CN219241872U - Pressure-release eccentric plug for christmas tree - Google Patents
Pressure-release eccentric plug for christmas tree Download PDFInfo
- Publication number
- CN219241872U CN219241872U CN202320210438.7U CN202320210438U CN219241872U CN 219241872 U CN219241872 U CN 219241872U CN 202320210438 U CN202320210438 U CN 202320210438U CN 219241872 U CN219241872 U CN 219241872U
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- screw rod
- screw
- plug
- pressure
- eccentric
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- 241000191291 Abies alba Species 0.000 title claims abstract description 28
- 230000006837 decompression Effects 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims description 36
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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Abstract
The utility model relates to a decompression type eccentric plug for a christmas tree, which comprises a double-end screw rod (1) and a screw cap (2), wherein screw rod eccentric decompression holes (11) and screw cap decompression holes (21) are respectively formed in the double-end screw rod (1) and the screw cap (2), the screw cap (2) is in threaded connection with the double-end screw rod (1) through rotation and has a screwing state and a unscrewing state, a screw rod eccentric decompression hole (11) is plugged by a rear cover of the screw cap in the screwing state, and a gap capable of communicating the screw rod eccentric decompression hole (11) with the screw cap decompression hole (21) is formed between the screw cap in the unscrewing state and a screw rod plug (15). The pressure-releasing type eccentric plug for the christmas tree is simple in structure and durable, and the screw rod eccentric pressure releasing hole can be communicated with the screw cap pressure releasing hole only by rotating the screw cap, so that the pressure in a system is released, the operation risk and the operation strength of operators are reduced, and the safe and stable production operation is ensured.
Description
Technical Field
The utility model relates to the technical field of wellhead equipment of oil fields, in particular to a plug for a christmas tree.
Background
The christmas tree is a wellhead control device of an oil well, and can provide conditions for workover operations such as steel wires, cables, continuous oil pipes and the like. The production tree comprises a flange and a choke, the flange and the choke are plugged through the choke, the choke is required to be disassembled when the flow is switched or the choke is replaced by the wellhead, when the choke is disassembled, the valve on the outer side of the production tree and positioned on the upstream of the choke is required to be closed, so that a pressure source is cut off, the choke is slowly screwed by an operator, the pressure is relieved by utilizing a gap between the choke and the screw, and the pressure is relieved by a clamp head of the installation choke due to the fact that the leak or the valve is not tightly closed in a front-end gate of the choke, and the risk is brought to the operation of disassembling the choke due to the fact that the pressure cannot be relieved by the pipe section, for example, the choke is easy to jump out to hurt people when the choke is disassembled, or the operator is injured by high-pressure medium in the pressure relief process.
In order to avoid detaching the plug operation and causing the incident, the prior art provides the technical scheme of "pressure release plug", and pressure release plug can be seen in the content that is disclosed in the patent document of the bulletin number CN208330273 of authorizing, this pressure release plug sets up the pressure release passageway in the inside of plug, links to each other pressure release passageway and pressure release pipeline to set up the relief valve on the pressure release pipeline, the relief valve is the needle valve, when the pressure between needs release sleeve pipe valve and the plug, can be through opening the pressure release between sleeve pipe valve and the plug of mode convenient and fast of needle valve, in order to guarantee staff's personal safety when detaching the plug. However, in the pressure relief plug, the pressure relief channel is formed by a central hole formed in the pressure relief plug, the pressure relief pipeline mounted on the pressure relief plug is directly communicated with the pressure relief channel, and the pressure relief pipeline is disconnected by the action of a needle valve mounted on the pressure relief pipeline.
Disclosure of Invention
The utility model aims to provide a decompression type eccentric plug for a christmas tree, which solves the technical problems that the compression resistance and the sealing performance in the prior art are difficult to keep reliable in long-term use.
The utility model provides a decompression type eccentric plug for a christmas tree, which comprises a double-end screw rod and a screw cap, wherein the double-end screw rod and the screw cap are provided with coaxial central axes extending forwards and backwards; the nut is provided with an inner hole extending from front to back and a rear cover; the double-end screw rod is internally provided with screw rod eccentric pressure relief holes which are parallel to the central axis and spaced by a set distance, and the screw cap is internally provided with screw cap pressure relief holes on the central axis; the rear end of the double-end screw rod is provided with a screw rod plug positioned behind the screw rod connecting threads, a screw rod jack for inserting the screw rod plug is arranged in an inner hole of the screw rod, a first sealing structure is arranged between the screw rod jack and the screw rod plug, and the front end face of the screw rod rear cover is provided with a second sealing structure for sealing the rear end of the screw rod eccentric pressure relief hole; the screw cap is in threaded connection with the double-headed screw rod and is provided with a screwing state and a unscrewing state, the screw rod eccentric pressure relief hole is plugged by the rear cover of the screw cap in the screwing state, and a gap capable of communicating the screw rod eccentric pressure relief hole with the screw rod pressure relief hole is formed between the rear cover of the screw cap in the unscrewing state and the screw rod plug.
The pressure-releasing type eccentric plug for the christmas tree provided by the utility model has the advantages that the central channel in the pressure-releasing plug in the prior art is replaced by the screw rod eccentric pressure-releasing hole, the structure is simple and durable, the valve core and valve seat structure in the original switch valve with complex structure are omitted, when the plug is required to be disassembled due to production, the screw rod eccentric pressure-releasing hole is communicated with the screw cap pressure-releasing hole only by rotating the screw cap, so that the pressure in the system is released, the operation risk and the operation strength of operators are reduced, and the safe and stable production operation is ensured.
Further, the second sealing structure is an annular sealing gasket which is arranged on the front end face of the nut rear cover and surrounds the central axis, and the annular sealing gasket is used for being in corresponding sealing fit with the rear end of the screw rod eccentric pressure relief hole.
Further, an annular groove for installing an annular sealing gasket is formed in the front end face of the nut rear cover, and the annular groove is arranged around the central axis.
Further, the rear end of the nut outside is provided with a pipe joint, and the inside of the pipe joint is provided with a through hole communicated with the nut pressure relief hole.
Further, the device also comprises a pressure relief hose which is connected to the pipe joint.
Further, the first sealing structure is a sealing ring arranged on the screw rod plug and/or the hole wall of the screw cap jack.
Further, a screw flange is arranged in the middle of the double-head screw rod and is used for being matched with a wrenching tool to input torque.
Further, the screw flange is located between the plug connection threads and the nut connection threads.
Further, the screw mandrel flange is formed by a prismatic structure arranged in the middle of the double-head screw mandrel.
Further, the prism structure is a regular hexagonal prism structure.
Drawings
FIG. 1 is a schematic diagram of an embodiment of a pressure-relieving eccentric plug for a christmas tree of the present utility model;
FIG. 2 is a cross-sectional view of an embodiment of a pressure-relievable eccentric plug for a christmas tree of the present utility model with the nut and double-ended screw in a tightened condition;
FIG. 3 is a right side view of FIG. 2;
FIG. 4 is a cross-sectional view of an embodiment of a pressure-releasable eccentric plug for a christmas tree of the present utility model with the nut and double-ended screw in an unscrewed condition;
in the figure:
1. double-end screw rod; 11. eccentric pressure relief holes of the screw rod; 12. a screwed plug connecting thread; 13. a screw flange; 14. a nut connecting thread; 15. a screw rod plug; 2. a screw cap; 21. a nut pressure relief hole; 22. nut insertion holes; 23. a pipe joint; 24. an annular gasket; 3. a seal ring; 4. and a pressure relief hose.
Detailed Description
An embodiment of a pressure-relieving eccentric screw plug for a christmas tree comprises a double-end screw 1 and a screw cap 2, wherein the double-end screw 1 and the screw cap 2 are provided with coaxial central axes extending forwards and backwards, a screw rod eccentric pressure relief hole 11 extending forwards and backwards and penetrating through the double-end screw 1 is formed in the double-end screw 1, the screw rod eccentric pressure relief hole 11 deviates from the central axis in the radial direction, a screw plug connecting thread 12 is arranged at the front end part of the double-end screw 1, the screw plug connecting thread 12 is used for being in threaded connection with a corresponding port on the christmas tree, a screw cap connecting thread 14 is arranged at the rear end part of the double-end screw 1, the screw cap connecting thread 14 is used for being in threaded connection with the screw cap 2, the screw plug connecting thread 12 and the screw cap connecting thread 14 are both external threads, a screw rod flange 13 is arranged in the middle of the double-end screw 1, the screw rod flange 13 is positioned between the screw plug connecting thread 12 and the screw cap connecting thread 14, and the screw rod flange 13 is used for being matched with a wrenching tool to input torque, and the screw rod flange 13 is particularly an external hexagonal flange formed by a regular hexagonal prism structure can be matched with a wrench. The rear end of the double-end screw rod 1 is provided with a screw rod plug 15 positioned behind the screw cap connecting threads 14, the periphery of the screw rod plug 15 is provided with a sealing ring 3 safety groove and is provided with a sealing ring 3, and the screw rod plug 15 is used for being inserted into the screw cap 2 to realize the sealing between the double-end screw rod 1 and the screw cap 2.
