CN210217683U - Follow-up type rotary annular blowout preventer - Google Patents
Follow-up type rotary annular blowout preventer Download PDFInfo
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- CN210217683U CN210217683U CN201921083950.XU CN201921083950U CN210217683U CN 210217683 U CN210217683 U CN 210217683U CN 201921083950 U CN201921083950 U CN 201921083950U CN 210217683 U CN210217683 U CN 210217683U
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Abstract
The utility model relates to a blowout preventer, in particular to a follow-up type rotary annular blowout preventer; the technical problems that the existing active rotary blowout preventer is complex in structure and multiple in rotating body components, so that the torque is large, the heat productivity is large and the service life is short are solved. The technical solution of the utility model is that: 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 component through a connecting sleeve; the shell comprises an upper shell and a lower shell which are connected; a piston capable of moving up and down is sleeved 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 support component; the upper end of the guide cylinder is supported on the piston through a second support assembly.
Description
Technical Field
The utility model relates to a preventer, concretely relates to rotatory annular preventer of follow-up type.
Background
The rotary blowout preventer is key equipment and special well control equipment for underbalanced drilling and is installed at the uppermost end of a wellhead blowout preventer stack. When drilling a hydrocarbon reservoir, in order to avoid the over-high pressure of the drilling fluid column, which causes the hydrocarbon reservoir to be dead pressed or polluted, a rotary blowout preventer is usually used to seal the annular space of a wellhead, so that the pressure of the drilling fluid column is slightly lower than the formation pressure, the slight overflow of the well bottom is kept, the operation of drilling while jetting or tripping under pressure is realized, and the rotary blowout preventer is also commonly used in workover operation.
The active rotary blowout preventer is characterized in that a set of rotary bearing system is additionally arranged in the inner cavity of the annular blowout preventer, the existing active rotary blowout preventer is complex in structure, a plurality of components of a rotary body are arranged, after an annular space between a drilling tool and a borehole in the well is sealed, components such as a rubber core, a piston and the like in a shell rotate under pressure together with a drilling tool, the torque is large, the heat productivity is large, and the service life is short.
SUMMERY OF THE UTILITY MODEL
In order to solve the current rotatory preventer structure of initiative type complicated, the part of rotator is many, leads to the moment of torsion big, calorific capacity big, the short technical problem of life, the utility model provides a rotatory annular preventer of follow-up type.
The technical solution of the utility model is that:
a follow-up type rotary annular blowout preventer is characterized in that:
comprises a shell, a rotary sealing component, 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 component 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 support assembly;
the upper end of the guide cylinder is supported on the piston through a second supporting assembly, and the outer wall of the guide cylinder is connected with the inner wall of the piston and the inner wall of the lower shell in a sliding manner;
the lower part of the piston is provided with a piston inner cavity with a lower opening; a first sealed cavity is formed between the inner cavity of the piston and the lower shell;
a second sealed 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 rotary sealing ring comprises a sealing ring body, a spring and an O-shaped ring; a sealing lip edge is arranged inside the sealing ring body; the spring is arranged in a gap between the sealing lip edge and the sealing ring body; the inner wall of the sealing lip edge is provided with a plurality of annular grooves; the O-shaped ring is arranged on the outer side surface 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 a bolt; the top of the sealing sleeve is fixedly connected with a pressing cap; and a high-pressure rotary sealing ring between the lower shell and the guide cylinder is fixed in the sealing sleeve through a support ring.
Further, in order to further reduce the friction force between the high-pressure rotary sealing ring and the guide cylinder, the follow-up type rotary annular blowout preventer further comprises a deep groove ball bearing arranged between the high-pressure rotary sealing ring and the support ring.
Further, go up the casing and include connecting piece and upper cover, go up the connecting piece and be for planting silk.
Further, the lower connecting piece is a wire planting piece.
Further, the upper connecting piece and the lower connecting piece are flanges.
