CN109113638A - A kind of back-washable inflatable packer - Google Patents
A kind of back-washable inflatable packer Download PDFInfo
- Publication number
- CN109113638A CN109113638A CN201811093181.1A CN201811093181A CN109113638A CN 109113638 A CN109113638 A CN 109113638A CN 201811093181 A CN201811093181 A CN 201811093181A CN 109113638 A CN109113638 A CN 109113638A
- Authority
- CN
- China
- Prior art keywords
- mandrel
- hole
- annular space
- washable
- sheathed
- 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.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 62
- 238000012856 packing Methods 0.000 claims abstract description 29
- 238000007789 sealing Methods 0.000 claims abstract description 24
- 238000011001 backwashing Methods 0.000 claims abstract description 17
- 239000007788 liquid Substances 0.000 claims abstract description 6
- 238000002347 injection Methods 0.000 claims description 25
- 239000007924 injection Substances 0.000 claims description 25
- 238000004026 adhesive bonding Methods 0.000 claims 2
- 239000011229 interlayer Substances 0.000 abstract description 6
- 238000011010 flushing procedure Methods 0.000 abstract description 3
- 238000013517 stratification Methods 0.000 abstract description 2
- 238000004873 anchoring Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B33/127—Packers; Plugs with inflatable sleeve
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Pressure Vessels And Lids Thereof (AREA)
Abstract
The invention discloses a kind of back-washable inflatable packers, including being disposed with top connection from the top down, upper mandrel and lower contact, lower mandrel is arranged in lower contact one end on the upper mandrel, and the lower mandrel is connected through a screw thread with lower contact, and first through hole is provided between the upper mandrel and lower mandrel, it is disposed with backwashing mechanism from left to right between the top connection and lower contact, fill the water bucket, setting mechanism and sealing mechanism, the backwashing mechanism, casing is filled the water to be set on upper mandrel, the setting mechanism and sealing mechanism are sheathed on the lower mandrel, packer is designed using closed self-locking mechanism, after pressure release, packing element does not unseal, interlayer pressure will not interfere with each other, only by above proposing mode, removing seal for packer just can be achieved, the anti-flushing well mechanism of packer design needs certain switch DP that can open, Liquid string stratification caused by interlayer pressure changes phenomenon when can effectively prevent stopping note.
Description
Technical field
The invention belongs to packer technology fields, and in particular to a kind of back-washable inflatable packer.
Background technique
With deepening continuously for waterflooding extraction, it is desirable that water filling starting pressure is higher and higher, and interlayer pressure difference is increasing, therefore
Also higher and higher to the performance requirement of packer, conventional well, which uses, has hydraulic anchor or the water injection packer with slips class
Inter-zonal packing and anchoring string are carried out in this way with the passage of water injection time, due to downhole tool fouling, corrosion and blocking
Etc. reasons, when leading to well workover from packer is highly difficult out or even overhaul, and the design of existing backwashing mechanism is in the lower section of packing element,
There is one section of sand setting pocket on backwash piston, easy sand setting makes backwashing mechanism be not closed completely or act failure.
Summary of the invention
The present invention solves the deficiencies in the prior art, and providing one kind can be with the inflatable packer of backwash.
The technical scheme adopted by the invention is that: a kind of back-washable inflatable packer, including set gradually from left to right
There are top connection, upper mandrel and lower contact, and the upper mandrel is connected through a screw thread with top connection and lower contact, the upper mandrel
It is upper to be arranged with lower mandrel close to lower contact one end, and the lower mandrel is connected through a screw thread with lower contact, and the upper mandrel and
It is provided with first through hole between lower mandrel, is disposed with backwashing mechanism, note between the top connection and lower contact from left to right
Bucket, setting mechanism and sealing mechanism, the backwashing mechanism, water filling casing are set on upper mandrel, the setting mechanism and sealing
Mechanism is sheathed on the lower mandrel, and the backwashing mechanism, water filling bucket, setting mechanism and sealing mechanism adjacent pass through screw thread
Connection, the backwashing mechanism include connection outer cylinder, and described connection outer cylinder one end is sheathed in top connection, and the connection outer cylinder and
It is fixed between top connection by unsealing pin, the other end is sheathed on water filling bucket, is set between the connection outer cylinder and upper mandrel
It is equipped with the first annular space chamber, the first annular space chamber is disposed with upper piston, the first spring and lower piston from left to right, described
Several the first pressure water holes are evenly equipped on first spring circumference corresponding with upper mandrel, the connection outer cylinder is equal close to lower piston one end
It is furnished with several backwash blastholes.
Preferably, the setting mechanism includes positioning tube, and described positioning tube one end is sheathed on the injecting cylinder, another
End cap is set on the sealing mechanism, and the second annular space chamber, the second annular space chamber are provided between the positioning tube and lower mandrel
It is disposed with positioning ring and second spring from left to right.
Preferably, the injecting cylinder is tubular structure, and one end is arranged in first annular space chamber one end, and the lower piston one
End offsets with injecting cylinder upper end, and the contact surface of the lower piston and injecting cylinder is inclined surface, and the injecting cylinder other end is arranged in
Second annular space chamber one end, injecting cylinder inner wall one end are provided with third annular space chamber, and the third annular space chamber is sheathed on lower mandrel
One end, and the third annular space chamber is connected to first through hole, and the second through-hole is symmetrically arranged in the injecting cylinder, described second is logical
Hole is L-type, is provided with the second pressure water hole on the corresponding upper mandrel of second through-hole, and second through-hole is by the second pressure water hole and the
Two annular spaces connect, and are symmetrically arranged with third through-hole in the injecting cylinder, the third through-hole is connected to third annular space chamber.
Preferably, the sealing mechanism includes the high pressure water injection packing element being sheathed on lower mandrel, the high pressure water injection packing element
Both ends are respectively arranged with rubber tube seat and lower rubber cylinder seat, and lower rubber cylinder seat one end is sheathed on high pressure water injection packing element, another
One end is sheathed in lower contact, and Fourth Ring cavity is provided between the high pressure water injection packing element and lower contact, the upper packing element
Seat one end is sheathed on high pressure water injection packing element, and it is connect by screw thread with high pressure water injection packing element, the upper rubber tube seat other end
It is arranged in the second annular space chamber, and the second spring offsets with upper rubber tube seat.
Preferably, fourth hole is provided between the sealing mechanism and lower mandrel.
Preferably, lower contact one end whole body is evenly equipped with several backwash liquid outlets.
Preferably, second through-hole with third through-hole is orthogonal is set in the injecting cylinder.
It is further preferred that the upper mandrel includes first diameter section and second diameter section, the third annular space chamber is close
Top connection one end is first diameter section, and the other end is second diameter section, and the first diameter section diameter is greater than described second
Diameter segment diameter.
Still further preferably, it is arranged on the corresponding lower mandrel of the second spring fluted.
Still more preferably, high pressure water injection packing element surface is provided with several tires lines.
Compared to the prior art, the invention has the benefit that
1, packer is designed using concentric binary channels, and internal channel implementation tool sets and unseals, and annulus access is realized up and down
Interlayer well-flushing function.
2, packer is designed using closed self-locking mechanism, and after pressure release, packing element is not unsealed, and interlayer pressure will not mutually be concerned with
It disturbs, only by above proposing mode, removing seal for packer just can be achieved.
3, the anti-flushing well mechanism of packer design needs certain switch DP that can open, and can effectively prevent stopping interlayer when note
Liquid string stratification caused by pressure changes phenomenon.
4, packing element sealing surfaces design has screw-type seal groove, which can be improved the sealing performance of packer, simultaneously
The distinctive frictional force of the seal groove can integrally provide virtuous anchorage force for packer, prevent from insulating during high pressure water injection
The sliding phenomenon of device occurs.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention；
Fig. 2 is present invention water filling barrel structure schematic diagram.
Specific embodiment
The following describes the present invention in detail with reference to the accompanying drawings and specific embodiments.
A kind of back-washable inflatable packer, refering to fig. 1, including be disposed with from left to right top connection 1, upper mandrel 2,
Lower contact 4, and the upper mandrel 2 is connected through a screw thread with top connection 1, lower contact 4, in 4 one end of lower contact on the upper mandrel 2
It is arranged with lower mandrel 3, and the lower mandrel 3 is connected through a screw thread with lower contact 4, and is set between the upper mandrel 2 and lower mandrel 3
It is equipped with first through hole 9, is disposed with backwashing mechanism 5, water filling bucket 6, seat between the top connection 1 and lower contact 4 from left to right
Sealing mechanism 7 and sealing mechanism 8, the backwashing mechanism 5, water filling bucket 6 are sheathed on mandrel 2, the setting mechanism 7 and sealer
Structure 8 is sheathed on the lower mandrel 3, is passed through mutually between the backwashing mechanism 5, water filling bucket 6, setting mechanism 7 and sealing mechanism 8
It is threadedly coupled, the backwashing mechanism 5 includes connection outer cylinder 52, and described 52 one end of connection outer cylinder is sheathed in top connection 1, and described
It connects and is fixed between outer cylinder 52 and top connection 1 by deblocking pin 51, the other end is sheathed on water filling bucket 6, outside the connection
The first annular space 54 is provided between cylinder 52 and upper mandrel 2, and first annular space 54 is disposed with upper piston 53, the from left to right
One spring 55, lower piston 56 are evenly equipped with several the first pressure water holes 21 on first spring 55 circumference corresponding with upper mandrel 2,
The connection outer cylinder 52 is evenly equipped with several backwash blastholes 57 close to 56 one end of lower piston.The first pressure water hole 21 is in order to flat
Weighing apparatus pressing type prevents from altering on lower piston 56 and causing to unseal.
In order to realize automatic-sealed, refering to fig. 1, the setting mechanism 7 includes positioning tube 74,74 1 end cap of positioning tube
On the injecting cylinder 6, the other end is sheathed on the sealing mechanism 8, is arranged between the positioning tube 74 and lower mandrel 3
There is the second annular space 71, second annular space 71 is disposed with positioning ring 72, second spring 73 from left to right.
Refering to fig. 1, the injecting cylinder 6 is tubular structure, and one end is arranged in 54 one end of the first annular space, and the lower piston
56 one end offset with 6 upper end of injecting cylinder, and the contact surface of the lower piston 56 and injecting cylinder 6 is inclined surface, and the injecting cylinder 6 is another
End is arranged in 71 one end of the second annular space, and described 6 inner wall one end of injecting cylinder is provided with third annular space 64, and the third annular space 64 is arranged
In lower 3 one end of mandrel, and the third annular space 64 is connected to first through hole 9, is symmetrically arranged with the second through-hole in the injecting cylinder 6
63, second through-hole 63 is L-type, and second through-hole 63 corresponds to and is provided with the second pressure water hole 22 on upper mandrel 2, described second
Second pressure water hole 22 is connect with the second annular space 71 by through-hole 63, is symmetrically arranged with third through-hole 62 in the injecting cylinder 6, and described the
Three through-holes 62 are connected to third annular space 64.
Refering to fig. 1, fourth hole 10 is provided between the sealing mechanism 7 and lower mandrel 3, the sealing mechanism 8 includes
The high pressure water injection packing element 82 being sheathed on lower mandrel 3,82 both ends of high pressure water injection packing element are respectively arranged with 81 He of rubber tube seat
Lower rubber cylinder seat 83, and described 83 one end of lower rubber cylinder seat is sheathed on high pressure water injection packing element 82, the other end is sheathed on lower contact 4
On, and the 4th annular space 11 is provided between the high pressure water injection packing element 82 and lower contact 4, described upper 81 one end of rubber tube seat is sheathed on
On high pressure water injection packing element 82, and it is connected through a screw thread, and the other end is arranged in the second annular space 71, and the second spring 73 with
Upper rubber tube seat 81 offsets.
Refering to fig. 1,4 one end of lower contact whole body is evenly equipped with several backwash liquid outlets 41.
Second through-hole 63 with third through-hole 62 is orthogonal is set in the injecting cylinder 6.
The upper mandrel 2 includes first diameter section 23 and second diameter section 24, and the third annular space 64 is close to top connection 1 one
End is first diameter section 23, and the other end is second diameter section 24, and 23 diameter of first diameter section is greater than described second directly
24 diameter of diameter section.
In order to which in deblocking, positioning ring 72 and first diameter section 23 form gap, the corresponding lower mandrel 3 of the second spring 73
Upper setting is fluted.
In order to increase the stability of anchoring, 82 surface of high pressure water injection packing element is provided with several tires lines.
