CN205532461U - Spiral packer packing element of belted steel skeleton - Google Patents
Spiral packer packing element of belted steel skeleton Download PDFInfo
- Publication number
- CN205532461U CN205532461U CN201620392122.4U CN201620392122U CN205532461U CN 205532461 U CN205532461 U CN 205532461U CN 201620392122 U CN201620392122 U CN 201620392122U CN 205532461 U CN205532461 U CN 205532461U
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- CN
- China
- Prior art keywords
- packing element
- element body
- spiral
- coil spring
- steel skeleton
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Abstract
The utility model relates to a packer packing element, concretely relates to spiral packer packing element of belted steel skeleton. This packing element includes the packing element body, the packing element body be the tube -shape, be provided with the spiral line on the packing element body, the parcel has coil spring in the spiral line of packing element body. This packing element simple structure, the practicality is good, and the coil spring through parcel in the packing element body can evenly transmit axial pressure on the packing element body under pressure effect to coil spring's axial deformation volume is unanimous with the packing element body, makes packing element body atress even, avoids the middle part of packing element body to take place the bending deformation, thereby has increased the contact length of packing element body with the wall of a well, has increased sealing area and stability, reduce " the shoulder suddenly " phenomenon. Coil spring energy storage when the compression simultaneously, during the packing element deblocking, coil spring release of energy enables the quick reconversion of packing element.
Description
Technical field
This utility model relates to a kind of packing element, is specifically related to the spiral packing element of a kind of band steel skeleton.
Background technology
Packer is the requisite instrument of one of down-hole oil production technique, has been widely used in operations such as completion, water filling, pressure break, acidifyings.Packer, by the annular space between elastic sealing elements packing tubing string and the borehole wall and between tubing string and tubing string, plays isolation well liquid and pressure, thus controls product fluid or inject liquid and protection sleeve pipe.Its key components are to have the elastic packing element of sealing property, and the sealing property of packing element directly influences the sealing effectiveness of packer.
Common packing element has single packing element or the many packing elements by the combination of multiple single packing elements.When using single packing element, need to increase packing element length for obtaining required sealing area, but the packing element after lengthening easily produces the contact stress between gauffer, packing element and the borehole wall or sleeve pipe and can reduce, and causes seal failure.And along with the change of packing element height, the shearing force on the borehole wall changes the most therewith, when height increases, shearing force reduces therewith.Shearing force on the borehole wall acts directly on packing element outer wall, it will makes packing element produce shoulder and highlights.
When using many packing elements, during packer down-hole sets, effective sealing area of packing element can improve, but owing to transmitting axial compressive force by spacer ring, thus axial compressive force reduces, and produces different contact stress, cause lower rubber cylinder discontinuity and there is sudden change between all packing elements from the borehole wall or sleeve pipe, make packing element can not be fully contacted with the borehole wall, thus have impact on sealing property.If increasing the seating sealing load to packing element, packing element and the contact stress of lower rubber cylinder and contact length in can increasing, but upper packing element can produce the biggest shoulder under the effect of frictional force and highlight, and excessive frictional force can make packing element be torn by the borehole wall, so that packing element loses the performance of sealing.Packing element by maximum contact pressure, it may appear that " shoulder " phenomenon, causes bigger stress to concentrate, after stress reaches packing element limit of rupture stress, packing element arises that crackle, and under external pressure effect, crackle continues extension, finally tear packing element, cause packing element to lose efficacy.All there is various deficiency in existing conventional packing element, it is impossible to realizes the most effectively sealing.
Accordingly, it would be desirable to design a kind of Novel packer packing element thus optimize packer setting quality, improve packing element structure and mechanical property, the stress reducing packing element shoulder is concentrated, increase seating sealing load and can effectively increase the contact stress of packing element, it is to avoid packing element lost efficacy, increase sealing area.
Summary of the invention
The purpose of this utility model is: provides one can effectively reduce existing packing element shoulder stress and concentrates, reduces the stress suffered by packing element, increase the spiral packing element of the band steel skeleton of packing element sealing area.
The technical solution of the utility model is:
The spiral packing element of a kind of band steel skeleton, including packing element body, it is characterised in that: described packing element body is tubular, packing element body is provided with spiral lamination, is enclosed with helical spring in the spiral lamination of packing element body.
Described helical spring is steel helical spring.
Described helical spring is single line spring or two wire spring or multi-thread ring spring.
The rigidity of described helical spring is more than the rigidity of packing element body.
The beneficial effects of the utility model are:
The spiral packing element simple in construction of this band steel skeleton, practicality is good, axial compressive force can be uniformly transferred on packing element body under pressure by the helical spring of this internal parcel of packing element, and the axial deflection of helical spring is consistent with packing element body, make packing element body uniform force, the middle part avoiding packing element body occurs bending and deformation, thus adds the contact length of packing element body and the borehole wall, adds sealing area and stability；Reduce " shoulder " phenomenon.Helical spring accumulation of energy when compression simultaneously, during packing element deblocking, helical spring releases energy and packing element can be made quickly to restore to the original state.
Accompanying drawing explanation
Fig. 1 is cross section structure schematic diagram of the present utility model.
In figure: 1, packing element body, 2, helical spring, 3, spiral lamination.
Detailed description of the invention
The spiral packing element of this band steel skeleton includes packing element body 1；Packing element body 1 is tubular, and packing element body 1 is provided with spiral lamination 3, is enclosed with helical spring 2 in the spiral lamination 3 of packing element body 1.Helical spring 2 is steel helical spring.Helical spring 2 is single line spring or two wire spring or multi-thread ring spring.
The rigidity of the helical spring 2 of this spiral packing element is more than the rigidity of packing element body 1.
This spiral packing element is when installing and using, and packing element body 1 is wrapped on packer outer shaft, is lowered into appointment position with packer with sleeve pipe in work process.When setting, packer presses to the end of packing element body 1, and helical spring 2 is synchronize with packing element body 1 to be compressed, so that packing element body 1 is by compression-expansion, its outer wall fits tightly with the borehole wall, is achieved in setting.
Packing element body 1 is during by compression, effect due to helical spring 2, the axial deflection of helical spring 2 is consistent with packing element body 1, make packing element body 1 uniform force, the middle part avoiding packing element body 1 occurs bending and deformation, thus add the contact length of packing element body 1 and the borehole wall, add sealing area and stability；Decrease " shoulder " phenomenon.Helical spring 2 accumulation of energy when compression simultaneously, during packing element deblocking, helical spring 2 releases energy and packing element can be made quickly to restore to the original state.
This spiral packing element has higher pressure-bearing and non-deformability.It is applicable to oil gas field industry completion, water filling, pressure break, acidifying etc..Can be effectively improved instrument enters well safety and sealing reliability.
Claims (4)
1. a spiral packing element for band steel skeleton, including packing element body (1), it is characterised in that: described packing element body (1) is tubular, packing element body (1) is provided with spiral lamination (3), is enclosed with helical spring (2) in spiral lamination (3).
The spiral packing element of a kind of band steel skeleton the most according to claim 1, it is characterised in that: described helical spring (2) is steel helical spring.
The spiral packing element of a kind of band steel skeleton the most according to claim 1, it is characterised in that: described helical spring (2) is single line spring or two wire spring or multi-thread ring spring.
The spiral packing element of a kind of band steel skeleton the most according to claim 1, it is characterised in that: the rigidity of described helical spring (2) is more than the rigidity of packing element body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620392122.4U CN205532461U (en) | 2016-05-04 | 2016-05-04 | Spiral packer packing element of belted steel skeleton |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620392122.4U CN205532461U (en) | 2016-05-04 | 2016-05-04 | Spiral packer packing element of belted steel skeleton |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205532461U true CN205532461U (en) | 2016-08-31 |
Family
ID=56795726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620392122.4U Expired - Fee Related CN205532461U (en) | 2016-05-04 | 2016-05-04 | Spiral packer packing element of belted steel skeleton |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205532461U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105781481A (en) * | 2016-05-04 | 2016-07-20 | 长江大学 | Spiral packer rubber barrel with steel skeleton |
| CN107420065A (en) * | 2017-05-08 | 2017-12-01 | 西安石油大学 | A kind of elastic packing element of intelligence and preparation method thereof |
-
2016
- 2016-05-04 CN CN201620392122.4U patent/CN205532461U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105781481A (en) * | 2016-05-04 | 2016-07-20 | 长江大学 | Spiral packer rubber barrel with steel skeleton |
| CN107420065A (en) * | 2017-05-08 | 2017-12-01 | 西安石油大学 | A kind of elastic packing element of intelligence and preparation method thereof |
| CN107420065B (en) * | 2017-05-08 | 2023-08-11 | 西安石油大学 | Intelligent elastic rubber cylinder and preparation method thereof |
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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: 20160831 Termination date: 20170504 |