CN207739983U - A kind of tail pipe brace type high temperature and pressure packer - Google Patents
A kind of tail pipe brace type high temperature and pressure packer Download PDFInfo
- Publication number
- CN207739983U CN207739983U CN201721874697.0U CN201721874697U CN207739983U CN 207739983 U CN207739983 U CN 207739983U CN 201721874697 U CN201721874697 U CN 201721874697U CN 207739983 U CN207739983 U CN 207739983U
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- CN
- China
- Prior art keywords
- packing element
- screwed connection
- high temperature
- shear pin
- central tube
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- Expired - Fee Related
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Abstract
The utility model is related to a kind of tail pipe brace type high temperature and pressure packers in oil and gas industry oil-gas Layer well cementing operation field.It solves the problems, such as that the sealing of hp-ht well tail pipe zonal isolation is difficult.Its technical solution is：Top connection upper end and top tubing string screwed connection, lower contact lower end and lower part tubing string screwed connection；Central tube upper end and the screwed connection of top connection lower end, central tube lower end cap off upper end screwed connection with anti-；Packing element upper end and upper isolating ring vulcanization are fixed, and packing element lower end and lower isolating ring vulcanization are fixed, and are set as stepped hole in the middle part of packing element endoporus, packing element is made of high temperature resistant vulcanized rubber；Shear pin is mounted in the middle part of support tube in shear pin hole, and shear pin one end is placed in the counterbore of central tube outer circle lower part；Support tube lower end and the screwed connection of lower contact upper end.The utility model can insulate underground layer of oil gas production under high temperature and high pressure environment, easy to operate, easy to control.
Description
Technical field
The utility model is related to a kind of tail pipe brace type high temperature in oil and gas industry oil-gas Layer well cementing operation field
Well cementation correlation field of operation under high-pressure packer more particularly to high temperature and pressure well environment.
Background technology
Currently, extension hanger type is various, the extension hanger of specific function is designed with for different well's conditions, than as usual
Advise extension hanger, rotary liner hanger and packing formula extension hanger etc..The extension hanger of oneself domestic production is most
Only there is hanging function, not the function of top packer for tail pipe.And the formula extension hanger of packing is the base in conventional hanger
Design top packer on plinth, packer and hanger are with the use of after may be implemented well cementing operation, packing casing and outstanding
The annular space of hanging device prevents from altering on the fluid on stratum, hinders subsequent construction operation.
With the continuous development of petroleum drilling technology, some Holes of Complicated Wells such as ultradeep well, horizontal well, extended reach well, high-pressure well
Etc. more and more, extension hanger and packer have played huge effect in terms of solving the problems, such as Holes of Complicated Wells drillng operation.It adopts
Underground high temperature, high pressure drilling hydraulics can be substantially improved with extension hanger, reduce drilling machine and drilling tool load.Since tail pipe seals
It is in underground tail pipe position every the setting position of device, local environment is severe, mostly 100 DEG C or more high temperature and 70MPa or more high pressures
Environment.And the sealing mechanism of existing tail pipe packer mostly uses and is compressed axially packing element deformation realization sealing, the sealing structure
Sealability is weaker, and packing pressure is low, and the subsurface environment of high temperature and pressure is difficult to meet the functional requirement of packing payzone.
Invention content
The purpose of this utility model is：To solve the problems, such as that the sealing of hp-ht well tail pipe zonal isolation is difficult, provide
A kind of tail pipe brace type high temperature and pressure packer.
In order to achieve the above object, the utility model uses following technical scheme：A kind of tail pipe brace type high temperature and pressure envelope
Every device, it is made of with lower contact top connection, central tube, upper isolating ring, packing element, lower isolating ring, shear pin, support tube, anti-cap off；It is tied
Structure is characterized in：Top connection upper end and top tubing string screwed connection, lower contact lower end and lower part tubing string screwed connection；Central tube upper end
With the screwed connection of top connection lower end, central tube lower end caps off upper end screwed connection with anti-；It is circumferential in the middle part of central tube outer circle uniformly to set
Four axial notches are set, a counterbore is arranged in central tube outer circle lower part；Packing element upper end and upper isolating ring vulcanization are fixed, and packing element lower end is under
Spacer ring vulcanization is fixed, and is set as stepped hole in the middle part of packing element endoporus, packing element is made of high temperature resistant vulcanized rubber；Support tube top week
To four runner through-holes are uniformly arranged, a shear pin hole is set, support tube inner chamber is set as stepped hole in the middle part of support tube；Shear pin is installed
In the middle part of the support tube in shear pin hole, shear pin one end is placed in the counterbore of central tube outer circle lower part；Support tube lower end and lower contact upper end
Screwed connection.
The utility model has the beneficial effects that：(1) the utility model can insulate underground oil gas production under high temperature and high pressure environment
Layer；(2) outside pressure balances in the packing element of the utility model, can increase autobalance sealed pressure with down-hole pressure, can be close
Seal 70MPa or more high pressures；(3) the utility model is easy to operate, easy to control；(4) the utility model is simple in structure, prolonged resistance to
With.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of tail pipe brace type high temperature and pressure packer nature of the utility model；
Fig. 2 is a kind of structural schematic diagram of tail pipe brace type high temperature and pressure packer setting state of the utility model；
Fig. 3 is the sectional view in the sections Fig. 2A-A；
In figure：1. top connection, 2. central tubes, 3. upper isolating rings, 4. packing elements, 5. lower isolating rings, 6. shear pins, 7. support tubes, 8. are prevented
It caps off, 9. lower contacts.
Specific implementation mode
As depicted in figs. 1 and 2, a kind of tail pipe brace type high temperature and pressure packer of the utility model, be by top connection 1, in
Heart pipe 2, packing element 4, lower isolating ring 5, shear pin 6, support tube 7, is prevented capping off 8 and the composition of lower contact 9 upper isolating ring 3；Its structure feature is：
1 upper end of top connection and top tubing string screwed connection, 9 lower end of lower contact and lower part tubing string screwed connection；It 2 upper end of central tube and above connects
The screwed connection of first 1 lower end, 2 lower end of central tube cap off 8 upper end screwed connections with anti-；It is circumferential in the middle part of 2 outer circle of central tube to be uniformly arranged
A counterbore is arranged in four axial notches, 2 outer circle lower part of central tube；4 upper end of packing element and upper isolating ring 3 vulcanization fix, 4 lower end of packing element and
The vulcanization of lower isolating ring 5 is fixed, and stepped hole is set as in the middle part of 4 endoporus of packing element, and packing element 4 is made of high temperature resistant vulcanized rubber；Support tube 7
Top is circumferentially uniformly arranged four runner through-holes, and a shear pin hole is arranged in 7 middle part of support tube, and 7 inner cavity of support tube is set as stepped hole；
Shear pin 6 is mounted in 7 middle part shear pin hole of support tube, and 6 one end of shear pin is placed in 2 outer circle lower part counterbore of central tube；7 lower end of support tube
With 9 upper end screwed connection of lower contact.
As shown in figure 3, circumferential in the middle part of 2 outer circle of central tube be uniformly arranged four axial notches；7 top of support tube is circumferentially uniform
Four runner through-holes are set.
Tripping in the utility model transfers tubing string to design position, and shear pin 6 is cut, and support tube 7 is axial to move up compression packing element
4, packing element 4 radially expands the annular space of sealing sleeve pipe and tubing string；Runner through-hole and central tube 2 of the downhole fluid through 7 top of support tube
Axial notch in the middle part of outer circle flows into 4 inner cavity of packing element, and 4 chamber pressure of packing element increases, and balances 4 external pressure of packing element, is applicable in underground
High temperature and high pressure environment.
Claims (1)
1. a kind of tail pipe brace type high temperature and pressure packer, be by top connection (1), central tube (2), upper isolating ring (3), packing element (4),
Lower isolating ring (5), support tube (7), prevents that capping off (8) and lower contact (9) is constituted at shear pin (6)；It is characterized in that：Top connection (1) upper end
With top tubing string screwed connection, lower contact (9) lower end and lower part tubing string screwed connection；Under central tube (2) upper end and top connection (1)
Screwed connection, central tube (2) lower end is held to cap off (8) upper end screwed connection with anti-；It is circumferential in the middle part of central tube (2) outer circle to be uniformly arranged
A counterbore is arranged in four axial notches, central tube (2) outer circle lower part；Packing element (4) upper end and upper isolating ring (3) vulcanization are fixed, packing element
(4) lower end and lower isolating ring (5) vulcanization are fixed, and stepped hole is set as in the middle part of packing element (4) endoporus, and packing element (4) is vulcanized using high temperature resistant
Rubber is made；Support tube (7) top is circumferentially uniformly arranged four runner through-holes, and a shear pin hole, support are arranged in the middle part of support tube (7)
Cylinder (7) inner cavity is set as stepped hole；Shear pin (6) is mounted in the middle part of support tube (7) in shear pin hole, shear pin (6) one end merging center
It manages in the counterbore of (2) outer circle lower part；Support tube (7) lower end and lower contact (9) upper end screwed connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721874697.0U CN207739983U (en) | 2017-12-28 | 2017-12-28 | A kind of tail pipe brace type high temperature and pressure packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721874697.0U CN207739983U (en) | 2017-12-28 | 2017-12-28 | A kind of tail pipe brace type high temperature and pressure packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207739983U true CN207739983U (en) | 2018-08-17 |
Family
ID=63120323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721874697.0U Expired - Fee Related CN207739983U (en) | 2017-12-28 | 2017-12-28 | A kind of tail pipe brace type high temperature and pressure packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207739983U (en) |
-
2017
- 2017-12-28 CN CN201721874697.0U patent/CN207739983U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180817 Termination date: 20181228 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |