CN210396686U - Rotary press-in type combined sealing device for ocean wellhead - Google Patents
Rotary press-in type combined sealing device for ocean wellhead Download PDFInfo
- Publication number
- CN210396686U CN210396686U CN201921089731.2U CN201921089731U CN210396686U CN 210396686 U CN210396686 U CN 210396686U CN 201921089731 U CN201921089731 U CN 201921089731U CN 210396686 U CN210396686 U CN 210396686U
- Authority
- CN
- China
- Prior art keywords
- sealing device
- ring
- support frame
- sealing
- metal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The utility model discloses an ocean is rotatory forced combination sealing device for well head, including the drive swivel nut, the lower extreme and the upper portion metal seal ring of drive swivel nut are connected, and upper portion metal seal ring passes through seal support frame with lower part metal seal ring to be connected, and the inner wall of drive swivel nut is provided with internal thread. The annular space between the underwater high-pressure well head and the casing hanger can be effectively sealed, the annular pressure in the oil-gas well can be controlled, the lowering and installation process is simple, and the problem that the whole sealing device is difficult to recover is solved.
Description
Technical Field
The utility model belongs to the technical field of the marine oil drilling and production sealing device, concretely relates to ocean is rotatory forced combination sealing device for well head.
Background
The underwater wellhead device is key equipment for marine oil and gas geophysical prospecting development, and is mainly used for supporting the weight of a sleeve pipe column and effectively sealing the annular space of the sleeve pipe column, so that the reliability of marine drilling and production can be directly influenced by the performance of the annular space sealing device of the underwater wellhead device.
At present, the annular sealing device between the high-pressure wellhead of the marine underwater wellhead device and the casing hanger is mostly in the structural form of all metals, the installation process applies gravity to press the sealing device to generate metal deformation through a sending tool so as to enable sealing to take effect, and a plurality of defects exist: (1) the structure is complex, the sealing device has a plurality of parts, and the assembling and disassembling processes are complex, tedious and time-consuming; (2) the sealing device is difficult to lower and install, and the setting position and the sealing effect are not ensured well; (3) the integral recovery is difficult after the sealing installation fails, and the damage to the sealing surface of the wellhead is easy to happen in the recovery process.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an ocean is rotatory forced combination sealing device for well head can not only effectively seal off under water the annular space between the high-pressure well head and the casing hanger ensure the controllable of annular pressure in the oil gas well, transfer the installation moreover simple to the problem of the whole difficulty of retrieving of sealing device has been solved.
The utility model discloses the technical scheme who adopts is, a rotatory forced combination sealing device for ocean well head, including the drive swivel nut, the lower extreme and the upper portion metal seal ring of drive swivel nut are connected, and upper portion metal seal ring passes through the seal support frame with lower part metal seal ring to be connected, and the inner wall of drive swivel nut is provided with internal thread.
The utility model is also characterized in that,
and a slurry backflow groove and a torque driving key groove are formed in the inner wall of the driving threaded sleeve along the axial direction of the driving threaded sleeve.
The lower end of the driving threaded sleeve is connected with the upper metal sealing ring through a C-shaped locking ring, the C-shaped locking ring is positioned through a locking ring fixing screw, and the C-shaped locking ring is open.
The sealing support frame is respectively connected with the upper metal sealing ring and the sealing support frame through welding.
The lower end of the upper metal sealing ring, the sealing support frame and the upper end of the lower metal sealing ring are provided with non-metal sealing rings in a rubber vulcanization mode.
The sealing support frame is provided with a plurality of vertical cutting grooves.
The beneficial effects of the utility model reside in that:
(1) the utility model relates to a rotary press-in type combined sealing device for an ocean well head, which adopts a combined sealing mode and ensures more reliable sealing through the combined action of an upper metal sealing ring, a lower metal sealing ring and a non-metal sealing ring;
(2) the utility model relates to a rotatory forced combination sealing device for ocean well head accurately judges whether the seal is in place by adjusting the number of turns of rotation and the torque value, and the installation and the disassembly can be completed by rotating the tool, the operation is simple;
(3) the utility model relates to a rotatory forced combination sealing device for ocean well head, upper portion metal seal ring, lower part metal seal ring, nonmetal sealing ring connect into an entirety through the sealed support frame, have improved the tensile ability, guarantee to seal and can wholly retrieve;
(4) the utility model relates to an ocean is rotatory forced combination sealing device for well head, drive swivel nut and upper portion metal seal ring pass through C type catch and are connected, simple structure is compact, and simple to operate is swift.
Drawings
Fig. 1 is a schematic structural diagram of a rotary press-in type combined sealing device for an ocean wellhead according to the present invention;
fig. 2 is a schematic view of a seal support frame in the rotary press-in type combined seal device for an ocean wellhead according to the present invention;
fig. 3 is the utility model discloses a structure schematic diagram is accomplished with rotatory forced combination sealing device installation to ocean well head.
In the figure, 1, a driving threaded sleeve, 2, a mud return groove, 3, a C-shaped locking ring, 4, an upper metal sealing ring, 5, a sealing support frame, 6, a non-metal sealing ring, 7, a lower metal sealing ring, 8, a locking ring fixing screw, 9, a torque driving key groove, 10, internal threads, 11, a vertical cutting groove, 12, a high-pressure wellhead, 13, a combined sealing device, 14, a locking ring and 15 are casing hangers.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The utility model relates to an ocean is rotatory forced combination sealing device for well head, as shown in fig. 1 and fig. 3, including drive swivel nut 1, the lower extreme and the upper portion metal seal ring 4 of drive swivel nut 1 are connected, upper portion metal seal ring 4 is connected through sealed support frame 5 with lower part metal seal ring 7, the lower extreme of upper portion metal seal ring 4, the mode of rubber vulcanization is passed through to sealed support frame 5 and lower part metal seal ring 7's upper end, adopt non-metal seal ring 6 to link together it, thereby increase sealing device's whole tensile ability, the inner wall of drive swivel nut 1 is provided with internal thread 10, internal thread 10 is used for being connected with casing hanger 15.
The inner wall of the driving threaded sleeve 1 is provided with a slurry backflow groove 2 and four torque driving key grooves 9 along the axial direction, the four torque driving key grooves 9 are arranged in a centrosymmetric mode, the torque driving key grooves 9 are used for being connected with an installation tool to be placed, and the combined sealing device is placed to the sealing position and the recovery of the combined sealing device.
The lower end of the driving threaded sleeve 1 is connected with an upper metal sealing ring 4 through a C-shaped locking ring 3, the C-shaped locking ring 3 is open, and the C-shaped locking ring 3 is inserted in place and then positioned through a locking ring fixing screw 8.
The sealing support frame 5 is respectively connected with the upper metal sealing ring 4 and the sealing support frame 5 through welding.
As shown in fig. 2, the sealing support frame 5 is provided with a plurality of vertical grooves 11, and when the rubber at the lower end of the upper metal sealing ring 4, the sealing support frame 5 and the upper end of the lower metal sealing ring 7 is vulcanized, the rubber enters the vertical grooves 11, so that the contact area between the rubber and the sealing support frame is increased, and the tensile capacity of the sealing device is improved.
The utility model relates to an ocean is rotatory forced combination sealing device's for well head working process as follows: the installation process comprises the following steps: as shown in fig. 1, the upper metal seal ring 4 is connected to the seal support frame 5 and the lower metal seal ring 7, the lower end of the upper metal seal ring 4, the upper ends of the seal support frame 5 and the lower metal seal ring 7 are connected to the non-metal seal ring 6 by means of rubber vulcanization, and the seal unit after rubber vulcanization and the drive screw sleeve 1 are connected to the upper metal seal ring 4 by means of the C-shaped lock ring 3, thereby completing the assembly.
The torque driving key groove 9 arranged on the inner wall of the driving threaded sleeve 1 is connected with a lowering installation tool, as shown in figure 3, the lowering installation tool is used for sending the combined sealing device 13 of the utility model into a specific sealing position, the rotating lowering installation tool drives the combined sealing device 13 to rotate, then the combined sealing device 13 moves downwards along the casing hanger 15 and is pressed into the annular space between the high-pressure well head 12 and the casing hanger 15 until the locking ring 14 on the casing hanger 15 is opened and is squeezed into the locking groove in the high-pressure well head 12, so that the upper metal sealing ring 4 and the lower metal sealing ring 7 are extruded and deformed, and the annular metal is sealed to metal; and finally, lifting upwards, recovering and lowering the mounting tool to complete sealing mounting.
The recovery process comprises the following steps: transfer the recovery instrument, rotate the drive key on the recovery instrument and get into moment of torsion drive keyway 9 after placing casing hanger 15 up end until the seat, continue rotatory recovery instrument again and drive the utility model discloses a combined sealing device 13 rotates, makes it withdraw from casing hanger 15 completely along casing hanger 15 upward movement until combined sealing device 13's internal thread, then lifts the recovery instrument and takes out whole combined sealing device 13.
In this way, the rotary press-in type combined sealing device for the ocean wellhead is simple and rapid in installation and recovery operations as the torque driving key groove is formed in the inner wall of the inner threaded sleeve and is matched with the driving keys of the downward installation tool and the recovery tool, so that installation and recovery are completed; the driving threaded sleeve is connected with the upper metal sealing ring through a C-shaped locking ring, so that the structure is simple and compact; the upper metal sealing ring and the lower metal sealing ring are connected through the sealing support frame, and the upper metal sealing ring, the lower metal sealing ring and the sealing support frame are connected into a whole through the non-metal sealing ring in a rubber vulcanization mode, so that the tensile capacity of the sealing device is improved, and the sealing device can be integrally recycled; the utility model discloses can effectively seal off the annular space between the oral and casing hanger of high pressure well under water and ensure the controllable of annular pressure in the oil gas well.
Claims (6)
1. The utility model provides an ocean is rotatory forced combination sealing device for well head, its characterized in that, includes drive swivel nut (1), the lower extreme and the upper portion metal seal ring (4) of drive swivel nut (1) are connected, upper portion metal seal ring (4) are connected through sealed support frame (5) with lower part metal seal ring (7), the inner wall of drive swivel nut (1) is provided with internal thread (10).
2. A rotary press-in combination seal device for an offshore wellhead according to claim 1 characterised in that the inner wall of the drive nut (1) is provided with a slurry backwash groove (2) and a torque drive keyway (9) in its axial direction.
3. A rotary press-in combination sealing device for an offshore wellhead according to claim 1 characterized in that the lower end of the driving screw sleeve (1) is connected with the upper metal sealing ring (4) through a C-shaped locking ring (3), the C-shaped locking ring (3) is positioned through a locking ring fixing screw (8), and the C-shaped locking ring (3) is open.
4. A rotary press-in combination sealing device for marine wellheads according to claim 1, characterised in that the seal support frame (5) is connected with the upper metal seal ring (4) and the seal support frame (5) respectively by welding.
5. A rotary press-in combination sealing device for marine wellheads according to claim 4, characterised in that the lower end of the upper metal sealing ring (4), the upper end of the sealing support frame (5) and the lower metal sealing ring (7) are provided with non-metal sealing rings (6) by means of rubber vulcanization.
6. A rotary-press-in combination sealing device for an offshore wellhead according to claim 1, 4 or 5, characterized in that the seal support frame (5) is provided with a plurality of vertical slots (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921089731.2U CN210396686U (en) | 2019-07-12 | 2019-07-12 | Rotary press-in type combined sealing device for ocean wellhead |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921089731.2U CN210396686U (en) | 2019-07-12 | 2019-07-12 | Rotary press-in type combined sealing device for ocean wellhead |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210396686U true CN210396686U (en) | 2020-04-24 |
Family
ID=70355975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921089731.2U Active CN210396686U (en) | 2019-07-12 | 2019-07-12 | Rotary press-in type combined sealing device for ocean wellhead |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210396686U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112377141A (en) * | 2020-12-08 | 2021-02-19 | 重庆前卫科技集团有限公司 | Spare locking device for oil pipe hanger of underwater Christmas tree |
-
2019
- 2019-07-12 CN CN201921089731.2U patent/CN210396686U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112377141A (en) * | 2020-12-08 | 2021-02-19 | 重庆前卫科技集团有限公司 | Spare locking device for oil pipe hanger of underwater Christmas tree |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204252973U (en) | Split type downhole choke ware | |
| CN112610176B (en) | Construction process for recovering abandoned well casing | |
| CN210396686U (en) | Rotary press-in type combined sealing device for ocean wellhead | |
| CN112282681B (en) | Casing hanger and sealing assembly lowering tool | |
| CN210798910U (en) | Tool for lowering underwater wellhead head sleeve pipe hanger and sealing assembly | |
| CN101798911B (en) | Underwater wellhead reclaiming tool | |
| CN109267962B (en) | Motor-driven compression rubber cylinder type downhole blowout preventer | |
| CN208594878U (en) | Oil-water well wellhead jacking and centering device | |
| CN108547589B (en) | Method for producing tubular column without killing well by electric setting recoverable hanging packer | |
| CN201883976U (en) | Down-hole pipe salvaging cylinder | |
| CN111005696B (en) | Umbrella type rock debris fishing tool for horizontal well | |
| CN112112588A (en) | Press-in type rope coring drilling tool and coring process method thereof | |
| CN111350462B (en) | Deepwater surface layer conduit feeding tool release simulation experiment device and method | |
| CN112610177B (en) | Extrusion device and extrusion operation method for abandoned well casing recovery operation | |
| CN106050178B (en) | A kind of drilling tool is salvaged and uses steel wire rope pusher | |
| CN201201146Y (en) | Bottom flange shackle apparatus of well drilling blowout preventer | |
| CN109556807B (en) | Annular sealing assembly test equipment and installation test method thereof | |
| CN111425158B (en) | Downhole tubular column cutting device for oil well and use method thereof | |
| CN105484692B (en) | A kind of comprehensive shaft mouth operation instrument and its application method | |
| CN201620794U (en) | Underwater well mouth head recovery tool | |
| CN107178328B (en) | Method and device for lowering and recycling inner cylinder of rotary control head | |
| CN212272109U (en) | Compression type testing sealing device for directional well | |
| CN201037391Y (en) | Deep layer anti-theft high-pressure resistant exhaust double-layer oil-water-gas well sealing equipment | |
| CN217976140U (en) | Valve ball and ball seat fishing device | |
| CN114198045B (en) | Inner tree cap device for shallow water underwater Christmas tree and application method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201221 Address after: 721002 No.2 Dongfeng Road, Jintai District, Baoji City, Shaanxi Province Patentee after: Baoji Oilfield Machinery Co.,Ltd. Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC national oil and gas drilling equipment Engineering Technology Research Center Co., Ltd Address before: 721002 No.2 Dongfeng Road, Jintai District, Baoji City, Shaanxi Province Patentee before: Baoji Oilfield Machinery Co.,Ltd. |
|
| TR01 | Transfer of patent right |