The nut 2 is provided with a front opening, a rear cover and an inner hole extending from front to back, the hole wall of the inner hole is provided with an inner thread matched with the nut connecting thread 14, the rear of the inner thread in the inner hole is provided with a nut jack 22 for inserting the screw rod plug 15 of the double-end screw rod 1, the nut jack 22 and the screw rod plug 15 are sealed through a sealing ring 3, the sealing ring 3 in the embodiment is arranged on the screw rod plug 15, and the hole wall of the nut jack 22 can be arranged in other embodiments. The back cover of the nut 2 is provided with a front-back through nut pressure relief hole 21, the front end of the nut pressure relief hole 21 is communicated with the inner hole, the nut pressure relief hole 21 is positioned on the central axis, the front end face of the back cover is positioned behind the nut jack 22, the front end face of the back cover is provided with an annular groove which is provided with an annular sealing gasket 24 around the central axis, and the annular sealing gasket 24 is used for corresponding sealing fit with the rear end of the screw rod eccentric pressure relief hole 11. The rear end face of the rear cover of the screw cap 2 is provided with a pipe joint 23, the pipe joint 23 is used for connecting the pressure relief hose 4, and a through hole communicated with the screw cap pressure relief hole 21 is formed in the pipe joint 23.
When the pressure is not released, the screw cap 2 is in threaded connection with the double-end screw 1, the screw cap 2 is screwed on the double-end screw 1 to be in a screwing state, the front end face of the screw plug 15 is in front-back propping fit with the front end face of the rear cover of the screw cap 2, so that the combination of the screw cap 2 and the double-end screw 1 is firmer, and the rear end of the screw eccentric pressure release hole 11 is in reliable sealing fit with the rear cover of the screw cap 2 through the annular sealing gasket 24. During decompression, the screw cap 2 is unscrewed under the condition that the screw cap 2 is kept in threaded connection with the double-head screw 1, and a gap is formed between the rear end face of the screw plug 15 and the front end face of the rear cover of the screw cap 2 in the process of unscrewing the screw cap 2, and the gap can be communicated with the screw eccentric decompression hole 11 and the screw cap decompression hole 21, so that decompression is performed through the decompression hose 4. At the same time, the nut insertion hole 22 and the screw plug 15 still keep sealing through the sealing ring 3, so that leakage from the front opening of the nut 2 is prevented.
When the embodiment of the utility model is used, the christmas tree is installed on the corresponding port of the christmas tree by using the pressure-release eccentric plug, the plug connecting screw thread 12 of the double-head screw rod 1 is in threaded connection with the corresponding port of the christmas tree, and the nut 2 is in threaded connection with the double-head screw rod 1. The nut 2 is screwed on the double-end screw rod 1 in a normal state, and at the moment, the nut 2 and the double-end screw rod 1 are in a screwed state, the rear end face of the screw rod plug 15 is in front-back tight fit with the front end face of the nut rear cover, and the nut 2 and the double-end screw rod 1 are reliably sealed. When the screw plug is to be removed due to production requirement, as described above, the screw cap 2 is rotated to enable the screw cap 2 and the double-headed screw 1 to be in unscrewed state, a gap is formed between the rear end face of the screw plug 15 and the front end face of the screw cap rear cover, the screw eccentric pressure relief hole 11 is communicated with the screw cap pressure relief hole 21 through the gap, at this time, the eccentric channel in the screw plug is opened, the pressure is discharged through the pressure relief hose 4, and after the pressure is completely discharged, the whole screw plug is removed again, at this time, the system pressure is removed, so that the screw plug is safe and convenient.
In addition, in other embodiments of the present utility model, the sealing ring mounted on the screw rod plug in the above embodiments may be mounted on the hole wall of the nut jack, or on both the nut jack and the screw rod plug in other embodiments. In addition, the pipe joint on the nut can be replaced by directly inserting the pressure relief hose into the pressure relief hole of the nut, or directly relieving the pressure by using the pressure relief hole of the nut. In addition, the annular sealing gasket can be replaced by a whole circular gasket, and the annular sealing gasket can be adhered to the front end face of the nut back cover. The embodiments which are formed by simple alternatives or obvious variants listed above or similar thereto also belong to the embodiments which implement the technical solutions of the utility model.
Claims (10)
1. The decompression type eccentric plug for the christmas tree is characterized by comprising a double-end screw rod (1) and a screw cap (2), wherein the double-end screw rod (1) and the screw cap (2) are provided with coaxial central axes extending forwards and backwards, the front end part of the double-end screw rod (1) is provided with a plug connecting thread (12) for being in threaded connection with a corresponding port on the christmas tree, and the rear end part of the double-end screw rod (1) is provided with a screw cap connecting thread (14) for being in threaded connection with the screw cap (2); the screw cap (2) is provided with an inner hole extending from front to back and a rear cover; the double-end screw rod (1) is internally provided with screw rod eccentric pressure relief holes (11) which are parallel to the central axis and are spaced by a set distance, and the screw cap (2) is internally provided with screw cap pressure relief holes (21) which are positioned on the central axis; the rear end of the double-end screw rod (1) is provided with a screw rod plug (15) positioned behind the screw rod connecting screw thread (14), a screw rod jack (22) for inserting the screw rod plug (15) is arranged in an inner hole of the screw rod (2), a first sealing structure is arranged between the screw rod jack (22) and the screw rod plug (15), and the front end face of a rear cover of the screw rod (2) is provided with a second sealing structure for sealing the rear end of the screw rod eccentric pressure relief hole (11); the screw cap (2) is in threaded connection with the double-headed screw rod (1) and is provided with a screwing state and a unscrewing state, a screw rod eccentric pressure relief hole (11) is plugged by a rear cover of the screw cap in the screwing state, and a gap capable of communicating the screw rod eccentric pressure relief hole (11) with the screw rod pressure relief hole (21) is formed between the rear cover of the screw cap in the unscrewing state and the screw rod plug (15).
2. The pressure-releasing type eccentric plug for the christmas tree according to claim 1, wherein the second sealing structure is an annular sealing gasket (24) which is arranged around the central axis and is arranged on the front end face of the rear cover of the screw cap (2), and the annular sealing gasket (24) is used for correspondingly sealing and matching with the rear end of the screw rod eccentric pressure releasing hole (11).
3. The pressure-release eccentric plug for the christmas tree according to claim 2, characterized in that the front end face of the rear cover of the screw cap (2) is provided with an annular groove which is arranged around the central axis and is provided with an annular sealing gasket (24).
4. The pressure-releasing eccentric plug for the christmas tree according to claim 1, wherein the rear end of the outer part of the screw cap (2) is provided with a pipe joint (23), and a through hole communicated with the screw cap pressure releasing hole (21) is arranged in the pipe joint (23).
5. The pressure-relieving eccentric plug for the christmas tree according to claim 4, further comprising a pressure-relieving hose (4), wherein the pressure-relieving hose (4) is connected to the pipe joint (23).
6. The pressure-release eccentric plug for christmas tree according to claim 1, characterized in that the first sealing structure is a sealing ring (3) mounted on the screw plug (15) and/or on the wall of the nut socket (22).
7. The pressure-release eccentric plug for the christmas tree according to any one of claims 1-6, characterized in that a screw flange (13) is arranged in the middle of the double-headed screw (1), and the screw flange (13) is used for being matched with a wrenching tool to input torque.
8. The pressure-releasing eccentric plug for christmas tree according to claim 7, characterized in that the screw flange (13) is located between the plug connection thread (12) and the nut connection thread (14).
9. The pressure-release eccentric plug for a christmas tree according to claim 8, characterized in that the screw flange (13) is formed by a prismatic structure arranged in the middle of the double-headed screw (1).
10. The pressure-releasing eccentric plug for christmas tree of claim 9, wherein the prismatic structure is a regular hexagonal prismatic structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320210438.7U CN219241872U (en) | 2023-02-14 | 2023-02-14 | Pressure-release eccentric plug for christmas tree |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320210438.7U CN219241872U (en) | 2023-02-14 | 2023-02-14 | Pressure-release eccentric plug for christmas tree |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219241872U true CN219241872U (en) | 2023-06-23 |
Family
ID=86806092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320210438.7U Active CN219241872U (en) | 2023-02-14 | 2023-02-14 | Pressure-release eccentric plug for christmas tree |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219241872U (en) |
-
2023
- 2023-02-14 CN CN202320210438.7U patent/CN219241872U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |