CN112127829A - Compression packer packing element with deformation element - Google Patents
Compression packer packing element with deformation element Download PDFInfo
- Publication number
- CN112127829A CN112127829A CN201910840503.2A CN201910840503A CN112127829A CN 112127829 A CN112127829 A CN 112127829A CN 201910840503 A CN201910840503 A CN 201910840503A CN 112127829 A CN112127829 A CN 112127829A
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- Prior art keywords
- rubber cylinder
- rubber
- deformation
- shoulder
- ring
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- 230000006835 compression Effects 0.000 title claims abstract description 18
- 238000007906 compression Methods 0.000 title claims abstract description 18
- 238000012856 packing Methods 0.000 title claims description 11
- 239000002184 metal Substances 0.000 claims abstract description 18
- 244000241796 Christia obcordata Species 0.000 claims abstract description 16
- 238000001125 extrusion Methods 0.000 claims description 9
- 238000003825 pressing Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 abstract description 16
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 210000000003 hoof Anatomy 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
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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
- E21B33/128—Packers; Plugs with a member expanded radially by axial pressure
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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)
Abstract
The invention provides a compression packer rubber cylinder with a deformation element, which comprises a rubber cylinder and an anti-outburst pressure ring, wherein the rubber cylinder is arranged between a central pipe and a sleeve, flanges are arranged at two sides of the rubber cylinder, metal elastic rings are vulcanized at the inner sides close to an upper shoulder and a lower shoulder respectively, the metal elastic rings form a deformation cavity with a hoof-shaped outline by an expansion section and a pressure-bearing section, and the metal elastic rings deform outwards after being pressed, so that the deformation of the rubber cylinder is supported and compensated, and the contact pressure of a sealing surface is increased. The anti-outburst pressure ring is arranged on the upper shoulder and the lower shoulder of the rubber cylinder, the outer edge of the anti-outburst pressure ring is composed of a shoulder neck on the outer side and two sections of butterfly wings close to the rubber cylinder, the highest position of each butterfly wing is of an arc-shaped protruding structure, axial annular grooves are formed in the end portions, close to the rubber cylinder, of the inner edge of the anti-outburst pressure ring, the anti-outburst pressure ring is matched with flanges at two ends of the rubber cylinder, a pressurizing gap is formed in the axial direction. The rubber cylinder has the advantages of simple structure, strong elastic compensation capability, long sealing performance, capability of effectively preventing the shoulder protrusion phenomenon generated during the operation of the rubber cylinder and long service life.
Description
Technical Field
The invention relates to a compression packer for high-pressure fracturing in a petroleum exploitation well, in particular to a compression packer rubber barrel with a deformation element.
Background
The compression type packer is the most widely used packer type in the oil exploitation process, and provides effective guarantee for normal production of oil exploitation and smooth implementation of various underground process measures. The rubber sleeve is a core component of the packer for playing a role in sealing annular space, isolating a production layer and the like, and the performance of the rubber sleeve directly influences the success rate and the production cost of petroleum production process measures or not. When the sealing ring works, under the action of an axial load, the rubber cylinder is axially pressed and radially expands and deforms, and the annular gap is sealed by the contact stress generated between the rubber cylinder and the sleeve pipe and the central pipe. When the traditional barrel-shaped rubber barrel is pressed, the middle radial deformation is large, the two ends deformation is small, the effective sealing width is small, and the shoulder stress concentration of the rubber barrel under high pressure easily causes the shoulder protrusion phenomenon, so that the sealing performance and the service life of the rubber barrel are influenced.
Disclosure of Invention
The invention aims to overcome the defects of the existing barrel-shaped rubber barrel, provides the compression type packer rubber barrel with the deformation element, improves the contact stress and the actual sealing width at two ends of the rubber barrel, can effectively avoid shoulder projection damage caused by the stress concentration phenomenon of the shoulder part of the rubber barrel, and improves the sealing performance and the service life of the rubber barrel.