Further, the follow-up type rotary annular blowout preventer further comprises a spacer ring arranged between the bearing seat and the baffle ring; and a plurality of oil holes are uniformly distributed on the side wall of the spacer ring along the circumferential direction.
Further, the follow-up rotary annular blowout preventer further comprises a first square sealing ring disposed between the piston and the guide cylinder.
Further, the follow-up rotary annular blowout preventer further comprises a second quad ring seal disposed between the piston and the gland.
The utility model discloses compare prior art's beneficial effect is:
1. the utility model discloses simple structure, the part of rotator is few, and in the annular space between drilling tool and the well in the closed well after, the piston does not rotate, because the external diameter of rotator is less, so the utility model discloses when rotatory along with oil pipe, the moment of torsion is little, the heat dissipation is few, long service life.
2. The utility model discloses a high pressure rotary seal circle includes sealing washer body, spring, "O" type circle, and the inside sealing lip limit that is equipped with of sealing washer body, spring setting are in the clearance between sealing lip limit and sealing washer body, and the inner wall in sealing lip limit sets up a plurality of annular grooves, "O" type circle sets up the lateral surface at the sealing washer body, and wearability and resistance to pressure are better, and life is longer.
Drawings
Fig. 1 is a front view of embodiment 1 of the present invention;
FIG. 2 is a plan view of embodiment 1;
fig. 3 is a structural view of a high-pressure rotary seal ring in embodiment 1;
FIG. 4 is a state diagram in the case of semi-sealing (oil-sealing) of example 1;
FIG. 5 is a state diagram of example 1 in a fully closed state (with the well shut-in);
fig. 6 is a structural view of embodiment 2 of the present invention;
the reference signs are:
1-upper housing, 101-upper connector, 102-upper cover, 2-lower housing, 201-lower connector, 202-main body, 203-sealing sleeve, 204-pressing cap, 205-first oil inlet, 206-second oil inlet, 3-rotary sealing component, 301-bearing seat, 302-hemispherical rubber core, 303-guide cylinder, 4-piston, 401-piston cavity, 5-first support component, 6-second support component, 7-baffle ring, 8-high pressure rotary sealing ring, 801-sealing ring body, 8011-sealing lip, 80111-groove, 802-spring, 803- "O" ring, 10-first sealing cavity, 11-second sealing cavity, 12-support ring, 13-first square sealing ring, 14-a second square sealing ring, 15-an oil pipe, 16-a connecting sleeve, 17-a square bushing, 18-a spacer ring and 19-a deep groove ball bearing.
Detailed Description
The invention is further described with reference to the accompanying drawings and specific embodiments.
Example 1:
referring to fig. 1 and 3, the follow-up type rotary annular blowout preventer comprises a housing which is communicated up and down, a rotary seal assembly 3 arranged in the housing, a piston 4, a baffle ring 7 and a square bushing 17 arranged above the housing. The square bushing 17 is fixedly connected to the upper part of the rotary seal assembly 3 through a connecting sleeve 16. The shell comprises an upper shell 1 and a lower shell 2 which are connected.
The rotary sealing 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 support assembly 6, and the outer wall of the lower end of the guide cylinder 303 is connected with the inner wall of the piston 4 and the inner wall of the lower shell in a sliding manner. The guide cylinder 303 may be an integral piece or a separate piece, and in order to facilitate installation and save materials, the guide cylinder 303 in this embodiment is a separate piece, and includes a supporting disk and a guide section that are connected in a sealing manner. The first supporting component 5 and the second supporting component 6 can be a self-aligning thrust roller bearing and can also be a centering bearing and a thrust bearing which are used in a matched mode. In order to simplify the structure, the first support member 5 and the second support member 6 in the present embodiment are both self-aligning thrust 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 cavity 401 and the lower shell. A second sealed cavity 11 is formed among the outer wall of the piston, the baffle ring 7 and the lower shell. The first sealed cavity 10 and the second sealed 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 upper case 2 includes an upper connector 101 and an upper cover 102.
The lower housing 2 includes a lower connector 201, a main body 202, a sealing boot 203, and a press cap 204. The gland 203 is disposed coaxially with the body 202, and the gland 203 is bolted to the bottom of the body 202. 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 inside the sealing ring body 801; a gap is arranged between the sealing lip 8011 and the outer ring of the sealing ring body 801; a spring 802 is arranged axially on the outer wall of the sealing lip 8011 and a plurality of annular grooves 80111 are arranged in the inner bore of the sealing lip 8011. An O-shaped ring 803 is arranged on the outer circle of the sealing ring body 801. In order to improve the sealing reliability, a first square sealing ring 13 is further installed between the piston 4 and the guide cylinder 303.
The high-pressure rotary seal ring 8 between the seal sleeve 203 and the guide cylinder 303 is fixed by a support ring 12 arranged at the lower part of the high-pressure rotary seal ring 8, and in order to further reduce the friction force 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 quad ring 14 is also installed between the press cap 204 and the guide cylinder 303.
A baffle ring 7 is arranged at the mouth part of the main body 202, and the baffle ring 7 is compressed 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 the bearing lubrication, 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 formed in the main body 202; the two first oil inlet holes 205 are both communicated with the first seal cavity 10; the two second oil inlet holes 206 are both communicated with the second seal cavity 11.
Referring to fig. 4 and 5, the following type rotary annular blowout preventer operates as follows:
referring to fig. 4, during semi-sealing (during oil sealing), the first oil inlet 205 feeds oil, hydraulic oil enters the first seal cavity 10, the piston 4 drives the guide cylinder 303 to move upwards, and the hemispherical rubber core 301 is compressed to hold the oil pipe 15 tightly.
When the fault in the well is eliminated and the oil outlet pipe 15 needs to be lifted, the second oil inlet hole 206 is filled with oil, hydraulic oil enters the second seal cavity 11, the piston 4 drives the guide cylinder 303 to move downwards, the hemispherical rubber core 301 is rebounded to the initial state, and the oil outlet pipe 15 can be lifted to perform the next procedure.
Referring to fig. 5, when the well is completely sealed (when the well is closed), oil enters the first oil inlet 205, hydraulic oil enters the first seal cavity 10, the piston 4 drives the guide cylinder 303 to move upwards, the guide cylinder 303 compresses the hemispherical rubber core 301, and the inner hole of the compressed hemispherical rubber core 301 is completely contracted to seal the empty well.
Example 2:
referring to fig. 6, embodiment 2 is similar in structure to embodiment 1 except that: the lower connecting member 201 in embodiment 2 is a flange.
The above is only the embodiment of the present invention, and is not the limitation of the protection scope of the present invention, all the equivalent structure changes made in the contents of the specification and the drawings, or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims (10)
1. A follow-up type rotary annular blowout preventer is characterized in that: comprises a shell which is communicated up and down, a rotary sealing component (3) arranged in the shell, a piston (4), a baffle ring (7) and a square bushing (17) arranged above the shell; the square bushing (17) is fixedly connected to the upper part of the rotary sealing component (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) 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 seat (301) is supported in the upper shell (1) through a first support assembly (5);
the upper end of the guide cylinder (303) is supported on the piston (4) through a second support assembly (6), and the outer wall of the guide cylinder (303) is connected with the inner wall of the piston (4) and the inner wall of the lower shell (2) in a sliding manner;
the lower part of the piston (4) is provided with a piston inner cavity (401) with a lower opening; a first sealed cavity (10) is formed between the piston inner cavity (401) and the lower shell (2);
a second sealed cavity (11) is formed among the outer wall of the piston (4), the baffle ring (7) and the lower shell (2);
the first sealed cavity (10) and the second sealed 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).
2. The follow-up rotary annular blowout preventer of claim 1, wherein: 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 edge (8011) is arranged inside the sealing ring body (801); the spring (802) is disposed in the gap between the sealing lip (8011) and the seal ring body (801); a plurality of annular grooves (80111) are arranged on the inner wall of the sealing lip (8011); the O-shaped ring (803) is arranged on the outer side surface of the sealing ring body (801).
3. The follow-up type rotary annular blowout preventer according to claim 1 or 2, wherein: the lower shell (2) comprises a lower connecting piece (201), a main body (202), a sealing sleeve (203) and a pressing 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 a bolt; the top of the sealing sleeve (203) is fixedly connected with a pressing cap (204); and a high-pressure rotary sealing ring (8) between the lower shell (2) and the guide cylinder (303) is fixed in the sealing sleeve (203) through a support ring (12).
4. The follow-up rotary annular blowout preventer of claim 3, wherein: the high-pressure rotary sealing ring device further comprises a deep groove ball bearing (19) arranged between the high-pressure rotary sealing ring (8) and the support ring (12).
5. The follow-up rotary annular blowout preventer of claim 4, wherein: go up casing (1) including last connecting piece (101) and upper cover (102), go up connecting piece (101) for planting silk.
6. The follow-up rotary annular blowout preventer of claim 5, wherein: the lower connecting piece (201) is used for planting wires.
7. The follow-up rotary annular blowout preventer of claim 5, wherein: the upper lower connecting piece (201) is a flange.
8. The follow-up rotary annular blowout preventer of claim 6, wherein: the bearing block further comprises a spacer ring (18) arranged between the bearing block (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.
9. The follow-up rotary annular blowout preventer of claim 8, wherein: the piston type air conditioner further comprises a first square sealing ring (13) arranged between the piston (4) and the guide cylinder (303).
10. The follow-up rotary annular blowout preventer of claim 9, 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 |
|---|---|---|---|
| CN201921083950.XU CN210217683U (en) | 2019-07-11 | 2019-07-11 | Follow-up type rotary annular blowout preventer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921083950.XU CN210217683U (en) | 2019-07-11 | 2019-07-11 | Follow-up type rotary annular blowout preventer |
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| Publication Number | Publication Date |
|---|---|
| CN210217683U true CN210217683U (en) | 2020-03-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921083950.XU Active CN210217683U (en) | 2019-07-11 | 2019-07-11 | Follow-up type rotary annular blowout preventer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110242242A (en) * | 2019-07-11 | 2019-09-17 | 西安宇星石油机械新技术开发有限公司 | Follow-up type rotary annular preventer |
| CN112647886A (en) * | 2020-12-31 | 2021-04-13 | 江苏信得石油机械股份有限公司 | Annular blowout preventer for oil field well mouth |
| CN114396241A (en) * | 2022-03-28 | 2022-04-26 | 四川新为橡塑有限公司 | Double-layer sealed spherical rubber core and annular blowout preventer |
-
2019
- 2019-07-11 CN CN201921083950.XU patent/CN210217683U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110242242A (en) * | 2019-07-11 | 2019-09-17 | 西安宇星石油机械新技术开发有限公司 | Follow-up type rotary annular preventer |
| CN110242242B (en) * | 2019-07-11 | 2024-06-28 | 西安宇星石油机械新技术开发有限公司 | Follow-up rotary annular blowout preventer |
| CN112647886A (en) * | 2020-12-31 | 2021-04-13 | 江苏信得石油机械股份有限公司 | Annular blowout preventer for oil field well mouth |
| CN112647886B (en) * | 2020-12-31 | 2022-07-05 | 江苏信得石油机械股份有限公司 | Annular blowout preventer for oil field well mouth |
| CN114396241A (en) * | 2022-03-28 | 2022-04-26 | 四川新为橡塑有限公司 | Double-layer sealed spherical rubber core and annular blowout preventer |
| CN114396241B (en) * | 2022-03-28 | 2022-06-10 | 四川新为橡塑有限公司 | Double-layer sealed spherical rubber core and annular blowout preventer |
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