Blowout preventer for submarine oil and gas exploitation

Abstract

The utility model discloses a blowout preventer for submarine oil and gas exploitation, which comprises a blowout preventer body and a sucker rod, two cavities are arranged in the blowout preventer body and are communicated with each other, a hollow pipe is arranged at the center of the blowout preventer, the sucker rod penetrates through the blowout preventer body, and the blowout preventer further comprises a sealing blowout prevention assembly. The sealing blowout prevention assembly is arranged in the blowout preventer body. The utility model belongs to the technical field of oil and gas exploitation, and particularly relates to a blowout preventer for seabed oil and gas exploitation, which solves the problem that energy loss is increased when two groups of hydraulic mechanisms work a sucker rod.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil and gas exploitation, and particularly relates to a blowout preventer for subsea oil and gas exploitation. Background Technique

[0002] A blowout preventer is a protective device used for oil and gas exploitation. During the process of drilling for oil, since the pressures of fluids such as oil, natural gas, and water in the underground oil layer are greater than the well pressure, therefore, it is necessary to use a blowout preventer to act on the wellhead and close the wellhead during operations such as well testing, well workover, and well completion to prevent fluids such as oil, natural gas, and water in the underground oil layer from spraying out of the well under pressure, causing a blowout accident.

[0003] A blowout preventer for subsea oil and gas exploitation provided in the publication number CN10993102B acts on the device through two sets of hydraulic mechanisms, controls the symmetrical push rods to move towards the middle, and uses a transmission mechanism to drive, controls the gate body to move horizontally first, and after the two gate bodies come into contact, then uses a linkage rod to control the bracket to move upward, so that the top sealing colloid closely adheres to the inner wall of the blowout preventer body for sealing. However, this process uses two sets of hydraulic mechanisms to work, greatly increasing the energy consumption. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is that two sets of hydraulic mechanisms work on the sucker rod, resulting in increased energy consumption.

[0005] To solve the above technical problem, the technical scheme adopted by the utility model is as follows: a blowout preventer for subsea oil and gas exploitation, including a blowout preventer body and a sucker rod. There are two cavities inside the blowout preventer body and they are communicated. The center of the blowout preventer is provided with a hollow pipe. The sucker rod penetrates through the blowout preventer body. It also includes a sealing and blowout prevention component, and the sealing and blowout prevention component is arranged inside the blowout preventer body and is used for sealing the outside of the sucker rod.

[0006] Further, the sealing and blowout prevention component includes a rotating shaft, a second pulley, a worm, a worm gear, a sleeve, a first pulley, a transmission belt, an adjusting column, a gate, and a sealing colloid, where:

[0007] The rotating shaft is rotatably connected between the inner walls of the blowout preventer body. The second pulley is fixedly connected to both ends of the rotating shaft. A servo motor is fixedly installed inside the blowout preventer body. The worm is fixedly connected to the output end of the servo motor. The worm gear is fixedly connected to the rotating shaft. The worm and the worm gear are meshed with each other;

[0008] The sleeve is rotatably connected to the inner wall of the blowout preventer body and is symmetrically distributed. The first pulley is fixedly connected to the outer wall of the sleeve. The transmission belt is connected between the first pulley and the second pulley. The adjusting column is threadedly connected to the sleeve, and one end thereof extends outside the sleeve. The gate is provided on one side of the adjusting column, and the sealing colloid is fixedly connected to the gate.

[0009] Furthermore, the sealing blowout prevention assembly further includes a connecting plate, a buffer cylinder, a buffer column and a spring, wherein:

[0010] The connecting plate is fixedly connected to the free end of the adjusting column. The buffer cylinder is fixedly connected to the outer wall of the connecting plate and is symmetrically distributed. The buffer column is slidably arranged in the buffer cylinder, and its free end is fixedly connected to the gate. The spring is fixedly connected between the inner wall of the buffer cylinder and the buffer column.

[0011] Furthermore, the gate is provided with symmetrically distributed limit blocks, and the inner part of the blowout preventer body is provided with limit grooves, and the limit blocks are slidably arranged inside the limit grooves.

[0012] Furthermore, the gate is arc-shaped, and the buffer column is T-shaped.

