CN112282690A - Rubber sleeve shoulder has protection architecture and high temperature and high pressure resistant expanding packer - Google Patents
Rubber sleeve shoulder has protection architecture and high temperature and high pressure resistant expanding packer Download PDFInfo
- Publication number
- CN112282690A CN112282690A CN202011159619.9A CN202011159619A CN112282690A CN 112282690 A CN112282690 A CN 112282690A CN 202011159619 A CN202011159619 A CN 202011159619A CN 112282690 A CN112282690 A CN 112282690A
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- Prior art keywords
- ring
- retaining ring
- baffle ring
- elastic claws
- rubber sleeve
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- 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.)
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- 210000000078 claw Anatomy 0.000 claims abstract description 80
- 239000007788 liquid Substances 0.000 claims abstract description 5
- 238000012856 packing Methods 0.000 claims description 21
- 238000005452 bending Methods 0.000 claims description 20
- 230000008093 supporting effect Effects 0.000 claims description 10
- 230000001681 protective effect Effects 0.000 abstract description 4
- 239000003292 glue Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000704 physical effect Effects 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
- E21B33/127—Packers; Plugs with inflatable sleeve
- E21B33/1277—Packers; Plugs with inflatable sleeve characterised by the construction or fixation of the sleeve
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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)
- Gasket Seals (AREA)
- Support Of The Bearing (AREA)
Abstract
A rubber sleeve shoulder has protective structure and resists the high-temperature high-pressure expanding packer, relate to the oil field downhole tool technical field, including center tube and rubber sleeve, the rubber sleeve is installed outside the center tube, both ends of the rubber sleeve are fixed and sealingly connected on center tube, the outside of both ends of the rubber sleeve has a hoop respectively, there are liquid channels with the inner space of rubber sleeve on the center tube correspondingly; an outer baffle ring and an inner baffle ring are arranged between the hoop and the rubber cylinder, the inner baffle ring is sleeved outside the rubber cylinder, the outer baffle ring is sleeved outside the inner baffle ring, and the outer baffle ring and the inner baffle ring are both fixedly connected to the hoop through screws; one end of the outer retaining ring and one end of the inner retaining ring are provided with a plurality of axial cutting seams, the elastic claw on the outer retaining ring is called an outer elastic claw, the elastic claw on the inner retaining ring is called an inner elastic claw, and the outer elastic claw and the inner elastic claw are arranged in an internally and externally staggered mode. The end part of the rubber cylinder is provided with the outer baffle ring and the inner baffle ring, so that the pressure bearing capacity of the expanding packer can be effectively improved.
Description
Technical Field
The invention belongs to the technical field of oilfield downhole tools, and particularly relates to a high-temperature and high-pressure resistant expanding packer with a protective structure on a rubber sleeve shoulder.
Background
In oil production engineering, an expandable packer is a common downhole tool. The expanding packer structurally comprises a central pipe and a rubber cylinder, wherein a liquid passing channel is arranged on the central pipe and corresponds to the inner side space of the rubber cylinder. When the packer is used, the expandable packer is arranged at the lower end of an oil pipe column and is put into a preset depth position of a downhole casing pipe, then the central pipe is pressed, and the rubber sleeve expands under the action of pressure and is attached to the inner wall of the casing pipe, so that the spaces on the upper side and the lower side of the packer are sealed.
In actual use, the lower side of the packer is often required to bear large formation pressure, and the pressure bearing capacity of the packer is completely determined by the structure of the packer and the material of the rubber sleeve. At present, in order to improve the pressure bearing capacity of a packer, technicians mostly concentrate on improving the material of a rubber cylinder, but the improvement of the pressure bearing capacity of the rubber cylinder is limited due to the limitation of physical properties. Therefore, it is necessary to further improve the pressure-bearing capacity of the packer in terms of the packer structure.
Disclosure of Invention
In order to solve the technical problems in the background technology, the invention provides the high-temperature and high-pressure resistant expansion packer with a protective structure on the rubber sleeve shoulder.
