CN106522871A - Open hole packer - Google Patents
Open hole packer Download PDFInfo
- Publication number
- CN106522871A CN106522871A CN201510586590.5A CN201510586590A CN106522871A CN 106522871 A CN106522871 A CN 106522871A CN 201510586590 A CN201510586590 A CN 201510586590A CN 106522871 A CN106522871 A CN 106522871A
- Authority
- CN
- China
- Prior art keywords
- inner sleeve
- open hole
- wall
- hole packer
- sleeve pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Earth Drilling (AREA)
- Pipe Accessories (AREA)
Abstract
The invention provides an open hole packer. The open hole packer comprises an inner sleeve, a hydraulic cylinder, a rubber barrel and an end ring, and the hydraulic cylinder, the rubber barrel and the end ring are sequentially arranged on the outer wall of the inner sleeve in series. An annular space is formed between the hydraulic cylinder and the inner sleeve in an enclosed mode. An overflowing hole which can be aligned to the annular space is formed in the wall of a casing pipe and the wall of the inner sleeve. Melting retainer rings are arranged at the two ends of the inner sleeve. The two ends of the inner sleeve are provided with fixing rings matched with the casing pipe. The melting retainer rings are arranged between the fixing rings and the casing pipe. According to the open hole packer, the effects that during casing pipe thermal expansion, the melting retainer rings on the two sides of the packer are melted, and the axial constraint between the casing pipe and the inner sleeve disappears can be ensured, thus, the casing pipe and the inner sleeve can move relatively, and then the effect that the sealing effect of the packer is not affected is ensured.
Description
Technical field
The present invention relates to apply during natural petroleum gas field technical field, more particularly to bore hole staged fracturing
A kind of open hole packer.
Background technology
At present, in oilfield exploitation procedure, the bore hole staged fracturing especially in straight well or horizontal well was transformed
Cheng Zhong, typically carries out sectional well completion and transformation using open hole packer.Can be to oil gas using open hole packer
Each payzone in field takes targetedly modification measures, and for example, increase acid strength or increase sand fracturing are advised
Mould, so that really realize that each payzone Duan Junneng reaches the purpose for effectively releasing nearly well plugging, linking up reservoir.
Open hole packer is segmented one of important tool in reforming technology as barefoot completion, can mainly play envelope
Every the effect of bore hole Reservoir Section.In heavy oil wells, to be heated using high temperature vapourss oil supply layer, and high temperature meeting
Well inner sleeve temperature is made while increasing, as sleeve pipe is very long, therefore the thermal expansion phenomenon of sleeve pipe can not be ignored.
However, existing most of open hole packers are all fixed on sleeve pipe, after setting can with the thermal expansion of sleeve pipe with
Open hole wall produces displacement, affects packing effect, or even can cause packing failure.Simultaneously as oil recovery rank
Section down-hole inevitably produces various problems, needs to carry out well-flushing and workover treatment, and packer is setting shape
Sleeve pipe can be affected under state above proposes operation.
Accordingly, it would be desirable to a kind of new open hole packer with meet deep-well packing during use demand.
The content of the invention
In order to solve above-mentioned part or all of technical problem, a kind of open hole packer of the invention is arranged at sleeve pipe
On outer wall, including inner sleeve and the fluid cylinder being arranged on the outer wall of inner sleeve, packing element and end ring is sequentially connected in series.In liquid
Annular space is between cylinder and inner sleeve, is provided with the flowing hole that can be alignd with annular space on the wall of sleeve pipe and inner sleeve, including
The two ends of set are provided with can melt back-up ring.Preferably, the retainer ring being engaged with sleeve pipe is provided with the two ends of inner sleeve,
It is provided between retainer ring and sleeve pipe and can melts back-up ring.
In this case, when packer is into operation in well, the high-temperature steam injected to down-hole during thermal recovery
Melt the back-up ring positioned at packer both sides, axial constraint between sleeve pipe and inner sleeve disappears so that both can be with
Generation relative motion.Sleeve pipe under the influence of the high temperature of down-hole can occur thermal expansion phenomenon and produce axial displacement, due to
Relative motion can be carried out between sleeve pipe and inner sleeve, it may therefore be assured that relative quiet between packer and open hole wall
Only, so ensure packing effect.I.e., it is possible to ensure that shadow is not received in the packing effect of the packer in sleeve pipe thermal expansion
Ring.
