Blowout preventer closure and method of use thereof

Abstract

The invention provides a blowout preventer closing device. The blowout preventer closing device comprises a blowout preventer body, a driving assembly and a medium box. The driving assembly comprises an underwater driver, a first electromagnetic valve, a first water pump and a second water pump, the first electromagnetic valve communicates with the underwater driver, the first water pump and the second water pump communicate between the first electromagnetic valve and the blowout preventer body, and the first water pump and the second water pump are connected in parallel and communicate with the underwater driver; the first solenoid valve is configured to selectively communicate the underwater driver to the first water pump or the second water pump. The medium box communicates with the first water pump and the second water pump. The using method of the blowout preventer closing device comprises the following steps that S1, the driving assembly carries the medium box to be connected to the blowout preventer body; s2, a driving assembly is used for inputting fluid with preset pressure and fluid with preset flow into the blowout preventer body; and S3, the driving assembly and the medium box are recycled. According to the blowout preventer closing device, the blowout preventer can be driven to be closed when the blowout preventer closing device cannot be remotely operated to be closed.

Description

Technical Field

[0001] The invention belongs to the technical field of underwater operation equipment, and in particular relates to a blowout preventer closing device and a use method thereof. Background Art

[0002] A blowout preventer (BOP) is a large, specialized oilfield equipment used to seal, control, and monitor oil and gas wells in real time. At the bottom of the ocean, a blowout preventer is installed at the top of the wellhead on the seabed. The blowout preventer is connected to the offshore drilling platform through a drilling riser. The drill pipe is inside the drilling riser and passes through the blowout preventer (BOP). The equipment on the offshore drilling platform rotates the drill bit to move it downward to drill oil or gas wells.

[0003] However, during the drilling process of oil or gas wells, the drilling may be affected by certain crustal movements, which will generate huge pressure deep in the crust, forcing hydrocarbons (commonly oil and natural gas) to burst out. Crustal movements often lead to various catastrophic blowouts, such as the drill pipe and casing being pushed out of the wellbore, and in severe cases, hydrocarbons (commonly oil and natural gas) will leak and be released into the ocean. Blowout preventers (BOPs) prevent catastrophic blowouts from happening.

[0004] When a similar crustal movement occurs, the blowout preventer (BOP) is closed to prevent hydrocarbon leakage. The gate of the blowout preventer (BOP) is closed by equipment workers from the offshore drilling platform or the automatic closing system. When the blowout preventer (BOP) cannot be closed remotely, it is also easy to cause hydrocarbon leakage because the blowout preventer cannot be closed in time. Summary of the invention

[0005] The purpose of the embodiments of the present application is to provide a blowout preventer closing device and a method of using the same, so as to solve the technical problem in the prior art that the blowout preventer cannot be closed in time, resulting in hydrocarbon leakage.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted in this application is: to provide a blowout preventer closing device, comprising: The BOP body is capable of closing at a preset pressure and a preset flow rate; A drive assembly, the drive assembly comprising a subsea driver, a first solenoid valve, a first water pump and a second water pump, the first solenoid valve being connected to the subsea driver, the first water pump and the second water pump being connected between the first solenoid valve and the blowout preventer body, the first water pump and the second water pump being arranged in parallel and both connected to the subsea driver, the first solenoid valve being configured to selectively connect the subsea driver to the first water pump or the second water pump; The medium box is connected to the first water pump and the second water pump.

[0007] Optionally, the drive assembly also includes a first hydraulically controlled one-way valve and a second hydraulically controlled one-way valve, the first hydraulically controlled one-way valve being connected between the first water pump and the first solenoid valve, and being connected to the underwater drive, the second hydraulically controlled one-way valve being connected between the second water pump and the first solenoid valve, and being connected to the underwater drive, and being connected in parallel with the first hydraulically controlled one-way valve.

[0008] Optionally, the blowout preventer closing device further includes a pressure relief assembly, which includes a third hydraulically controlled one-way valve and a second solenoid valve, wherein the third hydraulically controlled one-way valve is connected between the blowout preventer body and the medium tank, and the second solenoid valve is connected between the subsea driver and the third hydraulically controlled one-way valve.

[0009] Optionally, the second water pump is provided in plurality, and the plurality of second water pumps are all connected between the first solenoid valve and the blowout preventer body and are mutually arranged in parallel.

[0010] Optionally, the driving assembly further includes a diverter throttle valve, and the diverter throttle valve is connected between the first solenoid valve and the plurality of the second water pumps.

[0011] Optionally, the medium tank includes a medium oil tank and a switch valve, the medium oil tank and the switch valve are both connected to the blowout preventer body, and the medium oil tank and the switch valve are connected in parallel.

[0012] Optionally, the medium box further comprises a filter, and the filter is connected to an end of the switch valve away from the blowout preventer body.

[0013] Optionally, the underwater driver comprises a driving oil tank, a hydraulic pump and a driving motor, the hydraulic pump is connected to the driving oil tank, and the driving motor is installed on the hydraulic pump.

[0014] Optionally, the drive assembly further includes an overflow valve, and the overflow valve is simultaneously connected between the blowout preventer body and the first water pump, and is also connected to the medium tank.

[0015] Optionally, the blowout preventer closing device further comprises a pressure sensor, wherein the pressure sensor is connected between the blowout preventer body and the drive assembly.

[0016] The present application also provides a method for using a blowout preventer closure device, comprising at least the following steps: The drive assembly carries the medium box and is connected to the BOP body; Using the driving assembly to input fluid of a preset pressure and a preset flow rate into the blowout preventer body until the blowout preventer body is closed; The drive assembly and the media box are recovered.

[0017] The beneficial effects of the blowout preventer closure device provided by the present application are: The blowout preventer closing device provided in the embodiment of the present application adopts an underwater driver, and can provide high-pressure medium and high-flow medium to the blowout preventer body through the first solenoid valve, the first water pump, the second water pump and the medium box, and the blowout preventer body can be closed under the action of the high-pressure medium and the high-flow medium. In this way, the blowout preventer body can be closed in time when the blowout preventer body cannot be closed remotely, and hydrocarbon leakage can be prevented. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 A hydraulic diagram of a blowout preventer closing device embodiment 1 provided in an embodiment of the present application; Figure 2 A three-dimensional diagram of a drive assembly of a blowout preventer closing device according to an embodiment of the present application; Figure 3 A hydraulic diagram of Embodiment 2 of the blowout preventer closing device provided in the embodiment of the present application; Figure 4 A hydraulic diagram of Embodiment 3 of the blowout preventer closing device provided in the embodiment of the present application; Figure 5 A hydraulic diagram of a fourth embodiment of a blowout preventer closing device provided in an embodiment of the present application; Figure 6 A flow chart of a method for using the blowout preventer closure device provided in an embodiment of the present application.

[0020] Among them, the reference numerals in the figure are: 1. BOP body; 2. Drive assembly; 21. Underwater drive; 211. Drive oil tank; 212. Hydraulic pump; 213. Drive motor; 22. First solenoid valve; 221. First left station; 222. First middle station; 223. First right station; 23. First water pump; 24. Second water pump; 25. First hydraulically controlled one-way valve; 26. Second hydraulically controlled one-way valve; 27. Diverter throttle valve; 28. Overflow valve; 29. ​​Flow control structure; 291. First one-way valve; 292. Second one-way valve; 3. Medium box; 31. Medium oil tank; 32. Switch valve; 33. Filter; 4. Pressure relief assembly; 41. Third hydraulically controlled one-way valve; 42. Second solenoid valve; 421. Second left station; 422. Second right station; 5. Pressure sensor; 6. Connect the male connector; 7. Connect the female connector. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0022] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0023] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0025] Based on this, the present invention provides a blowout preventer closing device and a method for using the same, wherein the device can drive the blowout preventer to close when the remote operation is not possible, thereby preventing hydrocarbon leakage.

[0026] Embodiment 1 like Figure 1As shown, the embodiment of the present application provides a blowout preventer closing device, including a blowout preventer body 1, a drive assembly 2 and a medium tank 3. The blowout preventer body 1 can be closed at a preset pressure and a preset flow rate. The drive assembly 2 includes a subsea driver 21, a first solenoid valve 22, a first water pump 23 and a second water pump 24. The first solenoid valve 22 is connected to the subsea driver 21. The first water pump 23 and the second water pump 24 are both connected between the first solenoid valve 22 and the blowout preventer body 1. The first water pump 23 and the second water pump 24 are arranged in parallel and are both connected to the subsea driver 21. The first solenoid valve 22 is configured to selectively connect the subsea driver 21 to the first water pump 23 or the second water pump 24. The medium tank 3 is connected to the first water pump 23 and the second water pump 24.

[0027] It should be noted that, in this embodiment, the underwater drive 21 is set as an ROV robot for example. In this embodiment, the first water pump 23 is set as a high-pressure water pump for example; of course, in other embodiments, according to actual application requirements, the first water pump 23 can also be set as other water pumps, which is not limited here. In this embodiment, the second water pump 24 is set as a high-flow water pump for example; of course, in other embodiments, according to actual application requirements, the second water pump 24 can also be set as other water pumps, which is not limited here. In this embodiment, the first solenoid valve 22 is set as a three-position four-way solenoid valve for example.

[0028] Specifically, in this embodiment, the first solenoid valve 22 has a first left station 221, a first middle station 222 and a first right station 223. When the blowout preventer cannot be closed remotely, after the drive assembly 2 and the medium box 3 are installed on the blowout preventer body 1. When the first solenoid valve 22 is at the first right station 223, the subsea driver 21 is connected to the first water pump 23 through the first solenoid valve 22, and the subsea driver 21 inputs hydraulic oil to the first water pump 23. Under the action of the first water pump 23, the medium in the medium box 3 can be transported to the blowout preventer body 1, and the medium in the medium box 3 can be pressurized to transport the high-pressure medium to the blowout preventer body 1, and the hydraulic oil flows back to the subsea driver 21 through the first water pump 23. It should be noted here that in this embodiment, the blowout preventer body 1 can be closed under the action of the high-pressure medium, that is, the preset pressure is high pressure. When the first solenoid valve 22 is at the first left position 221, the subsea driver 21 is connected to the second water pump 24 through the first solenoid valve 22, and the subsea driver 21 inputs hydraulic oil to the second water pump 24. Under the action of the second water pump 24, the medium inward can be delivered to the blowout preventer body 1, and the medium flow rate can be increased to deliver the high-flow medium to the blowout preventer body 1, and the hydraulic oil flows back to the subsea driver 21 through the second water pump 24. It should be noted that, in this embodiment, the blowout preventer body 1 can be closed under the action of the high-flow medium, that is, the preset flow rate is a high flow rate. When the first solenoid valve 22 is at the first middle position 222, the subsea driver 21 and the first water pump 23 can be blocked, and the subsea driver 21 and the second water pump 24 can also be blocked.

[0029] The blowout preventer closing device provided in the present application adopts an underwater driver 21, and can provide high-pressure medium and high-flow medium to the blowout preventer body 1 through the first solenoid valve 22, the first water pump 23, the second water pump 24 and the medium box 3. The blowout preventer body 1 can be closed under the action of the high-pressure medium and the high-flow medium. In this way, the blowout preventer body 1 can be closed in time when the blowout preventer body 1 cannot be closed remotely, so as to prevent hydrocarbon leakage.

[0030] In one embodiment of the present application, see Figure 1 The drive assembly 2 also includes a first hydraulically controlled one-way valve 25 and a second hydraulically controlled one-way valve 26. The first hydraulically controlled one-way valve 25 is connected between the first water pump 23 and the first solenoid valve 22, and is connected to the underwater driver 21. The second hydraulically controlled one-way valve 26 is connected between the second water pump 24 and the first solenoid valve 22, and is connected to the underwater driver 21, and is connected in parallel with the first hydraulically controlled one-way valve 25.

[0031] Specifically, when the first solenoid valve 22 is at the first right position 223, the hydraulic oil of the underwater driver 21 is delivered to the first hydraulically controlled one-way valve 25 through the first solenoid valve 22, the first hydraulically controlled one-way valve 25 is opened at a preset pressure, and after opening, the hydraulic oil can be delivered to the first water pump 23. When the first solenoid valve 22 is at the first left position 221, the hydraulic oil of the underwater driver 21 is delivered to the second hydraulically controlled one-way valve 26 through the first solenoid valve 22, the first hydraulically controlled one-way valve 25 is opened at a preset pressure, and after opening, the hydraulic oil can be delivered to the second water pump 24.

