with interior pipe (3) upper end pin thread by screw thread; In adopt in the dozens of circular hole that is provided with on (3) tube wall of pipe punching press beat colored multiple spot locking mode respectively setting-in be fixed with little filter sand composite member (4), interior pipe upper end adopts the same manner setting-in to be fixed with 1 big filter sand composite member (6).

2, sand filter under the multifunctional well according to claim 1, it is characterized in that, interior pipe (3) upper end band pin thread, lower end inner headed face are provided with a up-small and down-big conical surface and filter, and are uniformly distributed with the through hole that 50-70 inner headed face is provided with step on the body total length tube wall along the circumference.

3, sand filter under the multifunctional well according to claim 1 is characterized in that, outer tube (5) upper/lower terminal is respectively equipped with the standard oil pipe thread, and tube wall upper edge, bottom is evenly distributed in 10-20 pod apertures.

4, sand filter under the multifunctional well according to claim 1, it is characterized in that, large and small filter sand composite member (6), (4) be truncated cone-shaped box-like body different and that match with interior pipe (3) lower end inner headed face and tube wall through-hole diameter respectively for diameter, its perisporium sealing, make on the top cover of one and the bottom that has a style of one's own with perisporium and to be evenly equipped with a plurality of filter sand eyelets respectively, device for filling has the multilayer stainless steel cloth in the box.