Ocean engineering drilling blowout preventer

Abstract

The utility model discloses an ocean engineering well drilling blowout preventer, which relates to the technical field of ocean engineering well drilling, and comprises a fixed plate fixedly connected to the upper part of a blowout preventer body and a fixed frame fixedly connected to the lower part of the blowout preventer body, the fixed plate is provided with a drill rod deviation prevention guide mechanism, and the fixed frame is provided with a wellhead connection reinforcing mechanism. The anti-deviation guide mechanism for the drill rod is arranged, so that the stability of the drill rod in the process of lowering and penetrating into a drilling well can be effectively improved, and the situation that the drill rod shakes and deviates due to the fact that the internal pressure of the drilling well is too large is avoided; the wellhead connecting and reinforcing mechanism is arranged, and two C-shaped locking claws are controlled to be centered and locked to a wellhead through an air cylinder, so that the blowout preventer body can be connected and reinforced after being fixedly mounted, and the dual-guarantee effect is achieved; therefore, the situation that the connection stability of the blowout preventer is seriously affected due to the fact that the flange connection position of the blowout preventer is loosened due to overlarge wellhead oil pressure can be effectively reduced, and stable work of the blowout preventer can be guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of marine engineering drilling technology, and in particular to a blowout preventer for marine engineering drilling. Background Technology

[0002] A blowout preventer (BOP) is a critical piece of equipment used in offshore oil drilling to close the wellhead and prevent blowout accidents. It can quickly seal the wellhead when the pressure of downhole fluids such as high-pressure oil, gas, or water abnormally increases, thus preventing blowouts and protecting the marine environment and drilling operations. However, existing BOPs currently suffer from the following problems in practical applications:

[0003] Firstly, the blowout preventer lacks a drill pipe anti-deviation guidance structure. Therefore, during the process of lowering the drill pipe from inside the blowout preventer into the well for operation, the drill pipe may shake and deviate due to excessive pressure inside the well.

[0004] Secondly, after the blowout preventer is connected to the wellhead via a simple flange, there is a lack of effective reinforcement structure. Excessive oil pressure at the wellhead can easily cause the flange connection of the blowout preventer to loosen, which seriously affects the stability of the blowout preventer connection. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a blowout preventer for marine engineering drilling.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A blowout preventer for marine drilling includes a fixed plate fixedly connected to the upper part of the blowout preventer body and a fixed frame fixedly connected to the lower part of the blowout preventer body. The fixed plate is provided with a drill pipe anti-deviation guiding mechanism, and the fixed frame is provided with a wellhead connection reinforcement mechanism.

[0008] The drill pipe anti-deviation guiding mechanism includes a bidirectional screw, a motor mounting base welded to the side wall of the fixed plate, a servo motor fixed to the side wall of the motor mounting base by bolts, two sliding sleeves symmetrically screwed to the two opposite thread ends of the bidirectional screw, two connecting rods welded to the bottom outer wall of the two sliding sleeves in sequence, two U-shaped frames fixed to the front outer wall of the two connecting rods in sequence, and two guide wheels rotatably installed in the two U-shaped frames in sequence.

[0009] The wellhead connection reinforcement mechanism includes a cylinder fixed to the top outer wall of the fixing frame by bolts, a movable rod fixedly connected to the piston rod of the cylinder, two linkage arms symmetrically hinged to the top of the two movable rods, two connecting rods symmetrically hinged to one end of the two linkage arms, and two C-shaped locking claws symmetrically fixed to the outer wall of the adjacent side of the two connecting rods.

[0010] As a preferred technical solution, the side wall of the fixing plate is fixedly connected to a guide rail, and both sliding sleeves are slidably connected to the guide rail.

[0011] As a preferred technical solution, the side wall of the fixing plate is symmetrically fixed with two bearing seats, and the bidirectional screw is rotatably installed on the two bearing seats. One end of the bidirectional screw is coaxially fixedly connected to one end of the servo motor through a coupling.

[0012] As a preferred technical solution, the top of the fixing frame has two symmetrical sliding openings, and the outer walls of the two connecting rods are slidably connected to the inner walls of the two sliding openings respectively.

[0013] As a preferred technical solution, the top of the fixing frame has two symmetrically opened guide grooves, and the bottom outer wall of the movable rod has two symmetrically welded guide posts.

[0014] As a preferred technical solution, the outer walls of the two guide posts are slidably connected to the inner walls of the two guide grooves, respectively.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. Equipped with a drill pipe anti-deviation guiding mechanism, which uses a servo motor to control two guide wheels to center and move closer together, it can stably guide drill pipes of different specifications, thereby effectively improving the stability of the drill pipe during the drilling process and avoiding the situation of drill pipe shaking and deviation caused by excessive internal drilling pressure.

[0017] 2. A wellhead connection reinforcement mechanism is provided. Two C-shaped locking claws are controlled by a cylinder to lock onto the wellhead. This can reinforce the connection of the blowout preventer body after it is fixedly installed, providing a double protection effect. This can effectively reduce the situation where excessive wellhead oil pressure causes the blowout preventer flange connection to loosen, which seriously affects the connection stability of the blowout preventer and helps to ensure the stable operation of the blowout preventer. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a three-dimensional enlarged structural diagram of the drill pipe anti-deviation guiding mechanism in this utility model;

[0020] Figure 3 This is a three-dimensional enlarged structural diagram of the connection area between the wellhead connection reinforcement mechanism and the fixing frame in this utility model;

[0021] Figure 4 This is a three-dimensional enlarged structural diagram of the wellhead connection reinforcement mechanism in this utility model;

[0022] Figure 5This is a front view structural diagram of the present invention.

[0023] In the diagram: 1. Blowout preventer body; 2. Mounting plate; 3. Mounting bracket; 4. Bidirectional screw; 5. Motor mounting base; 6. Servo motor; 7. Sliding sleeve; 8. Connecting rod; 9. U-shaped frame; 10. Guide wheel; 11. Guide rail; 12. Bearing housing; 13. Cylinder; 14. Movable rod; 15. Linkage arm; 16. Connecting rod; 17. C-type locking claw; 18. Slide opening; 19. Guide groove; 20. Guide column. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Example 1, referring to Figure 1-2 A blowout preventer for marine drilling includes a fixing plate 2 fixedly connected to the upper part of the blowout preventer body 1 and a fixing frame 3 fixedly connected to the lower part of the blowout preventer body 1. The fixing plate 2 is provided with a drill pipe anti-deviation guiding mechanism.

[0026] Specifically, the drill pipe anti-deviation guiding mechanism includes a bidirectional screw 4, a motor mounting base 5 welded to the side wall of the fixed plate 2, a servo motor 6 fixed to the side wall of the motor mounting base 5 by bolts, two sliding sleeves 7 symmetrically screwed to the two opposite thread ends of the bidirectional screw 4, two connecting rods 8 sequentially welded to the bottom outer wall of the two sliding sleeves 7, two U-shaped frames 9 sequentially fixed to the front outer wall of the two connecting rods 8, and two guide wheels 10 sequentially rotatably installed in the two U-shaped frames 9;

[0027] Furthermore, a guide rail 11 is fixedly connected to the side wall of the fixed plate 2, and both sliding sleeves 7 are slidably connected to the guide rail 11. Through the design of the guide rail 11, the stability of the linear movement of the two sliding sleeves 7 can be guaranteed.

[0028] Furthermore, two bearing seats 12 are symmetrically fixed on the side wall of the fixed plate 2. The bidirectional screw 4 is rotatably mounted on the two bearing seats 12. One end of the bidirectional screw 4 is coaxially fixedly connected to one end of the servo motor 6 through a coupling. By setting the connection effect of the two bearing seats 12 and the coupling, it can be ensured that the servo motor 6 controls the stable rotation of the bidirectional screw 4.

[0029] In this embodiment, the servo motor 6 controls the rotation of the bidirectional screw 4. Then, under the guidance of the guide rail 11, the two sliding sleeves 7, which are threadedly connected to the bidirectional screw 4, will drive the two U-shaped frames 9 connected to one end of the two connecting rods 8 to center and move closer together. Then, the two guide wheels 10 installed in the two U-shaped frames 9 can center and move closer together to stably guide drill pipes of different specifications. This can effectively improve the stability of the drill pipe during the drilling process and avoid the situation where the drill pipe shakes and deviates due to excessive internal drilling pressure.

[0030] Example 2, refer to Figure 1 and Figure 3-5 This embodiment is an optimization based on embodiment 1. Specifically, it is: a marine engineering drilling blowout preventer, which also includes a wellhead connection reinforcement mechanism provided on the fixed frame 3;

[0031] Specifically, the wellhead connection reinforcement mechanism includes a cylinder 13 fixed to the top outer wall of the fixed frame 3 by bolts, a movable rod 14 fixedly connected to the piston rod of the cylinder 13, two linkage arms 15 symmetrically hinged to the top of the two movable rods 14, two connecting rods 16 symmetrically hinged to one end of the two linkage arms 15, and two C-shaped locking claws 17 symmetrically fixed to the outer wall of the adjacent side of the two connecting rods 16.

[0032] Furthermore, two sliding openings 18 are symmetrically opened on the top of the fixed frame 3, and the outer walls of the two connecting rods 16 are slidably connected to the inner walls of the two sliding openings 18 respectively. Through the design of the two sliding openings 18, the stability of the left and right linear movement of the two connecting rods 16 can be guaranteed.

[0033] Furthermore, two guide grooves 19 are symmetrically opened on the top of the fixed frame 3, and two guide posts 20 are symmetrically welded to the bottom outer wall of the movable rod 14. The outer walls of the two guide posts 20 are slidably connected to the inner walls of the two guide grooves 19 respectively. Through the guiding cooperation of the two guide grooves 19 and the two guide posts 20, the stability of the linear movement of the movable rod 14 can be guaranteed.