[0013] Furthermore, the diameter of the first pulley is larger than the diameter of the second pulley.

[0014] After adopting the above structure, the beneficial effects of the present utility model are as follows:

[0015] (1) By the rotation of the worm and the worm wheel, the two second pulleys can drive the sleeve on the first pulley to rotate, and then the connecting plate at the end of the adjusting column moves under the limiting and guiding action of the limit blocks and the limit grooves, replacing the use of a hydraulic rod;

[0016] (2) After the gate moves, it closely adheres to the outer wall of the sucker rod, and effective sealing treatment is carried out on it through the sealing colloid. During the process, the gate can elastically clamp the production tubing through the deformation of the spring, avoiding deformation caused by hard clamping. Description of the Drawings

[0017] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model and do not constitute a limitation to the present utility model.

[0018] Figure 1 It is a schematic diagram of the overall structure of a blowout preventer for offshore oil and gas production proposed by the present utility model;

[0019] Figure 2 It is a half-sectional view of a blowout preventer for offshore oil and gas production proposed by the present utility model;

[0020] Figure 3 A cross-sectional view of a blowout preventer for undersea oil and gas production proposed by the present utility model;

[0021] Figure 4 Another plane cross-sectional view of a blowout preventer for undersea oil and gas production proposed by the present utility model;

[0022] Figure 5 A sectional view of a blowout preventer for undersea oil and gas production proposed by the present utility model;

[0023] Figure 6 It is Figure 2 An enlarged schematic view of part A in

[0024] Figure 7 It is Figure 3 An enlarged schematic view of part B in

[0025] In the attached drawings: 1. Blowout preventer body, 2. Sucker rod, 3. Rotating shaft, 4. Second pulley, 5. Worm, 6. Worm gear, 7. Sleeve, 8. First pulley, 9. Transmission belt, 10. Adjusting column, 11. Ram, 12. Sealing colloid, 13. Servo motor, 14. Connecting plate, 15. Buffer cylinder, 16. Buffer column, 17. Spring, 18. Limiting block, 19. Limiting groove. Specific embodiments

[0026] As Figure 1-2 shown, a blowout preventer for undersea oil and gas production includes a blowout preventer body 1 and a sucker rod 2. There are two cavities inside the blowout preventer body 1, and they are communicated with each other. The center of the blowout preventer is provided with a hollow pipe. The sucker rod 2 penetrates through the blowout preventer body 1, and it also includes a sealing and blowout prevention component, which is arranged inside the blowout preventer body 1.

[0027] The outer side of the sucker rod 2 is sealed by the sealing and blowout prevention component.

[0028] As Figure 1-7 shown, in order to solve the problem of more energy consumption when multiple hydraulic mechanisms work on the sucker rod 2, the sealing and blowout prevention component includes a rotating shaft 3, a second pulley 4, a worm 5, a worm gear 6, a sleeve 7, a first pulley 8, a transmission belt 9, an adjusting column 10, a ram 11, a sealing colloid 12, a connecting plate 14, a buffer cylinder 15, a buffer column 16 and a spring 17. The rotating shaft 3 is rotatably connected between the inner walls of the blowout preventer body 1. The second pulley 4 is fixedly connected to both ends of the rotating shaft 3. A servo motor 13 is fixedly installed inside the blowout preventer body 1. The worm 5 is fixedly connected to the output end of the servo motor 13. The worm gear 6 is fixedly connected to the rotating shaft 3. The worm 5 and the worm gear 6 are meshed with each other;

[0029] The sleeve 7 is rotatably connected to the inner wall of the blowout preventer body 1 and is symmetrically distributed. The first pulley 8 is fixedly connected to the outer wall of the sleeve 7. The transmission belt 9 is connected between the first pulley 8 and the second pulley 4. The adjusting column 10 is threadedly connected to the sleeve 7, and one end thereof extends outside the sleeve 7. The gate 11 is provided on one side of the adjusting column 10. The sealing colloid 12 is fixedly connected to the gate 11.

[0030] The connecting plate 14 is fixedly connected to the free end of the adjusting column 10. The buffer cylinder 15 is fixedly connected to the outer wall of the connecting plate 14 and is symmetrically distributed. The buffer column 16 is slidably arranged in the buffer column 16, and its free end is fixedly connected to the gate 11. The spring 17 is fixedly connected between the inner wall of the buffer cylinder 15 and the buffer column 16.

[0031] As Figure 2-6 shown, in order to realize the moving range of the gate 11, symmetrically distributed limit blocks 18 are provided on the gate 11, and limit grooves 19 are provided inside the blowout preventer body 1. The limit blocks 18 are slidably arranged inside the limit grooves 19.

[0032] Among them, the gate 11 is arc-shaped, the buffer column 16 is T-shaped, and the diameter of the first pulley 8 is larger than the diameter of the second pulley 4.

[0033] During specific use, the servo motor 13 is turned on. The rotation of the worm 5 causes the worm wheel 6 to drive the rotating shaft 3 to rotate at a constant speed. Furthermore, the two second pulleys 4 can drive the sleeves 7 on the corresponding first pulleys 8 to rotate. Under the limiting and guiding action of the limit blocks 18 and the limit grooves 19, the adjusting column 10 moves horizontally. The connecting plate 14 at the end of the adjusting column 10 drives the gate 11 to move until the sealing colloid 12 clamps the sucker rod 2. The use of a hydraulic rod is replaced. During the movement of the gate 11, the gate 11 can elastically clamp the tubing through the deformation of the spring 17, avoiding deformation caused by hard clamping.

[0034] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents. All in all, if those of ordinary skill in the art are inspired by it and design similar structural methods and embodiments without creative efforts without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A blowout preventer for undersea oil and gas production, comprising a blowout preventer body and a sucker rod. There are two cavities inside the blowout preventer body, and they are communicated with each other. The center of the blowout preventer is provided with a hollow pipe. The sucker rod penetrates through the blowout preventer body. It is characterized in that: It further includes a sealing blowout preventer assembly, which is arranged inside the blowout preventer body and is used for sealing the outer side of the sucker rod.

2. The blowout preventer for subsea oil and gas production according to claim 1, characterized in that: The sealing blowout preventer assembly includes a rotating shaft, a second pulley, a worm, a worm gear, a sleeve, a first pulley, a transmission belt, an adjusting column, a gate plate and a sealing colloid, wherein: The rotating shaft is rotatably connected between the inner walls of the blowout preventer body, the second pulley is fixedly connected to both ends of the rotating shaft, a servo motor is fixedly installed inside the blowout preventer body, the worm is fixedly connected to the output end of the servo motor, the worm gear is fixedly connected to the rotating shaft, and the worm and the worm gear are meshed with each other; The sleeve is rotatably connected to the inner wall of the blowout preventer body and is symmetrically distributed. The first pulley is fixedly connected to the outer wall of the sleeve. The transmission belt is connected between the first pulley and the second pulley. The adjusting column is threadedly connected to the sleeve and one end of it extends outside the sleeve. The gate plate is arranged on one side of the adjusting column, and the sealing colloid is fixedly connected to the gate plate.

3. The blowout preventer for undersea oil and gas exploitation according to claim 2, wherein: The sealing blowout preventer assembly further includes a connecting plate, a buffer cylinder, a buffer column and a spring, wherein: The connecting plate is fixedly connected to the free end of the adjusting column. The buffer cylinder is fixedly connected to the outer wall of the connecting plate and is symmetrically distributed. The buffer column is slidably arranged in the buffer cylinder and its free end is fixedly connected to the gate plate. The spring is fixedly connected between the inner wall of the buffer cylinder and the buffer column.

4. The blowout preventer for subsea oil and gas production according to claim 3, characterized in that: Symmetrically distributed limit blocks are arranged on the gate plate, and limit grooves are arranged inside the blowout preventer body. The limit blocks are slidably arranged inside the limit grooves.

5. The blowout preventer for undersea oil and gas exploitation according to claim 4, wherein: The gate plate is arc-shaped, and the buffer column is T-shaped.

6. The blowout preventer for undersea oil and gas exploitation according to claim 5, characterized in that: The diameter of the first pulley is larger than that of the second pulley.

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