Synchronous driving mechanism of blowout preventer

Abstract

The utility model discloses a synchronous driving mechanism of a blowout preventer, and mainly relates to the technical field of wellhead blowout prevention. Comprising a rack fixedly installed relative to the blowout preventer, rotating pieces rotationally installed are arranged at the two ends of the rack, mortises connected with square pieces at the two ends of the blowout preventer in an inserted mode are formed in the centers of the rotating pieces in a penetrating mode, transmission shafts rotationally installed relative to the rack are arranged on the rack in a bilateral symmetry mode, and the transmission shafts reversely rotate at the same speed based on electric drive. And the outer end of the transmission shaft is in mechanical transmission connection with the rotating piece in the same direction. The device has the advantages that the device is matched with a blowout preventer, high-precision synchronous driving of the two ends is achieved, and efficient and safe wellhead blowout prevention response is completed.

Description

Technical Field

[0001] This utility model relates to the field of wellhead blowout prevention technology, specifically a blowout preventer synchronous drive mechanism. Background Technology

[0002] When working at the wellhead in an oilfield, blowout preventers are essential for preventing blowouts, controlling high-pressure fluids, and replacing gas-damaged mud.

[0003] The main components of a wellhead blowout preventer include the housing, side door, locking shaft, and gate (seal). When there are drill strings, tubing, or casing in the well, the rotating components are mainly used to open and close the gate. These components are usually located on both sides of the blowout preventer and can control the movement of the gate by rotating it, so that the gate moves closer to the center, thereby forming an annular sealing space.

[0004] The existing operating method involves rotating both ends separately, with one person controlling one end. This requires both rapid response and consistent rotation. Otherwise, the gate may experience uneven force during closure, failing to completely seal the wellhead and affecting the blowout preventer's sealing performance. Furthermore, the slow manual response may prevent the blowout preventer from closing quickly and accurately, especially in high-pressure wells or complex conditions, which increases well control risks. Utility Model Content

[0005] The purpose of this invention is to provide a blowout preventer synchronous drive mechanism, which works in conjunction with the blowout preventer to achieve high-precision synchronous drive at both ends, thereby completing an efficient and safe wellhead blowout prevention response.

[0006] To achieve the above objectives, this utility model employs the following technical solution:

[0007] A blowout preventer synchronous drive mechanism includes a frame fixedly mounted relative to the blowout preventer. Rotating components are rotatably mounted at both ends of the frame. A tenon hole is passed through the center of each rotating component to engage with square components at both ends of the blowout preventer. The frame is symmetrically provided with drive shafts rotatably mounted relative to it. The drive shafts rotate in opposite directions at the same speed based on electric drive. The outer ends of the drive shafts are mechanically connected to the rotating components in the same direction.

[0008] A gantry frame is fixed in the middle of the frame. The drive shaft is symmetrically arranged on both sides of the gantry frame. A central shaft is rotatably connected through the middle of the gantry frame. The central shaft is driven by a motor. A drive gear is provided at the inner end of the central shaft and located inside the gantry frame. Synchronous gears that mesh with the drive gear are symmetrically arranged on both sides of the gantry frame. Both the synchronous gear and the drive gear are bevel gears. The synchronous gear is fixedly connected to the inner end of the drive shaft.

[0009] Bearing seats are fixed at both ends of the frame. The outer end of the drive shaft is mounted on the bearing seat and is rotatably connected to the frame through the bearing seat. The two sides of the portal frame are symmetrically provided with inner bearings that pass through it. The inner end of the drive shaft is mounted on the inner bearing and is rotatably connected to the portal frame through the inner bearing.

[0010] The rotating component is a side sprocket, and the two ends of the drive shaft are symmetrically provided with drive sprockets, with a chain between the side sprockets and the drive sprockets.

[0011] The frame adopts a long rectangular frame structure, and the frame is also covered with a shell. The shell includes a main cover and side covers. The main cover is a rectangular shell structure adapted to the frame. The side of the main cover has a rectangular opening. The frame is fixed at the opening. The side covers are in two sets and are symmetrically fixed at both ends of the main cover. The rotating component is rotatably installed at the end of the side cover.

