CN214886967U - Ultrahigh pressure composite function coiled tubing blowout preventer - Google Patents
Ultrahigh pressure composite function coiled tubing blowout preventer Download PDFInfo
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- CN214886967U CN214886967U CN202121340695.XU CN202121340695U CN214886967U CN 214886967 U CN214886967 U CN 214886967U CN 202121340695 U CN202121340695 U CN 202121340695U CN 214886967 U CN214886967 U CN 214886967U
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Abstract
The utility model relates to the field of oil gas exploitation coiled tubing operation, and discloses a blowout preventer of a coiled tubing with ultrahigh pressure composite function, which comprises a shell; a shearing full-sealing flashboard assembly and a slip semi-sealing flashboard assembly are symmetrically arranged in the shell from top to bottom; the shearing full-sealing flashboard assembly is connected with a shearing hydraulic cylinder assembly; the slip semi-seal flashboard assembly is connected with a slip hydraulic cylinder assembly; the shearing hydraulic cylinder assembly comprises a shearing oil cylinder and a hand wheel; one end of the shearing oil cylinder is connected with the shearing full-sealing flashboard assembly, and the other end of the shearing oil cylinder is connected with the serial oil cylinder; the hand wheel is connected with the serial oil cylinder; the slip semi-closed gate plate assembly comprises a left slip gate plate body and a right slip gate plate body; the upper end of the slip flashboard body is provided with a top sealing rubber core; a semi-seal front seal and a slip are arranged in the slip flashboard body; the slips are positioned above the front seal. The utility model discloses can realize cutting coiled tubing and totally sealing the well head fast under the superelevation pressure, can hang oil pipe and ring seal well head fast simultaneously under the special operation condition.
Description
Technical Field
The utility model relates to a coiled tubing preventer of oil gas exploitation coiled tubing operation field, in particular to superhigh pressure complex function coiled tubing preventer.
Background
The coiled tubing technology is high in efficiency, wide in application range, centralized in equipment operation, safe and reliable, can adapt to various environments such as mountainous regions, plateaus, deserts and oceans, and is widely applied to the fields of well repair, well drilling, well completion, well logging, yield increase, fracturing and the like of conventional oil and gas fields and unconventional oil and gas fields. The method has great potential particularly in the aspect of improving the development of unconventional oil and gas such as compact oil and gas, shale oil and gas, coal bed gas and the like, has outstanding economic and efficient advantages, and is very accordant with national strategies of the national unconventional oil and gas large-scale development. Coiled tubing technology has been extensively validated in north american developed oil and gas areas, leading to the myth of low cost, high yield of north american shale gas. The coiled tubing blowout preventer as a well control device is an important component of coiled tubing operation, and mainly has the functions of sealing an annular space between a coiled tubing and a well head, suspending the coiled tubing by matching with a well head tubing hanger, preventing the coiled tubing from being flushed out by high pressure in a well, and shearing the coiled tubing when the coiled tubing is stuck or used as a production string. The conventional coiled tubing blowout preventer is mainly a four-ram blowout preventer, the sealing pressure is below 70MPa, a full-seal ram, a shear ram, a slip ram and a half-seal ram are respectively installed from top to bottom, and each layer of ram has a single function.
With the wide application of coiled tubing operation in the exploitation of ultrahigh-pressure oil and gas fields, new requirements are provided for coiled tubing well control equipment, ultrahigh-pressure sealing needs to be met, a large-diameter coiled tubing or a multilayer oil tube can be cut off, the requirements on installation space and safety operation efficiency of an oil field site need to be met, the height and the weight of a coiled tubing blowout preventer need to be reduced, the operation steps and time of the blowout preventer under high pressure are reduced, the hanging, sealing and shearing functions are quickly realized, the safety requirements of the site are guaranteed, and the use efficiency is improved. Therefore, a special structural design is needed, and the ultrahigh pressure composite function coiled tubing blowout preventer which can rapidly cut a coiled tubing and completely seal a wellhead under ultrahigh pressure and can rapidly hang the tubing and annularly seal the wellhead under the special operation condition is developed.
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem provide a superhigh pressure complex function coiled tubing preventer, can realize cutting coiled tubing and totally seal the well head fast under the superhigh pressure, can hang oil pipe and ring seal the well head fast simultaneously under the special operation condition.
The utility model provides a technical scheme that its technical problem adopted is: an ultrahigh pressure composite function coiled tubing blowout preventer comprises a shell; a shearing full-sealing flashboard assembly and a slip semi-sealing flashboard assembly are symmetrically arranged in the shell from top to bottom; the shearing fully-closed gate plate assembly is connected with a shearing hydraulic cylinder assembly; the slip semi-closed flashboard assembly is connected with a slip hydraulic cylinder assembly; the shearing hydraulic cylinder assembly comprises a shearing oil cylinder and a hand wheel; one end of the shearing oil cylinder is connected with the shearing full-sealing flashboard assembly, and the other end of the shearing oil cylinder is connected with the serial oil cylinder; the hand wheel is connected with the serial oil cylinder; the slip semi-closed gate plate assembly comprises a left slip gate plate body and a right slip gate plate body; the upper end of the slip flashboard body is provided with a top sealing rubber core; a semi-seal front seal and a slip are arranged in the slip flashboard body; the slips are located above the front seal half seal.
