CN220621819U - Safety device for replacing wellhead valve under pressure in oil field - Google Patents
Safety device for replacing wellhead valve under pressure in oil field Download PDFInfo
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- CN220621819U CN220621819U CN202322153524.1U CN202322153524U CN220621819U CN 220621819 U CN220621819 U CN 220621819U CN 202322153524 U CN202322153524 U CN 202322153524U CN 220621819 U CN220621819 U CN 220621819U
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- clamp
- pull rod
- horizontal pull
- oilfield wellhead
- valve
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- 239000007788 liquid Substances 0.000 abstract description 4
- 238000007789 sealing Methods 0.000 description 7
- 238000010276 construction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a safety device for replacing an oilfield wellhead valve under pressure, which comprises an oilfield wellhead device, wherein the interior of the oilfield wellhead device is detachably connected with a plugging device, the outer side of the oilfield wellhead device is connected with a valve, and the outer side of the oilfield wellhead device is connected with a safety auxiliary device; the safety auxiliary device comprises an upper clamp and a lower clamp, and the upper clamp and the lower clamp are respectively detachably connected with the outer sides of an upper flange and a lower flange of a wellhead four-way joint in the oilfield wellhead device. The utility model belongs to the technical field of valve replacement under pressure, and particularly provides an oilfield wellhead valve replacement safety device under pressure, which is used for limiting a plugging device when a valve is replaced and preventing the plugging device from slipping and ejecting under high pressure to cause out-of-control high-pressure liquid blowout and even hurt constructors through the use of an upper clamp, a lower clamp, an upper horizontal pull rod, a lower horizontal pull rod, a front locking plate, a rear locking plate, a threaded rod and a push rod.
Description
Technical Field
The utility model belongs to the technical field of valve under-pressure replacement, and particularly relates to a safety device for oil field wellhead valve under-pressure replacement.
Background
Petroleum extraction wellheads, water injection wellheads, and manifolds are important basic equipment in modern petroleum extraction engineering, and high-pressure valves are the main components on such equipment.
Through retrieval, application number CN103742710A provides a valve replacing device under pressure, the utility model realizes the sealing, seat sealing, unsealing and internal pressure balance of tools, and the complex functions are continuously and automatically completed in one stroke, so that the operation is simpler and more reliable, the uncertainty of manual operation is reduced, the safety of the construction process is ensured, no pollution is caused to the environment, and the construction cost is greatly reduced.
In the process of replacing the wellhead valve in the oil field under pressure, after the plugging device is seated, the plugging device is locked at the four-way neck by means of self tensioning force in the time period of valve repair and valve detachment and new valve installation in place, and the outer end of the plugging device is free of any protective measure, and the plugging device can be ejected under high pressure once slipping, so that high-pressure liquid blowout is out of control and serious accidents such as constructors are even hurt. In order to ensure that the plugging device is always in a controlled state in the construction process and ensure the safety of the valve replacement process under pressure, simple and effective safety protection measures are specially designed.
Disclosure of Invention
Aiming at the situation, in order to overcome the defects of the prior art, the utility model provides the safety device for replacing the oilfield wellhead valve under pressure, which is used for limiting the plugging device when replacing the valve and preventing the plugging device from slipping and ejecting under high pressure, so that high-pressure liquid blowout is out of control and even constructors are injured.
The technical scheme adopted by the utility model is as follows: the safety device for replacing the oilfield wellhead valve under pressure comprises an oilfield wellhead device, wherein the inside of the oilfield wellhead device is detachably connected with a plugging device, the outside of the oilfield wellhead device is connected with a valve, and the outside of the oilfield wellhead device is connected with a safety auxiliary device;
the safety auxiliary device comprises an upper clamp and a lower clamp, the upper clamp and the lower clamp are respectively detachably connected to the outer sides of an upper flange and a lower flange of a wellhead four-way joint in an oilfield wellhead device, the outer sides of the upper clamp and the lower clamp are respectively connected with an upper horizontal pull rod and a lower horizontal pull rod, a front locking plate and a rear locking plate are sequentially connected between the upper horizontal pull rod and the lower horizontal pull rod from left to right, an internal threaded hole is formed in the middle connection of the rear locking plate, a threaded rod is arranged in the internal threaded connection of the internal threaded hole, and a push rod is rotatably connected to the left end of the threaded rod.