[0012] The side cover has a circular opening at its outer end away from the main cover. A bearing is installed inside the circular opening. The rotating component is a side sprocket and is rotatably mounted on the bearing. The tenon hole is located through the center of the side sprocket. Drive sprockets are symmetrically provided at both ends of the drive shaft. A chain is provided between the side sprocket and the drive sprocket.

[0013] The frame is symmetrically equipped with clamping mechanisms for fixing to both sides of the blowout preventer.

[0014] The clamping mechanism includes a clamping seat and a clamping block. The clamping seat is fixed on the frame. The clamping seat has a first arc-shaped groove on the side away from the frame. The clamping block has a second arc-shaped groove on the side near the clamping seat that is opposite to the first arc-shaped groove. The first arc-shaped groove has threaded grooves on both sides located on the clamping seat. The second arc-shaped groove has fastening bolts on both sides that pass through it and are threadedly engaged with it.

[0015] It also includes two conversion components located outside the side sprockets. One end of the conversion component is provided with a square groove corresponding to the square parts at both ends of the blowout preventer, and the other end of the conversion component is provided with a square protrusion.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] This mechanism is used to fit onto a wellhead blowout preventer (BOP). Through tenons in the rotating parts at both ends, it passes through the square components at both ends of the BOP, thus synchronizing the rotation of the BOP. Simultaneously, it utilizes electrically controlled, synchronously controlled rotational drives and transmissions to achieve synchronized control of the rotation on both sides of the BOP, ensuring coaxial engagement and sealing of the valve plate relative to the tubing components, preventing eccentricity, improving sealing effectiveness, and enhancing the efficiency and safety of BOP operations. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the present invention.

[0019] Figure 2 This is a top view of the internal structure of this utility model (with the casing removed).

[0020] Figure 3 This is a schematic diagram of the present invention in conjunction with a blowout preventer.

[0021] Figure 4 This is a schematic diagram of the present invention after the housing is removed and in conjunction with the blowout preventer.

[0022] Figure 5 This is a schematic diagram of the internal structure of this utility model.

[0023] Figure 6 This is a schematic diagram of the conversion component of this utility model.

[0024] The labels shown in the attached diagram:

[0025] 1. Frame; 2. Clamping seat; 3. Clamping block; 4. First arc groove; 5. Second arc groove; 6. Main cover; 7. Side cover; 8. Central shaft; 9. Circular opening; 10. Side sprocket; 11. Drive sprocket; 12. Bearing seat; 13. Drive shaft; 14. Synchronizing gear; 15. Drive gear; 16. Gantry frame; 17. Chain; 18. Tenon hole; 19. Converter; 20. Square groove; 21. Square protrusion. Detailed Implementation

[0026] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined in this application.

[0027] Unless otherwise specified, the instruments, reagents, and materials used in the following embodiments are all conventional instruments, reagents, and materials already available in the prior art and can be obtained through legitimate commercial channels. Unless otherwise specified, the experimental methods and detection methods used in the following embodiments are all conventional experimental methods and detection methods already available in the prior art.

[0028] In current production processes, at least three people are often required: one person shouts commands to rotate the valve at one end, and another person is responsible for directing and observing to ensure that the actions of the operators at both ends are coordinated. This is very labor-intensive and time-consuming, but it still cannot guarantee the complete synchronization of the gate closure.

[0029] This device is mainly used in conjunction with the blowout preventer to achieve high-precision synchronous drive at both ends. The main structure includes: frame 1 and housing.

[0030] The frame 1 and the housing are the skeleton and supporting structure of the entire mechanism.

[0031] The frame 1 adopts a long rectangular frame structure, which is obtained by welding or bolting square steel profiles. The frame 1 is fixed side by side to one side of the blowout preventer during use.

[0032] The frame 1 is symmetrically fixed with clamping mechanisms on both sides. The clamping mechanisms are used to fix the mechanism to the blowout preventer. The clamping mechanisms include clamping seats 2, clamping blocks 3, and fastening bolts. The clamping seats 2 are fixed to the frame 1. The side of the clamping seats 2 away from the frame 1 is provided with a first arc-shaped groove 4. The side of the clamping blocks 3 near the clamping seats 2 is provided with a second arc-shaped groove 5 opposite to the first arc-shaped groove 4. The first arc-shaped groove 4 is provided with threaded grooves on both sides of the clamping seats 2. The second arc-shaped groove 5 is provided with fastening bolts that pass through it and are threadedly engaged with it. The fastening bolts are threadedly connected to the threaded grooves, thereby fixing the clamping component to the clamping seats 2 and clamping it to both sides of the blowout preventer.

[0033] The housing is fixed to the outside of the frame 1 by bolts. The housing includes a main cover 6 and side covers 7. The main cover 6 is a rectangular shell structure and is fitted onto the side of the frame 1 away from the clamping mechanism. The side of the main cover 6 has a rectangular opening. The frame 1 is installed at the opening, corresponding in size to the opening. The side covers 7 are in two sets and are symmetrically fixed to both ends of the main cover 6. The side covers 7 extend horizontally towards the clamping mechanism.

[0034] The housing serves as the outer shell of the entire device, providing mounting positions for internal components and protecting them.

[0035] The main housing 6 has a central mounting opening, within which a central shaft 8 is rotatably mounted via bearings. A motor is fixed externally to the mounting opening, providing power to the entire device. The motor's output shaft is connected to and drives the central shaft 8.

[0036] The housing is symmetrically provided with: a side sprocket 10 (rotating component), a transmission sprocket 11, a bearing seat 12, a transmission shaft 13, and a synchronous gear 14.

[0037] The bearing housing 12 is fixed at both ends of the frame 1. The outer end of the drive shaft 13 passes through the bearing housing 12 and is mounted on the bearing housing 12. The drive shaft 13 is rotatably mounted relative to the frame 1 through the bearing housing 12.

[0038] The outer end of the drive shaft 13 is circumferentially fixed to the drive sprocket 11, and the inner end of the drive shaft 13 is connected and fixed to the synchronous gear 14. A gantry frame 16 is fixed in the center of the frame 1. A drive gear 15 is fixed inside the gantry frame 16 and fixed to the inner end of the central shaft 8. Both the drive gear 15 and the synchronous gear 14 are bevel gears, and the drive gear 15 meshes with the synchronous gears 14 on both sides to achieve synchronous drive of the two drive shafts 13 and achieve a high degree of consistency.

[0039] The side sprocket 10 is rotatably fixed to the outer end of the side cover 7. A chain 17 is provided between the side sprocket 10 and the transmission sprocket 11 to drive the side sprocket 10 at both ends to rotate.

[0040] Based on the above structure, the motor located in the middle serves as the power source, and the synchronous drive of the transmission shafts 13 on both sides can be achieved through bevel gears, thereby controlling the rotation of the sprockets 10 at both ends at the same speed.

[0041] The side cover 7 has a circular opening 9 at its outer end away from the main cover 6. A bearing component is installed inside the circular opening 9. The side sprocket 10 is rotatably mounted on the bearing component. A tenon hole 18 passes through the center of the side sprocket 10. The size of the tenon hole 18 corresponds to the square components at both ends of the blowout preventer. Therefore, the side sprocket 10, as a rotating component, can engage with the square components at both ends of the blowout preventer that were originally engaged with the handwheel through the tenon hole 18. After the handwheel is removed, it engages with the side sprocket 10 and is driven to rotate synchronously.

[0042] After using this mechanism, the blowout preventer can be operated electrically. The side sprockets 10 at both ends are driven by the motor to rotate at the same speed, thereby controlling the rotation of the square parts at both ends. This, in turn, controls the two gates on both sides of the blowout preventer to move closer or separate. In particular, during the closing process, it can ensure synchronization and the same speed, avoid eccentricity, and achieve coaxial clamping and sealing of the relative oil pipe parts, completing the blowout prevention operation with high efficiency, high quality, and high safety.