The technical problem to be solved by the invention is realized by the following technical scheme:
a compression packer packing element with a deformation element comprises a packing element between a central pipe and a sleeve and an anti-outburst pressure ring sleeved at the upper end part and the lower end part of the packing element. Flanges are arranged on two sides of the rubber cylinder, metal elastic rings are vulcanized on the inner sides close to the upper shoulder and the lower shoulder, and each metal elastic ring is a deformation cavity consisting of an expansion section and a pressure-bearing section. The outer edge of the anti-outburst and anti-outburst pressure ring sleeved on the upper end portion and the lower end portion of the rubber cylinder is composed of a shoulder neck section on the outer side and a butterfly wing section on the inner side, the inner edge of the anti-outburst pressure ring is radially provided with a semicircular groove in a matching portion with the rubber cylinder flange, and is matched with the flanges at two ends of the rubber cylinder and provided with a pressurizing gap in the axial direction.
Furthermore, the metal elastic ring is a deformed cavity with a profile formed by an expansion section and a pressure-bearing section, and the shape of the metal elastic ring is in a hoof shape. The deformation of expanding outward after the pressurized, supplementary and support the deformation of packing element, contact pressure on the contact surface of increase packing element both ends increases effective sealing width, improves sealed dependability.
Furthermore, the included angle between the pressure-bearing section and the expansion section of the metal elastic ring is theta, and theta is more than or equal to 120 degrees and less than or equal to 140 degrees; the width of the deformation cavity is B, and B is more than or equal to 40 and less than or equal to 55.
Furthermore, prevent protruding clamping ring outer fringe by the shoulder neck section in the outside with inboard butterfly wing section constitute, the butterfly wing highest point is circular-arc protruding structure, outstanding circular arc structure can effectively prevent extruding of packing element shoulder material during high pressure, improves the life of packing element.
Furthermore, the circular arc of the outer edge butterfly wing section of the anti-protruding pressure ring is 4mm-4.15mm higher than the outer diameter of the rubber sleeve. The anti-protruding pressure ring is matched with the flanges at the two ends of the rubber cylinder, and a pressurizing gap is axially arranged, so that the installation and uniform pressurization are facilitated.
Furthermore, a semicircular groove is radially formed in the matching part of the inner edge of the anti-extrusion ring and the rubber cylinder flange, and the butterfly wing section on the outer edge of the anti-extrusion ring generates large deformation during loading.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the metal elastic ring is designed into a horseshoe-shaped deformation cavity structure, and is vulcanized at the inner sides close to the two ends of the rubber cylinder, and the deformation is expanded outwards after bearing pressure, so that the deformation capacity at the two ends of the rubber cylinder is enhanced, the effective sealing width of the rubber cylinder is improved, and the sealing reliability of the rubber cylinder is improved.
The highest position of the butterfly wing section of the outer edge of the outburst prevention pressure ring, which is close to the shoulder part of the rubber cylinder, is of an arc-shaped protruding structure, so that the outburst of rubber cylinder materials under high pressure can be prevented, a complete continuous surface support is provided for the end part of the rubber cylinder, and the rubber cylinder is protected from oil gas erosion to a great extent.
The inner edge of the anti-extrusion ring is provided with a semicircular groove at the matching part with the rubber cylinder flange, so that a butterfly wing section at the outer edge of the anti-extrusion ring can generate larger deformation when being subjected to axial load, the extrusion of a material at the shoulder part of the rubber cylinder is prevented, and the service life of the rubber cylinder is prolonged. The anti-extrusion ring is matched with the flanges at the two ends of the rubber cylinder, and a pressurizing gap is axially arranged, so that the installation and uniform pressurization are facilitated.
Drawings
Fig. 1 is a schematic structural view of the present invention. Reference numbers and corresponding part names in the drawings:
1-central tube, 2-sleeve, 3-rubber tube, 4-metal elastic ring, 5-expansion section, 6-pressure-bearing section, 7-anti-protrusion pressure-proof ring, 8-butterfly wing section, 9-semicircular groove, 10-shoulder neck section and 11-pressurizing gap.
Detailed Description
The implementation of the invention is further explained with the attached drawings.
As shown in figure 1, the compression packer rubber sleeve with the deformation element comprises a rubber sleeve 3 between a central pipe 1 and a sleeve 2 and an anti-bulge pressing ring 7 sleeved at the upper end part and the lower end part of the rubber sleeve 3. Flanges are arranged on two sides of the rubber cylinder 3, metal elastic rings 4 are vulcanized on the inner sides close to the upper shoulder and the lower shoulder, and the metal elastic rings 4 are deformation cavities consisting of expansion sections 5 and pressure-bearing sections 6. The outer edge of an anti-protruding and anti-protruding pressure ring 7 sleeved on the upper end portion and the lower end portion of the rubber barrel 3 is composed of a shoulder neck section 10 on the outer side and a butterfly wing section 8 on the inner side, a semicircular groove 9 is radially arranged on the inner edge of the anti-protruding pressure ring 7 at the matching portion with the rubber barrel flange, the inner edge of the anti-protruding pressure ring is matched with the flanges at the two ends of the rubber barrel, and a pressurizing gap 11 is axially arranged.