Further, the center in the inwall of packing element is configured with Yi Peng areas.Specifically, Yi Peng areas include arranging
The peripheral region of groove and/or opening and groove and/or opening on the packing element.Thus, at the middle part of packing element
Weak link is defined, when setting power acts on packing element, packing element is expanded first in center so that packing element and well
Sealing between wall is more preferable every envelope effect.
Further, spring is provided with the both sides of packing element.Thus, the anti-lug structure on shell is eliminated, envelope is made
It is isometrical every device outer surface, packer can be avoided to produce and open hole wall between when operation is reclaimed and to be collided with, be affected
Carry on sleeve pipe.
Further, shackle member is provided between end ring and inner sleeve.Specifically, shackle member is embedded inner sleeve convex
Go out the fixture block of its outer wall, be provided with the clamping groove being engaged with fixture block on the inwall of end ring.In the upstream of end ring
Sleeve outer wall be provided with deblocking groove.The oblique of inclined downstream is configured with fixture block near the upstream end of end ring
Face.In this case, when above carrying sleeve pipe, a fixture block up segment distance therewith, is absorbed under packing element squeezing action
In deblocking groove.Axial constraint between fixture block and end ring disappears, and end ring is detached from fixture block along inclined-plane, and
Move downward under the squeezing action of packing element, packing element deblocking.
Further, collar part is provided with the sleeve outer wall in the downstream of end ring.Thus, when packing element and open hole well
Extruding force between wall disappears, and packer unit is integrally slid to box cupling position, it is upper carry sleeve pipe during seal
Well head is reached therewith together every device, realize salvaging and reclaim operation.
It is an advantage of the current invention that：(1) insulate effect good, due to arranging weak link in the middle part of packing element,
Under seating sealing load effect, the seal pack effect between packing element and the borehole wall is preferable.(2) self compensation, well are realized
Lower high temperature melts packer both sides back-up ring, and between sleeve pipe and packer, axial constraint disappears, and both can occur phase
To motion.Therefore can ensure that geo-stationary between packer and open hole wall, it is ensured that packing effect.(3)
Realize that the salvaging of packer is reclaimed, run into well workover, when well-flushing, envelope can be realized by above carrying sleeve pipe
Every the deblocking and recovery of device.
Description of the drawings
Hereinafter the present invention will be described in more detail based on embodiment refer to the attached drawing.Wherein：
Structural representations of the Fig. 1 for the open hole packer of the embodiment of the present invention.
In the accompanying drawings, identical part uses identical reference.Accompanying drawing is not according to actual ratio.
Specific embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in figure 1, open hole packer is arranged on the outer wall of sleeve pipe 15, including being fixedly connected with sleeve pipe 15
Inner sleeve 3 and be sequentially connected in series on the outer wall of inner sleeve 3 and be provided with fluid cylinder 7, packing element 10 and end ring 12.
Upstream annular space and lower lantern control is between fluid cylinder 7 and inner sleeve 3.Set on the wall of sleeve pipe 15 and inner sleeve 3
There is the flowing hole 7 ' that can be alignd with downstream annular space, sealing ring 8 is provided with the both sides of flowing hole 7 '.In upper lantern control
Upper end be provided with anti-back jump ring 6.
In in order to avoid the hot environment in thermal recovery, after packer setting, sleeve pipe 15 is in principle of expanding with heat and contracting with cold
It is lower to produce axial movement and destroy the packing effect of packing element 10.In one particular embodiment of the present invention, will
The two ends of inner sleeve 3 are provided with the retainer ring 2 being engaged with sleeve pipe 15, are provided between retainer ring 2 and sleeve pipe 15
Back-up ring 1 can be melted.In this case, when packer enters heavy duty service, down-hole high temperature is made positioned at packing
The melted back-up ring 1 of device both sides melts, and the axial constraint between sleeve pipe 15 and inner sleeve 3 disappears so that both
Relative motion can occur.Sleeve pipe 15 under the influence of the high temperature of down-hole can occur thermal expansion phenomenon and produce axial position
Move, as relative motion can be carried out between sleeve pipe 15 and inner sleeve 3, it may therefore be assured that packer and bore hole
Geo-stationary between the borehole wall, and then ensure packing effect.
In one particular embodiment of the present invention, the center in the inwall of packing element 10 is configured with Yi Peng areas 16.
Preferably, Yi Peng areas 16 include the groove being arranged on packing element 10 and/or opening and groove and/or opening
Peripheral region.Preferably, a V-groove can be removed in packing element inner diameter central portion band girdle, forms certain weakness
Link.In this case, due to defining certain weak link at the middle part of packing element 10, packer exists
When down-hole sets, affected by down-hole hot environment and the effect of seating sealing load ensure that packing element 10 exists
The Yi Peng areas 16 of center nearby expand, and the center and the borehole wall for making packing element 10 is in close contact, and then makes packing element
Seal pack effect between 10 and the borehole wall is preferable.
