CN212249947U - Sealing structure of downhole packer - Google Patents
Sealing structure of downhole packer Download PDFInfo
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- CN212249947U CN212249947U CN202020844967.9U CN202020844967U CN212249947U CN 212249947 U CN212249947 U CN 212249947U CN 202020844967 U CN202020844967 U CN 202020844967U CN 212249947 U CN212249947 U CN 212249947U
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- packing element
- body circle
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- sleeve pipe
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Abstract
The utility model discloses a packer seal structure in pit, the installation structure comprises a sleeve, sleeve pipe upper end central point puts the outside activity and cup joints and is provided with middle packing element, middle packing element both sides are cup jointed in the activity of the sleeve pipe outside and are provided with the limit packing element, the limit packing element is kept away from middle packing element one side and is cup jointed in the activity of sleeve pipe outside end position and be provided with first back of the body circle. The utility model discloses install group's protection back of the body circle on the limit packing element on both sides, be first back of the body circle pyrocondensation material back of the body circle respectively, second back of the body circle steel wire back of the body circle, third back of the body circle brass back of the body circle and fourth back of the body circle low carbon steel back of the body circle, back of the body circle can warp after the compression, and hug closely with the intraductal wall of sleeve, form a bowl shape protection form, make at high temperature, under the high pressure difference environment, middle packing element can not follow the gap with the limit packing element and flow out and lead to sealed inefficacy, whole device bears high temperature, high pressure, it is most critical to prevent middle packing element and limit packing element from losing under high temperature, another is just to keep middle packing element and limit packing element to.
Description
Technical Field
The utility model relates to a packer equipment field specifically is a packer seal structure in pit.
Background
The packer is mainly used for packing the annular space of the casing pipe, and key parts in the packer are rubber cylinders and belong to sealing parts in the packer; the sealing performance of the rubber sleeve of the packer directly influences the performance of the packer.
Due to the development of the petroleum industry at present, shallow wells, low-temperature wells and low-pressure wells are developed on a large scale at present, and when oil and gas reservoirs such as ultra-deep wells and heavy oil wells are developed, high-temperature and high-pressure well conditions can be met, so that higher requirements are provided for the sealing performance of the packer, and the conventional packer cannot meet the field application requirements of 316 ℃ and 140MPa at present, so that a device is urgently needed for solving the problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a packer seal structure in pit to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a packer seal structure in pit, includes the sleeve pipe, sleeve pipe upper end central point puts the activity in the outside and cup joints and is provided with middle packing element, middle packing element both sides are cup jointed in the activity of the sleeve pipe outside and are provided with the limit packing element, the limit packing element is kept away from middle packing element one side and is cup jointed in the activity of sleeve pipe outside end position and be provided with first back of the body circle, first back of the body circle is kept away from middle packing element one side and is provided with second back of the body circle in the activity of sleeve pipe outside end cup joint, the second back of the body circle is the steel wire material, second back of the body circle is kept away from middle packing element one side and is cup jointed in the activity of sleeve pipe outside end and be provided with the third back of the body circle.
Preferably, the middle rubber cylinder is made of soft rubber.
Preferably, the side rubber tube is made of hard rubber.
Preferably, the first back ring is made of thermoplastic materials.
Preferably, the third back ring is made of brass.
Preferably, the fourth back ring is made of low-carbon steel.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses install group's protection back of the body circle on the limit packing element on both sides, be first back of the body circle pyrocondensation material back of the body circle respectively, second back of the body circle steel wire back of the body circle, third back of the body circle brass back of the body circle and fourth back of the body circle low carbon steel back of the body circle, back of the body circle can warp after the compression, and hug closely with the intraductal wall of sleeve, form a bowl shape protection form, make at high temperature, under the high pressure difference environment, middle packing element can not follow the gap with the limit packing element and flow out and lead to sealed inefficacy, whole device bears high temperature, high pressure, it is most critical to prevent middle packing element and limit packing element from losing under high temperature, another is just to keep middle packing element and limit packing element to.
Drawings
FIG. 1 is a schematic view of the overall structure of a sealing structure of a downhole packer of the present invention;
figure 2 is the utility model discloses a vertical section of packer seal structure in pit.
In the figure: 1. a middle rubber cylinder; 2. an edge rubber cylinder; 3. a first back loop; 4. a second back loop; 5. a third back ring; 6. a fourth back loop; 7. a sleeve.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a technical solution: the utility model provides a packer seal structure in pit, including sleeve pipe 7, sleeve pipe 7 upper end central point puts the activity in the outside and has cup jointed middle packing element 1, middle packing element 1 is soft rubber material, middle packing element 1 both sides are cup jointed limit packing element 2 in the activity of the sleeve pipe 7 outside, limit packing element 2 is hard rubber material, limit packing element 2 keeps away from middle packing element 1 one side and has cup jointed first back of the body circle 3 in the activity of sleeve pipe 7 outside end position, first back of the body circle 3 is thermoplastic material, first back of the body circle 3 keeps away from middle packing element 1 one side and has cup jointed second back of the body circle 4 in the activity of sleeve pipe 7 outside end, second back of the body circle 4 is steel wire material, second back of the body circle 4 keeps away from middle packing element 1 one side and has cup jointed third back of the body circle 5 in the activity of sleeve pipe 7 outside end, third back of the body circle 5 is brass material, third back of the body circle 5 keeps away from middle packing element 1 one side and has cup jointed fourth back of the body circle 6 in the activity.
The working principle is as follows: the utility model discloses an install 4 protection back of the body circles of group on the limit packing element 2 on both sides, be the 3 pyrocondensation material back of the body circles of first back of the body circle respectively, 4 steel wire back of the body circles of second back of the body circle, 5 brass back of the body circles of third back of the body circle and the 6 low carbon steel back of the body circles of fourth back of the body circle, back of the body circle can warp after the compression, and hug closely with 7 inner walls of sleeve pipe, form a bowl shape protection form, make at high temperature, under the high pressure difference environment, middle packing element 1 can not flow from the gap with limit packing element 2 and lead to sealed the inefficacy, whole device bears high temperature, high pressure, most crucial is preventing that middle packing element 1 from losing under high temperature with limit packing element 2, another is exactly that it has sufficient normal pressure to keep middle packing element 1 with limit packing element 2, effective sealing is kept, and.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A downhole packer sealing structure, comprising a casing (7), characterized in that: sleeve pipe (7) upper end central point puts the activity of the outside and cup joints and is provided with middle packing element (1), middle packing element (1) both sides are cup jointed in the activity of sleeve pipe (7) outside and are provided with limit packing element (2), limit packing element (2) are kept away from middle packing element (1) one side and are cup jointed in the activity of sleeve pipe (7) outside position and be provided with first back of the body circle (3), first back of the body circle (3) are kept away from middle packing element (1) one side and are cup jointed in the activity of sleeve pipe (7) outside end and be provided with second back of the body circle (4), second back of the body circle (4) are kept away from middle packing element (1) one side and are cup jointed in the activity of sleeve pipe (7) outside end and are provided with third back of the body circle (5), third back of the body circle (5) are kept away from middle packing element (1) one side and are cup jointed in the activity of sleeve pipe (7.
2. A downhole packer sealing structure according to claim 1, wherein: the middle rubber cylinder (1) is made of soft rubber.
3. A downhole packer sealing structure according to claim 1, wherein: the side rubber cylinder (2) is made of hard rubber.
4. A downhole packer sealing structure according to claim 1, wherein: the first back ring (3) is made of thermoplastic materials.
5. A downhole packer sealing structure according to claim 1, wherein: the third back ring (5) is made of brass.
6. A downhole packer sealing structure according to claim 1, wherein: the fourth back ring (6) is made of low-carbon steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020844967.9U CN212249947U (en) | 2020-05-20 | 2020-05-20 | Sealing structure of downhole packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020844967.9U CN212249947U (en) | 2020-05-20 | 2020-05-20 | Sealing structure of downhole packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212249947U true CN212249947U (en) | 2020-12-29 |
Family
ID=73999768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020844967.9U Active CN212249947U (en) | 2020-05-20 | 2020-05-20 | Sealing structure of downhole packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212249947U (en) |
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2020
- 2020-05-20 CN CN202020844967.9U patent/CN212249947U/en active Active
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