[0032] In this configuration, the first hydraulically controlled one-way valve 25 is used to prevent the first water pump 23 from being emptied when the underwater driver 21 is used to input hydraulic oil to the first water pump 23, thereby ensuring that the first water pump 23 can deliver the high-pressure medium to the blowout preventer body 1. The second hydraulically controlled one-way valve 26 is used to prevent the second water pump 24 from being emptied when the underwater driver 21 is used to input hydraulic oil to the second water pump 24, thereby ensuring that the second water pump 24 can deliver the high-flow medium to the blowout preventer body 1.

[0033] In one embodiment of the present application, please refer to Figure 1 The underwater driver 21 includes a driving oil tank 211 , a hydraulic pump 212 and a driving motor 213 . The hydraulic pump 212 is connected to the driving oil tank 211 , and the driving motor 213 is installed on the hydraulic pump 212 .

[0034] With such a configuration, the driving motor 213 can drive the hydraulic pump 212 to pump the hydraulic oil from the driving oil tank 211 to the first solenoid valve 22 or the second solenoid valve 42 .

[0035] Optionally, the hydraulic pump 212 is configured as a variable displacement hydraulic pump 212 .

[0036] With this arrangement, the flow rate can be adjusted according to the size of the external load, which can reduce heat generation.

[0037] In one embodiment of the present application, see Figure 1 The driving assembly 2 further includes an overflow valve 28 , which is connected between the blowout preventer body 1 and the first water pump 23 , and is also connected to the medium box 3 .

[0038] In this arrangement, with the overflow valve 28, when the pressure between the blowout preventer body 1 and the first water pump 23 exceeds the rated value, the high-pressure medium between the blowout preventer body 1 and the first water pump 23 can flow back into the medium box 3 through the overflow valve 28, which can effectively protect the device and help improve the safety performance of the device.

[0039] In one embodiment of the present application, see Figure 1The blowout preventer closing device also includes a pressure sensor 5 , which is connected between the blowout preventer body 1 and the drive assembly 2 .

[0040] In this configuration, the pressure sensor 5 can be used to detect the pressure between the blowout preventer body 1 and the drive assembly 2, and the first solenoid valve 22 can be controlled according to the pressure detected by the pressure sensor 5, so that the underwater robot is connected to the first water pump 23 or the second water pump 24, which is convenient for switching.

[0041] Optionally, the drive assembly 2 has a male connection head 6 ; the blowout preventer body 1 has a female connection head 7 , and the female connection head 7 is detachably and hermetically connected to the male connection head 6 .

[0042] Specifically, when the drive assembly 2 is installed on the blowout preventer body 1, the male connector 6 and the female connector 7 can be connected under the action of an external manipulator.

[0043] With such arrangement, the male connector 6 and the female connector 7 are used to connect the drive assembly 2 and the blowout preventer body 1 in a detachable manner.

[0044] Optionally, the drive assembly 2 also includes a flow direction control structure 29, which includes a first one-way valve 291 and a second one-way valve 292, wherein the first one-way valve 291 is connected between the first water pump 23 and the male connector 6, and the second one-way valve 292 is connected between the second water pump 24 and the male connector 6.

[0045] In this configuration, the first check valve 291 is used so that the high-pressure medium can be delivered to the blowout preventer body 1 through the first check valve 291, and the high-flow medium can be prevented from being delivered to the first water pump 23 through the first check valve 291. The second check valve 292 is used so that the high-flow medium can be delivered to the blowout preventer body 1 through the second check valve 292, and the high-pressure medium can be prevented from being delivered to the second water pump 24 through the second check valve 292.

[0046] Embodiment 2 This embodiment is basically the same as the first embodiment, and the difference is only that: Figure 1 As shown, the blowout preventer closing device also includes a pressure relief assembly 4, which includes a third hydraulically controlled one-way valve 41 and a second solenoid valve 42. The third hydraulically controlled one-way valve 41 is connected between the blowout preventer body 1 and the medium tank 3, and the second solenoid valve 42 is connected between the underwater driver 21 and the third hydraulically controlled one-way valve 41.

[0047] It should be noted that, in this embodiment, the second solenoid valve 42 is set as a two-position four-way solenoid valve for illustration.

[0048] Specifically, in this embodiment, the second solenoid valve 42 has a second left position 421 and a second right position 422. After the blowout preventer body 1 is closed, when the second solenoid valve 42 is located at the second right position 422, the subsea driver 21 and the third hydraulically controlled one-way valve 41 can be connected, and the hydraulic oil of the subsea driver 21 is delivered to the third hydraulically controlled one-way valve 41 through the second solenoid valve 42. The third hydraulically controlled one-way valve 41 is opened at a preset pressure to connect the medium tank 3 and the first water pump 23, and can also connect the medium tank 3 and the second water pump 24. The high-pressure medium output by the first water pump 23 flows back to the medium tank 3 through the third hydraulically controlled one-way valve 41, and the high-flow medium output by the second water pump 24 flows back to the medium tank 3 through the third hydraulically controlled one-way valve 41. When the second solenoid valve 42 is located at the second left station 421, it can block the underwater driver 21 and the third hydraulically controlled one-way valve 41 to keep the third hydraulically controlled one-way valve 41 in a closed state, thereby blocking the first water pump 23 and the medium tank 3, and can also block the second water pump 24 and the medium tank 3.

[0049] In this configuration, the third hydraulically controlled one-way valve 41 and the second solenoid valve 42 are used to control the on-off between the first water pump 23 and the medium tank 3, and also to control the on-off between the second water pump 24 and the medium tank 3. After the blowout preventer body 1 is completely closed, the high-pressure medium output by the first water pump 23 and the high-flow medium output by the second water pump 24 can be delivered to the medium tank 3 to relieve the pressure of the drive assembly 2, and when the drive assembly 2 and the blowout preventer body 1 are separated, the high-pressure medium and the high-flow medium generated by the drive assembly 2 can be prevented from splashing, and the working circuit can be effectively protected.

[0050] Embodiment 3 This embodiment is basically the same as the first embodiment, and the difference is only that: Figure 1 As shown, the second water pump 24 is provided in plurality, and the plurality of second water pumps 24 are all connected between the first solenoid valve 22 and the BOP body 1 and are arranged in parallel with each other. The flow splitter throttle valve 27 is connected between the first solenoid valve 22 and the plurality of second water pumps 24 .

[0051] It should be noted that in this embodiment, the number of the second water pumps 24 is set to two as an example. Of course, in other embodiments, the number of the second water pumps 24 can also be set to three, four, etc., according to actual application requirements, which is not limited here.

[0052] In this configuration, multiple second water pumps 24 are used, each of which can increase the medium flow rate and simultaneously deliver the medium flow rate to the BOP body 1, thereby shortening the closing time of the BOP body 1, quickly closing the BOP body 1, and preventing hydrocarbon leakage as much as possible. The split flow throttle valve 27 is used to evenly deliver the hydraulic oil output from the underwater driver 21 to the multiple second water pumps 24, thereby ensuring that the medium flow rate output by each second water pump 24 remains consistent, so that the device can operate stably.

[0053] Embodiment 4 This embodiment is basically the same as the first embodiment, and the difference is only that: Figure 1 As shown, the medium tank 3 includes a medium oil tank 31 and a switch valve 32, both of which are connected to the blowout preventer body 1, and the medium oil tank 31 and the switch valve 32 are connected in parallel. The medium tank 3 also includes a filter 33, and the filter 33 is connected to one end of the switch valve 32 away from the blowout preventer body 1.

[0054] It should be noted that in this embodiment, the medium in the medium tank 31 is set to ethylene glycol as an example. Of course, in other embodiments, according to actual application requirements, the medium in the medium tank 31 can also be set to mineral oil, etc., which is not limited here.

[0055] Specifically, during use, when the switch valve 32 is closed, the first water pump 23 and the second water pump 24 can pump medium from the medium tank 31. When the medium in the medium tank 31 is pumped out, the switch valve 32 is opened by an external manipulator, and the first water pump 23 and the second water pump 24 can use seawater as the medium and pump the seawater to the blowout preventer body 1.

[0056] In this way, the switch valve 32 is used, and the first water pump 23 and the second water pump 24 can select the medium or seawater in the medium box 3 for pumping, and can pump seawater when the medium is pumped out, which can prevent the blowout preventer body 1 from being unable to be closed due to direct pumping out, and help improve the convenience of use. The filter 33 is used to filter the seawater when pumping seawater, which can prevent impurities in the seawater from entering the device and causing damage to the device, and can effectively protect the device.

[0057] Optionally, the switch valve 32 is configured as a ball valve.

[0058] The present application also provides a method for using a blowout preventer closure device, comprising at least the following steps: S1: The drive assembly 2 carries the medium box 3 and is connected to the BOP body 1; S2: Use the drive assembly 2 to input fluid of a preset pressure and a preset flow rate into the blowout preventer body 1 until the blowout preventer body 1 is closed; S3: Recover the drive assembly 2 and the medium box 3.

[0059] The method of use provided in the present application can provide high-pressure medium and high-flow medium to the blowout preventer body 1 through the drive assembly 2 and the medium box 3, and can quickly close the blowout preventer body 1 when the blowout preventer body 1 cannot be closed remotely, thereby preventing hydrocarbon leakage.

[0060] One or more embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the present application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of the present application should be included in the protection scope of the present application.

Claims

1. A blowout preventer closing device, characterized in that: include: A blowout preventer body (1) capable of closing at a preset pressure and a preset flow rate; A drive assembly (2), the drive assembly (2) comprising a subsea driver (21), a first solenoid valve (22), a first water pump (23) and a second water pump (24), the first solenoid valve (22) being connected to the subsea driver (21), the first water pump (23) and the second water pump (24) being connected between the first solenoid valve (22) and the blowout preventer body (1), the first water pump (23) and the second water pump (24) being arranged in parallel and both connected to the subsea driver (21), the first solenoid valve (22) being configured to selectively connect the subsea driver (21) to the first water pump (23) or the second water pump (24); The medium box (3) is connected to the first water pump (23) and the second water pump (24).

2. The blowout preventer closure device according to claim 1, characterized in that: The drive assembly (2) further comprises a first hydraulically controlled one-way valve (25) and a second hydraulically controlled one-way valve (26); the first hydraulically controlled one-way valve (25) is connected between the first water pump (23) and the first solenoid valve (22), and is connected to the underwater driver (21); the second hydraulically controlled one-way valve (26) is connected between the second water pump (24) and the first solenoid valve (22), and is connected to the underwater driver (21), and is connected in parallel with the first hydraulically controlled one-way valve (25).

3. The blowout preventer closure device according to claim 1, characterized in that: The blowout preventer closing device further comprises a pressure relief assembly (4), the pressure relief assembly (4) comprising a third hydraulically controlled one-way valve (41) and a second solenoid valve (42), the third hydraulically controlled one-way valve (41) being connected between the blowout preventer body (1) and the medium tank (3), and the second solenoid valve (42) being connected between the subsea driver (21) and the third hydraulically controlled one-way valve (41).

4. The blowout preventer closure device according to claim 1, characterized in that: The second water pump (24) is provided in plurality, and the plurality of second water pumps (24) are all connected between the first solenoid valve (22) and the blowout preventer body (1), and are arranged in parallel with each other.

5. The blowout preventer closure device according to claim 4, characterized in that: The drive assembly (2) further comprises a flow splitter throttle valve (27), wherein the flow splitter throttle valve (27) is connected between the first solenoid valve (22) and the plurality of second water pumps (24).

6. The blowout preventer closure device according to claim 1, characterized in that: The medium tank (3) comprises a medium oil tank (31) and a switch valve (32). The medium oil tank (31) and the switch valve (32) are both connected to the blowout preventer body (1). The medium oil tank (31) and the switch valve (32) are connected in parallel.

7. The blowout preventer closure device according to claim 6, characterized in that: The medium box (3) further comprises a filter (33), wherein the filter (33) is connected to an end of the switch valve (32) away from the blowout preventer body (1).

8. The blowout preventer closure device according to any one of claims 1 to 7, characterized in that: The underwater driver (21) comprises a driving oil tank (211), a hydraulic pump (212) and a driving motor (213); the hydraulic pump (212) is connected to the driving oil tank (211), and the driving motor (213) is installed on the hydraulic pump (212).

9. The blowout preventer closure device according to any one of claims 1 to 7, characterized in that: The drive assembly (2) further comprises an overflow valve (28), wherein the overflow valve (28) is simultaneously connected between the blowout preventer body (1) and the first water pump (23), and is also connected to the medium tank (3).

10. A method for using the blowout preventer closure device according to any one of claims 1 to 9, characterized in that: At least the following steps are included: The drive assembly (2) carries the medium box (3) and is connected to the blowout preventer body (1); Using the drive assembly (2) to input fluid at a preset pressure and a preset flow rate into the blowout preventer body (1) until the blowout preventer body (1) is closed; The drive assembly (2) and the medium box (3) are recovered.

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