In one particular embodiment of the present invention, as shown in figure 1,10 both sides of packing element sulfuration spring 9, saves
The anti-lug structure of 10 shell of packing element, makes packer outer surface isometrical.Thus, it is possible to avoid packer from reclaiming
Colliding with and open hole wall between during operation, affects above carrying for sleeve pipe 15.
In one particular embodiment of the present invention, shackle member is provided between end ring 12 and inner sleeve 3.Preferably,
During shackle member is embedded inner sleeve 3 and protrude inner sleeve 3 outer wall fixture block 13, be provided with the inwall of end ring 12
The clamping groove being engaged with fixture block 13 (depending on not going out).First is respectively equipped with the upper and lower ends of fixture block 13 close
Seal 11 and the second sealing ring 14.Inclined downstream is configured with fixture block 13 near the upstream end of end ring 12
Inclined-plane, during being beneficial to removing seal for packer, fixture block 13 is along inclined-plane slip abjection clamping groove.
In one particular embodiment of the present invention, solution is provided with the outer wall of the sleeve pipe 15 of the upstream of end ring 12
Envelope groove (depending on not going out).Thus, the up segment distance therewith of fixture block 13 when sleeve pipe 15 is above carried, in packing element
It is absorbed under 10 squeezing action in deblocking groove (depending on not going out).Axial constraint between fixture block 13 and end ring 12
Disappear, end ring 12 is detached from fixture block 13 along inclined-plane, and is moved downward under the squeezing action of packing element 10,
Packing element 10 is unsealed.Further, collar part 17 is provided with the outer wall of the sleeve pipe 15 in the downstream of end ring 12.
Thus, when the extruding force between packing element 10 and open hole wall disappears, packer unit is integrally slid to collar part
17, carry packer during sleeve pipe 15 and reach well head therewith together upper, realize salvaging and reclaim operation.
Below the specifically used process of the open hole packer of the present invention is illustrated.
After packer and sleeve pipe 15 reach precalculated position, into sleeve pipe 15 under enter ball seat and the ball that builds the pressure, then
Highly pressurised liquid is injected into sleeve pipe 15 again, start to set.Highly pressurised liquid through flowing hole 7 ' enter fluid cylinder 7 with
Downstream annular space between inner sleeve 3.Can cut after the pressure of the highly pressurised liquid in sleeve pipe 15 increases to a certain extent
The disconnected upper end positioned at fluid cylinder 7 sets shear pin 4, is provided with sealing ring 5 in the both sides for setting shear pin 4.Fluid cylinder 7
Move downward in highly pressurised liquid effect lower edge sleeve pipe 15, extruding packing element 10 shrinks which, the closure well of packing element 10
Wall annular space.Bleed off pressure after persistently building the pressure for a period of time, packing element 10 keeps packing in the presence of anti-back jump ring 6
State, completes to set.
After end is set, back-up ring 1 can be melted in thermal recovery after a period of time in hot environment and be melted, this
When axial constraint between sleeve pipe 15 and packer inner sleeve 3 disappear, sleeve pipe 15 can be carried out relative to packer
Axial free movement.In deep-well or ultradeep well, the sleeve pipe 15 entered due under is longer, and in down-hole, high temperature affects
Setting of casing 15 can produce very big axial deformation.As free axial direction can be realized between sleeve pipe 15 and packer
Motion, so avoids to destroy the packing effect of packer because 15 deflection of sleeve pipe is excessive, Ke Yishi
The self compensation of 15 length of existing sleeve pipe.
When the downhole operations such as well workover or well-flushing are run into, need by removing seal for packer and together with sleeve pipe 15 to carry
Go out well head.The solution of the present invention can realize that operation is reclaimed in the salvaging of packer.Detailed process is：Sleeve pipe is carried above
The up segment distance therewith of fixture block 13 when 15, is absorbed in deblocking groove under the squeezing action of packing element 10 (depending on not going out)
It is interior.Axial constraint between fixture block 13 and end ring 12 disappears, and end ring 12 is detached from fixture block 13 along inclined-plane,
And move downward under the squeezing action of packing element 10, packing element 10 is unsealed.Between packing element 10 and open hole wall
Extruding force disappears, and packer unit integrally slid to collar part 17, it is upper carry sleeve pipe 15 during insulate
Device reaches well head therewith together, realizes salvaging and reclaims.
