CN112302562A - High-temperature packer for fireflooding - Google Patents
High-temperature packer for fireflooding Download PDFInfo
- Publication number
- CN112302562A CN112302562A CN201910687050.4A CN201910687050A CN112302562A CN 112302562 A CN112302562 A CN 112302562A CN 201910687050 A CN201910687050 A CN 201910687050A CN 112302562 A CN112302562 A CN 112302562A
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- CN
- China
- Prior art keywords
- assembly
- packer
- pipe
- base pipe
- expansion
- 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
- 238000007789 sealing Methods 0.000 claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000012856 packing Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000003129 oil well Substances 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 101100293261 Mus musculus Naa15 gene Proteins 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
- E21B43/243—Combustion in situ
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (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)
- Actuator (AREA)
Abstract
The invention provides a high-temperature packer for fireflooding, which comprises: the pipe wall of the central pipe is provided with a liquid inlet hole; the outer pipe assembly is coaxially sleeved outside the central pipe at intervals, an accommodating cavity is formed between the outer pipe assembly and the central pipe, and the liquid inlet hole is communicated with the accommodating cavity; the piston assembly is slidably arranged in the accommodating cavity, and one end of the piston assembly is positioned at the downstream of the liquid inlet hole; the expansion cylinder is embedded on the outer pipe component; and the expansion assembly is arranged between the expansion cylinder and the central pipe, and the expansion assembly is connected with the other end of the piston assembly. The packer has the beneficial effects that when the internal pressure of the packer is reduced and the external pressure is higher, external high-pressure gas can enter the internal hydraulic cavity of the packer, so that the sealing performance of the packer is ensured.
Description
Technical Field
The invention relates to a high-temperature packer for fireflooding.
Background
Along with the continuous enlargement of the scale of the Liaohe oil field fireflood oil well, the yield of crude oil is continuously improved. The problem of the shaft of the fireflood oil well also appears continuously, and especially the existing thermal recovery packer can not adapt to the requirement of the existing fireflood oil well. The fireflood well is higher at the temperature of initial stage, and the pit shaft temperature can reduce when the fireflood live wire outwards extends, and oil is higher in the pit shaft pressure of fireflood well simultaneously, and current heat sensitive packer can realize better sealed at the higher initial stage of temperature, and can not satisfy the requirement of on-the-spot layering gas injection because the easy deblocking of the reduction heat sensitive packer of temperature at the outside extension section of live wire.
Disclosure of Invention
The invention provides a high-temperature packer for fireflooding, which aims to improve the sealing performance of the packer.
The technical scheme adopted by the invention for solving the technical problems is as follows: a high temperature packer for fireflooding, comprising: the pipe wall of the central pipe is provided with a liquid inlet hole; the outer pipe assembly is coaxially sleeved outside the central pipe at intervals, an accommodating cavity is formed between the outer pipe assembly and the central pipe, and the liquid inlet hole is communicated with the accommodating cavity; the piston assembly is slidably arranged in the accommodating cavity, and one end of the piston assembly is positioned at the downstream of the liquid inlet hole; the expansion cylinder is embedded on the outer pipe component; and the expansion assembly is arranged between the expansion cylinder and the central pipe, and the expansion assembly is connected with the other end of the piston assembly.
Further, the outer tube assembly comprises a hydraulic cylinder and a lock sleeve, one end of the hydraulic cylinder is connected with one end of the lock sleeve, and the other end of the lock sleeve is connected with one end of the expansion cylinder.
Further, the inner wall of lock sleeve is provided with first locked groove, is provided with the first lock tooth with first locked groove complex on the outer wall of piston assembly.
Furthermore, the inner wall of the lock sleeve is provided with a second lock groove, and the outer wall of the piston assembly is provided with a second lock tooth matched with the second lock groove.
Further, the outer wall of center tube is provided with annular protrusion, and annular protrusion separates into center tube and lower center tube with the center tube, and the external diameter of going up the center tube is greater than the external diameter of center tube down, and the bellied external diameter of annular is greater than the external diameter of last center tube.
Furthermore, the lower central tube is sleeved with a lining, and the other end of the piston assembly and the expansion assembly can be located outside the lining.
Furthermore, a pressing cap is fixedly arranged outside the lower central tube, the inner side of the pressing cap is in compression joint with the lining through a sealing ring, and the outer side of the pressing cap is in compression joint with the expansion cylinder.
Further, an end sealing assembly is arranged between the other end of the hydraulic cylinder and the central pipe.
Further, the end sealing assembly comprises a locking cap, a compression ring, a sealing gasket and a blocking body which are sequentially connected.
Further, one end of the central tube is connected with an upper joint.
The packer has the beneficial effects that when the internal pressure of the packer is reduced and the external pressure is higher, external high-pressure gas can enter the internal hydraulic cavity of the packer, so that the sealing performance of the packer is ensured.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Reference numbers in the figures: 1. an upper joint; 2. a central tube; 3. a locking cap; 5. shearing off the pin; 6. a compression ring; 7. a hydraulic cylinder; 8. a gasket; 11. a seal ring; 22. a seal ring; 9. a blocking body; 10. a liquid inlet hole; 12. a piston body; 13. a second locking tooth; 14. a lock sleeve; 141. a first locking groove; 142. a second locking groove; 15. a first locking tooth; 16. an annular projection; 17. a cone; 18. an expansion cylinder; 19. filling a ball; 20. filling the hole; 21. an expansion body; 23. pressing the cap; 24. a bushing.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in FIG. 1, the embodiment of the invention provides a high-temperature packer for fireflooding, which comprises a base pipe 2, an outer pipe assembly, a piston assembly, an expansion cylinder 18 and an expansion assembly. The pipe wall of the central pipe 2 is provided with a liquid inlet hole 10. The outer tube assembly is coaxially arranged outside the central tube 2 at intervals, a containing cavity is formed between the outer tube assembly and the central tube 2, and the liquid inlet hole 10 is communicated with the containing cavity. A piston assembly is slidably disposed within the receiving cavity, one end of the piston assembly being located downstream of the inlet orifice 10. An expansion cylinder 18 is embedded in the outer tube assembly. An expansion assembly is arranged between the expansion cylinder 18 and the base pipe 2, the expansion assembly being connected to the other end of the piston assembly.
The packer can enable outside high-pressure gas to enter the internal hydraulic cavity of the packer when the internal pressure of the packer is reduced and the external pressure is large, so that the sealing performance of the packer is guaranteed.
In the embodiment of the invention, the outer pipe assembly comprises a hydraulic cylinder 7 and a lock sleeve 14, one end of the hydraulic cylinder 7 is connected with one end of the lock sleeve 14, and the other end of the lock sleeve 14 is connected with one end of an expansion cylinder 18. The cylinder 7 is screwed to the lock sleeve 14 and the exterior of its connection is sealed by welding. The inner wall of the lock sleeve 14 is provided with a first lock groove 141 and a second lock groove 142, and the outer wall of the piston assembly is provided with a first lock tooth 15 matched with the first lock groove 141 and a second lock tooth 13 matched with the second lock groove 142.
The first locking teeth 15 and the second locking teeth 13 are arranged, so that the piston assembly can be locked, and displacement caused by overlarge external pressure is avoided.
It should be noted that the piston assembly includes a piston body 12 and a cone 17. The lower part of the cone 17 is contacted with the expansion component, the first locking tooth 15 and the second locking tooth 13 are arranged outside the cone 17, the upper part of the cone 17 is connected with the piston body 12, the sealing ring 11 is arranged at the contact part of the piston body 12, the hydraulic cylinder 7 and the central tube 2, and the cone 17 and the piston body 12 are sleeved outside the central tube 2.
The outer wall of center tube 2 is provided with annular protrusion 16, and annular protrusion 16 separates into upper center tube and lower center tube with center tube 2, and the external diameter of upper center tube is greater than the external diameter of lower center tube, and the external diameter of annular protrusion 16 is greater than the external diameter of upper center tube. Wherein, the outer cover of lower center tube is equipped with bush 24, and piston assembly's the other end and inflation assembly all can be located outside bush 24.
The expansion assembly is arranged outside the lining 24 and comprises an expansion body 21, the expansion body 21 is provided with a filling hole 20 inclined with the central line, a plurality of filling balls 19 are arranged in the expansion body 21, and the filling balls 19 cannot deform.
