CN206053921U - A kind of self-unsealing successively sand washing layered fracturing pipe string - Google Patents
A kind of self-unsealing successively sand washing layered fracturing pipe string Download PDFInfo
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- CN206053921U CN206053921U CN201620956510.0U CN201620956510U CN206053921U CN 206053921 U CN206053921 U CN 206053921U CN 201620956510 U CN201620956510 U CN 201620956510U CN 206053921 U CN206053921 U CN 206053921U
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Abstract
The utility model discloses a kind of self-unsealing successively sand washing layered fracturing pipe string, including at least two sand blower of sliding sleeve, each sand blower of sliding sleeve is each located on respective interval, and the sand blower of sliding sleeve two ends self solve sealed packer by tubing nipple connection.The sealed packer lower end that self solves of tubing string bottom connects bottom undertaking cylinder by tubing nipple.The sealed packer upper end that self solves of tubing string the top connects hydraulic anchor by tubing nipple, and hydraulic anchor upper end is by tubing nipple attachment security joint, safety joint upper end connected pipes.In the case that this utility model may be implemented in fixed tubular column, 36 sections of piecewise pressure break is realized by pitching；Sanding machine two ends stress balance, need not configure hydraulic anchor, reduce chance card risk；Packer self solves sealed packer for hydraulic control, is unsealed after the completion of pressure break automatically, greatly reduces packer and meets card risk；Double-deck sand blower of sliding sleeve can realize full well backwash function, when tubing string acts difficulty, can wash out sand setting with anti-flushing well, facilitate tubing string to rise.
Description
Technical field
This utility model is related to mechanical delamination fracturing technology tubing string in sleeve pipe, specifically a kind of self-unsealing successively sand washing
Layered fracturing pipe string.
Background technology
Shengli Oil Field hyposmosis alternate thin beds reservoir rich reserves, by 2012 end of the year verified oil oils in place up to 4.72 hundred million
Ton, accounts for the 43.3% of 10.9 hundred million tons of Shengli Oil Field low-permeability oil deposit gross reserves.Such storage cannot be realized using conventional development scheme
The economic producing of layer, the interior mechanical delamination of pipe are low, simple to operate due to its technology maturation, expense, are to dominate layering pressure at present
Split technique.Since 2012, oilfield internal is implemented to manage the nearly 200 mouthfuls of wells of interior mechanical delamination pressure break altogether, achieves preferably transformation effect
Really, but with the continuous increase for adding sand scale, the increase of hierarchy number, problems are exposed in the application of scene, is constrained
The further scale application of the Technology.
Mechanical delamination fracturing packer is mainly by two kinds of expanding and compression at present：Expanding based on K344, hydraulic pressure
Setting, pressure release deblocking；Compression is based on Y341, Y221, Y241, hydraulic base sealed, above propose deblocking.There is glue in inflatable packer
Reclaim after cylinder pressure release not exclusively, the excessive upset that is squeezed of packing element end cause card tubing string, compression packer is due to need to above put forward solution
Envelope, above puies forward deblocking power and causes card tubing string more than equipment lifting ability.Sanding machine mainly adopts monolayer sliding sleeve, and nothing after pitching is opened
Method is closed, and when so allowing for anti-flushing well sand washing, liquid enters oil pipe from the superiors' sanding machine nozzle, it is impossible to by bottom well section
Sand setting is cleaned up, and causes lift pipe string difficult.
Utility model content
The purpose of this utility model is to provide a kind of self-unsealing successively sand washing layered fracturing pipe string, simple structure, operation
Convenient, reliability is high.
In order to reach above-mentioned purpose, this utility model employs following technical scheme, a kind of self-unsealing successively sand washing layering
Fracturing string, including at least two sand blower of sliding sleeve, each sand blower of sliding sleeve are each located on respective interval, the sliding sleeve spray
Sand device two ends self solve sealed packer by tubing nipple connection.
The sealed packer lower end that self solves of tubing string bottom connects bottom undertaking cylinder by tubing nipple.
The sealed packer upper end that self solves of tubing string the top connects hydraulic anchor by tubing nipple, and hydraulic anchor upper end passes through oil pipe
Pipe nipple attachment security joint, safety joint upper end connected pipes.
It is described to self solve sealed packer, including the central canal, piston, lower contact that are sequentially connected from top to bottom, also including connected
The upper cylinder sleeve that connects, lower cylinder sleeve, the upper cylinder sleeve, lower cylinder sleeve are enclosed within piston exterior, and wherein upper cylinder half set upper side is stuck in piston upper surface,
Lower cylinder sleeve lower end is temporarily fixed on lower contact outer wall by shear pin, and packing element, the upper cylinder half set upper side are arranged outside the central canal
It is connected to packing element lower surface；The central canal upper end connects top connection inwall, and the top connection outer wall connects regulation ring, the glue
Cylinder upper end abuts regulation ring lower surface；The lower cylinder sleeve lower end connects pressure ring, and the lower contact upper end opens up evagination land, described
Spring is set between land and pressure ring；Sheath is also set up in the lower contact, the sheath is located at below pressure ring；The central canal
The radial hole towards upper cylinder sleeve is opened up, the radial hole towards lower cylinder sleeve on the piston, is opened up.
The sand blower of sliding sleeve, including body, point lobe sliding sleeve, closedown sliding sleeve, the body opens up radial direction sand jet outlet, described
Divide lobe sliding sleeve to be arranged in chamber body, temporarily block sand jet outlet, the closedown sliding sleeve is also disposed in chamber body, and position
In a point lobe sliding sleeve upper end；Described point of lobe sliding sleeve is temporarily fixed on inner body wall by a point lobe sliding sleeve shear pin, and the closedown sliding sleeve is temporary
When inner body wall is fixed on by closedown sliding sleeve shear pin；Described point of lobe sliding sleeve upper port is taper split body, for accepting pressure break
Ball；The inner body wall opens up expanding groove, and the taper split body of described point of lobe sliding sleeve opens when being slipped to herein and is stuck in expanding groove
It is interior；The closedown sliding sleeve outer wall and inner body wall open up limiting stand, wherein closedown sliding sleeve limiting stand to body limiting stand away from
From more than body limiting stand to sand jet outlet with a distance from, with ensure closedown sliding sleeve landing when can all block sand jet outlet；The sandblasting
Wear resistant spray nozzle is installed at mouthful.
Compared to prior art, this utility model has the advantages that：
(1), in the case that the tubing string may be implemented in fixed tubular column, the piecewise pressure break of 3-6 sections is realized by pitching；
(2) sanding machine two ends stress balance, need not configure hydraulic anchor, reduce chance card risk；
(3) packer self solves sealed packer for hydraulic control, is unsealed after the completion of pressure break automatically, greatly reduces packer and meets card wind
Danger；
(4) double-deck sand blower of sliding sleeve can realize full well backwash function, when tubing string acts difficulty, can be washed out with anti-flushing well
Sand setting, facilitates tubing string to rise.
Description of the drawings
Fig. 1 is a kind of self-unsealing of this utility model successively sand washing layered fracturing pipe string schematic diagram；
Fig. 2 is sand blower of sliding sleeve schematic diagram；
Fig. 3 is to self solve sealed packer schematic diagram.
In figure：11st, oil pipe；12nd, safety joint；13rd, hydraulic anchor；14th, self solve sealed packer；15th, sand blower of sliding sleeve；16、
Accept cylinder in bottom；
21- top connections, 22- regulation rings, 23- central canals, 24- packing elements, the upper cylinder sleeves of 25-, 26- pistons, cylinder sleeve, 28- under 27-
Lower contact, 29 springs, 210 pressure rings, 211 shear pins, 212 sheaths.
1st, top connection；2nd, sealing member；3rd, closedown sliding sleeve shear pin；4th, closedown sliding sleeve；5th, body；6th, divide lobe sliding sleeve；7th, it is wear-resisting
Nozzle；8th, divide lobe sliding sleeve shear pin.