[0043] To ensure complete reliability, two adapters 19 are also included, located outside the side sprockets 10. One end of each adapter 19 has a square groove 20 corresponding to the square parts at both ends of the blowout preventer, and the other end has a square protrusion 21 to increase its protrusion length. This adapter 19 can be inserted into the outside of the square parts that pass through the side sprockets 10, and through the square protrusion 21, it can be further used with other tools (such as wrenches, handwheels, etc.) to allow for manual rotation when the device is damaged or there is no power.

Claims

1. A synchronizing drive mechanism for a blowout preventer, comprising: The rack is fixedly installed on the relative blowout preventer, both ends of the rack are provided with rotating members which are rotatably installed, the central part of the rotating member is provided with a mortise which is inserted with a square piece of the blowout preventer, the rack is provided with transmission shafts which are rotatably installed on the left and right sides of the rack, the transmission shafts are driven by electricity and rotate in the opposite direction at the same speed, and the outer ends of the transmission shafts are mechanically connected with the rotating members in the same direction.

2. The synchronised drive mechanism of a blowout preventer according to claim 1, wherein, The middle part of the rack is fixedly provided with a door-shaped frame, the transmission shafts are symmetrically arranged on the two sides of the door-shaped frame, the middle part of the door-shaped frame is provided with a central shaft which penetrates and is rotatably connected, the central shaft is driven by a motor, the inner end of the central shaft is provided with a driving gear which is arranged in the door-shaped frame, the two sides of the door-shaped frame are symmetrically provided with synchronous gears which are engaged with the driving gear, the synchronous gears and the driving gear are bevel gears, and the synchronous gears are fixedly connected with the inner ends of the transmission shafts.

3. The synchronised drive mechanism of a blowout preventer according to claim 2, wherein, The two ends of the rack are respectively fixedly provided with bearing seats, the outer ends of the transmission shafts are installed on the bearing seats and are rotatably connected with the rack through the bearing seats, and the two sides of the door-shaped frame are symmetrically provided with inner bearings which are installed through the door-shaped frame.

4. The synchronizing drive mechanism of a blowout preventer of claim 1, wherein, The rotating member is a side sprocket, the two ends of the transmission shaft are symmetrically provided with transmission sprockets, and the side sprocket and the transmission sprocket are provided with a chain therebetween.

5. The synchronizing drive mechanism of a blowout preventer of claim 1, wherein, The rack adopts a long rectangular frame structure, the rack is further covered with a shell, the shell comprises a main cover body and a side cover body, the main cover body is a rectangular shell structure which is adapted to the rack, the side surface of the main cover body is provided with a rectangular opening, the rack is fixed at the opening, the side cover body is two groups and is symmetrically fixed at the two ends of the main cover body, and the rotating member is rotatably installed at the end of the side cover body.

6. The synchronised drive mechanism of a blowout preventer according to claim 1, wherein, The rack is symmetrically provided with clamping mechanisms which are used for being fixed on the two sides of the blowout preventer.

7. The synchronised drive mechanism of a blowout preventer according to claim 6, wherein, The clamping mechanism comprises a clamping seat and a clamping block, the clamping seat is fixed on the rack, the side of the clamping seat which is away from the rack is provided with a first arc-shaped groove, the side of the clamping block which is close to the clamping seat is provided with a second arc-shaped groove which is opposite to the first arc-shaped groove, the two sides of the first arc-shaped groove are provided with threaded grooves which are located on the clamping seat, and the two sides of the second arc-shaped groove are provided with fastening bolts which penetrate and are threadedly matched with the second arc-shaped groove.

8. The synchronised drive mechanism of a blowout preventer according to claim 5, wherein, The outer end of the side cover body which is away from the main cover body is provided with a circular opening, the circular opening is provided with a bearing member, the rotating member is a side sprocket and is rotatably installed on the bearing member, the mortise is provided at the center of the side sprocket, the two ends of the transmission shaft are symmetrically provided with transmission sprockets, and the side sprocket and the transmission sprocket are provided with a chain therebetween.

9. The synchronizing drive mechanism of a blowout preventer of claim 1, wherein, Two conversion members which are located outside the side sprocket are further provided, one end of the conversion member is provided with a square groove which corresponds to the square piece of the blowout preventer, and the other end of the conversion member is provided with a square protrusion.

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