Hydraulic lock device for automatic opening of annular preventer against pipe explosion

Abstract

The application relates to a hydraulic lock device for automatically opening a ring-shaped blowout preventer to prevent rubber pipe explosion, and relates to the field of hydraulic lock devices. The device comprises a main operating table and a ring-shaped blowout preventer. A pressure gauge and a stop valve are installed on the main operating table. A one-way hydraulic lock is installed on the ring-shaped blowout preventer. The one-way hydraulic lock comprises a valve body, a valve core and a control piston. The valve core and the control piston are arranged on the two sides of the valve body, and the valve core and the control piston are in sealed sliding connection with the valve body. The application can automatically open the ring-shaped blowout preventer when the hydraulic rubber pipe explodes, avoids the situation that the ring-shaped blowout preventer cannot normally work due to the rubber pipe explosion, prevents high-pressure fluid in the well from being sprayed out, and guarantees the safety of personnel and equipment in the oil exploitation process. The one-way hydraulic lock is designed in a reasonable structure and is sealed, the sealing property and the stability of the device are guaranteed, the risk of hydraulic oil leakage and part damage is reduced, and the reliability and the service life of the device are improved.

Description

Technical Field

[0001] This application relates to the technical field of hydraulic lock devices, and in particular to a hydraulic lock device that automatically opens when the rubber hose of a blowout preventer bursts. Background Technology

[0002] Annular blowout preventers (BOPs) are critical well control devices in oil drilling, used to seal the wellhead in emergencies and prevent blowouts. Currently, the hydraulic control system of annular BOPs typically uses multi-way valves and supply lines for on / off control.

[0003] However, existing annular blowout preventers (BOPs) lack an effective one-way protection mechanism in their shut-off circuit. When the oil supply line ruptures, the shut-off circuit depressurizes, causing the BOP to open unexpectedly, posing a significant safety hazard. In recent years, with increasing drilling depth and more complex operating environments, higher requirements have been placed on the reliability and safety of annular BOPs. Utility Model Content

[0004] To ensure the safe use of the annular blowout preventer's rubber hose, this application provides a hydraulic lock device that automatically opens when the annular blowout preventer's rubber hose bursts.

[0005] The hydraulic lock device for automatic opening in the event of a blowout preventer hose rupture, as provided in this application, adopts the following technical solution: A hydraulic lock device for automatically opening the anti-burst hose of an annular blowout preventer includes a main control panel and an annular blowout preventer. The main control panel is equipped with a pressure gauge and a shut-off valve. A one-way hydraulic lock is installed on the annular blowout preventer's shut-off port. The one-way hydraulic lock includes a valve body, a valve core, and a control piston. The valve core and the control piston are located on opposite sides of the valve body and are both slidably and sealingly connected to the valve body. A first cover and a second cover are respectively installed on the left and right sides of the valve body. Both the first cover and the second cover are detachably and fixedly connected to the valve body.

[0006] By adopting the above technical solution, a small shut-off valve and pressure gauge are installed on the main control panel. This shut-off valve is normally kept closed. When a slight pressure release is needed in the annular shut-off chamber, observe the pressure gauge, slowly loosen the shut-off valve to release pressure to the desired value, and then immediately close the shut-off valve. A one-way hydraulic lock is installed on the annular blowout preventer (BOP) port, and the control port of the hydraulic lock is connected to the open position oil circuit. When the annular BOP is closed, the hydraulic lock check valve is normally open. When the annular port is opened, the high-pressure control oil in the open position opens the hydraulic lock, and the oil circuit in the closed position returns oil normally. When the annular BOP is in the closed position, and all oil supply hoses from the power source to the main unit and all the way to the annular shut-off port are damaged and depressurized, the high-pressure oil in the annular shut-off chamber will not depressurize due to the protection of the hydraulic lock, and the annular port will not automatically open due to hose rupture. The first and second covers are detachably and fixedly connected to the valve body, facilitating the inspection and maintenance of the valve core and control piston inside the one-way hydraulic lock.