Specific embodiment
Relevant detailed description of the present utility model and technology contents, coordinate description of the drawings as follows, but accompanying drawing only provide ginseng
Examine and purposes of discussion, not for being any limitation as to this utility model.
According to Fig. 1-3, a kind of self-unsealing successively sand washing layered fracturing pipe string, including at least two sand blower of sliding sleeve 15, root
According to drawing, the present embodiment employs three intervals, and each sand blower of sliding sleeve is each located on respective interval, the sliding sleeve sandblasting
Device two ends self solve sealed packer 15 by tubing nipple connection.Tubing string bottom self solve sealed packer lower end by oil pipe it is short
Accept cylinder 16 in section connection bottom.The sealed packer upper end that self solves of tubing string the top connects hydraulic anchor 13, waterpower by tubing nipple
Anchor upper end is by tubing nipple attachment security joint 12, safety joint upper end connected pipes 11.
With regard to self solving sealed packer, including the central canal 23, piston 26, lower contact 28 that are sequentially connected from top to bottom, also wrap
Upper cylinder sleeve 25, the lower cylinder sleeve 27 being connected is included, the upper cylinder sleeve, lower cylinder sleeve are enclosed within piston exterior, and wherein upper cylinder half set upper side is stuck in
Piston upper surface, the lower cylinder sleeve lower end connect pressure ring, and pressure ring 210 is temporarily fixed on 28 outer wall of lower contact by shear pin 211,
Packing element 24 is arranged outside the central canal, the upper cylinder half set upper side is connected to packing element lower surface.In the connection of 23 upper end of the central canal
Inner nosepiece wall, 21 outer wall of top connection connection regulation ring 22, the packing element upper end abuts regulation ring lower surface.The lower contact
Upper end opens up evagination land, and spring 29 is arranged between the land and pressure ring.Sheath 212 is also set up in the lower contact, it is described
Sheath is located at below pressure ring.The central canal opens up the radial hole towards upper cylinder sleeve, is opened up towards lower cylinder sleeve on the piston
Radial hole.
Set：The chock pressure difference produced during by fracturing fluid high speed by sanding machine, in promotion, cylinder sleeve, lower cylinder sleeve are up, pressure
Contracting packing element, sealing sleeve pipe annular space；Deblocking：After pressure release, upper and lower cylinder sleeve resets under the action of the spring, while packing element is returned by natural resiliency
Bullet, removing seal for packer.
Pumping liquid in oil pipe, liquid enter upper cylinder sleeve 25,27 intracavity of lower cylinder sleeve, lower cylinder sleeve from central canal 23, piston 26
211 stress of shear pin of lower end is cut off, while overcoming 29 pressure of spring, in promotion, cylinder sleeve 25, lower cylinder sleeve 27 are up, compresses packing element 24
Expansion on internal surface of sleeve pipe completes to set action；After pressure release, upper cylinder sleeve 25, lower cylinder sleeve 27 reset under the effect of spring 29, while
Packing element 24 leans on natural resiliency resilience, removing seal for packer.
With regard to sand blower of sliding sleeve, including body 5, point lobe sliding sleeve 6, closedown sliding sleeve 4, the body opens up radial direction sand jet outlet,
Described point of lobe sliding sleeve is arranged in chamber body, temporarily blocks sand jet outlet, and the closedown sliding sleeve is also disposed in chamber body,
And it is located at a point lobe sliding sleeve upper end.Described point of lobe sliding sleeve is temporarily fixed on inner body wall by a point lobe sliding sleeve shear pin 8, and the closing is slided
Set is temporarily fixed on inner body wall by closedown sliding sleeve shear pin 3.Described point of lobe sliding sleeve upper port is taper split body, for accepting
Pressure break ball.The inner body wall opens up expanding groove 51, and the taper split body of described point of lobe sliding sleeve opens when being slipped to herein and is stuck in
In expanding groove.The closedown sliding sleeve outer wall and inner body wall open up limiting stand, and wherein closedown sliding sleeve limiting stand is spacing to body
Distance of the distance of platform more than body limiting stand to sand jet outlet, to ensure all block sand jet outlet when closedown sliding sleeve slides.Institute
State installation wear resistant spray nozzle 7 at sand jet outlet.Top connection 1 is connected to body upper end, and top connection also has two sliding sleeves between body
Sealing member is set.
The pressure break ball of respective diameters is put into from well head, small displacement release rises high pressure and cuts off a point lobe to point 6 position of lobe sliding sleeve
Sliding sleeve shear pin 8, promotes point lobe sliding sleeve 6 descending, after exposing sand jet outlet, improves discharge capacity, and it is descending that pressure break ball continues to press on point lobe sliding sleeve 6
To 51 position of expanding groove, a point lobe sliding sleeve opens, and pressure break ball can drop down onto lower floor's sand blower of sliding sleeve under continuing, cut off lower floor's closedown sliding sleeve
Pin 3, promotes the descending closing lower floor sand jet outlet of closedown sliding sleeve 4, while sealing lower floor, starts this layer of sandblasting pressure break.
Coordinate packer, hydraulic anchor, bottom to accept in cylinder lower going-into-well sand blower of sliding sleeve, treat tubing string down to design attitude
Afterwards, the pressure break ball that one sand blower of sliding sleeve of administration interval coordinates, suppresses the shear pin for cutting off all packers, setting all packers；
Continue to rise high pressure, open a point lobe sliding sleeve, ball drops down onto bottom and accepts cylinder, starts fractured interval one；After one pressure break of interval terminates,
The pressure break ball that input is coordinated with two sand blower of sliding sleeve of interval, after opening point lobe sliding sleeve, ball drops down onto the closing of interval one and slides under continuing
Put, seal interval one, start fractured interval two；Repeat this process and complete succeeding layer section pressure break；In the process, fracturing fluid leads to
Cross sanding machine spout and produce chock pressure difference, pressure break ball is in setting state with upper packer, with lower packet due to losing pressure reduction
Automatically unseal；The closedown sliding sleeve that pressure break ball closes the superiors, full well section anti-flushing well are put into finally, you can act fracturing string.
Preferred embodiment of the present utility model is the foregoing is only, is not used to limit the scope of the claims of the present utility model, its
He all should all belong to the scope of the claims of the present utility model with the equivalence changes of patent spirit of the present utility model.
Claims (5)
1. a kind of self-unsealing successively sand washing layered fracturing pipe string, it is characterised in that including at least two sand blower of sliding sleeve, each
Sand blower of sliding sleeve is each located on respective interval, and the sand blower of sliding sleeve two ends connect self-unsealing packing by tubing nipple
Device.
2. a kind of self-unsealing according to claim 1 successively sand washing layered fracturing pipe string, it is characterised in that tubing string bottom
Self solve sealed packer lower end by tubing nipple connect bottom accept cylinder.
3. a kind of self-unsealing according to claim 1 successively sand washing layered fracturing pipe string, it is characterised in that tubing string is topmost
The sealed packer upper end that self solves hydraulic anchor is connected by tubing nipple, hydraulic anchor upper end by tubing nipple attachment security joint,
Safety joint upper end connected pipes.
4. the successively sand washing layered fracturing pipe string of a kind of self-unsealing according to claim 1 or 2 or 3, it is characterised in that described
Self solve sealed packer, including the central canal, piston, lower contact that are sequentially connected from top to bottom, also including the upper cylinder sleeve being connected, under
Cylinder sleeve, the upper cylinder sleeve, lower cylinder sleeve are enclosed within piston exterior, and wherein upper cylinder half set upper side is stuck in piston upper surface, and lower cylinder sleeve lower end leads to
Cross shear pin to be temporarily fixed on lower contact outer wall, outside the central canal, be arranged packing element, the upper cylinder half set upper side is connected under packing element
End face；The central canal upper end connects top connection inwall, and the top connection outer wall connects regulation ring, and the packing element upper end abuts adjusts
Section ring lower surface；The lower cylinder sleeve lower end connects pressure ring, and the lower contact upper end opens up evagination land, the land and pressure ring it
Between spring is set；Sheath is also set up in the lower contact, the sheath is located at below pressure ring；The central canal is opened up towards upper cylinder half
The radial hole of set, opens up the radial hole towards lower cylinder sleeve on the piston.