Preferably, the front locking plate comprises a first front locking piece and a second front locking piece, the first front locking piece and the second front locking piece are connected and arranged on the outer sides of the upper horizontal pull rod and the lower horizontal pull rod through a first bolt and a first nut, and the ejector rod is detachably connected and arranged between the first front locking piece and the second front locking piece.
Preferably, the left sides of the upper horizontal pull rod and the lower horizontal pull rod are respectively sleeved with a first external thread, the outer sides of the two first external threads are respectively connected with a first adjusting nut in a threaded manner, and the left sides of the two first adjusting nuts are respectively connected with a fixing ring.
Preferably, the right-hand member outside of going up horizontal pull rod and lower horizontal pull rod all is connected and is equipped with the second external screw thread, the both ends of back locking plate are overlapped respectively and are located two the outside of second external screw thread, and two the equal thread bush in the outside of second external screw thread is equipped with second adjusting nut.
Preferably, the upper clamp comprises a first upper arc clamp and a second upper arc clamp, the lower clamp comprises a first lower arc clamp and a second lower arc clamp, and the first upper arc clamp and the second upper arc clamp and the first lower arc clamp and the second lower arc clamp are connected through clamp bolts and clamp nuts.
Preferably, the upper horizontal pull rod is connected to one side of the first upper arc-shaped clamp, and the lower horizontal pull rod is connected to one side of the first lower arc-shaped clamp.
Further, the installation steps of the safety auxiliary device are as follows:
step one: the plugging device is sent into a preset position by a special hydraulic cylinder, then the seat is sealed and the good sealing is confirmed, and then the hydraulic cylinder is dismantled (in the prior art, refer to application number CN 103742710A);
step two: the first upper arc-shaped clamp and the second upper arc-shaped clamp are fixed on the outer side of an upper flange of the wellhead four-way joint through clamp bolts and clamp nuts;
the first lower arc-shaped clamp and the second lower arc-shaped clamp are fixed on the outer side of a lower flange of the wellhead four-way joint through clamp bolts and clamp nuts;
sleeving the rear locking plate on the outer sides of the upper horizontal pull rod and the lower horizontal pull rod, rotating the second adjusting nut, and limiting the rear locking plate;
rotating the threaded rod to enable the front end of the ejector rod to be attached to the tail end of the seat sealing tool, and limiting the plugging device;
step three: opening a clamp connected with the four-way valve and backing the valve along the axial direction;
fixing the first front locking piece and the second front locking piece on the outer sides of the upper horizontal pull rod and the lower horizontal pull rod through a first bolt and a first nut, and fixing the ejector rod;
step four: taking down the second adjusting nut, rotating the threaded rod, taking out the rear locking plate, and then taking out the valve;
step five: and (3) installing a new valve, installing a rear locking plate, screwing in a second adjusting nut, removing the front locking plate, connecting the new valve with the four-way clamp, rotating a threaded rod to withdraw from the ejector rod, closing the valve, and removing the plugging device.
The beneficial effects obtained by the utility model by adopting the structure are as follows: according to the oil field wellhead valve under-pressure replacement safety device, the upper clamp, the lower clamp, the upper horizontal pull rod, the lower horizontal pull rod, the front locking plate, the rear locking plate, the threaded rod and the ejector rod are additionally arranged, the ejector rod limits the plugging device when the valve is replaced, the plugging device is prevented from being ejected out under high pressure, the high-pressure liquid blowout is prevented from being out of control, constructors are injured even, and the safety performance of the safety valve replacement is improved.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a safety auxiliary device in a safety device for replacing an oilfield wellhead valve under pressure in the scheme;
FIG. 2 is a schematic structural view of the safety device for replacing the wellhead valve under pressure in the oil field according to the scheme;
FIG. 3 is a schematic structural diagram of an oil Tian Jingkou device in the safety device for replacing the wellhead valve of the oil field under pressure in the scheme;
FIG. 4 is a second step of installing a safety auxiliary device in the oil field wellhead valve pressurized replacement safety device according to the present disclosure;
FIG. 5 is a step three of installing a safety auxiliary device in the oil field wellhead valve pressurized replacement safety device according to the present disclosure;
fig. 6 is a step four of installing a safety auxiliary device in the oil field wellhead valve pressurized replacement safety device according to the scheme.