[0034] In this embodiment, after the blowout preventer body 1 is connected to the wellhead via a flange connection, the piston rod of the cylinder 13 can retract to move the movable rod 14 backward. Subsequently, the movable rod 14 will pull the two linkage arms 15 backward, causing the two linkage arms 15 to retract inward. Then, the two connecting rods 16 will drive the two C-shaped locking claws 17 to center and lock onto the wellhead. This can strengthen the connection of the blowout preventer body 1 after fixed installation, providing a double protection effect. This can effectively reduce the situation where excessive wellhead oil pressure causes the blowout preventer flange connection to loosen, seriously affecting the stability of the blowout preventer connection, and is conducive to ensuring the stable operation of the blowout preventer.

[0035] Working principle: First, during the installation phase, after the blowout preventer body 1 is connected to the wellhead via a flange connection, the piston rod of cylinder 13 retracts to move the movable rod 14 backward. Subsequently, the movable rod 14 pulls the two linkage arms 15 backward, causing the two linkage arms 15 to retract inward. Then, the two connecting rods 16 drive the two C-type locking claws 17 to center and lock onto the wellhead. This can strengthen the connection of the blowout preventer body 1 after fixed installation, providing a double protection effect. This can effectively reduce the situation where excessive wellhead oil pressure causes the blowout preventer flange connection to loosen, seriously affecting the connection stability of the blowout preventer, and is conducive to ensuring the stable operation of the blowout preventer.

[0036] Secondly, during the working phase, the servo motor 6 controls the rotation of the bidirectional screw 4. Then, under the guidance of the guide rail 11, the two sliding sleeves 7, which are threadedly connected to the bidirectional screw 4, will drive the two U-shaped frames 9 connected to one end of the two connecting rods 8 to center and move closer together. Then, the two guide wheels 10 installed in the two U-shaped frames 9 can center and move closer together to stably guide drill pipes of different specifications. This can effectively improve the stability of the drill pipe during the drilling process and avoid the situation of drill pipe shaking and deviation caused by excessive internal drilling pressure.

[0037] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A blowout preventer for marine drilling, comprising a fixing plate (2) fixedly connected to the upper part of the blowout preventer body (1) and a fixing frame (3) fixedly connected to the lower part of the blowout preventer body (1), characterized in that, The fixed plate (2) is provided with a drill pipe anti-deviation guiding mechanism, and the fixed frame (3) is provided with a wellhead connection reinforcement mechanism; The drill rod anti-deviation guiding mechanism includes a bidirectional screw (4), a motor mounting base (5) welded to the side wall of the fixed plate (2), a servo motor (6) fixed to the side wall of the motor mounting base (5) by bolts, two sliding sleeves (7) symmetrically screwed to the two opposite thread ends of the bidirectional screw (4), two connecting rods (8) welded to the bottom outer wall of the two sliding sleeves (7) in sequence, two U-shaped frames (9) fixed to the front outer wall of the two connecting rods (8) in sequence, and two guide wheels (10) rotatably installed in the two U-shaped frames (9); The wellhead connection reinforcement mechanism includes a cylinder (13) fixed to the top outer wall of the fixed frame (3) by bolts, a movable rod (14) fixedly connected to the piston rod of the cylinder (13), two linkage arms (15) symmetrically hinged to the top of the two movable rods (14), two connecting rods (16) symmetrically hinged to one end of the two linkage arms (15), and two C-shaped locking claws (17) symmetrically fixed to the outer wall of the adjacent side of the two connecting rods (16).

2. The marine engineering drilling blowout preventer according to claim 1, characterized in that, The side wall of the fixed plate (2) is fixedly connected to the guide rail (11), and both sliding sleeves (7) are slidably connected to the guide rail (11).

3. The marine engineering drilling blowout preventer according to claim 1, characterized in that, The side wall of the fixed plate (2) is symmetrically fixed with two bearing seats (12), and the bidirectional screw (4) is rotatably installed on the two bearing seats (12), and one end of the bidirectional screw (4) is coaxially fixedly connected to one end of the servo motor (6) through a coupling.

4. A blowout preventer for marine engineering drilling according to claim 1, characterized in that, The top of the fixing frame (3) has two symmetrical sliding openings (18), and the outer walls of the two connecting rods (16) are slidably connected to the inner walls of the two sliding openings (18).

5. A blowout preventer for marine engineering drilling according to claim 1, characterized in that, The top of the fixed frame (3) has two symmetrically opened guide grooves (19), and the bottom outer wall of the movable rod (14) has two symmetrically welded guide posts (20).

6. A blowout preventer for marine engineering drilling according to claim 5, characterized in that, The outer walls of the two guide posts (20) are slidably connected to the inner walls of the two guide grooves (19).

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