It is setting: high pressure water to be squeezed into upper mandrel, high pressure water enters from the second pressure water hole 22, and passes through the in injecting cylinder 6
Two through-holes 63 enter the second annular space 71, and high pressure water pushes positioning ring 72 to walk downwards, while high pressure water is from 72 two sides of positioning ring
It enters in the second annular space 71, then the high pressure water in the second annular space 71 props up high pressure water injection packing element 82 further through 10, high pressure
Water filling packing element 82 is combined closely with outer sleeve, and after the completion of suppressing, positioning ring 72, will under the repulsion power of second spring 73
The closing of second annular space 71 achievees the effect that automatic setting.First be arranged presses water hole 21 to balance backwashing mechanism and injecting cylinder
Between pressure difference, prevent from unsealing.
Backwash: after the completion of setting, high pressure water is pushed lower piston 56 and injecting cylinder 6 open and is separated, then by injecting cylinder 6
Third through-hole 62, high pressure water pass sequentially through third annular space 64, first through hole 9, backwash liquid outlet 41 and carry out backwash.Such backwash
Process need not be unsealed and just can be completed.
Deblocking: top connection 1 above mentions, and deblocking pin 51 is cut, while upper mandrel 2, lower mandrel 3, the upward fortune of lower contact 4
Dynamic, backwashing mechanism 5, injecting cylinder 6, setting mechanism 7 and sealing mechanism 8 slide relatively downward, and with lower mandrel 3 phase occurs for positioning ring 72
To movement, positioning ring 72 and the sealing of the second annular space 71 are released from, and being mothballed will be from second in the high pressure water in sealing mechanism 8
Water hole 22 is pressed to flow out, high pressure water injection packing element 82 also slowly recycles, and deblocking is completed.
Above-described embodiment, only presently preferred embodiments of the present invention, the practical range being not intended to limit the invention, thus it is all with
The equivalent variations that content described in the claims in the present invention is done should all be included within scope of the invention as claimed.
Claims (10)
1. a kind of back-washable inflatable packer, including be disposed with from left to right top connection (1), upper mandrel (2) and under
Connector (4), and the upper mandrel (2) is connected through a screw thread with top connection (1) and lower contact (4), which is characterized in that the upper core
It is arranged with lower mandrel (3) on axis (2) close to lower contact (4) one end, and the lower mandrel (3) and lower contact (4) are connected by screw thread
Connect, and be provided with first through hole (9) between the upper mandrel (2) and lower mandrel (3), the top connection (1) and lower contact (4) it
Between be disposed with backwashing mechanism (5), water filling bucket (6), setting mechanism (7) and sealing mechanism (8), the backwash machine from left to right
Structure (5), water filling bucket (6) are sheathed on mandrel (2), and the setting mechanism (7) and sealing mechanism (8) are sheathed on the lower mandrel
(3) on, the backwashing mechanism (5), water filling bucket (6), setting mechanism (7) and adjacent of sealing mechanism (8) are connected through a screw thread,
The backwashing mechanism (5) includes connection outer cylinder (52), and described connection outer cylinder (52) one end is sheathed on top connection (1), and described
It connects and is fixed between outer cylinder (52) and top connection (1) by deblocking pin (51), the other end is sheathed in water filling bucket (6), institute
It states and is provided with the first annular space chamber (54) between connection outer cylinder (52) and upper mandrel (2), the first annular space chamber (54) is from left to right
It is disposed with upper piston (53), the first spring (55) and lower piston (56), first spring (55) and upper mandrel (2) are right
It answers and is evenly equipped with several the first pressures water hole (21) on circumference, the connection outer cylinder (52) is close to lower piston (56) if one end is evenly equipped with
Dry backwash blasthole (57).
2. a kind of back-washable inflatable packer according to claim 1, which is characterized in that setting mechanism (7) packet
It includes positioning tube (74), described positioning tube (74) one end is sheathed on the injecting cylinder (6), and the other end is sheathed on the sealer
On structure (8), the second annular space chamber (71), the second annular space chamber (71) are provided between the positioning tube (74) and lower mandrel (3)
It is disposed with positioning ring (72) and second spring (73) from left to right.
