CN116291292A - Multi-seat wellhead device - Google Patents
Multi-seat wellhead device Download PDFInfo
- Publication number
- CN116291292A CN116291292A CN202310430181.0A CN202310430181A CN116291292A CN 116291292 A CN116291292 A CN 116291292A CN 202310430181 A CN202310430181 A CN 202310430181A CN 116291292 A CN116291292 A CN 116291292A
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- Prior art keywords
- head
- hanger
- casing
- tubing
- sealing
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- Pending
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- 238000007789 sealing Methods 0.000 claims abstract description 74
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 6
- 238000009434 installation Methods 0.000 description 3
- 238000003475 lamination Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/04—Casing heads; Suspending casings or tubings in well heads
- E21B33/047—Casing heads; Suspending casings or tubings in well heads for plural tubing strings
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/04—Casing heads; Suspending casings or tubings in well heads
- E21B33/0422—Casing heads; Suspending casings or tubings in well heads a suspended tubing or casing being gripped by a slip or an internally serrated member
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention provides a multi-seat wellhead device, which relates to the technical field of wellhead devices and comprises a base, a casing head, a casing hanger, a sealing device, a tubing head, a tubing hanger and a tubing head reducing joint; the base sets up in the well head, sleeve head and tubing head pile up in proper order from bottom to top and place on the base, sleeve head and tubing head fixed connection are provided with on the sleeve head inner wall and bear the step, bear the step and fall on the casing hanger, fall on the casing hanger and have sealing device, fall on the sealing device and have tubing head, be provided with at least twice annular seal groove on the sealing device outer wall, all set up the sealing washer in the twice seal groove, the sealing washer of below is used for sealing the annular gap between sleeve head and the casing hanger, the sealing washer of top is used for sealing the annular gap between tubing head and the tubing hanger. The scheme provided by the invention adopts the bearing step to bear the oil pipe hanger and the sleeve hanger, so that the wellhead device assembly is simple to process and assemble.
Description
Technical Field
The invention relates to the technical field of wellhead devices, in particular to a multi-seat wellhead device.
Background
Wellhead devices are generally devices which are installed at a wellhead and seal annular spaces between an oil pipe and a casing and between layers of casings in oil and gas drilling.
The existing wellhead device is divided into an integral wellhead and a split wellhead, but whatever wellhead device is used for hanging an oil pipe and a sleeve pipe on different bearing steps, the processing is complex, and the assembly is difficult, so that a novel wellhead device is urgently needed to solve the problems.
Disclosure of Invention
The invention aims to provide a multi-seat wellhead device, which solves the problems in the prior art, and adopts a bearing step to bear a tubing hanger and a casing hanger, so that the wellhead device assembly is simple to process and assemble.
In order to achieve the above object, the present invention provides the following solutions:
the invention provides a multi-seat wellhead device, which comprises a base, a casing head, a casing hanger, a sealing device, a tubing head, a tubing hanger and a tubing head reducing joint, wherein the base is provided with a plurality of grooves; the base sets up in the well head, the casing head with the tubing head is from supreme stack in proper order down is arranged in on the base, the casing head with tubing head fixed connection, be provided with on the casing head inner wall and bear the step, it has the casing hanger to bear the step on, it has sealing device to fall on the casing hanger, sealing device has the tubing head to fall on, be provided with at least twice annular seal groove on the sealing device outer wall, twice all set up the sealing washer in the seal groove, the sealing washer of below be used for sealing the casing head with the annular between the casing hanger, the top the sealing washer be used for sealing the annular between tubing head with the tubing hanger.
Preferably, the sealing device can be a common sealing device or an emergency sealing device; the casing hanger may be a mandrel casing hanger or an emergency slip hanger;
when the casing is normally lowered, a common sealing device and a mandrel type casing hanger are adopted;
when the casing is blocked from being lowered, an emergency sealing device and an emergency slip hanger are adopted.
Preferably, the tubing hanger adopts a non-extension diameter, a first through hole coaxial with the tubing is arranged on the tubing hanger, a second through hole is arranged on one side of the first through hole, a cable traversing device is arranged in the second through hole in a penetrating way, and a sealing sleeve is coaxially arranged on the first through hole to seal a gap between the tubing hanger and the tubing head reducing joint.
Preferably, the tubing head reducing joint comprises a joint body and an annular flange plate, an annular flange is arranged on the peripheral side of the joint body, the flange plate is arranged on the peripheral side of the joint body and can be pressed on the annular flange plate, a plurality of bolt through holes are formed in the flange plate around the circumference, an auxiliary flange plate matched with the flange plate is arranged at the top of the tubing head, the flange plate is fixedly connected with the auxiliary flange plate through a plurality of bolts, a third through hole corresponding to the cable traversing device is formed in the joint body, and the cable traversing device penetrates out of the third through hole.
Preferably, annular gasket grooves are formed in the flange surfaces, opposite to the sleeve head and the oil pipe head, of the sleeve head, and gasket rings are placed in the gasket grooves.
Preferably, the sealing device is locked by a jackscrew mode.
Compared with the prior art, the invention has the following technical effects:
1. the multi-seat wellhead device provided by the invention adopts the bearing step to bear the tubing hanger and the casing hanger, so that the wellhead device component is simple to process and assemble.
2. The joint body and the flange plate in the oil pipe head reducing joint are of split type structures, when the oil pipe head reducing joint is installed, only the third through holes on the joint body are required to be aligned with the second through holes, the threaded holes are subsequently aligned through the adjustment of the flange plate, then the installation is completed, and the original mode of machining guide positioning grooves on a wellhead and a hanger to position a traversing device is replaced. The cost is reduced, and the operation is convenient.
3. The integrated wellhead casing top is far lower than the wellhead top, and a special inner casing cutter is required to be used for cold cutting, so that a special casing cutting tool is not required to cut the casing in the scheme provided by the invention.
4. The SR-type backing ring groove design is adopted between the opposite flange surfaces of the casing head and the oil pipe head, so that the face-to-face lamination between the 6B flanges is realized, the concentricity of the upper flange and the lower flange is ensured, and the phenomenon that the upper flange and the lower flange are not concentric due to uneven tightening force of bolts of the connecting flange is avoided, thereby influencing the entering of the sealing device and the anti-wear sleeve.
5. The sealing device adopts a jackscrew locking mode, so that the operation is convenient, and the cost is saved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a multi-seat wellhead assembly according to the present invention;
in the figure: 1. a base; 2. a casing head; 3. a ball valve; 4. a mandrel type casing hanger; 5. a common sealing device; 6. an emergency slip hanger; 7. an emergency sealing device; 8. a tubing head; 9. tubing hanger; 10. a sealing sleeve; 11. a tubing head reducing joint; 12. 13-3/8' sleeve; 13. 9-5/8' sleeve; 14. 4-1/2 oil pipe.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide a multi-seat wellhead device, which solves the problems in the prior art, and adopts a bearing step to bear a tubing hanger and a casing hanger, so that the wellhead device assembly is simple to process and assemble.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
The invention provides a multi-seat wellhead device, which is shown in figure 1 and comprises a base 1, a casing head 2, a casing hanger, a sealing device, a tubing head 8, a tubing hanger 9 and a tubing head reducing joint 11; the base 1 is arranged at a wellhead, the casing head 2 and the tubing head 8 are sequentially piled on the base 1 from bottom to top, the casing head 2 and the tubing head 8 are fixedly connected, a bearing step is arranged on the inner wall of the casing head 2, a casing hanger falls on the bearing step, a sealing device falls on the casing hanger, the tubing head 8 falls on the sealing device, at least two annular sealing grooves are arranged on the outer wall of the sealing device, sealing rings are arranged in the two sealing grooves, the sealing ring below is used for sealing an annular gap between the casing head 2 and the casing hanger, and the sealing ring above is used for sealing the annular gap between the tubing head 8 and the tubing hanger 9.
The multi-seat wellhead device provided by the invention adopts the bearing step to bear the tubing hanger and the casing hanger, so that the wellhead device component is simple to process and assemble.
In some embodiments, the sealing means may be a normal sealing means 5 or an emergency sealing means 7; the casing hanger may be a mandrel casing hanger 4 or an emergency slip hanger 6;
when the casing is normally lowered, a common sealing device 5 and a mandrel type casing hanger 4 are adopted;
when casing running is hindered, an emergency seal 7 and an emergency slip hanger 6 are used.
The multi-seat wellhead device provided by the embodiment is designed with the matched emergency slip hanger 6, when the sleeve is put down and blocked, the top of the sleeve is positioned above the sleeve head 2 so as to cut to a preset height outside the wellhead in a flame cutting mode and the like, and the top of the integral wellhead sleeve is far lower than the top of the wellhead, and a special inner sleeve cutter is required to be used for cold cutting, so that a special sleeve cutting tool is not required for cutting the sleeve in the scheme provided by the invention.
In some embodiments, the tubing hanger 9 adopts a non-extension diameter, a first through hole coaxial with the tubing is arranged on the tubing hanger 9, a second through hole is arranged on one side of the first through hole, a cable traversing device is arranged in the second through hole in a penetrating way, and a sealing sleeve 10 is coaxially arranged on the first through hole to realize the sealing of a gap between the tubing hanger 9 and a tubing head reducing joint 11.
The tubing hanger 9 in the multi-seat wellhead device provided by the embodiment adopts a design without an extension diameter, and the sealing sleeve barrel 10 is added to realize sealing of the tubing hanger and the tubing head reducing joint 11 without influencing the crossing of a cable crossing device.
In some embodiments, the tubing head reducing connector 11 comprises a connector body and an annular flange plate, the annular flange plate is arranged on the periphery of the connector body and can be pressed on the annular flange plate, a plurality of bolt through holes are formed in the flange plate around the periphery, an auxiliary flange plate matched with the flange plate is arranged at the top of the tubing head 8, the flange plate is fixedly connected with the auxiliary flange plate through a plurality of bolts, a third through hole corresponding to the cable traversing device is formed in the connector body, and the cable traversing device penetrates out of the third through hole.
The oil pipe head reducing joint 11 that this embodiment provided the many seat wellhead assembly adopted connects the body and the ring flange are split type structure, only need with connect the third through hole on the body aim at the second through hole when the installation can, make each screw hole align through adjusting the ring flange afterwards, then accomplish the installation, replaced original processing guide positioning groove on well head and hanger and carry out the mode of crossing ware location. The cost is reduced, and the operation is convenient.
In some embodiments, annular gasket grooves are provided on the opposite flange faces of the casing head 2 and the tubing head 8, and gasket rings are placed in the gasket grooves.
The SR-type backing ring groove design is adopted between the opposite flange surfaces of the casing head 2 and the tubing head 8 in the multi-seat wellhead device, so that the face-to-face lamination between the 6B flanges is realized, the concentricity of the upper flange and the lower flange is ensured, and the phenomenon that the upper flange and the lower flange are not concentric due to uneven tightening force of the connecting flange bolts is avoided, thereby influencing the entering of the sealing device and the anti-wear sleeve.
In some embodiments, the sealing device is secured by way of a jackscrew.
The sealing device in the multi-seat wellhead device provided by the embodiment adopts a jackscrew locking mode, so that the operation is convenient, and the cost is saved.
The base 1 bears the weight of the whole multi-seat wellhead device and a suspended pipe hanger.
The bottom of the casing head 2 is connected with a 13-3/8' casing 12, and the side wings are provided with ball valves 3 and other accessories such as pipe plugs, stop valves, pressure gauges and the like.
Under normal conditions: the inside 45 DEG bearing step of casing head 2 bears mandrel type casing hanger 4, the bottom of mandrel type casing hanger 4 is connected with 9-5/8' casing 13, SR backing ring grooves are processed on the flange surface of tubing head 8 and casing head 2, the face-to-face lamination of 6B flange is realized, the phenomenon that tubing head 8 and casing head 2 are not concentric is avoided, common sealing device 5 is arranged above mandrel type casing hanger 4, jackscrew locking is adopted, and the sealing between annular spaces is realized.
When the casing is lowered and blocked, the emergency slip hanger 6 and the emergency sealing device 7 are adopted, and as the casing is higher than the flange surface of the casing head 2, a special casing cutting tool is not needed unlike an integral wellhead.
The inside of the tubing head 8 is free of bearing steps, a 4-1/2 tubing 14 is connected below the tubing hanger 9, and the tubing hanger 9 is lowered on a 45-degree inclined plane of the common sealing device 5 or the emergency sealing device 7. When the oil pipe hanger 9 is installed, the sealing sleeve 10 is installed, the reducing joint 11 of the ESP oil pipe head is installed, and after the cable traversing device is aligned, the rotary flange is adjusted and bolts are tightened.
The principles and embodiments of the present invention have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present invention; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (6)
1. A multi-seat wellhead assembly, characterized by: the device comprises a base, a casing head, a casing hanger, a sealing device, a tubing head, a tubing hanger and a tubing head reducing joint; the base sets up in the well head, the casing head with the tubing head is from supreme stack in proper order down is arranged in on the base, the casing head with tubing head fixed connection, be provided with on the casing head inner wall and bear the step, it has the casing hanger to bear the step on, it has sealing device to fall on the casing hanger, sealing device has the tubing head to fall on, be provided with at least twice annular seal groove on the sealing device outer wall, twice all set up the sealing washer in the seal groove, the sealing washer of below be used for sealing the casing head with the annular between the casing hanger, the top the sealing washer be used for sealing the annular between tubing head with the tubing hanger.
2. The multi-seat wellhead assembly of claim 1 wherein: the sealing device can be a common sealing device or an emergency sealing device; the casing hanger may be a mandrel casing hanger or an emergency slip hanger;
when the casing is normally lowered, a common sealing device and a mandrel type casing hanger are adopted;
when the casing is blocked from being lowered, an emergency sealing device and an emergency slip hanger are adopted.
3. The multi-seat wellhead assembly of claim 1 wherein: the oil pipe hanger is of a non-extension diameter, a first through hole coaxial with the oil pipe is formed in the oil pipe hanger, a second through hole is formed in one side of the first through hole, a cable traversing device is arranged in the second through hole in a penetrating mode, and a sealing sleeve is coaxially arranged on the first through hole to seal a gap between the oil pipe hanger and the oil pipe head reducing joint.
4. A multi-seat wellhead assembly according to claim 3, wherein: the oil pipe head reducing joint comprises a joint body and an annular flange plate, wherein an annular flange is arranged on the peripheral side of the joint body, the flange plate is arranged on the peripheral side of the joint body and can be tightly pressed on the annular flange plate, a plurality of bolt through holes are formed in the flange plate around the circumference, an auxiliary flange plate matched with the flange plate is arranged at the top of the oil pipe head, the flange plate is fixedly connected with the auxiliary flange plate through a plurality of bolts, a third through hole corresponding to the cable traversing device is formed in the joint body, and the cable traversing device penetrates out of the third through hole.
5. The multi-seat wellhead assembly of claim 1 wherein: annular gasket grooves are formed in the flange surfaces, opposite to the sleeve head and the oil pipe head, of the sleeve head, and gasket rings are placed in the gasket grooves.
6. The multi-seat wellhead assembly of claim 1 wherein: the sealing device is locked by a jackscrew mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310430181.0A CN116291292A (en) | 2023-04-21 | 2023-04-21 | Multi-seat wellhead device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310430181.0A CN116291292A (en) | 2023-04-21 | 2023-04-21 | Multi-seat wellhead device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116291292A true CN116291292A (en) | 2023-06-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310430181.0A Pending CN116291292A (en) | 2023-04-21 | 2023-04-21 | Multi-seat wellhead device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116291292A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117905409A (en) * | 2024-03-19 | 2024-04-19 | 威飞海洋装备制造有限公司 | Novel multi-seat wellhead device and wellhead drilling method |
-
2023
- 2023-04-21 CN CN202310430181.0A patent/CN116291292A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117905409A (en) * | 2024-03-19 | 2024-04-19 | 威飞海洋装备制造有限公司 | Novel multi-seat wellhead device and wellhead drilling method |
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