Preferably, a pressing cap 23 is fixedly arranged outside the lower central tube, the inner side of the pressing cap 23 is in press fit with the bushing 24 through a sealing ring 22, and the outer side of the pressing cap 23 is in press fit with the expansion cylinder 18 (and is welded together).
An end sealing assembly is arranged between the other end of the hydraulic cylinder 7 and the central pipe. The end sealing assembly comprises a locking cap 3, a compression ring 6, a sealing gasket 8 and a baffle body 9 which are connected in sequence. The outer diameter of the lower part of the baffle body 9 is smaller, the outer diameter of the upper part of the baffle body is larger, the baffle body is sleeved inside the upper part of the annular space between the central pipe 2 and the hydraulic cylinder 7, the sealing gasket 8 is sleeved outside the central pipe 2, the pressing ring 6 is connected with the central pipe 2 through threads, and the sealing gasket 8 is further pressed. The locking cap 3 is connected with the central tube 2 through threads and is connected with the compression ring 6 through a shearing pin 5.
Further, one end of the center tube 2 is connected with an upper joint 1. The upper joint 1 is connected with the central pipe 2 through screw threads, and internal threads for connection are turned inside two ends of the upper joint 1.
When the packer is put into a preset position during working, when the external pressure is too large and the internal pressure is reduced, pressure liquid (or high-pressure gas) enters the upper part of the piston body 12 through the liquid inlet hole 10, the piston body 12 moves downwards to drive the cone 17 to move downwards, the liquid cylinder 7 is fixed relative to the central tube 2, the volume of the position of the packing ball 19 is reduced, and meanwhile, the packing ball 19 extrudes the expansion cylinder 18 to expand outwards to achieve a sealing effect as the volume of the packing ball 19 is not changed; the sealing state is now ensured in that the cone 17 remains stationary due to the action of the second locking tooth 13 on the cone 17 and the first locking tooth 15.
When the deblocking is needed, the central tube 2 is lifted upwards to cut the cutting pin 5, at the moment, the central tube 2 drives the anti-loosening cap 3 to move upwards, when the annular bulge 16 is in contact with the piston body 12, the piston body 12 is driven to move upwards, at the moment, the cone 17 also moves upwards along with the piston body, the position volume of the packing ball 19 is increased, the expansion cylinder 18 rebounds because the packing ball 19 loses support, and when the piston body 12 is in contact with the upper part of the hydraulic cylinder 7, the other parts are driven to move upwards, so that the deblocking effect is achieved.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: the packer can enable outside high-pressure gas to enter the internal hydraulic cavity of the packer when the internal pressure of the packer is reduced and the external pressure is large, so that the sealing performance of the packer is guaranteed.
The above description is only exemplary of the invention and should not be taken as limiting the scope of the invention, so that the invention is intended to cover all modifications and equivalents of the embodiments described herein. In addition, the technical features, the technical schemes and the technical schemes can be freely combined and used.
Claims (10)
1. A high temperature packer for fireflooding, comprising:
a central tube (2), the wall of which is provided with a liquid inlet hole (10);
the outer pipe assembly is coaxially sleeved outside the central pipe (2) at intervals, an accommodating cavity is formed between the outer pipe assembly and the central pipe (2), and the liquid inlet hole (10) is communicated with the accommodating cavity;
the piston assembly is slidably arranged in the accommodating cavity, and one end of the piston assembly is positioned at the downstream of the liquid inlet hole (10);
an expansion cylinder (18) embedded in the outer tube assembly;
and the expansion assembly is arranged between the expansion cylinder (18) and the central pipe (2), and is connected with the other end of the piston assembly.
2. A fireflood high temperature packer according to claim 1, characterized in that the outer tube assembly comprises a hydraulic cylinder (7) and a lock sleeve (14), one end of the hydraulic cylinder (7) is connected with one end of the lock sleeve (14), and the other end of the lock sleeve (14) is connected with one end of the expansion cylinder (18).
3. A fireflood high temperature packer as claimed in claim 2, characterized in that the inner wall of the lock sleeve (14) is provided with a first lock groove (141), and the outer wall of the piston assembly is provided with a first lock tooth (15) which is matched with the first lock groove (141).
4. A fireflood high temperature packer as claimed in claim 3, characterized in that the inner wall of the lock sleeve (14) is provided with a second lock groove (142), and the outer wall of the piston assembly is provided with a second lock tooth (13) which is matched with the second lock groove (142).
5. A fireflood high temperature packer according to claim 1, characterized in that the outer wall of the base pipe (2) is provided with an annular protrusion (16), the annular protrusion (16) divides the base pipe (2) into an upper base pipe and a lower base pipe, the outer diameter of the upper base pipe is larger than that of the lower base pipe, and the outer diameter of the annular protrusion (16) is larger than that of the upper base pipe.
6. A fireflood high temperature packer as set forth in claim 5, wherein the lower base pipe jacket is provided with a bushing (24), and the other end of the piston assembly and the expansion assembly can both be located outside of the bushing (24).
7. A high-temperature packer for fireflooding according to claim 6, characterized in that a pressing cap (23) is fixedly arranged outside the lower central tube, the inner side of the pressing cap (23) is in press fit with the lining (24) through a sealing ring (22), and the outer side of the pressing cap (23) is in press fit with the expansion cylinder (18).
8. A fireflood high temperature packer as defined in claim 2, characterized in that an end seal assembly is provided between the other end of the hydraulic cylinder (7) and the base pipe.
9. A high-temperature packer for fireflooding according to claim 8, characterized in that the end seal assembly comprises a locking cap (3), a compression ring (6), a sealing gasket (8) and a baffle (9) which are connected in sequence.
10. A fireflood high temperature packer as claimed in claim 1, characterized in that one end of the base pipe (2) is connected with an upper joint (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910687050.4A CN112302562A (en) | 2019-07-29 | 2019-07-29 | High-temperature packer for fireflooding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910687050.4A CN112302562A (en) | 2019-07-29 | 2019-07-29 | High-temperature packer for fireflooding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112302562A true CN112302562A (en) | 2021-02-02 |
Family
ID=74329824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910687050.4A Pending CN112302562A (en) | 2019-07-29 | 2019-07-29 | High-temperature packer for fireflooding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112302562A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4448427A (en) * | 1983-06-10 | 1984-05-15 | Otis Engineering Corporation | Piston-expanded metallic seal for side door well valve |
| US20050217869A1 (en) * | 2002-04-05 | 2005-10-06 | Baker Hughes Incorporated | High pressure expandable packer |
| CN201908615U (en) * | 2010-12-16 | 2011-07-27 | 中国石油天然气股份有限公司 | Layered steam injection packer |
| US20140076536A1 (en) * | 2012-09-14 | 2014-03-20 | Baker Hughes Incorporated | Multi-Piston Hydrostatic Setting Tool With Locking Feature and a Single Lock for Multiple Pistons |
| CN106285552A (en) * | 2015-05-12 | 2017-01-04 | 中国石油化工股份有限公司 | Self-expansion type thermal recovery bore hole metal packer |
| CN207660585U (en) * | 2017-12-27 | 2018-07-27 | 盘锦奥格威机械制造有限公司 | Elastic claw formula packer in thermal recovery oil well |
-
2019
- 2019-07-29 CN CN201910687050.4A patent/CN112302562A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4448427A (en) * | 1983-06-10 | 1984-05-15 | Otis Engineering Corporation | Piston-expanded metallic seal for side door well valve |
| US20050217869A1 (en) * | 2002-04-05 | 2005-10-06 | Baker Hughes Incorporated | High pressure expandable packer |
| CN201908615U (en) * | 2010-12-16 | 2011-07-27 | 中国石油天然气股份有限公司 | Layered steam injection packer |
| US20140076536A1 (en) * | 2012-09-14 | 2014-03-20 | Baker Hughes Incorporated | Multi-Piston Hydrostatic Setting Tool With Locking Feature and a Single Lock for Multiple Pistons |
| CN106285552A (en) * | 2015-05-12 | 2017-01-04 | 中国石油化工股份有限公司 | Self-expansion type thermal recovery bore hole metal packer |
| CN207660585U (en) * | 2017-12-27 | 2018-07-27 | 盘锦奥格威机械制造有限公司 | Elastic claw formula packer in thermal recovery oil well |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210202 |
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| RJ01 | Rejection of invention patent application after publication |