3. a kind of back-washable inflatable packer according to claim 2, which is characterized in that the injecting cylinder (6) is pipe
Shape structure, one end are arranged in first annular space chamber (54) one end, and the lower piston (56) one end and injecting cylinder (6) upper end phase
It supports, the contact surface of the lower piston (56) and injecting cylinder (6) is inclined surface, and injecting cylinder (6) other end is arranged in the second ring
Cavity (71) one end, described injecting cylinder (6) inner wall one end are provided with third annular space chamber (64), and the third annular space chamber (64) is arranged
In lower mandrel (3) one end, and the third annular space chamber (64) is connected to first through hole (9), is symmetrical arranged in the injecting cylinder (6)
Have the second through-hole (63), second through-hole (63) is L-type, is provided with the in the second through-hole (63) correspondence on mandrel (2)
Second pressure water hole (22) is connect by two pressures water hole (22), second through-hole (63) with the second annular space (71), the injecting cylinder (6)
It is inside symmetrically arranged with third through-hole (62), the third through-hole (62) is connected to third annular space chamber (64).
4. a kind of back-washable inflatable packer according to claim 3, which is characterized in that sealing mechanism (8) packet
The high pressure water injection packing element (82) being sheathed on lower mandrel (3) is included, high pressure water injection packing element (82) both ends are respectively arranged with gluing
Cylinder base (81) and lower rubber cylinder seat (83), and the lower rubber cylinder seat (83) one end is sheathed on high pressure water injection packing element (82), it is another
End cap is set on lower contact (4), and is provided with Fourth Ring cavity between the high pressure water injection packing element (82) and lower contact (4)
(11), described upper rubber tube seat (81) one end is sheathed on high pressure water injection packing element (82), and it passes through screw thread and high pressure water injection packing element
(82) it connects, upper rubber tube seat (81) other end is arranged in the second annular space chamber (71), and the second spring (73) and gluing
Cylinder base (81) offsets.
5. a kind of back-washable inflatable packer according to claim 4, which is characterized in that the sealing mechanism (7) with
Fourth hole (10) are provided between lower mandrel (3).
6. a kind of back-washable inflatable packer according to claim 5, which is characterized in that described lower contact (4) one end
The whole body is evenly equipped with several backwash liquid outlets (41).
7. a kind of back-washable inflatable packer according to claim 6, which is characterized in that second through-hole (63) with
Third through-hole (62) is orthogonal to be set in the injecting cylinder (6).
8. a kind of back-washable inflatable packer according to claim 7, which is characterized in that the upper mandrel (2) includes
First diameter section (23) and second diameter section (24), the third annular space chamber (64) are first diameter close to top connection (1) one end
Section (23), the other end is second diameter section (24), and first diameter section (23) diameter is greater than the second diameter section
(24) diameter.
9. a kind of back-washable inflatable packer according to claim 8, which is characterized in that the second spring (73) is right
It should descend on mandrel (3) to be arranged fluted.
10. a kind of back-washable inflatable packer according to claim 9, which is characterized in that the high pressure water injection packing element
(82) surface is provided with several tires lines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811093181.1A CN109113638A (en) | 2018-09-18 | 2018-09-18 | A kind of back-washable inflatable packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811093181.1A CN109113638A (en) | 2018-09-18 | 2018-09-18 | A kind of back-washable inflatable packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109113638A true CN109113638A (en) | 2019-01-01 |
Family
ID=64858450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811093181.1A Pending CN109113638A (en) | 2018-09-18 | 2018-09-18 | A kind of back-washable inflatable packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109113638A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110965958A (en) * | 2019-11-26 | 2020-04-07 | 宝鸡瑞林石油机电设备有限责任公司 | Bidirectional seat seal backflow-preventing packer |
| CN111535775A (en) * | 2020-05-21 | 2020-08-14 | 济南鸿泰华丰机械有限公司 | Adjustable constant pressure washable well packer |
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| CN205638341U (en) * | 2016-05-04 | 2016-10-12 | 中国石油天然气股份有限公司 | Water injection packer |
| CN206035441U (en) * | 2016-09-07 | 2017-03-22 | 中国石油化工股份有限公司 | Hydraulic pressure deblocking water injection packer |
| CN209053583U (en) * | 2018-09-18 | 2019-07-02 | 宝鸡瑞林石油机电设备有限责任公司 | A kind of back-washable inflatable packer |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110965958A (en) * | 2019-11-26 | 2020-04-07 | 宝鸡瑞林石油机电设备有限责任公司 | Bidirectional seat seal backflow-preventing packer |
| CN111535775A (en) * | 2020-05-21 | 2020-08-14 | 济南鸿泰华丰机械有限公司 | Adjustable constant pressure washable well packer |
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