5. the successively sand washing layered fracturing pipe string of a kind of self-unsealing according to claim 1 or 2 or 3, it is characterised in that described
Sand blower of sliding sleeve, including body, point lobe sliding sleeve, closedown sliding sleeve, the body open up radial direction sand jet outlet, and described point of lobe sliding sleeve is arranged
In chamber body, sand jet outlet is temporarily blocked, the closedown sliding sleeve is also disposed in chamber body, and be located on point lobe sliding sleeve
End；Described point of lobe sliding sleeve is temporarily fixed on inner body wall by a point lobe sliding sleeve shear pin, and the closedown sliding sleeve is temporarily by closing cunning
Set shear pin is fixed on inner body wall；Described point of lobe sliding sleeve upper port is taper split body, for accepting pressure break ball；Described in vivo
Wall opens up expanding groove, and the taper split body of described point of lobe sliding sleeve opens when being slipped to herein and is stuck in expanding groove；Described closing is slided
Set outer wall and inner body wall open up limiting stand, and the distance of wherein closedown sliding sleeve limiting stand to body limiting stand is spacing more than body
Distance of the platform to sand jet outlet, to ensure all block sand jet outlet when closedown sliding sleeve slides；Wear-resisting spray is installed at the sand jet outlet
Mouth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620956510.0U CN206053921U (en) | 2016-08-26 | 2016-08-26 | A kind of self-unsealing successively sand washing layered fracturing pipe string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620956510.0U CN206053921U (en) | 2016-08-26 | 2016-08-26 | A kind of self-unsealing successively sand washing layered fracturing pipe string |
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| CN206053921U true CN206053921U (en) | 2017-03-29 |
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| CN201620956510.0U Active CN206053921U (en) | 2016-08-26 | 2016-08-26 | A kind of self-unsealing successively sand washing layered fracturing pipe string |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109577925A (en) * | 2017-09-28 | 2019-04-05 | 中国石油天然气股份有限公司 | The more cluster fracturing strings of more cluster spray guns, hydraulic jet perforation and technique |
| CN111963135A (en) * | 2020-09-14 | 2020-11-20 | 中国石油集团渤海钻探工程有限公司 | Throttling-free self-service deblocking two-layer fracturing string and fracturing method thereof |
| CN112554856A (en) * | 2020-12-01 | 2021-03-26 | 大庆油田有限责任公司 | Pipe post is pressed to successive layer shutoff formula multilayer seat suitable for big liquid measure |
| CN113027408A (en) * | 2021-05-08 | 2021-06-25 | 山东博赛特石油技术有限公司 | Integrated damping switch layered fracturing device and method |
-
2016
- 2016-08-26 CN CN201620956510.0U patent/CN206053921U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109577925A (en) * | 2017-09-28 | 2019-04-05 | 中国石油天然气股份有限公司 | The more cluster fracturing strings of more cluster spray guns, hydraulic jet perforation and technique |
| CN109577925B (en) * | 2017-09-28 | 2020-12-01 | 中国石油天然气股份有限公司 | Multi-cluster spray gun, hydraulic sand-blasting perforation multi-cluster staged fracturing pipe column and process |
| CN111963135A (en) * | 2020-09-14 | 2020-11-20 | 中国石油集团渤海钻探工程有限公司 | Throttling-free self-service deblocking two-layer fracturing string and fracturing method thereof |
| CN112554856A (en) * | 2020-12-01 | 2021-03-26 | 大庆油田有限责任公司 | Pipe post is pressed to successive layer shutoff formula multilayer seat suitable for big liquid measure |
| CN113027408A (en) * | 2021-05-08 | 2021-06-25 | 山东博赛特石油技术有限公司 | Integrated damping switch layered fracturing device and method |
| CN113027408B (en) * | 2021-05-08 | 2022-09-09 | 山东博赛特石油技术有限公司 | Integrated damping switch layered fracturing device and method |
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