The technical problem solved by the invention is realized by adopting the following technical scheme: the invention provides a high-temperature and high-pressure resistant expanding packer with a protective structure at the shoulder part of a rubber cylinder, which comprises a central tube and the rubber cylinder, wherein the rubber cylinder is arranged at the outer side of the central tube;
an outer baffle ring and an inner baffle ring are arranged between the hoop and the rubber cylinder, the inner baffle ring is sleeved outside the rubber cylinder, the outer baffle ring is sleeved outside the inner baffle ring, and the outer baffle ring and the inner baffle ring are both fixedly connected to the hoop through screws;
a plurality of axial cutting seams are arranged at one end of each of the outer retaining ring and the inner retaining ring, and uniformly divide one end of each of the outer retaining ring and the inner retaining ring into a plurality of parts along the circumference, so that a plurality of elastic claws are formed, wherein the elastic claws on the outer retaining ring are called outer elastic claws, the elastic claws on the inner retaining ring are called inner elastic claws, and the outer elastic claws and the inner elastic claws are arranged in an internally-externally staggered manner;
one ends of the outer elastic claw and the inner elastic claw, which face the middle part of the rubber cylinder, are provided with bending parts which are turned outwards;
on outer fender ring and interior fender ring, leave the space between two adjacent elastic claw, when outer fender ring and interior fender ring are extruded to extreme position by the packing element after the inflation, the width of the space between two arbitrary adjacent outer elastic claw is greater than the width of the interior elastic claw that corresponds with this space position.
As a further technical proposal, the method comprises the following steps of. The rubber sleeve is provided with a spring ring corresponding to the bent part, the spring ring is enclosed by a section of cylindrical spring, and the spring ring is vulcanized on the rubber sleeve
As a further technical scheme, arc-shaped support ribs are arranged at the bending parts of the bending parts on the inner elastic claws, the support ribs protrude out of the outer sides of the inner elastic claws, and the width of each support rib is smaller than that of a gap between every two adjacent outer elastic claws;
and one end of the hoop, which is close to the support rib, is provided with a containing groove for containing the support rib.
The invention has the beneficial effects that:
1. when a common expandable packer is used, after the pressure in the casing acts on the rubber sleeve, the rubber sleeve is extruded and deformed by the pressure, and the rubber sleeve has the tendency of flowing into the gap between the hoop and the casing. When pressure is small, the intensity and the toughness of packing element self can guarantee that the packing element can not get into the gap between hoop and the sleeve pipe, nevertheless when pressure reaches the bearing limit of packing element, the packing element just can be torn by the edge of hoop, leads to the sealed inefficacy of packing element. In order to solve the problem, the end part of the rubber cylinder is provided with the outer retaining ring and the inner retaining ring, after the rubber cylinder expands, the elastic claws on the outer retaining ring and the inner retaining ring expand outwards under the compression of the rubber cylinder and finally abut against the inner wall of the sleeve, and when the rubber cylinder is extruded by the pressure in the sleeve, the bent parts on the outer elastic claw and the inner elastic claw jointly form a circular surrounding and retaining structure, so that the rubber cylinder is prevented from entering a gap between the hoop and the sleeve, and the rubber cylinder is prevented from being torn by the edge of the hoop. Therefore, the invention can effectively improve the pressure bearing capacity of the expansion packer.
2. In the invention, when the outer retaining ring and the inner retaining ring are extruded to the limit positions by the expanded rubber cylinder, the width of the gap between any two adjacent outer elastic claws is larger than the width of the inner elastic claw corresponding to the gap position. Under this condition, after the packing element expands and seals, the end of interior elastic claw all holds in the space between the outer elastic claw, makes the kink on interior elastic claw and the outer elastic claw piece into a complete ring, rather than interior elastic claw and outer elastic claw overlap to make the kink on interior elastic claw and the outer elastic claw together carry out all-round, evenly to the packing element and support, the supporting effect is better, is favorable to further improving the bearing capacity of packer.
3. According to the packer, the arc-shaped supporting ribs are arranged at the bending parts of the bending parts, and after the rubber sleeve is expanded and sealed, the supporting ribs just abut against the bottom of the accommodating groove, so that reliable support is provided for the bending parts, and the pressure-bearing performance of the packer is further improved by improving the supporting capacity of the bending parts.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a cross-sectional view at A in FIG. 1;
FIG. 3 is a cross-sectional view taken at A in FIG. 1, showing a second embodiment of the outer and inner retainers;
FIG. 4 is an enlarged view of a portion of FIG. 1 at B;
FIG. 5 is a schematic structural view of an outer retainer ring in accordance with a third embodiment;
fig. 6 is a cross-sectional view at C in fig. 5.
In the figure: 1-central tube, 2-hoop, 3-rubber tube, 4-outer retaining ring, 5-inner retaining ring, 6-spring ring, 7-support rib, 8-holding groove, 9-screw, 10-liquid passing channel, 11-outer elastic claw, 12-inner elastic claw and 13-bending part.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
as shown in figure 1, the glue tube type glue bottle comprises a central tube 1 and a glue tube 3, wherein the glue tube 3 is installed on the outer side of the central tube 1, two ends of the glue tube 3 are fixedly and hermetically connected to the central tube 1, the outer sides of two ends of the glue tube 3 are respectively provided with a hoop 2, and a liquid passing channel 10 is arranged on the central tube 1 and corresponds to the inner space of the glue tube 3. The above is a general structure in the prior art, and is not described herein again.
An outer baffle ring 4 and an inner baffle ring 5 are arranged between the hoop 2 and the rubber cylinder 3, the inner baffle ring 5 is sleeved outside the rubber cylinder 3, the outer baffle ring 4 is sleeved outside the inner baffle ring 5, and the outer baffle ring 4 and the inner baffle ring 5 are both fixedly connected to the hoop 2 through screws 9; one end of each of the outer retaining ring 4 and the inner retaining ring 5 is provided with a plurality of axial cutting seams, the axial cutting seams uniformly divide one end of each of the outer retaining ring 4 and the inner retaining ring 5 into a plurality of parts along the circumference, so that a plurality of elastic claws are formed, wherein the elastic claws on the outer retaining ring 4 are called outer elastic claws 11, the elastic claws on the inner retaining ring 5 are called inner elastic claws 12, and the outer elastic claws 11 and the inner elastic claws 12 are arranged in an internally and externally staggered manner; and one ends of the outer elastic claws 11 and the inner elastic claws 12, which face the middle part of the rubber cylinder 3, are provided with bending parts 13 which are turned outwards.
When a normal expandable packer is used, when the pressure in the casing acts on the rubber sleeve 3, the rubber sleeve 3 is deformed by the pressure and the rubber sleeve 3 has a tendency to flow into the gap between the hoop 2 and the casing. When pressure is less, the intensity and the toughness of packing element 3 self can guarantee that packing element 3 can not get into the gap between hoop 2 and the sleeve pipe, but when pressure reached packing element 3's bearing limit, packing element 3 just can be torn by hoop 2's edge, leads to packing element 3's sealed inefficacy. In order to solve the problem, the end part of the rubber cylinder 3 is provided with the outer retaining ring 4 and the inner retaining ring 5, after the rubber cylinder 3 expands, the elastic claws on the outer retaining ring 4 and the inner retaining ring 5 expand outwards under the pressure of the rubber cylinder 3 and finally abut against the inner wall of the sleeve, and when the rubber cylinder 3 is extruded by the pressure in the sleeve, the bent parts 13 on the outer elastic claw 11 and the inner elastic claw 12 jointly form a circular surrounding and retaining structure, so that the rubber cylinder 3 is prevented from entering a gap between the hoop 2 and the sleeve, and the rubber cylinder 3 is prevented from being torn by the edge of the hoop 2. Therefore, the invention can effectively improve the pressure bearing capacity of the expansion packer.
In the invention, a gap is reserved between two adjacent elastic claws on the outer catch ring 4 and the inner catch ring 5, and when the outer catch ring 4 and the inner catch ring 5 are extruded to the limit position by the expanded rubber cylinder 3, the width of the gap between any two adjacent outer elastic claws 11 is larger than the width of the inner elastic claw 12 corresponding to the gap position. Under this condition, after packing element 3 expanded seal, the end of interior elastic claw 12 all holds in the space between outer elastic claw 11, makes interior elastic claw 12 and the kink 13 on outer elastic claw 11 piece together a complete ring, rather than interior elastic claw 12 and outer elastic claw 11 overlap to make interior elastic claw 12 and the kink 13 on outer elastic claw 11 together carry out all-round, evenly to packing element 3 and support the effect better, be favorable to further improving the bearing capacity of packer.
As a further technical scheme, in order to change the tendency that the rubber cylinder 3 enters the gap between the elastic claws, the spring ring 6 is arranged on the rubber cylinder 3 corresponding to the bending part 13, the spring ring 6 is surrounded by a section of cylindrical spring, and the spring ring 6 is vulcanized on the rubber cylinder 3. The arrangement of the spring ring 6 can effectively prevent the rubber tube 3 from entering the gap between the elastic claws.
As a further technical solution, an arc-shaped support rib 7 is arranged at the bending part of the bending part 13 on the inner elastic claw 12, the support rib 7 protrudes out of the inner elastic claw 12, and the width of the support rib 7 is smaller than the width of the gap between two adjacent outer elastic claws 11. And one end of the hoop 2 close to the support rib 7 is provided with a containing groove 8 for containing the support rib 7. In practice, the support rib 7 may be formed by a stamping process, so that the support rib 7 and the inner elastic claw 12 are integrally formed. In addition, the material of the outer retaining ring 4 and the inner retaining ring 5 is suggested to be spring steel (the specific brand is preferably 65Mn)
According to the invention, the arc-shaped supporting rib 7 is arranged at the bending part of the bending part 13, and after the rubber sleeve 3 is expanded and sealed, the supporting rib 7 just abuts against the bottom of the accommodating groove 8, so that the reliable support is provided for the bending part 13, and the pressure-bearing performance of the packer is further improved by improving the supporting capability of the bending part 13.
Claims (3)
1. The utility model provides a packing element shoulder has protection architecture and high temperature and high pressure resistant expanding packer, includes center tube (1) and packing element (3), and the outside at center tube (1) is installed in packing element (3), and the fixed and sealed connection in both ends of packing element (3) is on center tube (1), and the outside at packing element (3) both ends respectively is provided with a hoop (2), corresponds with packing element (3) inboard space on center tube (1) and is provided with liquid passageway (10), its characterized in that:
an outer baffle ring (4) and an inner baffle ring (5) are arranged between the hoop (2) and the rubber cylinder (3), the inner baffle ring (5) is sleeved on the outer side of the rubber cylinder (3), the outer baffle ring (4) is sleeved on the outer side of the inner baffle ring (5), and the outer baffle ring (4) and the inner baffle ring (5) are both fixedly connected to the hoop (2) through screws (9);
one end of each of the outer retaining ring (4) and the inner retaining ring (5) is provided with a plurality of axial cutting seams, the axial cutting seams uniformly divide one end of each of the outer retaining ring (4) and the inner retaining ring (5) into a plurality of parts along the circumference, so that a plurality of elastic claws are formed, wherein the elastic claws on the outer retaining ring (4) are called outer elastic claws (11), the elastic claws on the inner retaining ring (5) are called inner elastic claws (12), and the outer elastic claws (11) and the inner elastic claws (12) are arranged in an internally-externally staggered manner;
one ends of the outer elastic claw (11) and the inner elastic claw (12) towards the middle part of the rubber cylinder (3) are respectively provided with a bending part (13) which is turned outwards;
a gap is reserved between two adjacent elastic claws on the outer retaining ring (4) and the inner retaining ring (5), and when the outer retaining ring (4) and the inner retaining ring (5) are extruded to the limit position by the expanded rubber cylinder (3), the width of the gap between any two adjacent outer elastic claws (11) is larger than the width of the inner elastic claw (12) corresponding to the gap position.
2. The expansion packer with a rubber sleeve shoulder protection structure and high temperature and high pressure resistance as claimed in claim 1, wherein: the rubber sleeve (3) is provided with a spring ring (6) corresponding to the bending part (13), the spring ring (6) is enclosed by a section of cylindrical spring, and the spring ring (6) is vulcanized on the rubber sleeve (3).
3. The expansion packer with a rubber sleeve shoulder part having a protection structure and resisting high temperature and high pressure as claimed in claim 1 or 2, wherein: arc-shaped supporting ribs (7) are arranged at the bending positions of the bending parts (13) on the inner elastic claws (12), the supporting ribs (7) protrude out of the outer sides of the inner elastic claws (12), and the width of each supporting rib (7) is smaller than that of a gap between every two adjacent outer elastic claws (11);
one end of the hoop (2) close to the support rib (7) is provided with a containing groove (8) used for containing the support rib (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011159619.9A CN112282690B (en) | 2020-10-27 | 2020-10-27 | Expansion packer with protection structure on shoulder of rubber cylinder and high temperature and high pressure resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011159619.9A CN112282690B (en) | 2020-10-27 | 2020-10-27 | Expansion packer with protection structure on shoulder of rubber cylinder and high temperature and high pressure resistance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112282690A true CN112282690A (en) | 2021-01-29 |
| CN112282690B CN112282690B (en) | 2024-09-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011159619.9A Active CN112282690B (en) | 2020-10-27 | 2020-10-27 | Expansion packer with protection structure on shoulder of rubber cylinder and high temperature and high pressure resistance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112282690B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113431518A (en) * | 2021-06-10 | 2021-09-24 | 王文龙 | Step-by-step cable-passing grinding-milling packer |
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| CN202194615U (en) * | 2011-08-25 | 2012-04-18 | 中国石油天然气股份有限公司 | Packer packing element protection architecture |
| US20130192853A1 (en) * | 2010-10-06 | 2013-08-01 | Packers Plus Energy Services Inc. | Wellbore packer back-up ring assembly, packer and method |
| CN103256019A (en) * | 2013-05-08 | 2013-08-21 | 阜新驰宇石油机械有限公司 | Horizontal well dragging crushing high-pressure packer |
| CN104213864A (en) * | 2013-05-30 | 2014-12-17 | 上海优强石油科技有限公司 | Packer rubber cylinder protection device |
| CN204327035U (en) * | 2014-09-25 | 2015-05-13 | 中国石油化工股份有限公司 | A kind of pressure break high pressure resistant packer |
| CN104790902A (en) * | 2015-04-08 | 2015-07-22 | 阜新市石油工具厂 | Protection mechanism of rubber sleeve of expansion type packer, rubber sleeve with protection mechanism and packer |
| CN105114027A (en) * | 2015-08-06 | 2015-12-02 | 东北石油大学 | Flexible self-sealed anti-humeral-protrusion compression packer |
| CN205422627U (en) * | 2016-03-14 | 2016-08-03 | 上海尊优自动化设备有限公司 | Rubber sleeve protection device of packer |
| CN209483282U (en) * | 2018-11-28 | 2019-10-11 | 中国石油天然气股份有限公司 | High-pressure water injection expansion type packer rubber cylinder |
| CN213627521U (en) * | 2020-10-27 | 2021-07-06 | 大庆泰泽机械加工有限公司 | Rubber sleeve shoulder has protection architecture and high temperature and high pressure resistant expanding packer |
-
2020
- 2020-10-27 CN CN202011159619.9A patent/CN112282690B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101338656A (en) * | 2008-08-11 | 2009-01-07 | 张星荣 | High temperature and high pressure resistant compression packer rubber cartridge |
| US20130192853A1 (en) * | 2010-10-06 | 2013-08-01 | Packers Plus Energy Services Inc. | Wellbore packer back-up ring assembly, packer and method |
| CN202194615U (en) * | 2011-08-25 | 2012-04-18 | 中国石油天然气股份有限公司 | Packer packing element protection architecture |
| CN103256019A (en) * | 2013-05-08 | 2013-08-21 | 阜新驰宇石油机械有限公司 | Horizontal well dragging crushing high-pressure packer |
| CN104213864A (en) * | 2013-05-30 | 2014-12-17 | 上海优强石油科技有限公司 | Packer rubber cylinder protection device |
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| CN105114027A (en) * | 2015-08-06 | 2015-12-02 | 东北石油大学 | Flexible self-sealed anti-humeral-protrusion compression packer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113431518A (en) * | 2021-06-10 | 2021-09-24 | 王文龙 | Step-by-step cable-passing grinding-milling packer |
| CN113431518B (en) * | 2021-06-10 | 2022-11-01 | 王文龙 | Step-by-step cable-passing grinding-milling packer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112282690B (en) | 2024-09-20 |
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