CN201273168Y - High pressure-resistant sealing mechanism of packer - Google Patents
High pressure-resistant sealing mechanism of packer Download PDFInfo
- Publication number
- CN201273168Y CN201273168Y CNU2008201717755U CN200820171775U CN201273168Y CN 201273168 Y CN201273168 Y CN 201273168Y CN U2008201717755 U CNU2008201717755 U CN U2008201717755U CN 200820171775 U CN200820171775 U CN 200820171775U CN 201273168 Y CN201273168 Y CN 201273168Y
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- Prior art keywords
- packer
- cone
- pressure resistant
- sealing mechanism
- resistant sealing
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- Expired - Fee Related
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Abstract
The utility model discloses a packer high-pressure resistant sealing mechanism in petroleum industry, which is used on a packer of a well needing the zonal tests and exploration. The packer high-pressure resistant sealing mechanism comprises a protruding prevention sleeve and a cone, wherein the upper portion of the protruding prevention sleeve is connected with an upper joint of the packer, and the cone is installed on the lower portion of the protruding prevention sleeve, and the mechanism is installed above a sealing rubber cylinder of the packer. The cone in the mechanism can push the protruding prevention sleeve to expand outwards for attaching to the inner wall of a casing, thereby realizing the metal-closure and oil jacket annulus, making the sealing rubber cylinder lose the ring-shaped flowing space thereof, increasing the sealing effect of the packer, and solving the problems of the gap existence in the ring-shaped space after setting an existing packer and the shoulder protrusion fault of the sealing rubber cylinder. The packer high-pressure resistant sealing mechanism is suitable for various packers.
Description
Technical field
The utility model belongs to downhole oil, gas, the water layer interlayer packing instrument of petroleum industry, and the high pressure resistant sealing mechanism of particularly a kind of packer is used between the high pressure zone of wells such as needing formation testing by layer, exploitation on the packer.
Background technology
In oil exploration and development process, need to carry out packing at different times to the different layers position, need different types of packer to isolate Different Strata, prevent that fluid from scurrying logical.In a single day packer packing occurs and lost efficacy, and can't realize estimating the purpose of stratum, reasonable development.Therefore, one of most important technical indicator of packer is exactly to seal withstand voltage properties.During packer work, gapped between steel body and internal surface of sleeve pipe, existing " packing " function by the cartridge stress deformation after external diameter enlarge and internal surface of sleeve pipe is fitted and realized, under High Pressure Difference, as the cartridge of the flexible body effect that can occur " takeing on protruding ", cause packing to lose efficacy along gap between steel body and internal surface of sleeve pipe.At present, for the method that prevents the withstand voltage difference of " takeing on protruding " inefficacy raising packer mainly contains two kinds: the one, improve anti-" takeing on protruding " performance by improving cartridge hardness; The 2nd, install anti-" takeing on protruding " copper bowl additional in the cartridge end, utilize copper bowl distortion and sleeve pipe to fit to prevent cartridge from " takeing on protruding ".Though these two kinds of methods have certain effect, when pressure reduction is enough big, still can't guarantee the sealing performance of instrument.Along with oil, gas exploration to the development of deep-well, ultradeep well, gas well aspect, construction pressure reduction is more and more higher, the packer sealing performance is more important, adopts traditional approach can not satisfy production requirement, and it is significant to solving production contradiction to develop the new construction that satisfies the high-voltage construction needs.
Summary of the invention
The purpose of this utility model is to make the high pressure resistant sealing mechanism of a kind of packer, is used on the packer, makes packer can tolerate high pressure, overcomes defective of the prior art, improves the withstand voltage poor ability of packer, satisfies the high-voltage construction needs.
Use the present technique solution can reach above-mentioned purpose: the high pressure resistant sealing mechanism of a kind of packer comprises anti-protruding cover and cone, and anti-protruding cover top is connected with the top connection of packer, and cone is installed in its below, this mechanism is installed in the cartridge top of packer.
The utility model compared with prior art has following significant effect: the anti-protruding cover top of this mechanism connects with the top connection of packer with screw thread, its underpart axially has a plurality of vertical slots, easily deformable under responsive to axial force, inner surface is processed with bellmouth and cooperates with the cone of below, and the cone end thrust that forms that moves upward plays a part to strut anti-protruding cover.Bowl-shape neonychium also is equipped with in the cone lower end, and this neonychium is thin and material is soft, easily deformable.The utility model can be used in various packers, and it is installed on packer sealing packing element top.During packer work, last thrust is at first pushed neonychium open the distortion back and is shut annular space with the internal surface of sleeve pipe applying.Then fitting with sleeve pipe and again neonychium played a supporting role in anti-protruding cover distortion back, makes the cartridge of this mechanism below lose the annularly flow space, thereby improved the withstand voltage properties of packer, improved the success rate of underground work.
