CN210509088U - Underground seat sealing device - Google Patents
Underground seat sealing device Download PDFInfo
- Publication number
- CN210509088U CN210509088U CN201921380382.XU CN201921380382U CN210509088U CN 210509088 U CN210509088 U CN 210509088U CN 201921380382 U CN201921380382 U CN 201921380382U CN 210509088 U CN210509088 U CN 210509088U
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- China
- Prior art keywords
- annular movable
- movable chamber
- annular
- central pipe
- seat sealing
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Abstract
The utility model relates to a seat seals device in pit. A downhole seat sealing device comprises a shell and a central pipe, wherein a floating piston, a valve body and a driving piston are sequentially arranged between the shell and the central pipe along the upward direction of the central pipe, and the part between the shell and the central pipe is divided into 4 annular movable chambers; the number 1 annular movable chamber, the number 2 annular movable chamber, the number 3 annular movable chamber and the number 4 annular movable chamber are respectively arranged, and the number 4 annular movable chamber is also provided with a valve for fluid to flow out; the device comprises a base seal, a base seal and a driving link, wherein the base seal comprises a cone, a base seal and a driving link; wherein the seat seal is arranged on the cone in a sliding manner; one end of the driving link passes through the No. 4 annular movable chamber and is connected to the driving piston, and the other end of the driving link is connected with the seat sealing device; the valve body is communicated with the No. 2 annular movable cavity and the No. 3 annular movable cavity, and substances in the No. 2 annular movable cavity are viscous fluid. The utility model discloses the good reliability, simple structure, it is with low costs, the feasibility is high.
Description
Technical Field
The utility model relates to an oil bores well completion technical field, especially relates to an underground seat sealing device.
Background
In the oil and gas industry, component setting around central pipes such as slips or rubber sleeves is very common, and the operation purpose is to seal an annular space or support a pipe string. Mechanical and hydraulic seating are most commonly used at present, but openings must be provided in the pipe wall, thus risking leakage and reducing reliability. In a device without openings in the pipe wall, the setting process must generate pressure downhole, which is extremely complex and expensive, and the available space is extremely limited and not very feasible.
Disclosure of Invention
An object of the utility model is to provide a seat seals device in pit utilizes the energy promotion seat that compressible fluid stored to seal and accomplishes the seat, need not to set up the opening on central pipe wall, and the good reliability, simple structure, it is with low costs, the feasibility is high, has overcome the not enough of technique in the past.
The technical scheme of the utility model lies in:
a downhole setting device comprises a shell and a central pipe, wherein the central pipe penetrates through the center of the shell; a floating piston, a valve body and a driving piston are sequentially arranged between the shell and the central pipe along the upward direction of the central pipe, and the part between the shell and the central pipe is divided into 4 annular movable chambers; the number 1 annular movable chamber, the number 2 annular movable chamber, the number 3 annular movable chamber and the number 4 annular movable chamber are respectively arranged, and the number 4 annular movable chamber is also provided with a valve for fluid to flow out; the device comprises a base seal, a base seal and a driving link, wherein the base seal comprises a cone, a base seal and a driving link; wherein the seat seal is arranged on the cone in a sliding manner; one end of the driving link passes through the No. 4 annular movable chamber and is connected to the driving piston, and the other end of the driving link is connected with the seat sealing device; the valve body is communicated with the No. 2 annular movable chamber and the No. 3 annular movable chamber, and the valve body is also provided with a switch which can enable the substance in the No. 2 annular movable chamber to flow to the No. 3 annular movable chamber, so that the volume of the No. 3 annular movable chamber is increased and the valve body pushes the driving piston to move upwards; the substance in the No. 2 annular movable chamber is viscous fluid.
The valve body comprises a communicating pipe positioned between the No. 2 annular movable chamber and the No. 3 annular movable chamber, and the communicating pipe is provided with a sensor and a control valve controlled by the sensor; an external magnetic projectile is also included.
The No. 4 annular movable chamber is provided with an annular groove for a driving link to pass through and preventing fluid from entering; the size of the annular groove is matched with the size of the driving link.
The valve is a check valve.
Compressible fluid is arranged in the No. 1 annular movable chamber; the viscous fluid in the No. 2 annular movable chamber is light oil.
One side of the floating piston, the driving piston and the valve body is sealed with the shell, and the other side of the floating piston, the driving piston and the valve body is sealed with the central pipe.
The seat sealing piece is a metal slip or an elastomer.
The technical effects of the utility model reside in that:
the utility model has the advantages that utilize the energy promotion seat that compressible fluid stored to seal the piece and accomplish the seat, need not to set up the opening on the central pipe wall, the good reliability, simple structure, it is with low costs, the feasibility is high.
Drawings
Fig. 1 is a schematic structural diagram of the downhole setting device of the present invention.
Fig. 2 is a schematic diagram of the downhole setting device after completing setting.
Reference numerals: 1-center tube, 2-housing, 3-floating piston, 4-valve body, 5-control valve, 6-sensor, 7-driving piston, 8-check valve, 9-driving link, 10-seat seal, 11-cone, 12-1# annular movable chamber, 13-2# annular movable chamber, 14-3# annular movable chamber, 15-4# annular movable chamber, 16-compressible fluid, 17-viscous fluid, 18-annular groove, 19-magnetic projectile, 20-communicating tube, 21-sleeve.
Detailed Description
Example 1
A downhole setting device comprises a shell 2 and a central pipe 1, wherein the central pipe 1 penetrates through the center of the shell 2; a floating piston 3, a valve body 4 and a driving piston 7 are sequentially arranged between the shell 2 and the central pipe 1 along the upward direction of the central pipe 1, and the part between the shell 2 and the central pipe 1 is divided into 4 annular movable chambers; the number 1 annular movable chamber 12, the number 2 annular movable chamber 13, the number 3 annular movable chamber 14 and the number 4 annular movable chamber 15 are respectively, and the number 4 annular movable chamber 15 is also provided with a valve for fluid to flow out; the device further comprises a seat sealing device, wherein the seat sealing device comprises a cone 11, a seat sealing piece 10 and a driving link 9; wherein, the seat seal 10 is arranged on the cone 11 in a sliding way; one end of the driving link 9 is connected to the driving piston 7 through a No. 4 annular movable chamber 15, and the other end is connected with the seat sealing device; the valve body 4 is communicated with the No. 2 annular movable chamber 13 and the No. 3 annular movable chamber 14, and the valve body 4 is also provided with a switch which can enable substances in the No. 2 annular movable chamber 13 to flow to the No. 3 annular movable chamber 14, so that the volume of the No. 3 annular movable chamber 14 is increased, and the switch can push the driving piston 7 to move upwards; the substance in the # 2 annular movable chamber 13 is a viscous fluid 17.
The specific implementation process of the embodiment is as follows:
the downhole setting device of the embodiment is lowered along with the casing 21; thus, the maximum outer diameter of the present downhole seating device should not be greater than the inner diameter of the casing 21; when descending: when the drive link 9 moves to make the volume of the No. 4 annular movable chamber 15 smaller, the fluid in the No. 4 annular movable chamber 15 flows to the annular space between the shell 2 and the sleeve 21 through the check valve 8;
when ascending: when the switch receives an external opening command, the substance in the No. 2 annular movable chamber 13 flows to the No. 3 annular movable chamber 14, so that the volume of the No. 3 annular movable chamber 14 is increased, the driving piston 7 is pushed to move upwards, the driving link 9 pushes the seat sealing piece 10 to move upwards along the cone 11, the cone 11 moves outwards, and the seat sealing of the whole underground seat sealing device is completed because the seat sealing piece 10 is in contact engagement with the inner wall of the sleeve 21; meanwhile, during the ascending process, the surrounding fluid cannot enter the No. 4 annular movable chamber 15.
Example 2
On the basis of embodiment 1, the method further comprises the following steps: the valve body 4 comprises a communicating pipe 20 positioned between a No. 2 annular movable chamber 13 and a No. 3 annular movable chamber 14, and the communicating pipe 20 is provided with a sensor 6 and a control valve 5 controlled by the sensor 6; an external magnetic projectile 19 is also included.
The No. 4 annular movable chamber 15 is provided with an annular groove 18 through which the driving link 9 passes and into which fluid cannot enter; the size of the annular groove 18 matches the size of the drive link 9. Said valve being a check valve 8. The No. 1 annular movable chamber 12 is internally provided with a compressible fluid 16; the viscous fluid 17 in the # 2 annular movable chamber 13 is light oil. One side of the floating piston 3, the driving piston 7 and the valve body 4 is sealed with the shell 2, and the other side is sealed with the central pipe 1. The seat seal 10 is a metal slip or an elastomer.
The specific implementation process of the embodiment is as follows:
when descending: the control valve 5 is in a closed state; light oil 17 is stored in # 2 annular movable chamber 13; when the drive link 9 moves to make the volume of the No. 4 annular movable chamber 15 smaller, the fluid in the No. 4 annular movable chamber 15 flows to the annular space between the shell 2 and the sleeve 21 through the check valve 8;
when ascending: when the magnetic throwing object 19 from the ground passes through the valve body 4, the sensor 6 is subjected to a signal of the change of the magnetic field to open the control valve 5; upon opening of the control valve 5, the energy stored in the compressible fluid 16 in the # 1 annular active chamber 12 is released, causing the volume of the # 1 annular active chamber 12 to increase; meanwhile, the light oil in the No. 2 annular movable chamber 13 flows to the No. 3 annular movable chamber 14, the volume of the No. 3 annular movable chamber 14 is increased, and the driving piston 7 is pushed to move upwards, so that the driving link 9 pushes the seat sealing piece 10 to move upwards along the cone 11, the cone 11 moves outwards, and the seat sealing of the whole underground seat sealing device is completed because the seat sealing piece 10 is in contact engagement with the inner wall of the sleeve 21; meanwhile, during the ascending process, the surrounding fluid cannot enter the No. 4 annular movable chamber 15 due to the sealing at the annular groove 18.
Each device is a commercially available product. For example, the control valve 5 is a stainless steel solenoid valve of type ZBS15K manufactured by shanghai kura solenoid valve manufacturing ltd; the sensor 6 is an SP111 type magnetic proximity switch sensor produced by Shenzhen City believes of science and technology development Limited; the check valve 8 is a wafer type check valve manufactured by GH-06H71 DN10 from salt city fine work valve Limited.
Claims (7)
1. A downhole setting device comprises a housing (2) and a central pipe (1), wherein the central pipe (1) penetrates through the center of the housing (2); the method is characterized in that: a floating piston (3), a valve body (4) and a driving piston (7) are sequentially arranged between the shell (2) and the central pipe (1) along the ascending direction of the central pipe (1), and the part between the shell (2) and the central pipe (1) is divided into 4 annular movable chambers; the number 1 annular movable chamber (12), the number 2 annular movable chamber (13), the number 3 annular movable chamber (14) and the number 4 annular movable chamber (15) are respectively arranged, and a valve for fluid to flow out is further arranged on the number 4 annular movable chamber (15); the device further comprises a seat sealing device, wherein the seat sealing device comprises a cone (11), a seat sealing piece (10) and a driving link (9); wherein, the seat sealing piece (10) is arranged on the cone (11) in a sliding way; one end of the driving link (9) penetrates through the No. 4 annular movable chamber (15) to be connected to the driving piston (7), and the other end of the driving link is connected with the seat sealing device; the valve body (4) is communicated with the No. 2 annular movable chamber (13) and the No. 3 annular movable chamber (14), and the valve body (4) is further provided with a switch which can enable substances in the No. 2 annular movable chamber (13) to flow to the No. 3 annular movable chamber (14) so as to enlarge the volume of the No. 3 annular movable chamber (14) and push the driving piston (7) to move upwards; the substance in the No. 2 annular movable chamber (13) is viscous fluid (17).
2. A downhole setting apparatus as defined in claim 1, wherein: the valve body (4) comprises a communicating pipe (20) positioned between a No. 2 annular movable chamber (13) and a No. 3 annular movable chamber (14), and a sensor (6) and a control valve (5) controlled by the sensor (6) are arranged on the communicating pipe (20); also included is an external magnetic projectile (19).
3. A downhole setting apparatus as defined in claim 2, wherein: the No. 4 annular movable chamber (15) is provided with an annular groove (18) through which the driving link (9) passes and fluid cannot enter; the size of the annular groove (18) is matched with the size of the drive link (9).
4. A downhole setting apparatus as defined in claim 3, wherein: the valve is a check valve (8).
5. A downhole setting device according to claim 4, wherein: a compressible fluid (16) is arranged in the No. 1 annular movable chamber (12); the viscous fluid (17) in the No. 2 annular movable chamber (13) is light oil.
6. A downhole setting apparatus as defined in claim 5, wherein: one side of the floating piston (3), the driving piston (7) and the valve body (4) is sealed with the shell (2), and the other side is sealed with the central pipe (1).
7. A downhole setting apparatus as defined in claim 6, wherein: the seat sealing piece (10) is a metal slip or an elastomer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921380382.XU CN210509088U (en) | 2019-08-23 | 2019-08-23 | Underground seat sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921380382.XU CN210509088U (en) | 2019-08-23 | 2019-08-23 | Underground seat sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210509088U true CN210509088U (en) | 2020-05-12 |
Family
ID=70591338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921380382.XU Expired - Fee Related CN210509088U (en) | 2019-08-23 | 2019-08-23 | Underground seat sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210509088U (en) |
-
2019
- 2019-08-23 CN CN201921380382.XU patent/CN210509088U/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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200512 Termination date: 20210823 |