CN203321422U - Floatable packer rubber cylinder seat sealing device - Google Patents
Floatable packer rubber cylinder seat sealing device Download PDFInfo
- Publication number
- CN203321422U CN203321422U CN2013203205201U CN201320320520U CN203321422U CN 203321422 U CN203321422 U CN 203321422U CN 2013203205201 U CN2013203205201 U CN 2013203205201U CN 201320320520 U CN201320320520 U CN 201320320520U CN 203321422 U CN203321422 U CN 203321422U
- Authority
- CN
- China
- Prior art keywords
- packing element
- rubber cylinder
- seat
- central tube
- packer
- 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.)
- Expired - Fee Related
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 19
- 238000007667 floating Methods 0.000 claims abstract description 6
- 238000012856 packing Methods 0.000 claims description 65
- 230000000903 blocking effect Effects 0.000 claims description 3
- 238000002347 injection Methods 0.000 abstract description 3
- 239000007924 injection Substances 0.000 abstract description 3
- 239000002332 oil field water Substances 0.000 abstract 1
- 239000003292 glue Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000010276 construction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 206010024453 Ligament sprain Diseases 0.000 description 1
- 208000010040 Sprains and Strains Diseases 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
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- Gasket Seals (AREA)
Abstract
A packer rubber cylinder seat sealing device capable of floating belongs to the technical field of oilfield water injection well operation. The pressing cap is connected with the outer circle of the upper rubber cylinder seat, the upper joint is connected with the inner circle of the upper rubber cylinder seat, the upper joint is connected with the upper rubber cylinder seat through a first O-shaped ring, the central pipe is provided with filter screen holes, the filter screen cover is installed between the central pipe and the rubber cylinder assembly after covering the filter screen holes, and the lower joint is connected with one end of the central pipe; one end of the rubber cylinder lower seat and the central tube form a floatable sealing structure, the other end of the rubber cylinder assembly is bonded with the rubber cylinder lower seat, and a closed annular space is formed between the central tube and the rubber cylinder assembly; the front end of the lower rubber cylinder seat is provided with 2 grooves, and 2 second O-shaped sealing rings are embedded in the grooves. The past fixed sealing structure is changed, and the setting and the unsetting of the long rubber sleeve packer are realized through the floating rubber sleeve seat.
Description
Technical field
The utility model relates to a kind of packing element seat sealing device that floats, and belongs to water injection well in oil fields operation technique field.
Background technology
In the past, generally adopting expanding long packing element packer glue tube base is fixed structure, between glue tube base and packer central tube, is a kind of fixed hermetically-sealed construction, and the packing element radial dilatation brings vertical reduction can only lean on packing element compensation itself.The drawback of this mode is very high to the performance requirement of packing element itself, and packer is in the situation that down-hole prolonged and repeatedly sets, deblocking, and the packing element end is frequent to stretch stressed excessively, easily is torn, and sealing effectiveness can be affected, and packer easily lost efficacy.Water injection well is tested the envelope operation and is often found the packing less phenomenon of packer, through investigating majority, by the packing element end, damages poorly sealed causing.
Summary of the invention
In order to overcome the deficiencies in the prior art, the utility model provides a kind of packing element seat sealing device that floats, and improves long packing element type end force-bearing situation, improves the packing element working life.
A kind of packing element seat sealing device that floats, pressure cap is connected with the cylindrical at the packing element seat of honour, top connection is connected with the inner circle at the packing element seat of honour, between top connection and the packing element seat of honour, there is an O shape circle to be connected, central tube has opening of sieve, screen cover is arranged between central tube and packing element assembly after blocking opening of sieve, and lower contact is connected with an end of central tube; But the end that packing element is lower and central tube form floating sealing structure, and lower of the other end of packing element assembly and packing element are bonded together, at central tube and packing element, always be shaped as an airtight annular space; The front end that packing element is lower has 2 road groove structures, embedded 2 road the second O-ring seals.
The utility model has the advantages that 1. realize the remodeling of glue tube base; Change fixed hermetically-sealed construction in the past, by the glue tube base that floats, realized the setting of long packing element packer, deblocking.2. effectively overcome the flimsy weakness in long packing element type end; Realized the small unsteady characteristics in long packing element type end by the glue tube base hermetically-sealed construction that can float, auto-compensation has been realized in the packing element end, effectively improved the packing element end and be subject to the excessive drawback of axial force, packing element has been played to protective effect.3. lift-off seal performance.The glue tube base end adopts the groove design structure, and embedded 2 road O shape circles have been realized double seal with central tube, and sealing performance is protected, packing element radial dilatation during packer setting, the glue tube base axially-movable, O shape circle is by further crush seal better effects if, and sealing performance is secure.
The accompanying drawing explanation
When considered in conjunction with the accompanying drawings, by the detailed description with reference to following, can more completely understand better the utility model and easily learn wherein many advantages of following, but accompanying drawing described herein is used to provide further understanding of the present utility model, form a part of the present utility model, schematic description and description of the present utility model, for explaining the utility model, does not form improper restriction of the present utility model, as schemed wherein:
Fig. 1 is one of structural behavior of the present utility model schematic diagram.
Two schematic diagrames that Fig. 2 is structural behavior of the present utility model.
Below in conjunction with drawings and Examples, the utility model is further illustrated.
The specific embodiment
Obviously, the many modifications and variations that those skilled in the art do based on aim of the present utility model belong to protection domain of the present utility model.
Embodiment 1: as shown in Figure 1 and Figure 2,
A kind of packing element seat sealing device that floats, pressure cap 2 is connected with the cylindrical at the packing element seat of honour 6, top connection 1 is connected with the inner circle at the packing element seat of honour 6, between top connection 1 and the packing element seat of honour 6, there is an O shape circle 3 to be connected, central tube 7 has opening of sieve 4, screen cover 5 is arranged between central tube 7 and packing element assembly 8 after blocking opening of sieve 4, and lower contact 11 is connected with an end of central tube 7;
Lower 9 of packing element be with O-ring seals, but an end and the central tube 7 of lower 9 of packing element form floating sealing structures, and lower 9 of the other end of packing element assembly 8 and packing element are bonded together, at airtight annular space of central tube 7 and 8 formation of packing element assembly; The front end that packing element is lower 9 has 2 road groove structures, and embedded 2 road the second O-ring seals 10, for the sealing of lower 9 of packing element and central tube 7.
When packer setting, deblocking, long packing element type is expanded thereupon, is shunk, and lower rubber cylinder seat 9 compensates packing element assembly 8 by floating sealing structure, does not affect the setting of packer, deblocking effect.
The packer setting process: the expanding long packing element packer be by the oil pipe inside and outside differential pressure complete set, the deblocking process.During packer setting, oil pipe inner high voltage liquid enters packing element assembly 8 inside by the opening of sieve 4 of central tube 7 reserved feed liquors, along with continuing in oil pipe to sprain, press and the outside pressure reduction that forms of packing element, make packing element assembly 8 radial dilatation Seal Oil cover annular spaces, lower 9 of the packing element that can float when packing element assembly 8 radial dilatation cause axial reduction carries out nose balance until set (Fig. 1).
The removing seal for packer process: the removing seal for packer process is with to set process contrary, the slow pressure release of oil pipe, between packing element assembly 8 and central tube 7, the highly pressurised liquid in cavity flows backwards from central tube opening of sieve 4 before, along with continuing pressure release in oil pipe, the packing element inside and outside differential pressure further reduces, packing element assembly 8 radially undergauge restores to the original state, and packing element assembly 8 radially reduces and causes that axial expansion moves axially packing element is restored to the original state fully by lower 9 of the packing element that can float, and removing seal for packer completes (Fig. 2).
As mentioned above, embodiment of the present utility model is explained, but, as long as not breaking away from fact inventive point of the present utility model and effect can have a lot of distortion, this will be readily apparent to persons skilled in the art.Therefore, within such variation also all is included in protection domain of the present utility model.
Claims (1)
1. the packing element seat sealing device that can float, it is characterized in that pressure cap is connected with the cylindrical at the packing element seat of honour, top connection is connected with the inner circle at the packing element seat of honour, between top connection and the packing element seat of honour, there is an O shape circle to be connected, central tube has opening of sieve, screen cover is arranged between central tube and packing element assembly after blocking opening of sieve, and lower contact is connected with an end of central tube; But the end that packing element is lower and central tube form floating sealing structure, and lower of the other end of packing element assembly and packing element are bonded together, at central tube and packing element, always be shaped as an airtight annular space; The front end that packing element is lower has 2 road groove structures, embedded 2 road the second O-ring seals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203205201U CN203321422U (en) | 2013-06-05 | 2013-06-05 | Floatable packer rubber cylinder seat sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203205201U CN203321422U (en) | 2013-06-05 | 2013-06-05 | Floatable packer rubber cylinder seat sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203321422U true CN203321422U (en) | 2013-12-04 |
Family
ID=49660785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203205201U Expired - Fee Related CN203321422U (en) | 2013-06-05 | 2013-06-05 | Floatable packer rubber cylinder seat sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203321422U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111520112A (en) * | 2020-05-27 | 2020-08-11 | 中国石油天然气集团有限公司 | Step-by-step directional hydraulic jet separate layer fracturing string |
| CN112012703A (en) * | 2019-05-29 | 2020-12-01 | 中国海洋石油集团有限公司 | Layer-by-layer fixed-point fluid injection device and injection method |
-
2013
- 2013-06-05 CN CN2013203205201U patent/CN203321422U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112012703A (en) * | 2019-05-29 | 2020-12-01 | 中国海洋石油集团有限公司 | Layer-by-layer fixed-point fluid injection device and injection method |
| CN111520112A (en) * | 2020-05-27 | 2020-08-11 | 中国石油天然气集团有限公司 | Step-by-step directional hydraulic jet separate layer fracturing string |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131204 Termination date: 20210605 |