CN205918407U - Double -barrelled water injection level pressure formula screen pipe - Google Patents

Abstract

The utility model discloses a double -barrelled water injection level pressure formula screen pipe, including center tube, sieve mesh cover, piston, the annular space that the sieve mesh ways just formed outside the center tube between the two is as the piston chamber, the piston is installed and is separated into epicoele and cavity of resorption at the piston intracavity and the piston chamber, the piston passes through the shear pin temporarily to be fixed at the center tube outer wall, the radial limbers with superior connectivity is seted up to the center tube upper end, radial sieve mesh of seting up with the cavity of resorption intercommunication is sheathe in to the sieve mesh. The top connection is all connected simultaneously to center tube and sieve mesh cover upper end, and the lower clutch is then connected simultaneously to the lower extreme. The utility model discloses a compression packer setting is accomplished in order realizing the not having high -efficient seperated layer water injection of throttle to screen pipe constant pressure start up's mode, provides safeguard for the mentally deficient high -efficient reliable seperated layer water injection of double -barrelled tubular column.

Description

Two-tube water filling constant-pressure type screen casing

Technical field

This utility model is related to two-tube water injection well completion construction downhole tool, specifically two-tube water filling constant-pressure type sieve Pipe.

Background technology

Double pipe stratified injection water tubing string adopts dual pathways water filling alone, can realize ground by water filling flow process and allocate down-hole in real time Each laminar flow amount it is adaptable to hole deviation and the big dually completed injector of interlayer pressure difference, solve dispensing well survey adjust that difficulty is big, dispensing rate and layer The section low problem of qualification rate.But conventional two-tube tubing string is many realizes in the way of diverter and expansion envelope coordinate and set oil-separating layer Dispensing, then occurs in the injecting process and causes because water nozzle is little water filling throttling big and interlayer pressure difference leads to greatly expansion envelope to set deficiency The problems such as.Thus, pressure can be started by level pressure screen casing piston and completes by the way of level pressure screen casing is combined with compression packer Compression packer sets, and realizes big flow and no throttle water filling.

Utility model content

The purpose of this utility model is to provide two-tube water filling constant-pressure type screen casing, is completed by the way of screen casing constant pressure start Compression packer sets with high-efficiency layered water filling of realizing no throttling, and provides for two-tube tubing string mental retardation high efficient and reliable seperated layer water injection and protects Barrier.

In order to reach above-mentioned purpose, this utility model employs following technical scheme, two-tube water filling constant-pressure type screen casing, including Central canal, sieve aperture set, piston, the annular space that described sieve aperture set is enclosed within outside central canal and is formed between the two is as plunger shaft, institute State piston to be arranged on piston intracavity and plunger shaft is separated into epicoele and cavity of resorption, described piston is temporarily fixed to center by shear pin Pipe outer wall, described central canal upper end opens up the limbers of the radial direction connecting with epicoele, and described sieve aperture is put to open up and connected with cavity of resorption Radial direction sieve aperture.

Described central canal and sieve aperture set upper side are all simultaneously connected with top connection, and lower end is then simultaneously connected with lower contact.

Described top connection lower end threadedly connects central canal, and top connection upper end female thread is tubing thread screw thread, under End inside thread is trapezoidal thread, smears anaerobic adhesive with central canal before threadeding simultaneously；Described top connection lower end outside and interior Be respectively provided with aprons slot above the screw thread of side lower end, inside top connection cushion rubber and the cooperation of center pipe outer wall interference seal, outside cushion rubber with Sieve aperture set inwall interference seal cooperation.

Described lower contact lower end external screw thread is tubing thread screw thread, inside upper end and outside screw is trapezoidal thread, described Anaerobic adhesive is smeared in lower contact with central canal before threadeding, be connected with sieve aperture external threading simultaneously and install the uniform anti-rotation of ring Nail；It is provided with aprons slot, pipe outer wall interference seal cooperation in cushion rubber center inside lower contact below described lower contact inner top side screw thread.

Described central canal top is provided with the protrusion sealing station of shear pin groove, is provided with uniform straight of ring above sealing station Footpath 15mm circle limbers；Described sieve aperture set is provided with 8 row's sieve apertures of 4 uniform diameter 10mm of ring in the axial direction, and goes up most Row's sieve aperture should be located at below piston.

Inside described piston and Outboard Sections are respectively provided with aprons slot and install cushion rubber, inside piston, cushion rubber and central canal protrude Sealing station interference seal coordinates, cushion rubber and sieve aperture set inwall interference seal cooperation outside piston；Described upper piston area is provided with a ring To the shear pin of uniform diameter 8mm, piston is fixedly connected with central canal shear pin groove by shear pin.

Compared to prior art, this utility model has the advantages that

Complete compression packer by the way of screen casing constant pressure start to set, and big flow is no in the form of many eyelets screen casing Throttling water filling, solve conventional screen because no pressure limiting cannot individually with packer with the use of and diverter rushed because of water nozzle little Yi Deteriorate bad the problems such as it is achieved that oil field mental retardation high efficient and reliable seperated layer water injection.

Brief description

Fig. 1 is the structural representation of this utility model two-tube water filling constant-pressure type screen casing；

Fig. 2 is this utility model concrete application figure.

In figure: top connection 1, cushion rubber 2, central canal 3, cushion rubber 4, piston 5, shear pin 6, cushion rubber 7, cushion rubber 8, cushion rubber 9, cushion rubber 10th, sieve aperture set 11, anti-rotation nail 12, cushion rubber 13, lower contact 14, sleeve pipe 15, outer tube 16, inner tube 17, compression packer 18, level pressure sieve Pipe 19, close insert 20, sealing drum 21, compression packer 22, level pressure screen casing 23, plug 24.

Specific embodiment

Relevant detailed description of the present utility model and technology contents, cooperation brief description is as follows, but accompanying drawing only provides ginseng Examine and purposes of discussion, be not used for this utility model is any limitation as.

According to Fig. 1, two-tube water filling constant-pressure type screen casing, described piston 5 is enclosed within central canal 3, and described piston 5 is provided with o shape glue Circle 7,8,9,10, and is connected with central canal 3 shear pin 6, described central canal 3 upper and lower ends respectively threaded top connection 1 and under connect 14, described lower contact 14 is threadeded with sieve aperture set 11, and described sieve aperture covers 11 upper ends and is enclosed within top connection 1 seal section.

Described central canal 3 top is provided with the protrusion sealing station of shear pin groove, is provided with 4 rings uniform above sealing station Diameter 15mm circle limbers.

Described central canal 3 upper and lower side outside screw is trapezoidal thread, connects top connection 1 and lower contact 14 respectively.

Described piston 5 body portion inner side and Outboard Sections are respectively provided with aprons slot, piston 5 inner side cushion rubber 7,10 and central canal 3 protrude the cooperation of sealing station interference seal, piston 5 outside cushion rubber 8,9 and sieve aperture set 11 inwall interference seal cooperation.

Described piston 5 top is provided with the shear pin 6 of the uniform diameter 8mm of 8 rings, and piston 5 is cut with central canal 3 by shear pin 6 Nail groove is fixedly connected.

Described sieve aperture set 11 is provided with 8 row's sieve apertures of 4 uniform diameter 10mm of ring in the axial direction, and go up row's sieve aperture most should It is located at below piston 5.

It is trapezoidal thread that described sieve aperture covers 11 lower end screw threads, threadeds and install the uniform anti-rotation of ring with lower contact 14 Nail 12.

Described top connection 1 lower end threadedly connects central canal 3, and top connection 1 upper end female thread is tubing thread screw thread, Lower end inside screw thread is trapezoidal thread, smears appropriate anaerobic adhesive with central canal 3 before threadeding simultaneously.

Be respectively provided with aprons slot above described top connection 1 lower end outside and inside lower end screw thread, top connection 1 inner side cushion rubber 2 with Central canal 3 outer wall interference seal coordinates, and outside cushion rubber 4 is coordinated with sieve aperture set 11 inwall interference seal

Described lower contact 14 lower end external screw thread is tubing thread screw thread, inside upper end and outside screw is trapezoidal thread, its Smear appropriate anaerobic adhesive before threadeding with central canal 3, threaded and the uniform anti-rotation of ring is installed with sieve aperture set 11 simultaneously Nail 12.

It is provided with aprons slot, lower contact 14 inner side cushion rubber 13 central canal 3 outer wall below described lower contact 14 inner top side screw thread Interference seal coordinates.

According to Fig. 1 and Fig. 2, during operation field construction, press operation technique dual-string completion design of string pipe first, in sleeve pipe 15 Interior, enter down successively with plug 24, level pressure screen casing 23, compression packer 22, sealing drum 21, level pressure screen casing 19, compression packer 18 outer tube tubing string 16, then be lowered into close slotting 20 in sealing drum 21 with inner tube tubing string 17, complete inner tube 17 and outer tube 16 liquor stream The separation of passage.Beat hydraulic pressure to 18mpa and voltage stabilizing 5min in well head outer tube 16 with inner tube 17 annulus access, complete compression packing Device 18 packing element sets, and is further continued for suppressing and cuts off to the shear pin 6 of the piston 5 of level pressure screen casing 19 to 20mpa, and piston 5 is subject to hydraulic pressure masterpiece With falling to lower contact 14 top, the 8 row's sieve apertures conceded carry out water filling；Then, beat hydraulic pressure extremely in well head inner tube 17 passage 18mpa voltage stabilizing 5min, complete compression packer 22 packing element and set, and are further continued for suppressing the piston 5 to 20mpa to level pressure screen casing 23 Shear pin 6 cut off, piston 5 is fallen to lower contact 14 top by action of hydraulic force, and the 8 row's sieve apertures conceded carry out water filling.Packer 18th, 22 set operation after the completion of, you can according to water injection well injection allocation require, by Well head flow path effusion meter adjust inner and outer pipes 17,16 The corresponding upper oil reservoir water injection rate of annulus access and the corresponding lower oil-bearing stratum flooding amount of inner tube 17 passage, realize the fine high efficient injection of each oil reservoir Water.

The foregoing is only preferred embodiment of the present utility model, be not used to limit the scope of the claims of the present utility model, its He uses the equivalence changes of patent spirit of the present utility model, all should all belong to the scope of the claims of the present utility model.

Claims (6)

1. it is characterised in that including central canal, sieve aperture set, piston, described sieve aperture set is enclosed within center to two-tube water filling constant-pressure type screen casing As plunger shaft, described piston is arranged on piston intracavity and plunger shaft is separated into the annular space being formed outside pipe and between the two Chamber and cavity of resorption, described piston is temporarily fixed to center pipe outer wall by shear pin, and described central canal upper end is opened up and connected with epicoele The limbers of radial direction, described sieve aperture puts the sieve aperture opening up the radial direction connecting with cavity of resorption.

2. two-tube water filling constant-pressure type screen casing according to claim 1 is it is characterised in that described central canal and sieve aperture set upper side All it is simultaneously connected with top connection, lower end is then simultaneously connected with lower contact.

3. two-tube water filling constant-pressure type screen casing according to claim 2 is it is characterised in that screw thread is passed through in described top connection lower end Mode connects central canal, and top connection upper end female thread is tubing thread screw thread, and lower end inside screw thread is trapezoidal thread, simultaneously with center Pipe screw thread smears anaerobic adhesive before connecting；It is respectively provided with aprons slot above described top connection lower end outside and inside lower end screw thread, above connect Head inner side cushion rubber and the cooperation of center pipe outer wall interference seal, outside cushion rubber and sieve aperture set inwall interference seal cooperation.

4. two-tube water filling constant-pressure type screen casing according to claim 2 is it is characterised in that described lower contact lower end external screw thread is Tubing thread screw thread, inside upper end and outside screw is trapezoidal thread, described lower contact is smeared before being threadeded with central canal and is detested Oxygen glue, is connected simultaneously and installs the uniform anti-rotation nail of ring with sieve aperture external threading；Set below described lower contact inner top side screw thread There is aprons slot, pipe outer wall interference seal cooperation in cushion rubber center inside lower contact.

5. two-tube water filling constant-pressure type screen casing according to claim 1 is it is characterised in that described central canal top is provided with The protrusion sealing station of shear pin groove, is provided with the uniform diameter 15mm circle limbers of a ring above sealing station；Described sieve aperture is enclosed within Axial direction is provided with 8 row's sieve apertures of 4 uniform diameter 10mm of ring, and goes up row's sieve aperture most and should be located at below piston.

6. two-tube water filling constant-pressure type screen casing according to claim 5 is it is characterised in that inside described piston and Outboard Sections It is respectively provided with aprons slot and cushion rubber is installed, inside piston, cushion rubber and central canal protrude the cooperation of sealing station interference seal, glue outside piston Circle and sieve aperture set inwall interference seal cooperation；Described upper piston area is provided with the shear pin of a ring uniform diameter 8mm, and piston passes through to cut Nail is fixedly connected with central canal shear pin groove.