Description of drawings
Accompanying drawing is the structural representation that the utility model uses on packer.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is done further detailed description: referring to accompanying drawing, the high pressure resistant sealing mechanism of a kind of packer comprises anti-protruding cover 2 and cone 3, and anti-protruding cover 2 tops are connected with the top connection 1 of packer, and cone 3 is installed in its below.At least have 3 axial pass troughs on the lower case of anti-protruding cover 2, its bottom is provided with cone-shaped inner hole, and this cone-shaped inner hole cooperates with cone 3.Cone-shaped inner hole top, anti-protruding cover 2 lower end is provided with and helps bloated inner chamber, and this chamber internal diameter helps the housing distending, annular seal space greater than other internal diameter of anti-protruding cover 2.Neonychium 4 also is equipped with in the below of cone 3, and neonychium 4 is bowl-shape pads, and is thin and material is soft, and the sealing oil sets annular space is played booster action.This mechanism is installed between the top connection 1 and cartridge 5 of packer, top connection 1 cylindrical is connected with anti-protruding cover 2, and circle is connected with central tube 7 in it.Spacer ring 6 is housed between cartridge 5, and the below of cartridge 5 is sealing expanding mechanisms of packer.The sealing expanding mechanism comprises pressure ring 8, shear pin 9 and guide sub 10 down, and following pressure ring 8 connects by shear pin 9 with guide sub 10, is installed in the lower contact 11, and lower contact 11 is connected by the cylindrical of screw thread with following pressure ring 8.The supporting supporting tool in packer bottom is supported on internal surface of sleeve pipe earlier during work.Transfer tubing string, shear pin 9 is cut off under responsive to axial force.Cartridge 5 is compressed distortion under the promotion of following pressure ring 8, external diameter enlarges the back and fits with internal surface of sleeve pipe; Simultaneously, neonychium 4 opens under cartridge 5 deformation force effects with internal surface of sleeve pipe fits, and realizes that annular space is by metallic seal.Under the effect of cone 3, the same distortion of anti-protruding cover 2 that has many axial pass troughs is fitted with internal surface of sleeve pipe, for neonychium 4 plays the rigid support effect, prevents that High Pressure Difference lower seal packing element 5 from " take on " inefficacy protruding, realizes high pressure resistant poor work.
Put on joint 1 on during deblocking, the axial pass trough on joining with it anti-protruding cover 2 housings is returned to original diameter under the elastic force effect, can trip out the packer that has used this instrument smoothly.
Claims (4)
1, the high pressure resistant sealing mechanism of a kind of packer is characterized in that this mechanism comprises anti-protruding cover (2) and cone (3), and anti-protruding cover (2) top is connected with the top connection (1) of packer, and cone (3) is installed in its below.
2, the high pressure resistant sealing mechanism of a kind of packer according to claim 1 is characterized in that having 3 axial pass troughs at least on the lower case of anti-protruding cover (2), and its bottom is provided with cone-shaped inner hole, and this cone-shaped inner hole cooperates with cone (3).
3, the high pressure resistant sealing mechanism of a kind of packer according to claim 2 is characterized in that cone-shaped inner hole top, anti-protruding cover (2) lower end is provided with to help bloated inner chamber.
4, the high pressure resistant sealing mechanism of a kind of packer according to claim 1 is characterized in that neonychium (4) also is equipped with in the below of cone (3), and neonychium (4) is bowl-shape pad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201717755U CN201273168Y (en) | 2008-09-19 | 2008-09-19 | High pressure-resistant sealing mechanism of packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201717755U CN201273168Y (en) | 2008-09-19 | 2008-09-19 | High pressure-resistant sealing mechanism of packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201273168Y true CN201273168Y (en) | 2009-07-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201717755U Expired - Fee Related CN201273168Y (en) | 2008-09-19 | 2008-09-19 | High pressure-resistant sealing mechanism of packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201273168Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105178907A (en) * | 2015-09-01 | 2015-12-23 | 上海大学 | Compression packer sealing structure |
| CN105239956A (en) * | 2015-11-04 | 2016-01-13 | 天津市益彰石油科技发展有限公司 | Wedge type sealer |
-
2008
- 2008-09-19 CN CNU2008201717755U patent/CN201273168Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105178907A (en) * | 2015-09-01 | 2015-12-23 | 上海大学 | Compression packer sealing structure |
| CN105239956A (en) * | 2015-11-04 | 2016-01-13 | 天津市益彰石油科技发展有限公司 | Wedge type sealer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090715 Termination date: 20120919 |