Further, the method comprises the following steps: the slips are made of 20CrMnTi or 8620 materials, and the surfaces of the slips are subjected to gas carburization and oxidation treatment; the slips are provided with triangular threads.
Further, the method comprises the following steps: a shearing cylinder main piston of the shearing oil cylinder is connected with a serial cylinder piston of the serial oil cylinder; the hand wheel is connected with a serial cylinder piston of the serial oil cylinder through a connecting stud.
Further, the method comprises the following steps: and a balance valve assembly is also arranged in the shell.
Further, the method comprises the following steps: the shearing full-sealing flashboard assembly comprises a left shearing rubber core assembly and a right shearing rubber core assembly; the two shearing rubber core assemblies are respectively provided with an upper shearing knife and a lower shearing knife; and the top of each shearing rubber core assembly is provided with a shearing rubber core.
Further, the method comprises the following steps: sealing rubber is arranged on the upper shearing knife and the lower shearing knife; the sealing rubber is vulcanized with the upper shearing knife and the lower shearing knife into a whole; the cutting edges of the upper shearing knife and the lower shearing knife are V-shaped.
The utility model has the advantages that: a series oil cylinder is added to a shearing hydraulic cylinder assembly to enhance shearing force, a shearing knife is driven by the shearing hydraulic cylinder to firstly and quickly shear the continuous oil pipe, and then the continuous oil pipe is in contact extrusion with a rubber core, so that ultrahigh pressure sealing of a well mouth is realized. The slips are designed on the upper part of the seal before half sealing, are not contacted with fluid in a well, and have better adaptability to a wellhead under the working condition of hydrogen sulfide. The semi-sealing front seal is designed at the lower part of the slip, and the compression amount of the rubber core and the depth of the slip clamped into the oil pipe are in a balance relation, so that the slip can be ensured to be smoothly clamped into the oil pipe, and the ultrahigh pressure seal can be realized.
Drawings
FIG. 1 is a schematic structural view of an ultrahigh pressure complex function coiled tubing blowout preventer;
FIG. 2 is a schematic top view of a slip segment assembly;
FIG. 3 is a schematic cross-sectional view of a slip segment assembly;
FIG. 4 is a schematic structural view of a shearing hydraulic cylinder assembly;
FIG. 5 is a schematic view of a multiple shear blind ram assembly;
FIG. 6 is a cross-sectional schematic view of a shear blind ram assembly.
Labeled as: 1. a housing; 2. shearing a hydraulic cylinder assembly; 21. shearing an oil cylinder; 211. a shear cylinder master piston; 22. oil cylinders are connected in series; 221. a tandem cylinder piston; 23. a hand wheel; 231. connecting a stud; 3. shearing the full-sealing gate plate assembly; 31. shearing the rubber core assembly; 32. an upper shearing knife; 33. a lower shearing knife; 34. shearing the rubber ejection core; 4. a slip hydraulic cylinder assembly; 5. a slip semi-closed gate plate assembly; 51. a slip ram body; 52. sealing the rubber core; 53. sealing before half sealing; 54. slips; 55. a guide angle; 6. a balanced valve assembly.
Detailed Description
In order to deepen the understanding of the present invention, the present invention will be described in further detail with reference to the accompanying drawings and embodiments, which are only used for explaining the present invention and are not limited to the protection scope of the present invention.
Examples
As shown in fig. 1 to 6, an ultrahigh pressure complex function coiled tubing blowout preventer includes a housing 1; a shearing full-seal flashboard assembly 3 and a slip semi-seal flashboard assembly 5 are symmetrically arranged in the shell 1 from top to bottom; the shearing full-sealing flashboard assembly 3 is connected with a shearing hydraulic cylinder assembly 2; the slip semi-closed flashboard assembly 5 is connected with a slip hydraulic cylinder assembly 4; the shearing hydraulic cylinder assembly 2 comprises a shearing oil cylinder 21 and a hand wheel 23; one end of the shearing oil cylinder 21 is connected with the shearing full-sealing flashboard assembly 3, and the other end of the shearing oil cylinder is connected with the serial oil cylinder 22; the hand wheel 23 is connected with the serial oil cylinder 22; the slip semi-closed gate plate assembly 5 comprises a left slip gate plate body 51 and a right slip gate plate body 51; the upper end of the slip flashboard body 51 is provided with a top sealing rubber core 52; a semi-sealed front seal 53 and slips 54 are arranged in the slip flashboard body 51; the slips 54 are positioned above the front seal half 53.
On the basis, the slips 54 are made of 20CrMnTi or 8620 materials, and the surfaces of the slips are subjected to gas carburization and oxidation treatment; the slips 54 are provided with triangular threads.
On the basis, the shearing cylinder master piston 211 of the shearing cylinder 21 is connected with the tandem cylinder piston 221 of the tandem cylinder 22; the hand wheel 23 is connected with the tandem cylinder piston 221 of the tandem cylinder 22 through a connecting stud 231.
On the basis, a balance valve assembly 6 is further arranged in the shell 1.
On the basis, the shearing fully-closed gate plate assembly 3 comprises a left shearing rubber core assembly 31 and a right shearing rubber core assembly 31; the two shearing rubber core assemblies 31 are respectively provided with an upper shearing knife 32 and a lower shearing knife 33; the top of each of the two shearing rubber core assemblies 31 is provided with a shearing top rubber core 34.
On the basis, the upper shearing knife 32 and the lower shearing knife 33 are both provided with sealing rubber; the sealing rubber is vulcanized with the upper shearing knife 32 and the lower shearing knife 33 into a whole; the knife edges of the upper shearing knife 32 and the lower shearing knife 33 are V-shaped. The section of the coiled tubing after being sheared by the double V-shaped knife openings is rhombic and has the largest flow passage hole, the coiled tubing at the lower end can be used as a production tubing string, the upper end can be drawn out from the rubber sleeve of the blowout prevention box, and the pipe opening does not need to be additionally repaired by a tool.
Go up to cut sword 31 and lower cutter 33 and pass through the screw mounting on shearing gluey core 31 assembly, adopt split type design for shearing gluey core assembly 31 optional material that satisfies hydrogen sulfide operating mode requirement, and only need change alone when cutting the sword and damaging, needn't change the assembly, significantly reduced use cost.
The utility model discloses superhigh pressure combined function coiled tubing preventer installs on the well head, after going into the required position in the well under the coiled tubing, prevent that coiled tubing from dashing out or need special operation to hang when sealing coiled tubing, slips pneumatic cylinder assembly 4 promotes half flashboard assembly 5 of slips and removes to the well head center, seal 53 holds coiled tubing earlier before half sealing when half flashboard assembly 5 of slips is closed, after half preceding seal 53 further extrudees back oil pipe, two lamellas slips 54 about hang coiled tubing, the compression is pasted tightly between top seal rubber core 52 and the casing 1 simultaneously, form initial seal. When pressure exists in the well, the well pressure pushes the semi-seal front seal 53 to further extrude and deform, and meanwhile, the well pressure can push the flashboard to float upwards from the lower part, so that the top seal rubber core 52 is attached to the shell 1 to form well pressure sealing assistance, and the best sealing function is achieved. When the coiled tubing is stuck or used as a production string, the shearing hydraulic cylinder assembly 2 pushes the shearing all-sealed gate plate assembly 3 to move towards the center of a well mouth, the upper shearing knife and the lower shearing knife approach towards the center of the well mouth when the shearing all-sealed gate plate assembly 3 is closed, the coiled tubing is firstly sheared, then the upper shearing knife 32 is in contact with sealing rubber of the lower shearing knife 33, further sealing rubber is extruded to contact the upper shearing knife 32, and meanwhile, the shearing top rubber core 34 is compressed and attached to the shell 1 to form initial sealing.
When the flashboard needs to be closed for a long time and the hydraulic control pressure is removed, the locking screw rod can be rotated clockwise through the hand wheel 23 at the rear end of the hydraulic cylinder to realize quick locking. When the ram of the blowout preventer needs to be opened, the locking screw rod needs to be rotated anticlockwise to realize quick release, then the valve core of the balance valve assembly 6 is opened to enable the pressure of the upper cavity and the lower cavity of the ram to be balanced, and finally the slip semi-closed ram assembly 5 is pushed to be far away from the center of a wellhead through the slip hydraulic cylinder assembly 4, so that the ram is opened.
The slips are made of 20CrMnTi or 8620 materials, high strength and hardness are obtained through gas carburizing treatment, good wear resistance is achieved, meanwhile, the slips are subjected to oxidation treatment, and the corrosion resistance of the slips is guaranteed. The upper shearing knife and the lower shearing knife are made of high-strength alloy steel, the knife edge is subjected to high-frequency quenching treatment, the surface strength is improved, the knife edge adopts a double-V-shaped knife edge design, the knife edge is in four-surface contact with the pipe body during shearing, larger shearing stress can be generated, and meanwhile, the double-V-shaped knife edge can ensure that the rear section of the shearing coiled tubing is in a diamond shape, so that the shearing coiled tubing has the largest runner hole, and the shearing coiled tubing can be more easily drawn out from the blowout prevention box rubber cylinder, so that the orifice does not need to be additionally repaired through tools. Shear sword and sealing rubber vulcanization become an organic whole, and this structural design makes the size at sealed position can obtain more accurate control, and rubber receives to possess more extrusion after the extrusion and glues the volume, can realize that the superhigh pressure is sealed.
The above-mentioned embodiments should not limit the present invention in any way, and all the technical solutions obtained by adopting equivalent replacement or equivalent conversion fall within the protection scope of the present invention.
Claims (6)
1. An ultrahigh pressure composite function coiled tubing blowout preventer comprises a shell (1); a shearing full-seal flashboard assembly (3) and a slip semi-seal flashboard assembly (5) are symmetrically arranged in the shell (1) from top to bottom; the shearing fully-closed gate plate assembly (3) is connected with a shearing hydraulic cylinder assembly (2); the slip semi-closed flashboard assembly (5) is connected with a slip hydraulic cylinder assembly (4); the method is characterized in that: the shearing hydraulic cylinder assembly (2) comprises a shearing oil cylinder (21) and a hand wheel (23); one end of the shearing oil cylinder (21) is connected with the shearing full-sealing flashboard assembly (3), and the other end of the shearing oil cylinder is connected with a series oil cylinder (22); the hand wheel (23) is connected with the serial oil cylinder (22); the slip semi-closed gate plate assembly (5) comprises a left slip gate plate body and a right slip gate plate body (51); the upper end of the slip flashboard body (51) is provided with a top sealing rubber core (52); a semi-sealed front seal (53) and slips (54) are arranged in the slip flashboard body (51); the slips (54) are positioned above the front seal half (53).
2. The ultrahigh pressure complex function coiled tubing blowout preventer of claim 1, wherein: the slips (54) are made of 20CrMnTi or 8620 materials, and the surfaces of the slips are subjected to gas carburization and oxidation treatment; triangular threads are arranged on the slips (54).
3. The ultrahigh pressure complex function coiled tubing blowout preventer of claim 1, wherein: a shearing cylinder main piston (211) of the shearing oil cylinder (21) is connected with a serial cylinder piston (221) of a serial oil cylinder (22); the hand wheel (23) is connected with a tandem cylinder piston (221) of the tandem oil cylinder (22) through a connecting stud (231).
4. The ultrahigh pressure complex function coiled tubing blowout preventer of claim 1, wherein: and a balance valve assembly (6) is also arranged in the shell (1).
5. The ultrahigh pressure complex function coiled tubing blowout preventer of claim 1, wherein: the shearing fully-closed gate plate assembly (3) comprises a left shearing rubber core assembly and a right shearing rubber core assembly (31); the two shearing rubber core assemblies (31) are respectively provided with an upper shearing knife (32) and a lower shearing knife (33); the tops of the two shearing rubber core assemblies (31) are provided with shearing top rubber cores (34).
6. The ultrahigh pressure complex function coiled tubing blowout preventer of claim 5, wherein: sealing rubber is arranged on the upper shearing knife (32) and the lower shearing knife (33); the sealing rubber is vulcanized with the upper shearing knife (32) and the lower shearing knife (33) into a whole; the knife edges of the upper shearing knife (32) and the lower shearing knife (33) are V-shaped.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121340695.XU CN214886967U (en) | 2021-06-16 | 2021-06-16 | Ultrahigh pressure composite function coiled tubing blowout preventer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121340695.XU CN214886967U (en) | 2021-06-16 | 2021-06-16 | Ultrahigh pressure composite function coiled tubing blowout preventer |
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| CN214886967U true CN214886967U (en) | 2021-11-26 |
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| CN202121340695.XU Active CN214886967U (en) | 2021-06-16 | 2021-06-16 | Ultrahigh pressure composite function coiled tubing blowout preventer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114876401A (en) * | 2022-06-20 | 2022-08-09 | 易初机械装备有限公司 | Coiled tubing blowout preventer and use method thereof |
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2021
- 2021-06-16 CN CN202121340695.XU patent/CN214886967U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114876401A (en) * | 2022-06-20 | 2022-08-09 | 易初机械装备有限公司 | Coiled tubing blowout preventer and use method thereof |
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230505 Address after: No. 16, Xihenggang Street, Yangchenghu Town, Xiangcheng District, Suzhou City, Jiangsu Province, 215138 Patentee after: Suzhou Dawson Drilling and Production Equipment Co.,Ltd. Address before: 215137 Taiping Town, Suzhou, Jiangsu, Xiangcheng District Patentee before: SUZHOU DOUSON DRILLING & PRODUCTION EQUIPMENT Co.,Ltd. |
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| TR01 | Transfer of patent right |