CN110735612A - double-acting ultrahigh-pressure clamping and sealing rubber cylinder - Google Patents
double-acting ultrahigh-pressure clamping and sealing rubber cylinder Download PDFInfo
- Publication number
- CN110735612A CN110735612A CN201911089227.7A CN201911089227A CN110735612A CN 110735612 A CN110735612 A CN 110735612A CN 201911089227 A CN201911089227 A CN 201911089227A CN 110735612 A CN110735612 A CN 110735612A
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- China
- Prior art keywords
- rubber
- rubber cylinder
- support ring
- cylinder
- sealing
- 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
- 229920001971 elastomer Polymers 0.000 title claims abstract description 99
- 238000007789 sealing Methods 0.000 title claims abstract description 36
- 239000012530 fluid Substances 0.000 claims abstract description 13
- 238000002347 injection Methods 0.000 claims description 25
- 239000007924 injection Substances 0.000 claims description 25
- 229920002545 silicone oil Polymers 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000007493 shaping process Methods 0.000 claims description 2
- 230000002265 prevention Effects 0.000 claims 5
- 239000003921 oil Substances 0.000 abstract description 32
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052710 silicon Inorganic materials 0.000 abstract description 6
- 239000010703 silicon Substances 0.000 abstract description 6
- 230000000903 blocking effect Effects 0.000 abstract description 4
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000004073 vulcanization 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
- E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
-
- 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
- E21B33/1285—Packers; Plugs with a member expanded radially by axial pressure by fluid pressure
-
- 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
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
- E21B33/134—Bridging plugs
Landscapes
- 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 relates to double-acting ultrahigh pressure blocking rubber cylinder for sealing an annular space between an inner pipe column of a well and the well in the well, which structurally comprises an upper support ring, a lower support ring, an upper rubber cylinder, a middle rubber cylinder, a lower rubber cylinder, an anti-bulge ring, a central pipe, a rubber liner, incompressible fluid (silicon oil) and an oil filling nozzle.
Description
Technical Field
The invention relates to types of blocking and sealing rubber cylinders for sealing an annular space between a well string and a well shaft in the well shaft, in particular to types of double-acting ultrahigh-pressure blocking and sealing rubber cylinders.
Background
The sealing rubber tube used in oil field exploitation mainly includes two types of expansion type and compression type, in which the principle of expansion type rubber tube is that hydraulic force acts on the inner cavity of rubber tube to make the diameter of rubber tube be enlarged to implement sealing, but said rubber tube has the defects of short sealing time, small pressure difference and small sealing pressure, and the principle of compression type rubber tube is that after the rubber material is stressed, it produces large displacement and large deformation, and utilizes the axial compression to make it produce radial expansion so as to make the well wall be fitted with well wall to obtain the effect of sealing well section.
Therefore, how to effectively improve the working performance and the service life of the compression type rubber cylinder is the technical difficulty at present, the invention provides double-acting ultrahigh-pressure clamping and sealing rubber cylinders based on the Pascal law (namely, the pressure applied to the sealed liquid can be transmitted to all directions by the liquid unchanged in size), so as to solve the problems of the sealing rubber cylinders in the oil field exploitation.
Disclosure of Invention
The invention aims to provide double-acting ultrahigh-pressure clamping and sealing rubber cylinders by combining the advantages of an expansion rubber cylinder and a compression rubber cylinder so as to solve the problems of the sealing rubber cylinders in oilfield exploitation.
The invention adopts the following technical scheme that double-acting ultrahigh pressure clamping and sealing rubber cylinders structurally comprise an upper supporting ring, a lower supporting ring, an upper rubber cylinder, a middle rubber cylinder, a lower rubber cylinder, an anti-protrusion ring, a central tube, a rubber liner, incompressible fluid (silicon oil) and an oil injection nozzle, wherein the inner arc surface of the upper rubber cylinder is attached to the outer arc surface of the upper part of the middle rubber cylinder, the outer arc surface of the lower part of the middle rubber cylinder is attached to the inner arc surface of the lower rubber cylinder, the upper rubber cylinder, the middle rubber cylinder and the lower rubber cylinder jointly form a sealing mechanism, a force transmission mechanism comprises the rubber liner, the incompressible fluid (silicon oil) and the oil injection nozzle, the force transmission mechanism is positioned in a closed inner cavity formed by the sealing mechanism and the central tube, the incompressible fluid (silicon oil) fills the inner space of the rubber liner, the anti-protrusion mechanism comprises an upper anti-protrusion ring and a lower anti-protrusion ring, the upper supporting ring and the anti-protrusion ring are both sleeved on the central tube, the upper end surface of the upper supporting ring is attached to the upper end surface of the lower rubber liner, and the upper end surface of the lower rubber liner is attached to the lower end surface of the lower.
holes are punched at the top of the outer side of the rubber liner, the oil injection nozzle is inserted into the holes, the circular rubber pad at the top of the oil injection nozzle is adhered to the surface skin of the rubber liner, and then the rubber liner is inflated to be vulcanized and shaped.
The oil injection nozzle is provided with a vertical oil injection seam from top to bottom, the center of the top is provided with a semicircular groove, and the periphery of the top is provided with a circular rubber pad.
The invention has the beneficial effects that: the invention is based on the Pascal principle, and the force transmission mechanism is arranged in the sealing mechanism, so that the advantages of long sealing time, large working pressure difference bearing capacity, large sealing pressure and the like can be achieved, and the problems of shoulder cracks and damages caused by overlarge axial displacement can be solved.
Drawings
Fig. 1 is a schematic structural diagram of a double-acting ultrahigh-pressure clamping and sealing rubber cylinder.
FIG. 2 is a schematic view of the structure of the oil nozzle of the present invention.
In the figure: 1-upper supporting ring, 2-anti-protrusion ring, 3-upper rubber cylinder, 4-oil injection nozzle, 5-rubber liner, 6-middle rubber cylinder, 7-incompressible fluid (silicone oil), 8-central tube, 9-lower rubber cylinder, and 10-lower supporting ring.
Detailed Description
In order to clearly understand the objects, technical solutions and advantages of the present invention, the following will be described with reference to the following embodiments, but the embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.
Referring to fig. 1, according to embodiments of the invention, double-acting ultrahigh-pressure clamping and sealing rubber cylinders structurally comprise an upper supporting ring 1, a lower supporting ring 10, an upper rubber cylinder 3, a middle rubber cylinder 6, a lower rubber cylinder 9, an anti-protrusion ring 2, a central tube 8, a rubber liner 5, an incompressible fluid (silicone oil) 7 and an oil injection nozzle 4, wherein an inner arc surface of the upper rubber cylinder 3 is attached to an outer arc surface of the upper part of the middle rubber cylinder 6, an outer arc surface of the lower part of the middle rubber cylinder 6 is attached to an inner arc surface of the lower rubber cylinder 9, the upper rubber cylinder 3, the middle rubber cylinder 6 and the lower rubber cylinder 9 jointly form a sealing mechanism, the force transmission mechanism comprises the rubber liner 5, the incompressible fluid (silicone oil) 7 and the oil injection nozzle 4, the force transmission mechanism is located in a sealed inner cavity formed by the sealing mechanism and the central tube 8, the incompressible fluid (silicone oil) 7 is filled in the inner space of the rubber liner 5, the anti-protrusion mechanism comprises the upper anti-protrusion ring 2 and the lower anti-protrusion ring 2, the upper supporting ring 1 and the anti-protrusion ring 2 are sleeved on the upper end surface of the central tube 8, the upper supporting ring 2 is in contact with the anti-protrusion ring 2, the lower end surface of the central tube, the upper end surface of the central tube 2 is attached to the lower end surface of the lower.
The anti-bulge ring 2 is made of polytetrafluoroethylene materials, and the upper rubber cylinder 3, the middle rubber cylinder 6 and the lower rubber cylinder 9 are made of nitrile rubber materials. The rubber liner 5 and the oil injection nozzle 4 are made of butyl rubber materials, and the incompressible fluid is silicone oil.
Referring to fig. 2, in the double-acting ultrahigh pressure blocking rubber cylinder, the oil injection nozzle 4 is provided with a vertical oil injection seam from top to bottom, the center of the top is provided with a semicircular groove for guiding an oil injection needle to be inserted into the oil injection seam, and the periphery of the top is provided with a circular rubber pad.
holes are punched at the top of the outer side of the rubber liner 5, the oil injection nozzle 4 is inserted into the holes, the circular rubber pad at the top of the oil injection nozzle 4 is adhered to the surface of the rubber liner 5, and the oil injection nozzle 4 is inserted into the air needle to inflate the rubber liner 5 and put into a vulcanizing machine for vulcanization and shaping.
During oil injection, the oil injection needle is inserted into the oil injection nozzle 4, the rubber liner 5 is vacuumized, then silicone oil is injected until the rubber liner is full, quantitative silicone oil is continuously injected to form pre-pressure, finally the oil injection needle is pulled out, and the oil injection seam is closed under the hydraulic action.
When the sealing device works, axial pressures are firstly applied to the sealing device, the axially applied pressures are transmitted to the incompressible fluid (silicon oil) 7 through the upper rubber cylinder 3 and the lower rubber cylinder 9, and then are transmitted to the radial direction through the incompressible fluid (silicon oil) 7 to act on the middle rubber cylinder 6, so that the diameter of the middle rubber cylinder 6 is enlarged to be attached to the wall of the casing, and meanwhile, the upper rubber cylinder 3 and the lower rubber cylinder 9 can also generate radial deformation under the action of the axial force and are attached to the wall of the casing, so that only fixed axial loads need to be applied, the sealing device can generate larger radial expansion under the double actions of the axial force and the radial force, reduce the shoulder load of the rubber cylinder, improve the pressure resistance, and further realize the advantages of long sealing time, large working pressure bearing difference, large sealing pressure and the like.
Claims (3)
- The double-acting ultrahigh-pressure clamping and sealing rubber cylinder is characterized in that an inner arc surface of the upper rubber cylinder (3) is attached to an outer arc surface of the upper portion of the middle rubber cylinder (6), an outer arc surface of the lower portion of the middle rubber cylinder (6) is attached to an inner arc surface of the lower rubber cylinder (9), the upper rubber cylinder (3), the middle rubber cylinder (6) and the lower rubber cylinder (9) jointly form a sealing mechanism, the sealing mechanism comprises the rubber inner cylinder (5), incompressible fluid (silicone oil) (7) and the oil injection nozzle (4), the force transmission mechanism is located in a sealed inner cavity formed by the sealing mechanism and the central tube (8), the incompressible fluid (silicone oil) (7) is filled in an inner space of the rubber inner cylinder (5), the inner bulge prevention mechanism comprises the upper bulge prevention ring (2) and the lower bulge prevention ring (2), the upper bulge prevention ring (1) and the lower bulge prevention ring (2) are sleeved on the upper end face of the upper support ring (1), the lower support ring (2) is in contact with the upper end face of the upper support ring (2), the upper support ring (10) and the lower end face of the upper support ring (2), and the lower support ring (2), and the upper end face of the upper support ring (10) and the lower support ring (8) are sleeved on the upper end face of the upper support ring (2).
- 2. A double-acting ultrahigh-pressure clamping and sealing rubber sleeve as claimed in claim 1, wherein holes are drilled in the top of the outer side of the rubber liner (5), the oil filling nozzle (4) is inserted into the holes, the circular rubber pad on the top of the oil filling nozzle (4) is adhered to the surface of the rubber liner (5), and then the rubber liner (5) is inflated and vulcanized for shaping.
- 3. A double-acting ultrahigh-pressure clamping and sealing rubber sleeve according to claim 1, wherein the oil injection nozzle (4) is provided with a vertical oil injection seam from top to bottom, the center of the top is provided with a semicircular groove, and the periphery of the top is provided with a circular rubber pad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911089227.7A CN110735612A (en) | 2019-11-08 | 2019-11-08 | double-acting ultrahigh-pressure clamping and sealing rubber cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911089227.7A CN110735612A (en) | 2019-11-08 | 2019-11-08 | double-acting ultrahigh-pressure clamping and sealing rubber cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110735612A true CN110735612A (en) | 2020-01-31 |
Family
ID=69272455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911089227.7A Pending CN110735612A (en) | 2019-11-08 | 2019-11-08 | double-acting ultrahigh-pressure clamping and sealing rubber cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110735612A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050199401A1 (en) * | 2004-03-12 | 2005-09-15 | Schlumberger Technology Corporation | System and Method to Seal Using a Swellable Material |
| US20100051259A1 (en) * | 2008-09-03 | 2010-03-04 | Jean-Louis Pessin | Expandable Packer Construction |
| CN202176305U (en) * | 2011-04-29 | 2012-03-28 | 中国石油化工股份有限公司 | Self-expandable packer with protrusion-resisting protective device |
| CN105114027A (en) * | 2015-08-06 | 2015-12-02 | 东北石油大学 | Flexible self-sealed anti-humeral-protrusion compression packer |
| CN106639964A (en) * | 2017-03-10 | 2017-05-10 | 西南石油大学 | High leakproofness shoulder-protrusion resistant compression type packer |
-
2019
- 2019-11-08 CN CN201911089227.7A patent/CN110735612A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050199401A1 (en) * | 2004-03-12 | 2005-09-15 | Schlumberger Technology Corporation | System and Method to Seal Using a Swellable Material |
| US20100051259A1 (en) * | 2008-09-03 | 2010-03-04 | Jean-Louis Pessin | Expandable Packer Construction |
| CN202176305U (en) * | 2011-04-29 | 2012-03-28 | 中国石油化工股份有限公司 | Self-expandable packer with protrusion-resisting protective device |
| CN105114027A (en) * | 2015-08-06 | 2015-12-02 | 东北石油大学 | Flexible self-sealed anti-humeral-protrusion compression packer |
| CN106639964A (en) * | 2017-03-10 | 2017-05-10 | 西南石油大学 | High leakproofness shoulder-protrusion resistant compression type packer |
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Application publication date: 20200131 |