[0007] Optionally, a central sliding groove is provided in the middle of the valve body, and piston grooves and core sliding grooves are respectively provided on the left and right sides of the central sliding groove, and the piston grooves and core sliding grooves are connected to the central sliding groove.

[0008] By adopting the above technical solution, the central sliding groove in the middle of the valve body, as well as the piston grooves and core sliding grooves on the left and right sides, provide sliding space for the valve core and control piston, allowing them to move flexibly under the action of hydraulic oil and realize the function of one-way hydraulic lock. At the same time, these sliding grooves are interconnected, ensuring the normal flow of hydraulic oil inside the valve body and ensuring the normal operation of the device.

[0009] Optionally, the lower end of the valve body is integrally formed with a control oil pipe, a forward oil pipe, and a reverse oil pipe. The control oil pipe is connected to the core groove, the forward oil pipe is connected to the middle groove, and the reverse oil pipe is connected to the piston groove.

[0010] By adopting the above technical solution, the control oil pipe, forward oil pipe, and reverse oil pipe, integrally formed at the lower end of the valve body, are connected to the core slide groove, the middle slide groove, and the piston groove, respectively, providing channels for the input and output of hydraulic oil. The control oil pipe is used to input hydraulic oil into the core slide groove, driving the valve core to move; the forward oil pipe is used to input hydraulic oil into the middle slide groove; and the reverse oil pipe is used to input hydraulic oil into the piston groove.

[0011] Optionally, the valve core includes a core body, a core head, and a stepped tail seat, wherein the core head and the stepped tail seat are disposed at both ends of the core body, and the core body, the core head, and the stepped tail seat are integrally formed.

[0012] By adopting the above technical solution, the valve core features an integrally molded structure comprising the core body, core head, and stepped tailstock, ensuring the overall strength and stability of the valve core. The core head and stepped tailstock are located at opposite ends of the core body, allowing for better engagement with the internal grooves of the valve body, achieving both sealing and sliding functions. The integrally molded structure also reduces the number of connections between parts, lowers the risk of leakage, and improves the reliability of the device.

[0013] Optionally, a sealing ring groove is provided on the outer surface of both the core head and the stepped tailstock, and a sealing ring is fitted and fixed in the sealing ring groove.

[0014] By adopting the above technical solution, the sealing ring grooves opened on the outer surfaces of the valve core and the stepped tailstock, and the structure with a fixed sealing ring, can effectively prevent hydraulic oil leakage between the valve core and the valve body, ensuring the sealing performance of the hydraulic system. Good sealing performance helps improve the working efficiency of the device, reduces hydraulic oil waste, and also avoids environmental pollution and safety hazards caused by hydraulic oil leakage.

[0015] Optionally, the control piston includes a sealing disc, a piston slide rod, and a pusher head. The sealing disc is fixedly installed at one end of the piston slide rod, and the pusher head is threadedly connected to the other end of the piston slide rod.

[0016] By adopting the above technical solution, the sealing disc of the control piston can prevent hydraulic oil from leaking from the piston groove, ensuring the sealing performance of the hydraulic system. The piston slide rod provides support and guidance for the movement of the control piston, allowing it to slide smoothly within the piston groove. The pusher is threadedly connected to the other end of the piston slide rod, facilitating adjustment of the pusher's position to adapt to different working requirements.

[0017] Optionally, the first cover includes an outer cover plate and a limiting post. The limiting post is evenly installed on the inner side of the outer cover plate along the circumferential direction, and one end of the limiting post is fixedly connected to the outer cover plate, while a buffer pad is fixedly installed on the other end of the limiting post.

[0018] By adopting the above technical solution, the outer cover plate of the first cap protects the internal structure of the valve body. The limiting posts are evenly installed on the inner side of the outer cover plate along the circumference, which can limit the movement of the control piston and prevent excessive movement of the control piston from damaging the internal structure of the valve body. The buffer pad at the other end of the limiting post can buffer the impact when the control piston contacts the limiting post, reduce the impact force, and extend the service life of the device.

[0019] Optionally, the second cover includes an outer sealing plate, a first support spring, and a second support spring. One end of the first support spring and the second support spring are both fixed to the inner side of the outer sealing plate, and the other end of the first support spring and the second support spring are both connected to the stepped tail seat.

[0020] By adopting the above technical solution, the outer sealing plate of the second cover functions to seal the valve body. One end of the first and second support springs is fixed to the inner side of the outer sealing plate, and the other end is connected to the stepped tail seat, which can provide elastic support for the valve core, allowing the valve core to move smoothly under the action of hydraulic oil. At the same time, the elastic force of the springs can also assist the valve core to move quickly when the hydraulic hose bursts, realizing the automatic opening of the annular blowout preventer.

[0021] In summary, this application includes at least one of the following beneficial technical effects: This application can automatically open the annular blowout preventer (BOP) in the event of a hydraulic hose rupture, preventing the BOP from malfunctioning due to hose rupture, preventing high-pressure fluid from gushing out of the well, and ensuring the safety of personnel and equipment during oil extraction. Furthermore, the one-way hydraulic lock, through its reasonable structural design and sealing measures, ensures the sealing and stability of the device, reduces the risk of hydraulic oil leakage and component damage, and improves the reliability and service life of the device. Simultaneously, the detachable and fixed connection between the first and second caps and the valve body facilitates the inspection and maintenance of the valve core and control piston inside the one-way hydraulic lock, reducing equipment maintenance costs and downtime. Attached Figure Description

[0022] Figure 1 The overall structure in the embodiments of this application is in the oil drilling equipment.

[0023] Figure 2 This is a perspective view of the one-way hydraulic lock, the first cover, and the second cover in cooperation in the embodiments of this application.

[0024] Figure 3 yes Figure 2 A cross-sectional view of the device shown.

[0025] Figure 4 This is a cross-sectional view of the valve body in an embodiment of this application.

[0026] Figure 5 This is a perspective view of the valve core in the embodiments of this application.

[0027] Figure 6 This is a perspective view of the control piston in an embodiment of this application.

[0028] Explanation of reference numerals in the attached drawings: 1. Pressure gauge; 2. Shut-off valve; 3. One-way hydraulic lock; 301. Middle groove; 302. Piston groove; 303. Core groove; 31. Valve body; 311. Control oil pipe; 312. Forward end oil pipe; 313. Reverse end oil pipe; 32. Valve core; 321. Core part; 322. Core head; 323. Stepped tailstock; 324. Sealing ring groove; 33. Control piston; 331. Sealing disc; 332. Piston slide rod; 333. Push head; 4. First cover; 41. Outer cover plate; 42. Limiting post; 421. Buffer pad; 5. Second cover; 51. Outer sealing plate; 52. First support spring; 53. Second support spring. Detailed Implementation

[0029] The present application will be further described in detail below with reference to the accompanying drawings.

[0030] This application discloses a hydraulic lock device for automatically opening when the rubber hose of a blowout preventer ruptures. (See also...) Figure 1 , Figure 2 and Figure 3 A hydraulic lock device for automatically opening the annular blowout preventer (BOP) hose in case of bursting includes a main control panel and an annular BOP. A pressure gauge 1 and a shut-off valve 2 are installed on the main control panel. A one-way hydraulic lock 3 is installed on the annular BOP's closing port. The one-way hydraulic lock 3 includes a valve body 31, a valve core 32, and a control piston 33. The valve core 32 and control piston 33 are located on opposite sides of the valve body 31 and are both slidably and sealingly connected to the valve body 31. A first cover 4 and a second cover 5 are installed on the left and right sides of the valve body 31, respectively, and both are detachably and fixedly connected to the valve body 31. A small shut-off valve 2 and a pressure gauge 1 are installed on the main control panel. This shut-off valve 2 is normally kept closed. When a slight pressure release is needed in the annular closing chamber, the pressure gauge 1 is observed, and the shut-off valve 2 is slowly loosened to release the pressure to the desired value before immediately closing it again. A one-way hydraulic lock 3 is installed on the annular BOP's closing port, and the control port of the hydraulic lock is connected to the open position oil circuit. When the annular blowout preventer is closed, the hydraulic lock check valve opens normally. When the annular circuit opens, the high-pressure control oil in the open position opens the hydraulic lock, and the oil circuit in the closed position returns oil normally. When the annular blowout preventer is in the closed position and all oil supply hoses from the power source to the main unit, all the way to the annular closing port, are damaged and depressurized, the high-pressure oil in the annular closing chamber will not depressurize due to the protection of the hydraulic lock, and the annular circuit will not open automatically due to hose rupture. The first cover 4 and the second cover 5 are detachably and fixedly connected to the valve body 31, facilitating the inspection and maintenance of the valve core 32 and control piston 33 inside the one-way hydraulic lock 3.

[0031] Reference Figure 3 and Figure 4A central sliding groove 301 is provided in the middle of the valve body 31. A piston groove 302 and a core sliding groove 303 are respectively provided on the left and right sides of the central sliding groove 301, and both the piston groove 302 and the core sliding groove 303 are connected to the central sliding groove 301. The central sliding groove 301 in the middle of the valve body 31, as well as the piston grooves 302 and core sliding grooves 303 on the left and right sides, provide sliding space for the valve core 32 and the control piston 33, allowing them to move flexibly under the action of hydraulic oil, thus realizing the function of the one-way hydraulic lock 3. At the same time, these grooves are interconnected, ensuring the normal flow of hydraulic oil inside the valve body 31 and ensuring the normal operation of the device. The lower end of the valve body 31 is integrally formed with a control oil pipe 311, a forward oil pipe 312, and a reverse oil pipe 313. The control oil pipe 311 is connected to the core slide groove 303, the forward oil pipe 312 is connected to the middle slide groove 301, and the reverse oil pipe 313 is connected to the piston groove 302. By adopting the above technical solution, the control oil pipe 311, the forward oil pipe 312, and the reverse oil pipe 313 integrally formed at the lower end of the valve body 31 are connected to the core slide groove 303, the middle slide groove 301, and the piston groove 302, respectively, providing channels for the input and output of hydraulic oil. The control oil pipe 311 is used to input hydraulic oil into the core slide groove 303 to push the valve core 32 to move; the forward oil pipe 312 is used to input hydraulic oil into the middle slide groove 301; and the reverse oil pipe 313 is used to input hydraulic oil into the piston groove 302. A one-way valve structure is formed between the forward end oil pipe 312 and the reverse end oil pipe 313. When the control oil pipe 311 is not supplied with pressure oil, the oil can only flow from the forward end oil pipe 312 to the reverse end oil pipe 313. When the control oil pipe 311 is supplied with pressure oil, the valve core 32 can be pushed open by the control piston 33, and the forward end oil pipe 312 and the reverse end oil pipe 313 can be connected to each other.

[0032] Reference Figure 3 and Figure 5The valve core 32 includes a core body 321, a core head 322, and a stepped tail seat 323. The core head 322 and the stepped tail seat 323 are located at both ends of the core body 321, and are integrally formed. This integrally formed structure ensures the overall strength and stability of the valve core 32. The core head 322 and the stepped tail seat 323 are located at both ends of the core body 321, allowing for better engagement with the internal grooves of the valve body 31, achieving both sealing and sliding functions. The integrally formed structure also reduces the number of connections between parts, lowers the risk of leakage, and improves the reliability of the device. Sealing ring grooves 324 are provided on the outer surfaces of both the core head 322 and the stepped tail seat 323, and sealing rings are fixedly fitted into these grooves. The sealing ring groove 324 formed on the outer surface of the valve core 322 and the stepped tailstock 323, and fitted with a sealing ring, effectively prevents hydraulic oil leakage between the valve core 32 and the valve body 31, ensuring the sealing performance of the hydraulic system. Good sealing performance helps improve the working efficiency of the device, reduces hydraulic oil waste, and also avoids environmental pollution and safety hazards caused by hydraulic oil leakage.