The metal elastic ring 4 is a deformed cavity with a profile formed by an expansion section 5 and a pressure-bearing section 6, and the shape of the deformed cavity is a hoof shape. The included angle between the pressure-bearing section and the expansion section of the metal elastic ring is theta, and theta is more than or equal to 120 degrees and less than or equal to 140 degrees; the width of the deformation cavity is B, and B is more than or equal to 40 and less than or equal to 55. The deformation chamber is pressed and is deformed to the outer expansion, the deformation of the rubber cylinder 3 is assisted and supported, the contact pressure on the contact surfaces at the two ends of the rubber cylinder 3 is increased, the effective sealing width is increased, and the sealing reliability is improved.
The outer edge of the anti-bulge compression ring 7 consists of a shoulder neck section 10 on the outer side and a butterfly wing section 8 on the inner side, the highest position of the butterfly wing is of an arc-shaped bulge structure, and the arc of the butterfly wing section 8 on the outer edge is 4mm-4.15mm higher than the outer diameter of the rubber sleeve 3. The protruding arc structure can effectively prevent the extrusion of the shoulder material of the rubber cylinder 3 at high pressure, and the service life of the rubber cylinder is prolonged. And the pressurizing gap 11 is arranged at the matching part of the anti-bulge compression ring 7 and the flanges at the two ends of the rubber cylinder 3, so that the installation and the uniform pressurization are facilitated.
In conclusion, the compression type packer rubber cylinder with the deformation element has the advantages of compact structure and reasonable design, effectively solves the problems that the contact stress of the sealing surface is reduced and the upper end part and the lower end part of the sealing rubber cylinder protrude or even extrude into the annular space in the long-time underground working process of the packer rubber cylinder, and improves the reliability and the sealing capability of the rubber cylinder in the high-temperature and high-pressure underground working environment.
Claims (6)
1. The compression packer rubber barrel with the deformation element is characterized by comprising a rubber barrel (3) between a central pipe (1) and a sleeve (2) and an anti-bulge pressing ring (7) sleeved at the upper end part and the lower end part of the rubber barrel (3). Flanges are arranged on two sides of the rubber cylinder (3), metal elastic rings (4) are vulcanized on the inner sides close to the upper shoulder and the lower shoulder, and the metal elastic rings (4) are deformation chambers formed by expansion sections (5) and pressure-bearing sections (6). The outer fringe of the outburst-prevention and outburst-prevention pressure ring (7) sleeved on the upper end portion and the lower end portion of the rubber cylinder (3) is composed of a shoulder neck section (10) on the outer side and a butterfly wing section (8) on the inner side, the outburst-prevention pressure ring (7) is provided with a semicircular groove (9) in the radial direction of a flange matching portion of the rubber cylinder (3), and is matched with flanges at two ends of the rubber cylinder (3) and provided with a pressurizing gap (11) in the axial direction.
2. A compression packer rubber according to claim 1, characterised in that the metal spring ring (4) is a deformation chamber, which is profiled by an expansion section (5) and a pressure section (6), and which is "shoe-shaped" in its outer shape.
3. A compression packer rubber according to claim 1, characterised in that the angle between the pressure-bearing section (6) and the expansion section (5) of the metal elastic ring (4) is θ, θ being 120 ° or more and 140 ° or less; the width of the deformation cavity is B, and B is more than or equal to 40 and less than or equal to 55.
4. A compression packer rubber sleeve with deformation elements according to claim 1, characterised in that the outer-edge inner butterfly wing section (8) of the anti-bulge loop (7) is of a circular arc-shaped projection.
5. A compression packer rubber with deformation element according to claim 1, characterised in that the arc of the outer edge butterfly wing section (8) of the anti-extrusion ring (7) is 4mm-4.15mm higher than the outer diameter of the rubber cylinder (3). The protruding-prevention pressing ring (7) is provided with a semicircular groove (9) in the radial direction of the flange matching part of the rubber cylinder (3) and is matched with flanges at two ends of the rubber cylinder.
6. A compression packer packing element with deformation elements, according to claim 1, characterised in that the inner edge of the anti-extrusion ring (7) is provided with a semi-circular groove (9) in the radial direction of the engagement with the flange of the packing element (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910840503.2A CN112127829A (en) | 2019-09-06 | 2019-09-06 | Compression packer packing element with deformation element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910840503.2A CN112127829A (en) | 2019-09-06 | 2019-09-06 | Compression packer packing element with deformation element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112127829A true CN112127829A (en) | 2020-12-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910840503.2A Pending CN112127829A (en) | 2019-09-06 | 2019-09-06 | Compression packer packing element with deformation element |
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| CN (1) | CN112127829A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114658386A (en) * | 2022-05-24 | 2022-06-24 | 纬达石油装备有限公司 | Expansion packer and using method thereof |
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|---|---|---|---|---|
| US20070044977A1 (en) * | 2005-08-23 | 2007-03-01 | Schlumberger Technology Corporation | Packer |
| CN201778750U (en) * | 2010-08-12 | 2011-03-30 | 中国石油天然气股份有限公司 | Suspension compression fracture packer |
| CN103184850A (en) * | 2011-12-29 | 2013-07-03 | 安东石油技术（集团）有限公司 | Bidirectional seat seal hook-wall packer, preparation method thereof and shaft circumferential packing method |
| CN203685115U (en) * | 2013-10-17 | 2014-07-02 | 北京一龙恒业石油工程技术有限公司 | Rubber tube protruding prevention ring for permanent packer |
| CN204327037U (en) * | 2014-11-18 | 2015-05-13 | 沈有明 | A kind of packer with anti-convex spacer ring |
| CN106121580A (en) * | 2016-06-24 | 2016-11-16 | 成都维泰油气能源技术有限公司 | A kind of High Temperature High Pressure soluble metal sealing drum |
| CN205743826U (en) * | 2016-07-14 | 2016-11-30 | 成都若克石油技术开发有限公司 | A kind of packing element for high-pressure packer |
| CN106639964A (en) * | 2017-03-10 | 2017-05-10 | 西南石油大学 | High leakproofness shoulder-protrusion resistant compression type packer |
| CN211342868U (en) * | 2019-09-06 | 2020-08-25 | 天津科技大学 | Compression packer packing element with elastic element |
-
2019
- 2019-09-06 CN CN201910840503.2A patent/CN112127829A/en active Pending
Patent Citations (9)
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|---|---|---|---|---|
| US20070044977A1 (en) * | 2005-08-23 | 2007-03-01 | Schlumberger Technology Corporation | Packer |
| CN201778750U (en) * | 2010-08-12 | 2011-03-30 | 中国石油天然气股份有限公司 | Suspension compression fracture packer |
| CN103184850A (en) * | 2011-12-29 | 2013-07-03 | 安东石油技术（集团）有限公司 | Bidirectional seat seal hook-wall packer, preparation method thereof and shaft circumferential packing method |
| CN203685115U (en) * | 2013-10-17 | 2014-07-02 | 北京一龙恒业石油工程技术有限公司 | Rubber tube protruding prevention ring for permanent packer |
| CN204327037U (en) * | 2014-11-18 | 2015-05-13 | 沈有明 | A kind of packer with anti-convex spacer ring |
| CN106121580A (en) * | 2016-06-24 | 2016-11-16 | 成都维泰油气能源技术有限公司 | A kind of High Temperature High Pressure soluble metal sealing drum |
| CN205743826U (en) * | 2016-07-14 | 2016-11-30 | 成都若克石油技术开发有限公司 | A kind of packing element for high-pressure packer |
| CN106639964A (en) * | 2017-03-10 | 2017-05-10 | 西南石油大学 | High leakproofness shoulder-protrusion resistant compression type packer |
| CN211342868U (en) * | 2019-09-06 | 2020-08-25 | 天津科技大学 | Compression packer packing element with elastic element |
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| 姜向敏: "压缩式密封胶筒密封性能及可靠性设计研究", 《工程科技Ⅰ辑》, no. 2, pages 19 - 21 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114658386A (en) * | 2022-05-24 | 2022-06-24 | 纬达石油装备有限公司 | Expansion packer and using method thereof |
| CN114658386B (en) * | 2022-05-24 | 2022-08-05 | 纬达石油装备有限公司 | Expansion type packer and using method thereof |
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