Wherein, 1, an oilfield wellhead device, 2, a plugging device, 3, a valve, 4, an upper clamp, 5, a lower clamp, 6, an upper horizontal pull rod, 7, a lower horizontal pull rod, 8, a front locking plate, 9, a rear locking plate, 10, a threaded rod, 11, a push rod, 12, a first front locking piece, 13 and a second front locking piece, 14, first bolts, 15, first nuts, 16, first adjusting nuts, 17, fixing rings, 18, second adjusting nuts, 19, first upper arc-shaped hoops, 20, second upper arc-shaped hoops, 21, first lower arc-shaped hoops, 22, second lower arc-shaped hoops, 23, hoop bolts, 24 and hoop nuts.
The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model.
Detailed Description
As shown in fig. 1-6, the safety device for replacing the oilfield wellhead valve under pressure comprises an oilfield wellhead device 1, a plugging device 2 and a safety auxiliary device, wherein the plugging device 2 is detachably connected and arranged in the oilfield wellhead device 1, the valve 3 is connected and arranged on the outer side of the oilfield wellhead device 1, and the safety auxiliary device is detachably connected and arranged on the outer side of the oilfield wellhead device 1.
As shown in fig. 1, the safety auxiliary device comprises an upper clamp 4, a lower clamp 5, an upper horizontal pull rod 6, a lower horizontal pull rod 7, a front locking plate 8, a rear locking plate 9, a threaded rod 10 and a push rod 11, wherein the upper clamp 4 and the lower clamp 5 are respectively detachably connected with the outer sides of an upper flange and a lower flange of a wellhead four-way joint in the oilfield wellhead device 1, the upper horizontal pull rod 6 and the lower horizontal pull rod 7 are respectively connected with the outer sides of the upper clamp 4 and the lower clamp 5, the front locking plate 8 and the rear locking plate 9 are sequentially connected from left to right and arranged between the upper horizontal pull rod 6 and the lower horizontal pull rod 7, the middle part of the rear locking plate 9 is connected with an internal threaded hole, the threaded rod 10 is sleeved in the internal threaded hole, and the push rod 11 is connected with the left end of the threaded rod 10.
As shown in fig. 1, the front locking plate 8 includes a first front locking member 12 and a second front locking member 13, the first front locking member 12 and the second front locking member 13 are connected and disposed on the outer sides of the upper horizontal pull rod 6 and the lower horizontal pull rod 7 through a first bolt 14 and a first nut 15, and the ejector rod 11 is detachably connected and disposed between the first front locking member 12 and the second front locking member 13.
As shown in fig. 1, the upper clamp 4 comprises a first upper arc clamp 19 and a second upper arc clamp 20, the lower clamp 5 comprises a first lower arc clamp 21 and a second lower arc clamp 22, the first upper arc clamp 19 and the second upper arc clamp 20, the first lower arc clamp 21 and the second lower arc clamp 22 are connected by clamp bolts 23 and nuts 24, the upper horizontal pull rod 6 is connected to one side of the first upper arc clamp 19, and the lower horizontal pull rod 7 is connected to one side of the first lower arc clamp 21
The left sides of the upper horizontal pull rod 6 and the lower horizontal pull rod 7 are respectively sleeved with a first external thread, the outer sides of the two first external threads are respectively connected with a first adjusting nut 16 in a threaded manner, and the left sides of the two first adjusting nuts 16 are respectively connected with a fixing ring 17.
The right-end outsides of the upper horizontal pull rod 6 and the lower horizontal pull rod 7 are respectively connected with second external threads, two ends of the rear locking plate 9 are respectively sleeved on the outsides of the second external threads, and the outsides of the second external threads are respectively sleeved with a second adjusting nut 18.
When the plugging device is specifically used, firstly, the plugging device 2 is sent to a preset position by a special hydraulic cylinder, then the plugging device is subjected to seat sealing, the seat sealing and the plugging are confirmed to be good, and then the hydraulic cylinder is dismantled (in the prior art, refer to application number CN 103742710A); secondly, fixing a first upper arc-shaped clamp 19 and a second upper arc-shaped clamp 20 on the outer side of an upper flange of a wellhead four-way joint through a clamp bolt 23 and a clamp nut 24, fixing a first lower arc-shaped clamp 21 and a second lower arc-shaped clamp 22 on the outer side of a lower flange of the wellhead four-way joint through the clamp bolt 23 and the clamp nut 24, sleeving a rear locking plate 9 on the outer sides of an upper horizontal pull rod 6 and a lower horizontal pull rod 7, rotating a second adjusting nut 18, limiting the rear locking plate 9, rotating a threaded rod 10, enabling the front end of a push rod 11 to be attached to the tail end of a seat sealing tool, and limiting the plugging device 2; then, opening a clamp for connecting the valve and the four-way joint, backing the valve along the axial direction, fixing the first front locking piece 12 and the second front locking piece 13 on the outer sides of the upper horizontal pull rod 6 and the lower horizontal pull rod 7 through the first bolt 14 and the first nut 15, and fixing the ejector rod 11; finally, the second adjusting nut 18 is removed, the threaded rod 10 is rotated, the rear locking plate 9 is taken out, and then the valve is taken out; the valve is taken out;
installing a new valve, installing a rear locking plate 9, screwing in a second adjusting nut 18, dismantling the front locking plate 8, connecting the new valve with a four-way clamp, rotating a threaded rod 10 to withdraw an ejector rod 11, closing the valve, and dismantling the plugging device 2; and finishing the installation of the new valve.
The utility model and its embodiments have been described above with no limitation, and the actual construction is not limited to the embodiments of the utility model as shown in the drawings. In summary, if one of ordinary skill in the art is informed by this disclosure, a structural manner and an embodiment similar to the technical solution should not be creatively devised without departing from the gist of the present utility model.
Claims (6)
1. The safety device for replacing the oilfield wellhead valve under pressure comprises an oilfield wellhead device and is characterized in that a plugging device is detachably connected in the oilfield wellhead device, a valve is connected to the outer side of the oilfield wellhead device, and a safety auxiliary device is connected to the outer side of the oilfield wellhead device;
the safety auxiliary device comprises an upper clamp and a lower clamp, the upper clamp and the lower clamp are respectively detachably connected to the outer sides of an upper flange and a lower flange of a wellhead four-way joint in an oilfield wellhead device, the outer sides of the upper clamp and the lower clamp are respectively connected with an upper horizontal pull rod and a lower horizontal pull rod, a front locking plate and a rear locking plate are sequentially connected between the upper horizontal pull rod and the lower horizontal pull rod from left to right, an internal threaded hole is formed in the middle connection of the rear locking plate, a threaded rod is arranged in the internal threaded connection of the internal threaded hole, and a push rod is rotatably connected to the left end of the threaded rod.
2. The oilfield wellhead valve pressurized replacement safety device of claim 1, wherein: the front locking plate comprises a first front locking piece and a second front locking piece, the first front locking piece and the second front locking piece are connected and arranged on the outer sides of the upper horizontal pull rod and the lower horizontal pull rod through a first bolt and a first nut, and the ejector rod is detachably connected and arranged between the first front locking piece and the second front locking piece.
3. The oilfield wellhead valve pressurized replacement safety device of claim 1, wherein: the left sides of the upper horizontal pull rod and the lower horizontal pull rod are respectively sleeved with a first external thread, the outer sides of the two first external threads are respectively connected with a first adjusting nut in a threaded mode, and the left sides of the two first adjusting nuts are respectively connected with a fixing ring.
4. The oilfield wellhead valve pressurized replacement safety device of claim 1, wherein: the right-hand member outside of going up horizontal pull rod and lower horizontal pull rod is all connected and is equipped with the second external screw thread, the both ends of back locking plate are overlapped respectively and are located two the outside of second external screw thread, and two the outside of second external screw thread is equal the thread bush and is equipped with second adjusting nut.
5. The oilfield wellhead valve pressurized replacement safety device of claim 1, wherein: go up the clamp and go up the arc clamp including first arc clamp and second, lower clamp includes arc clamp and second down, first arc clamp and second go up between the arc clamp, first arc clamp and second down between the arc clamp all through clamp bolt and clamp nut connection down.
6. The oilfield wellhead valve pressurized replacement safety device of claim 1, wherein: the upper horizontal pull rod is connected to one side of the first upper arc-shaped clamp, and the lower horizontal pull rod is connected to one side of the first lower arc-shaped clamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322153524.1U CN220621819U (en) | 2023-08-11 | 2023-08-11 | Safety device for replacing wellhead valve under pressure in oil field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322153524.1U CN220621819U (en) | 2023-08-11 | 2023-08-11 | Safety device for replacing wellhead valve under pressure in oil field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220621819U true CN220621819U (en) | 2024-03-19 |
Family
ID=90225854
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322153524.1U Active CN220621819U (en) | 2023-08-11 | 2023-08-11 | Safety device for replacing wellhead valve under pressure in oil field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220621819U (en) |
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2023
- 2023-08-11 CN CN202322153524.1U patent/CN220621819U/en active Active
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