[0033] Reference Figure 3 and Figure 6 The control piston 33 includes a sealing disc 331, a piston slide rod 332, and a pusher head 333. The sealing disc 331 is fixedly installed at one end of the piston slide rod 332, and the pusher head 333 is threadedly connected to the other end of the piston slide rod 332. The sealing disc 331 of the control piston 33 prevents hydraulic oil from leaking from the piston groove 302, ensuring the sealing performance of the hydraulic system. The piston slide rod 332 provides support and guidance for the movement of the control piston 33, allowing the control piston 33 to slide smoothly within the piston groove 302. The pusher head 333 is threadedly connected to the other end of the piston slide rod 332, facilitating adjustment of the pusher head 333's position to adapt to different working requirements.

[0034] Reference Figure 2 and Figure 3The first cover 4 includes an outer cover plate 41 and limiting posts 42. The limiting posts 42 are evenly installed on the inner side of the outer cover plate 41 along the circumferential direction, and one end of the limiting post 42 is fixedly connected to the outer cover plate 41, while a buffer pad 421 is fixedly installed on the other end of the limiting post 42. The outer cover plate 41 of the first cover 4 protects the internal structure of the valve body 31. The limiting posts 42, evenly installed on the inner side of the outer cover plate 41 along the circumferential direction, limit the movement of the control piston 33, preventing excessive movement of the control piston 33 and damage to the internal structure of the valve body 31. The buffer pad 421 at the other end of the limiting post 42 provides a buffering effect when the control piston 33 contacts the limiting post 42, reducing impact force and extending the service life of the device. The second cover 5 includes an outer cover plate 51, a first support spring 52, and a second support spring 53. One end of each of the first and second support springs 52 and 53 is fixed to the inner side of the outer cover plate 51, and the other end of each is connected to the stepped tail seat 323. The outer cover plate 51 of the second cover 5 serves to seal the valve body 31. The first and second support springs 52 and 53, with one end fixed to the inner side of the outer cover plate 51 and the other end connected to the stepped tail seat 323, provide elastic support for the valve core 32, allowing it to move smoothly under the action of hydraulic oil. Simultaneously, the elastic force of the springs can also assist the valve core 32 in moving quickly when the hydraulic hose bursts, achieving automatic opening of the annular blowout preventer. The design of two sets of springs also reduces the equipment failure rate.

[0035] The implementation principle of the hydraulic lock device for automatic opening of the annular blowout preventer's hose bursting according to an embodiment of this application is as follows: The well control device in the overall oil drilling equipment mainly includes a hydraulic lock assembly, a control circuit assembly, and a main control panel assembly. The one-way valve part of the hydraulic lock assembly is installed on the closed position oil circuit of the annular blowout preventer, and the control oil pipe 311 is connected to the open position oil circuit. The control circuit assembly includes an oil supply hose and a multi-way valve, with the oil supply hose connecting the power source to the inlet of the multi-way valve. A shut-off valve 2 and a pressure gauge 1 are installed on the main control panel assembly. The shut-off valve 2 is installed on the closed position oil circuit of the annular blowout preventer, and the pressure gauge 1 is used to monitor the oil circuit pressure.

[0036] When the annular blowout preventer is closed, the hydraulic lock check valve opens normally, allowing high-pressure oil to enter the closed-position oil circuit. When the open-position oil circuit is pressurized, the hydraulic lock control port receives a high-pressure signal, opens the check valve, and oil returns from the closed-position oil circuit. When the oil supply line is damaged, the hydraulic lock check valve automatically closes, preventing pressure relief in the closed-position oil circuit. Thus, when the annular blowout preventer is in the closed position and all oil supply hoses from the power source to the main unit, all the way to the annular closing port, are damaged and depressurized, the high-pressure oil in the annular closing chamber will not be depressurized due to the hydraulic lock protection, and the annular circuit will not automatically open due to hose rupture.

[0037] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A hydraulic locking device for automatically opening the annular blowout preventer hose in case of bursting, comprising a main control panel and an annular blowout preventer, characterized in that: A pressure gauge (1) and a shut-off valve (2) are installed on the main control panel. A one-way hydraulic lock (3) is installed on the annular blowout preventer. The one-way hydraulic lock (3) includes a valve body (31), a valve core (32), and a control piston (33). The valve core (32) and the control piston (33) are respectively located on both sides of the valve body (31), and both the valve core (32) and the control piston (33) are sealed and slidably connected to the valve body (31). A first cover (4) and a second cover (5) are respectively installed on the left and right sides of the valve body (31). The first cover (4) and the second cover (5) are detachably and fixedly connected to the valve body (31).

2. The hydraulic lock device for automatic opening of the annular blowout preventer hose bursting according to claim 1, characterized in that: The valve body (31) has a central slide groove (301) in the middle. The left and right sides of the central slide groove (301) are respectively provided with piston groove (302) and core slide groove (303). The piston groove (302) and core slide groove (303) are connected to the central slide groove (301).

3. The hydraulic lock device for automatic opening of the annular blowout preventer hose bursting according to claim 2, characterized in that: The lower end of the valve body (31) is integrally formed with a control oil pipe (311), a forward oil pipe (312) and a reverse oil pipe (313). The control oil pipe (311) is connected to the core slide groove (303), the forward oil pipe (312) is connected to the middle slide groove (301), and the reverse oil pipe (313) is connected to the piston groove (302).

4. The hydraulic lock device for automatic opening of the annular blowout preventer hose bursting according to claim 3, characterized in that: The valve core (32) includes a core body (321), a core head (322), and a stepped tail seat (323). The core head (322) and the stepped tail seat (323) are located at both ends of the core body (321), and the core body (321), the core head (322), and the stepped tail seat (323) are integrally formed.

5. The hydraulic lock device for automatic opening of the annular blowout preventer hose bursting according to claim 4, characterized in that: Both the core head (322) and the stepped tailstock (323) have sealing ring grooves (324) on their outer surfaces, and a sealing ring is fixedly fitted in the sealing ring grooves (324).

6. The hydraulic lock device for automatic opening of the annular blowout preventer hose bursting according to claim 5, characterized in that: The control piston (33) includes a sealing disc (331), a piston slide rod (332), and a pusher (333). The sealing disc (331) is fixedly installed at one end of the piston slide rod (332), and the pusher (333) is threadedly connected to the other end of the piston slide rod (332).

7. The hydraulic lock device for automatic opening of the annular blowout preventer hose bursting according to claim 6, characterized in that: The first cover (4) includes an outer cover plate (41) and a limiting post (42). The limiting post (42) is evenly installed on the inner side of the outer cover plate (41) along the circumferential direction. One end of the limiting post (42) is fixedly connected to the outer cover plate (41), and a buffer pad (421) is fixedly installed on the other end of the limiting post (42).

8. The hydraulic lock device for automatic opening of the annular blowout preventer hose bursting according to claim 7, characterized in that: The second cover (5) includes an outer cover plate (51), a first support spring (52) and a second support spring (53). One end of the first support spring (52) and the second support spring (53) are fixed on the inner side of the outer cover plate (51), and the other end of the first support spring (52) and the second support spring (53) are connected to the stepped tail seat (323).

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