Although by reference to preferred embodiment, invention has been described, without departing from the scope of the present invention
In the case of, various improvement can be carried out to which and can replace part therein with equivalent.Especially, only
Otherwise there is structural hazard, the every technical characteristic being previously mentioned in each embodiment can have been combined in any way
Come.The invention is not limited in specific embodiment disclosed herein, but including falling within the scope of the appended claims
All technical schemes.
Claims (10)
1. a kind of open hole packer, is arranged on the outer wall of sleeve pipe, it is characterised in that include：
Inner sleeve, is fixedly connected with described sleeve pipe；
Fluid cylinder, packing element and end ring, are sequentially connected in series and are arranged on the outer wall of the inner sleeve；
Annular space is between the fluid cylinder and the inner sleeve, being provided with the wall of described sleeve pipe and inner sleeve can be with institute
State the flowing hole of annular space alignment；Wherein, it is provided with the two ends of the inner sleeve and can melts back-up ring.
2. open hole packer according to claim 1, it is characterised in that be provided with the two ends of the inner sleeve
The retainer ring being engaged with described sleeve pipe, it is described melt back-up ring be arranged on the retainer ring and described sleeve pipe it
Between.
3. open hole packer according to claim 1, it is characterised in that in the inwall of the packing element
Yi Peng areas are configured with portion.
4. open hole packer according to claim 3, it is characterised in that the Yi Peng areas include being arranged at
The peripheral region of groove and/or opening and the groove and/or opening on the packing element.
5. open hole packer according to claim 1, it is characterised in that be provided with the both sides of the packing element
Spring.
6. open hole packer according to claim 1, it is characterised in that in the end ring and the inner sleeve
Between be provided with shackle member.
7. open hole packer according to claim 6, it is characterised in that the shackle member is embedded described
Inner sleeve and protrude the inner sleeve outer wall fixture block, be provided with the inwall of the end ring and be engaged with the fixture block
Clamping groove.
8. open hole packer according to claim 6, it is characterised in that in the fixture block near the end
The upstream end of ring is configured with the inclined-plane of inclined downstream.
9. open hole packer according to claim 1, it is characterised in that in the set of the upstream of the end ring
Pipe outer wall is provided with deblocking groove.
10. open hole packer according to claim 1, it is characterised in that in the downstream of the end ring
Sleeve outer wall is provided with collar part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510586590.5A CN106522871B (en) | 2015-09-15 | 2015-09-15 | A kind of open hole packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510586590.5A CN106522871B (en) | 2015-09-15 | 2015-09-15 | A kind of open hole packer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106522871A true CN106522871A (en) | 2017-03-22 |
| CN106522871B CN106522871B (en) | 2019-04-05 |
Family
ID=58348684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510586590.5A Active CN106522871B (en) | 2015-09-15 | 2015-09-15 | A kind of open hole packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106522871B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003083255A1 (en) * | 2002-03-28 | 2003-10-09 | Rawwater Engineering Company Limited | Sealing method and apparatus |
| CN2702048Y (en) * | 2004-06-22 | 2005-05-25 | 李玉东 | Repeatedly locking and releasing packer |
| US20080128130A1 (en) * | 2006-12-04 | 2008-06-05 | Schlumberger Technology Corporation | System and Method for Facilitating Downhole Operations |
| CA2449664C (en) * | 2001-06-05 | 2010-04-13 | Shell Canada Limited | In-situ casting of well equipment |
| CN101864922A (en) * | 2010-07-02 | 2010-10-20 | 中国石油集团川庆钻探工程有限公司井下作业公司 | Compression type dual-sealing open hole packer |
| CN201756937U (en) * | 2010-07-07 | 2011-03-09 | 沈阳新蓝天科技实业有限公司 | Oil well thermal recovery packer |
| CN201874516U (en) * | 2010-11-13 | 2011-06-22 | 东营市友佳石油机械有限公司 | Sectional well completion packer for thermal production of heavy oil wells |
| CN102518408A (en) * | 2011-12-07 | 2012-06-27 | 中国石油天然气股份有限公司 | Telescopic pressure relief type steam injection packer |
| CN202914019U (en) * | 2012-12-03 | 2013-05-01 | 中国石油集团渤海钻探工程有限公司 | Packer seat sealing mechanism for coiled tubing |
| CN202970607U (en) * | 2012-10-12 | 2013-06-05 | 中国石油天然气股份有限公司 | High-temperature-resistant double-rubber-cylinder water plugging packer for casing change well |
| CN204113198U (en) * | 2014-07-16 | 2015-01-21 | 中国石油天然气股份有限公司 | Temperature control hot washing anti-pollution packer |
| CN104727777A (en) * | 2015-04-04 | 2015-06-24 | 东营百华石油技术开发有限公司 | Temperature-control type hydraulic packer |
-
2015
- 2015-09-15 CN CN201510586590.5A patent/CN106522871B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2449664C (en) * | 2001-06-05 | 2010-04-13 | Shell Canada Limited | In-situ casting of well equipment |
| WO2003083255A1 (en) * | 2002-03-28 | 2003-10-09 | Rawwater Engineering Company Limited | Sealing method and apparatus |
| CN2702048Y (en) * | 2004-06-22 | 2005-05-25 | 李玉东 | Repeatedly locking and releasing packer |
| US20080128130A1 (en) * | 2006-12-04 | 2008-06-05 | Schlumberger Technology Corporation | System and Method for Facilitating Downhole Operations |
| CN101864922A (en) * | 2010-07-02 | 2010-10-20 | 中国石油集团川庆钻探工程有限公司井下作业公司 | Compression type dual-sealing open hole packer |
| CN201756937U (en) * | 2010-07-07 | 2011-03-09 | 沈阳新蓝天科技实业有限公司 | Oil well thermal recovery packer |
| CN201874516U (en) * | 2010-11-13 | 2011-06-22 | 东营市友佳石油机械有限公司 | Sectional well completion packer for thermal production of heavy oil wells |
| CN102518408A (en) * | 2011-12-07 | 2012-06-27 | 中国石油天然气股份有限公司 | Telescopic pressure relief type steam injection packer |
| CN202970607U (en) * | 2012-10-12 | 2013-06-05 | 中国石油天然气股份有限公司 | High-temperature-resistant double-rubber-cylinder water plugging packer for casing change well |
| CN202914019U (en) * | 2012-12-03 | 2013-05-01 | 中国石油集团渤海钻探工程有限公司 | Packer seat sealing mechanism for coiled tubing |
| CN204113198U (en) * | 2014-07-16 | 2015-01-21 | 中国石油天然气股份有限公司 | Temperature control hot washing anti-pollution packer |
| CN104727777A (en) * | 2015-04-04 | 2015-06-24 | 东营百华石油技术开发有限公司 | Temperature-control type hydraulic packer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106522871B (en) | 2019-04-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2607832C2 (en) | Disconnecting tool | |
| CN103184850B (en) | Two-way setting hanging packer and preparation method thereof and pit shaft hoop packing method | |
| CN102691486A (en) | Casing hanger lockdown slip ring | |
| CN103573210A (en) | Quick drill composite pipe bridge plug | |
| EP3390768B1 (en) | Connectors for high temperature geothermal wells | |
| CN109139099B (en) | Filling, sand prevention and steam injection integrated device and operation method thereof | |
| CN202866741U (en) | Expanding open hole packer with hydraulic control lock | |
| US10724326B2 (en) | Downhole repairing system and method of use | |
| CN105064947A (en) | Recyclable hydraulic production packer | |
| CN205025420U (en) | Combined action layered steam drive packer | |
| CN106522907A (en) | Salvageable thermal production well pipe string and application method thereof | |
| CN106522871A (en) | Open hole packer | |
| CN105178906A (en) | Combined action layered steam drive packer | |
| CN203626705U (en) | Side-drilling slim hole fracturing packer | |
| CN108590577B (en) | Electric ignition layered gas injection valve and layered electric ignition tubular column | |
| CN203441435U (en) | Steam distribution valve capable of twice ball throwing | |
| CN215860026U (en) | Rotatable telescopic short section and acid fracturing well completion pipe string | |
| CN211950429U (en) | Packer for steam injection of heavy oil well | |
| CN208152979U (en) | A kind of bi-directional slip formula external casing packer | |
| CN204266982U (en) | A kind of heating power is bored into formula packer | |
| CN209908454U (en) | Isolation packer device of novel sealing structure for thickened oil thermal production well | |
| CN111485844B (en) | Continuous plugging construction method for multi-section leakage points of oil-water well | |
| CN108729895B (en) | Multistage fracturing tool of sleeve pipe ball seat | |
| CN107939304B (en) | A kind of support of earth cuttings and packing device | |
| CN109869112A (en) | A kind of bi-directional slip formula external casing packer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |