CN110242242B - Follow-up rotary annular blowout preventer - Google Patents
Follow-up rotary annular blowout preventer Download PDFInfo
- Publication number
- CN110242242B CN110242242B CN201910625523.8A CN201910625523A CN110242242B CN 110242242 B CN110242242 B CN 110242242B CN 201910625523 A CN201910625523 A CN 201910625523A CN 110242242 B CN110242242 B CN 110242242B
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- Prior art keywords
- sealing
- rotary
- ring
- piston
- shell
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Links
- 238000007789 sealing Methods 0.000 claims abstract description 101
- 239000003921 oil Substances 0.000 claims description 26
- 239000010720 hydraulic oil Substances 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 238000005553 drilling Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 125000006850 spacer group Chemical group 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
-
- 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
- E21B33/06—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers
-
- 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
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- 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)
- Sealing Devices (AREA)
- Joints Allowing Movement (AREA)
Abstract
The invention relates to a blowout preventer, in particular to a follow-up rotary annular blowout preventer; the technical problems of large torque, large heating value and short service life of the existing active rotary blowout preventer due to complex structure and a plurality of rotary body parts are solved. The technical scheme of the invention is as follows: a follow-up rotary annular blowout preventer comprises a shell, a rotary sealing assembly, a piston, a baffle ring and a square bushing, wherein the shell is communicated up and down; the square bushing is fixedly connected to the upper part of the rotary sealing assembly through a connecting sleeve; the shell comprises an upper shell and a lower shell which are connected; the lower shell is internally sleeved with a piston capable of moving up and down; the rotary sealing assembly comprises a guide cylinder, a hemispherical rubber core arranged above the guide cylinder and a bearing seat arranged above the hemispherical rubber core and in sealing fit with the hemispherical rubber core; the bearing seat is supported in the upper shell through the first supporting component; the upper end of the guide cylinder is supported on the piston through a second supporting component.
Description
Technical Field
The invention relates to a blowout preventer, in particular to a follow-up rotary annular blowout preventer.
Background
The rotary blowout preventer is key equipment of underbalanced drilling and special well control equipment and is arranged at the uppermost end of a wellhead blowout preventer stack. When the hydrocarbon reservoir is drilled, in order to avoid the situation that the pressure of the liquid column of the drilling fluid is too high, so that the hydrocarbon reservoir is pressed down or polluted, a rotary blowout preventer is often utilized to seal an annular space at a wellhead, so that the pressure of the liquid column of the drilling fluid is slightly lower than the pressure of a stratum, slight overflow of a bottom of a well is kept, drilling is realized while spraying or under-pressure tripping operation is realized, and the hydraulic well is also commonly used in well repairing operation.
The active rotary blowout preventer has one set of rotary bearing system in the inner cavity of the annular blowout preventer, and has complicated structure, more parts of rotating body, great torque, great heat amount and short service life.
Disclosure of Invention
The invention provides a follow-up rotary annular blowout preventer, which aims to solve the technical problems of large torque, large heating value and short service life caused by the fact that the existing active rotary blowout preventer is complex in structure and many in parts of a rotary body.
The technical scheme of the invention is as follows:
A follow-up rotary annular blowout preventer is characterized in that:
Comprises a shell which is communicated up and down, a rotary sealing component arranged in the shell, a piston, a baffle ring and a square bushing arranged above the shell; the square bushing is fixedly connected to the upper part of the rotary sealing assembly through a connecting sleeve; the shell comprises an upper shell and a lower shell which are connected;
the piston is sleeved in the lower shell and can move up and down in the lower shell;
The rotary sealing assembly comprises a guide cylinder, a hemispherical rubber core arranged above the guide cylinder and a bearing seat arranged above the hemispherical rubber core and in sealing fit with the hemispherical rubber core;
The bearing seat is supported in the upper shell through a first supporting component;
the upper end of the guide cylinder is supported on the piston through a second supporting component, and the outer wall of the guide cylinder is in sliding connection with the inner wall of the piston and the inner wall of the lower shell;
The lower part of the piston is provided with a piston inner cavity with a lower opening; a first sealing cavity is formed between the inner cavity of the piston and the lower shell;
A second sealing cavity is formed among the outer wall of the piston, the baffle ring and the lower shell;
the first sealing cavity and the second sealing cavity are respectively communicated with external hydraulic oil;
the lower shell is of a double-layer structure, and high-pressure rotary sealing rings are arranged between the inner layer of the lower shell and the guide cylinder and between the piston and the guide cylinder.
Further, in order to prolong the service life of the sealing element under the working condition of high-pressure rotation, the high-pressure rotation sealing ring comprises a sealing ring body, a spring and an O-shaped ring; a sealing lip is arranged in the sealing ring body; the spring is arranged in a gap between the sealing lip and the sealing ring body; the inner wall of the sealing lip is provided with a plurality of annular grooves; the O-shaped ring is arranged on the outer side face of the sealing ring body.
Further, in order to save materials and reduce production cost, the lower shell comprises a main body, a lower connecting piece, a sealing sleeve and a pressing cap; the sealing sleeve is coaxially arranged with the main body and is connected to the bottom of the main body through bolts; the top of the sealing sleeve is fixedly connected with a pressing cap; the high-pressure rotary sealing ring between the lower shell and the guide cylinder is fixed in the sealing sleeve through the supporting ring.
Further, to further reduce friction between the high pressure rotary seal ring and the guide cylinder, the follow-up rotary annular blowout preventer further includes a deep groove ball bearing disposed between the high pressure rotary seal ring and the support ring.
Further, the upper shell comprises an upper connecting piece and an upper cover, and the upper connecting piece is a wire planting piece.
Further, the lower connecting piece is a wire planting piece.
Further, the upper and lower connecting pieces are flanges.
Further, the follow-up rotary annular blowout preventer further comprises a spacer ring disposed between the bearing housing and the retainer ring; the side wall of the spacing ring is uniformly provided with a plurality of oil holes along the circumferential direction.
Further, the follow-up rotary annular blowout preventer may further comprise a first square seal ring disposed between the piston and the guide cylinder.
Further, the follow-up rotary annular blowout preventer may further comprise a second square seal ring disposed between the piston and the seal cartridge.
Compared with the prior art, the invention has the beneficial effects that:
1. The invention has simple structure, less parts of the rotating body, and the piston does not rotate after the annulus between the drilling tool and the well hole is closed, and the outer diameter of the rotating body is smaller, so that the invention has small torque, less heat dissipation and long service life when rotating along with the oil pipe.
2. The high-pressure rotary sealing ring comprises a sealing ring body, a spring and an O-shaped ring, wherein a sealing lip is arranged in the sealing ring body, the spring is arranged in a gap between the sealing lip and the sealing ring body, a plurality of annular grooves are formed in the inner wall of the sealing lip, the O-shaped ring is arranged on the outer side surface of the sealing ring body, the wear resistance and the pressure resistance are better, and the service life is longer.
Drawings
Fig. 1 is a front view of embodiment 1 of the present invention;
FIG. 2 is a top view of example 1;
FIG. 3 is a block diagram of a high pressure rotary seal ring in example 1;
FIG. 4 is a state diagram of example 1 when the tubing is semi-sealed (oil sealed);
FIG. 5 is a state diagram of the full seal (Guan Kongjing) of example 1;
FIG. 6 is a block diagram of embodiment 2 of the present invention;
the reference numerals are:
1-upper shell, 101-upper connecting piece, 102-upper cover, 2-lower shell, 201-lower connecting piece, 202-main body, 203-sealing sleeve, 204-press cap, 205-first oil inlet hole, 206-second oil inlet hole, 3-rotary sealing component, 301-bearing seat, 302-hemispherical rubber core, 303-guide cylinder, 4-piston, 401-piston inner cavity, 5-first supporting component, 6-second supporting component, 7-baffle ring, 8-high pressure rotary sealing ring, 801-sealing ring body, 8011-sealing lip, 8011-groove, 802-spring, 803-O-shaped ring, 10-first sealing cavity, 11-second sealing cavity, 12-supporting ring, 13-first square sealing ring, 14-second square sealing ring, 15-oil pipe, 16-connecting sleeve, 17-square bushing, 18-spacer ring and 19-deep groove ball bearing.
Detailed Description
The invention is further described below with reference to the accompanying drawings and specific examples.
Example 1:
Referring to fig. 1, 2 and 3, the follow-up rotary annular blowout preventer comprises a housing, a rotary seal assembly 3, a piston 4, a baffle ring 7 and a square bushing 17, wherein the housing is communicated up and down, the rotary seal assembly 3, the piston 4 and the baffle ring 7 are arranged in the housing, and the square bushing 17 is arranged above the housing. The square bushing 17 is fixedly connected to the upper part of the rotary sealing assembly 3 through a connecting sleeve 16. The housing comprises an upper housing 1 and a lower housing 2 connected.
The rotary seal assembly 3 comprises a guide cylinder 303, a hemispherical rubber core 302 placed above the guide cylinder 303, and a bearing seat 301 arranged above the hemispherical rubber core 302 and in sealing fit with the hemispherical rubber core 302.
The bearing housing 301 is supported within the upper housing by the first support assembly 5.
The upper end of the guide cylinder 303 is supported on the piston 4 through the second supporting component 6, and the outer wall of the lower end of the guide cylinder 303 is in sliding connection with the inner wall of the piston 4 and the inner wall of the lower shell. The guide cylinder 303 may be an integral part or a separate part, and in order to facilitate installation and save materials, the guide cylinder 303 in this embodiment is a separate part, and includes a support disc and a guide section that are in sealing connection. The first support component 5 and the second support component 6 can be thrust self-aligning roller bearings or supporting righting bearings and thrust bearings. In order to simplify the structure, the first support member 5 and the second support member 6 in this embodiment are both thrust self-aligning roller bearings.
The lower part of the piston 4 is provided with a piston inner cavity 401 with a lower opening; a first sealed chamber 10 is formed between the piston inner chamber 401 and the lower housing. A second sealing cavity 11 is formed among the outer wall of the piston, the baffle ring 7 and the lower shell. The first sealing cavity 10 and the second sealing cavity 11 are respectively communicated with external hydraulic oil. The lower shell 2 has a double-layer structure, and high-pressure rotary sealing rings 8 are arranged between the inner layer of the lower shell 2 and the guide cylinder 303 and between the piston 4 and the guide cylinder 303.
The upper case 2 includes an upper connector 101 and an upper cover 102.
The lower housing 2 comprises a lower connector 201, a main body 202, a sealing sleeve 203 and a press cap 204. The sealing sleeve 203 is coaxially arranged with the main body 202, and the sealing sleeve 203 is connected to the bottom of the main body 202 through bolts. The top of the sealing sleeve 203 is fixedly connected with a pressing cap 204.
The high pressure rotary seal ring 8 includes a seal ring body 801, a spring 802, and an "O" ring 803. A longer sealing lip 8011 is arranged in the sealing ring body 801; a gap is arranged between the sealing lip 8011 and the outer ring of the sealing ring body 801; the outer wall of the sealing lip 8011 is provided with a spring 802 in the axial direction, and the inner hole of the sealing lip 8011 is provided with a plurality of annular grooves 80111. An O-shaped ring 803 is arranged on the outer circle of the sealing ring body 801. In order to improve the reliability of the seal, a first square sealing ring 13 is also mounted between the piston 4 and the guide cylinder 303.
The high-pressure rotary seal ring 8 between the seal cartridge 203 and the guide cylinder 303 is fixed by a support ring 12 provided at the lower part of the high-pressure rotary seal ring 8, and in order to further reduce the friction between the high-pressure rotary seal ring 8 and the guide cylinder 303, the high-pressure rotary seal ring 8 and the support ring 12 are provided with deep groove ball bearings 19. A second square sealing ring 14 is also arranged between the press cap 204 and the guide cylinder 303.
The mouth of the main body 202 is provided with a baffle ring 7, and the baffle ring 7 is pressed between the upper cover 102 and the main body 202; the small end of the piston 4 extends into the inner hole of the baffle ring 7 and can slide up and down in the inner hole of the baffle ring 7. In order to facilitate lubrication of the bearing, a spacer ring 18 is arranged between the bearing seat 301 and the baffle ring 7, and a plurality of oil holes are uniformly distributed on the side wall of the spacer ring 18 along the circumferential direction.
Two first oil inlet holes 205 and two second oil inlet holes 206 are arranged on the main body 202; both first oil inlet holes 205 are communicated with the first sealed cavity 10; both of the second oil inlet holes 206 communicate with the second sealed chamber 11.
Referring to fig. 4 and 5, the following rotary annular blowout preventer operates as follows:
Referring to fig. 4, in the semi-sealing (oil pipe sealing), the first oil inlet hole 205 is filled with oil, hydraulic oil enters the first sealing cavity 10, the piston 4 drives the guide cylinder 303 to move upwards, and the hemispherical rubber core 301 is compressed to tightly hold the oil pipe 15.
When the fault in the well is removed and the oil outlet pipe 15 needs to be started, the second oil inlet hole 206 is filled with oil, the hydraulic oil enters the second sealing cavity 11, the piston 4 drives the guide cylinder 303 to move downwards, the hemispherical rubber core 301 rebounds to an initial state, and the oil outlet pipe 15 can be started for the next process.
Referring to fig. 5, when the well is fully sealed (when the well is closed), the first oil inlet 205 is filled with oil, hydraulic oil enters the first sealing cavity 10, the piston 4 drives the guide cylinder 303 to move upwards, the guide cylinder 303 compresses the hemispherical rubber core 301, the inner hole of the hemispherical rubber core 301 is fully contracted after being compressed, and the well is sealed.
Example 2:
referring to fig. 6, embodiment 2 is similar in structure to embodiment 1, except that: the lower connector 201 in embodiment 2 is a flange.
The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the present invention and the accompanying drawings, or direct or indirect application in other related technical fields, are included in the scope of the present invention.
Claims (8)
1. A follow-up rotary annular blowout preventer, comprising: comprises a shell body which is communicated up and down, a rotary sealing assembly (3), a piston (4), a baffle ring (7) and a square bushing (17) which is arranged above the shell body; the square bushing (17) is fixedly connected to the upper part of the rotary sealing assembly (3) through a connecting sleeve (16); the shell comprises an upper shell (1) and a lower shell (2) which are connected;
The piston (4) is sleeved in the lower shell (2) and can move up and down in the lower shell (2);
the rotary sealing assembly (3) comprises a guide cylinder (303), a hemispherical rubber core (302) arranged above the guide cylinder (303) and a bearing seat (301) arranged above the hemispherical rubber core (302) and in sealing fit with the hemispherical rubber core (302);
the bearing seat (301) is supported in the upper shell (1) through a first supporting component (5);
The upper end of the guide cylinder (303) is supported on the piston (4) through a second supporting component (6), and the outer wall of the guide cylinder (303) is in sliding connection with the inner wall of the piston (4) and the inner wall of the lower shell (2); the guide cylinder (303) is a split piece and comprises a support disc and a guide section which are connected in a sealing way;
The lower part of the piston (4) is provided with a piston inner cavity (401) with a lower opening; a first sealing cavity (10) is formed between the piston inner cavity (401) and the lower shell (2);
A second sealing cavity (11) is formed among the outer wall of the piston (4), the baffle ring (7) and the lower shell (2);
the first sealing cavity (10) and the second sealing cavity (11) are respectively communicated with external hydraulic oil;
The lower shell (2) is of a double-layer structure, and high-pressure rotary sealing rings (8) are arranged between the inner layer of the lower shell (2) and the guide cylinder (303) and between the piston (4) and the guide cylinder (303); the high-pressure rotary sealing ring (8) between the lower shell (2) and the guide cylinder (303) is fixed in the sealing sleeve (203) through the supporting ring (12);
The lower shell (2) comprises a lower connecting piece (201), a main body (202), a sealing sleeve (203) and a press cap (204); the sealing sleeve (203) is coaxially arranged with the main body (202), and the sealing sleeve (203) is connected to the bottom of the main body (202) through bolts; the top of the sealing sleeve (203) is fixedly connected with a pressing cap (204);
The high-pressure rotary sealing ring (8) comprises a sealing ring body (801), a spring (802) and an O-shaped ring (803); a sealing lip (8011) is arranged in the sealing ring body (801); the spring (802) is arranged in a gap between the sealing lip (8011) and the sealing ring body (801); the inner wall of the sealing lip (8011) is provided with a plurality of annular grooves (80111); the O-shaped ring (803) is arranged on the outer side surface of the sealing ring body (801);
The opening part of the main body (202) is provided with the baffle ring (7), and the baffle ring (7) is pressed between the upper cover (102) of the upper shell (2) and the main body (202); two first oil inlet holes (205) and two second oil inlet holes (206) are formed in the main body (202); the two first oil inlet holes (205) are communicated with the first sealing cavity (10); both the second oil inlet holes (206) are communicated with the second sealing cavity (11).
2. The follow-up rotary annular blowout preventer of claim 1, wherein: the high-pressure rotary sealing ring also comprises a deep groove ball bearing (19) arranged between the high-pressure rotary sealing ring (8) and the supporting ring (12).
3. The follow-up rotary annular blowout preventer of claim 2, wherein: the upper shell (1) comprises an upper connecting piece (101) and an upper cover (102), and the upper connecting piece (101) is a wire planting piece.
4. The follow-up rotary annular blowout preventer of claim 3, wherein: the lower connecting piece (201) is a wire planting piece.
5. The follow-up rotary annular blowout preventer of claim 3, wherein: the lower connecting piece (201) is a flange.
6. The follow-up rotary annular blowout preventer of claim 4, wherein: the device also comprises a spacing ring (18) arranged between the bearing seat (301) and the baffle ring (7); the side wall of the spacing ring (18) is uniformly provided with a plurality of oil holes along the circumferential direction.
7. The follow-up rotary annular blowout preventer of claim 6, wherein: also comprises a first square sealing ring (13) arranged between the piston (4) and the guide cylinder (303).
8. The follow-up rotary annular blowout preventer of claim 7, wherein: the sealing device also comprises a second square sealing ring (14) arranged between the guide cylinder (303) and the sealing sleeve (203).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910625523.8A CN110242242B (en) | 2019-07-11 | 2019-07-11 | Follow-up rotary annular blowout preventer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910625523.8A CN110242242B (en) | 2019-07-11 | 2019-07-11 | Follow-up rotary annular blowout preventer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110242242A CN110242242A (en) | 2019-09-17 |
| CN110242242B true CN110242242B (en) | 2024-06-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910625523.8A Active CN110242242B (en) | 2019-07-11 | 2019-07-11 | Follow-up rotary annular blowout preventer |
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| CN (1) | CN110242242B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115898319B (en) * | 2023-02-24 | 2023-05-09 | 四川新为橡塑有限公司 | Double-rubber-core composite annular blowout preventer |
| CN119062270B (en) * | 2024-11-05 | 2025-03-04 | 西安宇星石油机械新技术开发有限公司 | Rotary blowout preventer while drilling for top drive |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210217683U (en) * | 2019-07-11 | 2020-03-31 | 西安宇星石油机械新技术开发有限公司 | Follow-up type rotary annular blowout preventer |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101705801B (en) * | 2009-11-06 | 2013-01-09 | 宝鸡石油机械有限责任公司 | Combined annular blowout preventer |
| RU2527054C1 (en) * | 2013-07-08 | 2014-08-27 | Закрытое акционерное общество "Научно-производственное предприятие "СибБурМаш" | Spherical circular rotary preventer |
| CN103470207A (en) * | 2013-10-09 | 2013-12-25 | 盐城亚雄机械制造有限公司 | Annular preventer with internally-arranged circulating water cooling system |
| CN106065769A (en) * | 2016-08-12 | 2016-11-02 | 宝鸡石油机械有限责任公司广汉钻采设备厂 | Drilling and repairing well annular preventer |
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2019
- 2019-07-11 CN CN201910625523.8A patent/CN110242242B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210217683U (en) * | 2019-07-11 | 2020-03-31 | 西安宇星石油机械新技术开发有限公司 | Follow-up type rotary annular blowout preventer |
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| CN110242242A (en) | 2019-09-17 |
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