CN107120089B - A kind of extruding cup packer of self-balancing - Google Patents
A kind of extruding cup packer of self-balancing Download PDFInfo
- Publication number
- CN107120089B CN107120089B CN201710290557.7A CN201710290557A CN107120089B CN 107120089 B CN107120089 B CN 107120089B CN 201710290557 A CN201710290557 A CN 201710290557A CN 107120089 B CN107120089 B CN 107120089B
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- China
- Prior art keywords
- radial
- hole
- central tube
- self
- sliding sleeve
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/126—Packers; Plugs with fluid-pressure-operated elastic cup or skirt
Abstract
The present invention provides a kind of extruding cup packers of self-balancing, including sequentially connected top connection, central tube, lower contact, it further include self-balancing channel, rubber tube seat, packing element, the first baffle ring are successively arranged outside the central tube from top to bottom, the rubber tube seat lower end and outside are bonded with packing element, the central tube is equipped with radial hydrophthalmia, there is the first annular space between the top and rubber tube seat of the central tube, first annular space is communicated with radial hydrophthalmia, lower part is equipped with sliding sleeve in the central tube, has the second annular space between the packing element top and central tube.It is realized and is opened by chock pressure difference in oil pipe, packer squeezes packing element under pressure is used in oil pipe and realizes one-way sealing, and lower end passes through sliding sleeve closure.Packer design has pressure self-balancing mechanism, and after terminating construction, self-balancing channel can realize automatic opening, and end pressure above and below balance packer avoids negative pressure lock of tool drilling.
Description
Technical field
The invention belongs to oil gas field stimulation technology fields, and in particular to a kind of extruding cup packer of self-balancing.
Background technique
The improved old well of hyposmosis horizontal well of well water-jet staged fracturing complete for casing cementing at present is repeating to change
In making due to Reservoir Section is mined out, whens double envelope single deck tape-recorder selectivity staged fracturings, is easy to form opposite pressure above and below lower packet
If lower envelope is the packer of K344 type negative pressure lock of tool drilling easily occurs for difference.The free shape of self-styled extruding cup packer packing element
It is bonded under state with casing, it is higher to play lower tubular column risk.Y211 packer packing is when rear packer lower section wellbore pressure test, due to upper top
Power is excessive, the problem for easily causing packer sealing not tight.
Summary of the invention
The purpose of the present invention is overcome existing packer that negative pressure bit freezing and poorly sealed technical problem easily occurs.
For this purpose, the present invention provides a kind of extruding cup packer of self-balancing, including sequentially connected top connection, center
Pipe, lower contact further include self-balancing channel, are successively arranged rubber tube seat, packing element, the first baffle ring from top to bottom outside the central tube,
The rubber tube seat lower end and outside are bonded with packing element, and the central tube is equipped with radial hydrophthalmia, the top of the central tube and glue
There is the first annular space between cylinder base, which communicates with radial hydrophthalmia, and lower part is equipped with sliding sleeve, the packing element in the central tube
There is the second annular space between top and central tube；
The self-balancing channel includes the first radial through-hole, the second radial through-hole and third radial through-hole, first diameter
Set on rubber tube seat lower part and circumferentially multiple along rubber tube seat to through-hole, second radial through-hole is set to the second annular space and sliding sleeve
Between and with both communicate, second radial through-hole is uniformly arranged in the circumferential direction multiple, and the third radial through-hole is by same
The first baffle ring through-hole, center pipe through-hole and sliding sleeve through-hole radially forms, and the third radial through-hole is uniformly arranged in the circumferential direction
It is multiple.
The sliding sleeve includes ball seat, the tamponade below ball seat, the spacer ring below tamponade, the tamponade lower part set
Equipped with the second baffle ring, the tamponade be may be axially movable, and the tamponade and sliding sleeve inner wall have gap, and the sliding sleeve end face is equipped with multiple
Axially extending bore, the ball seat top is hollow structure, and is communicated with the second radial through-hole and third radial through-hole.
The sealing sliding sleeve being set on central tube is equipped in first annular space, the sealing sliding sleeve inside and outside circle is provided with
Sealing ring.
Support sleeve is provided on the inside of the rubber tube seat upper section.
The rubber tube seat lower end and outside and packing element joint place angle are 45 ° -60 °.
The central tube is connected through a screw thread with top connection, lower contact, the rubber tube seat be set to central tube top
Outer shoulder cooperation, the two are fixed by shear pin.
The maximum outside diameter of the top connection, rubber tube seat and lower contact is all larger than packing element maximum outside diameter.
The beneficial effects of the present invention are:
The extruding cup packer of this self-balancing provided by the invention can be realized by the chock pressure difference in oil pipe and be opened
It opens, packer squeezes packing element under pressure is used in oil pipe and realizes one-way sealing, and lower end passes through sliding sleeve closure.Packer design has
Pressure self-balancing mechanism, after terminating construction, self-balancing channel can realize automatic opening, and end pressure above and below balance packer avoids
Negative pressure lock of tool drilling.
It is described in further details below in conjunction with attached drawing.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is the A-A cross-sectional view in Fig. 1.
In figure: 1, top connection；2, sliding sleeve is sealed；3, rubber tube seat；4, shear pin；5, the first radial through-hole；6, central tube；7,
Two radial through-hole；8, sliding sleeve；9, packing element；10, the first baffle ring；11, third radial through-hole；12, metal ball；13, tamponade；14, under
Connector；15, the second baffle ring；16, spacer ring；17, guider screw；18, axially extending bore；19, radial hydrophthalmia；20, the first annular space；21,
Second annular space.
Specific embodiment
Embodiment 1:
Present embodiments provide a kind of extruding cup packer of self-balancing, including sequentially connected top connection 1, central tube
6, lower contact 14 further include self-balancing channel, are successively arranged rubber tube seat 3, packing element 9, first gear from top to bottom outside the central tube 6
Ring 10,3 lower end of rubber tube seat and outside are bonded with packing element 9, and the central tube 6 is equipped with radial hydrophthalmia 19, the central tube 6
Top and rubber tube seat 3 between have the first annular space 20, which communicates with radial hydrophthalmia 19, in the central tube 6 under
Portion is equipped with sliding sleeve 8, has the second annular space 21 between 9 top of packing element and central tube 6；
The self-balancing channel includes the first radial through-hole 5, the second radial through-hole 7 and third radial through-hole 11, and described the
One radial through-hole 5 is set to 3 lower part of rubber tube seat and circumferentially multiple along rubber tube seat 3, and second radial through-hole 7 is set to the second ring
Sky 21 and sliding sleeve 8 between and with both communicate, second radial through-hole 7 is uniformly arranged in the circumferential direction multiple, the third diameter
It is made of to through-hole 11 same 10 through-hole of the first baffle ring radially, 6 through-hole of central tube and 8 through-hole of sliding sleeve, the third is radial
Through-hole 11 is uniformly arranged in the circumferential direction multiple.
This packer is lowered into predetermined position together with tubing string, metal ball 12 is thrown, pumps beam body, sliding sleeve 8 in oil pipe
It sets, realizes that packer lower end blocks, fluid enters first between rubber tube seat 3 and central tube 6 through the radial hydrophthalmia 19 of central tube 6
Annular space 20, pushes 3 downlink of rubber tube seat under pressure, and compression packing element 9 realizes sealing.
At the end of pump note, self-balancing channel can realize automatics opening: 12 upper end of metal ball passes through the first radial through-hole 5, the
Two radial through-hole 7 gradually with lower end pressure balance, steel ball sealing failure, packer up and down end pressure by the first radial through-hole 5,
Second radial through-hole 7, third radial through-hole 11, which are realized, to be connected to and gradually balances, and the risk of negative pressure bit freezing is avoided.
The extruding cup packer of self-balancing provided in this embodiment can realize unlatching by the chock pressure difference in oil pipe,
Packer squeezes the realization one-way sealing of packing element 9 under pressure is used in oil pipe, and lower end is blocked by sliding sleeve 8.Packer design has
Pressure self-balancing mechanism, after terminating construction, self-balancing channel can realize automatic opening, and end pressure above and below balance packer avoids
Negative pressure lock of tool drilling.
Embodiment 2:
On the basis of embodiment 1, a kind of extruding leather cup packing of self-balancing as shown in Figure 1 is present embodiments provided
Device, the sliding sleeve 8 includes ball seat, the tamponade 13 below ball seat, the spacer ring 16 set on 13 lower section of tamponade, under the tamponade 13
Portion is arranged with the second baffle ring 15, and the tamponade 13 may be axially movable, and the tamponade 13 and 8 inner wall of sliding sleeve have gap, the sliding sleeve 8
End face is equipped with multiple axially extending bores 18, is hollow structure above the ball seat, and with the second radial through-hole 7 and third radial through-hole
11 communicate.
This packer is lowered into predetermined position together with tubing string, metal ball 12 is thrown, beam body is pumped in oil pipe, through sliding sleeve
8 end face axial through-holes 18 enter tamponade 13 and 16 gap of spacer ring, push up tamponade 13 under pressure, compress metal ball 12
Realize that packer lower end blocks, fluid enters the first annular space between rubber tube seat 3 and central tube 6 through the radial hydrophthalmia 19 of central tube 6
20,3 downlink of rubber tube seat is pushed under pressure, and compression packing element 9 realizes sealing.
Embodiment 3:
On the basis of embodiment 1, a kind of extruding cup packer of self-balancing, first ring are present embodiments provided
The sealing sliding sleeve 2 being set on central tube 6 is equipped in sky 20,2 inside and outside circle of sealing sliding sleeve is provided with sealing ring.Work as liquid
Entered in the first annular space 20 by radial hydrophthalmia 19, sealing ring can be avoided fluid loss, guarantee hydraulic, promotion extruding rubber tube seat 3
Downlink compresses packing element 9.
Support sleeve is provided on the inside of 3 upper section of rubber tube seat.Support sleeve can prevent packing element 9 from inwardly squeezing destruction when compressing.
3 lower end of rubber tube seat and outside and 9 joint place angle of packing element are 45 ° -60 °.
The central tube 6 is connected through a screw thread with top connection 1, lower contact 14, the rubber tube seat 3 be set to central tube 6
The outer shoulder on top cooperates, and the two is fixed by shear pin 4.When liquid is by passing through oil in radial hydrophthalmia 19 the first annular space 20 of entrance
It covers pressure difference and cuts the extruding rubber tube seat 3 of shear pin 4, move down squeeze packing element 9 under pressure.Meanwhile spacer ring 16 can connect with being set to down
Step cooperation in first 14.
It is in the present embodiment, as shown in Fig. 2, radial to just in order to control the second radial through-hole 7, third radial through-hole 11,
The first baffle ring 10, central tube 6 and sliding sleeve 8 can be attached by adjusting screw.Wherein, the second radial through-hole 7, third are radial
11 diameter of through-hole is uniformly arranged three along axial direction.
The maximum outside diameter of the top connection 1, rubber tube seat 3 and lower contact 14 is all larger than 9 maximum outside diameter of packing element.
In conclusion the extruding cup packer of this self-balancing provided by the invention, can pass through the throttling pressure in oil pipe
Difference, which is realized, opens, and packer squeezes packing element 9 under pressure is used in oil pipe and realizes one-way sealing, and lower end passes through sliding sleeve 8 and blocks.Envelope
There is pressure self-balancing mechanism every device design, after terminating construction, self-balancing channel can realize automatic opening, gradually balance on packer
Lower end pressure, avoids negative pressure lock of tool drilling.
The well-known components and common structure of component and the structure category industry that above embodiments do not describe in detail are common
Means do not describe one by one here.
The foregoing examples are only illustrative of the present invention, does not constitute the limitation to protection scope of the present invention, all
It is within being all belonged to the scope of protection of the present invention with the same or similar design of the present invention.
Claims (6)
1. a kind of extruding cup packer of self-balancing, including sequentially connected top connection (1), central tube (6), lower contact
(14), it is characterised in that: further include self-balancing channel, the central tube (6) is successively arranged rubber tube seat (3), glue from top to bottom outside
Cylinder (9), the first baffle ring (10), rubber tube seat (3) lower end and outside are bonded with packing element (9), and the central tube (6) is equipped with diameter
To hydrophthalmia (19), have the first annular space (20) between the top and rubber tube seat (3) of the central tube (6), first annular space (20) with
Radial hydrophthalmia (19) communicates, and the interior lower part of the central tube (6) is equipped with sliding sleeve (8), packing element (9) top and central tube (6) it
Between have the second annular space (21)；
The self-balancing channel includes the first radial through-hole (5), the second radial through-hole (7) and third radial through-hole (11), described
First radial through-hole (5) is set to rubber tube seat (3) lower part and, second radial through-hole (7) circumferentially multiple along rubber tube seat (3)
Between the second annular space (21) and sliding sleeve (8) and with both communicate, second radial through-hole (7) is uniformly arranged in the circumferential direction
Multiple, the third radial through-hole (11) is by same the first baffle ring (10) through-hole, central tube (6) through-hole and sliding sleeve radially
(8) through-hole forms, and the third radial through-hole (11) is uniformly arranged in the circumferential direction multiple；
The sliding sleeve (8) includes ball seat, the tamponade (13) below ball seat, the spacer ring (16) being set to below tamponade (13), institute
It states tamponade (13) lower part to be arranged with the second baffle ring (15), the tamponade (13) may be axially movable, the tamponade (13) and sliding sleeve
(8) inner wall has gap, and sliding sleeve (8) end face is equipped with multiple axially extending bores (18), is hollow structure above the ball seat, and with
Second radial through-hole (7) and third radial through-hole (11) communicate.
2. a kind of extruding cup packer of self-balancing according to claim 1, it is characterised in that: first annular space
(20) the sealing sliding sleeve (2) being set on central tube (6) is equipped in, sealing sliding sleeve (2) inside and outside circle is provided with sealing ring.
3. a kind of extruding cup packer of self-balancing according to claim 1, it is characterised in that: the rubber tube seat (3)
Support sleeve is provided on the inside of upper section.
4. a kind of extruding cup packer of self-balancing according to claim 1, it is characterised in that: the rubber tube seat (3)
Lower end and outside and packing element (9) joint place angle are 45 ° -60 °.
5. a kind of extruding cup packer of self-balancing according to claim 1, it is characterised in that: the central tube (6)
It is connected through a screw thread with top connection (1), lower contact (14), the rubber tube seat (3) and the outer shoulder for being set to central tube (6) top
Cooperation, the two are fixed by shear pin (4).
6. a kind of extruding cup packer of self-balancing according to claim 1, it is characterised in that: the top connection (1),
Rubber tube seat (3) and the maximum outside diameter of lower contact (14) are all larger than packing element (9) maximum outside diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710290557.7A CN107120089B (en) | 2017-04-28 | 2017-04-28 | A kind of extruding cup packer of self-balancing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710290557.7A CN107120089B (en) | 2017-04-28 | 2017-04-28 | A kind of extruding cup packer of self-balancing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107120089A CN107120089A (en) | 2017-09-01 |
| CN107120089B true CN107120089B (en) | 2019-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710290557.7A Active CN107120089B (en) | 2017-04-28 | 2017-04-28 | A kind of extruding cup packer of self-balancing |
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| Country | Link |
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| CN (1) | CN107120089B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116481931B (en) * | 2023-06-26 | 2023-09-22 | 沧州市德泰克钻井装备有限公司 | Multistage blowout preventer shutoff pressure testing device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4583593A (en) * | 1985-02-20 | 1986-04-22 | Halliburton Company | Hydraulically activated liner setting device |
| CN2591221Y (en) * | 2002-10-31 | 2003-12-10 | 大庆油田有限责任公司 | Non-flushable well packer with negative pressure chamber |
| CN102287159A (en) * | 2011-06-28 | 2011-12-21 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Self-balanced packer and method |
| CN202325388U (en) * | 2011-12-01 | 2012-07-11 | 阜新市石油工具厂 | Well-completion type separate stratum fracturing packer |
| CN104653144A (en) * | 2013-11-19 | 2015-05-27 | 中国石油天然气股份有限公司 | Compression packer for washable wells with large pressure difference for oil wells |
-
2017
- 2017-04-28 CN CN201710290557.7A patent/CN107120089B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4583593A (en) * | 1985-02-20 | 1986-04-22 | Halliburton Company | Hydraulically activated liner setting device |
| CN2591221Y (en) * | 2002-10-31 | 2003-12-10 | 大庆油田有限责任公司 | Non-flushable well packer with negative pressure chamber |
| CN102287159A (en) * | 2011-06-28 | 2011-12-21 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Self-balanced packer and method |
| CN202325388U (en) * | 2011-12-01 | 2012-07-11 | 阜新市石油工具厂 | Well-completion type separate stratum fracturing packer |
| CN104653144A (en) * | 2013-11-19 | 2015-05-27 | 中国石油天然气股份有限公司 | Compression packer for washable wells with large pressure difference for oil wells |
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| Publication number | Publication date |
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| CN107120089A (en) | 2017-09-01 |
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Effective date of registration: 20201028 Address after: 100007 Dongcheng District, Dongzhimen, China, North Street, No. 9 Oil Mansion, No. Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Chuanqing Drilling Engineering Co.,Ltd. Address before: 710018 Changqing building, 1203 Changqing Changqing Garden area, Shaanxi, Xi'an Province Patentee before: CHANGQING DOWNHOLE TECHNOLOGY OPERATION COMPANY OF CNPC CHUANQING DRILLING ENGINEERING Co.,Ltd. |