A pilot-controlled hydraulic blowout preventer control device and its application

Abstract

This invention relates to a pilot-controlled hydraulic blowout preventer (BOP) control device and its application. The device includes: an accumulator group, a driller's control console, a high-pressure control zone, and an atmospheric pressure control zone. The high-pressure control zone includes a high-pressure regulating valve, a high-pressure two-position three-way rotary valve, a first cylinder, a high-pressure shear valve, a second cylinder, and a high-pressure reducing valve. The inlet of the high-pressure two-position three-way rotary valve is connected to the accumulator group via the high-pressure regulating valve. The first outlet of the high-pressure two-position three-way rotary valve is connected to the atmospheric pressure control zone via the high-pressure reducing valve. The second outlet of the high-pressure two-position three-way rotary valve is connected to the inlet of the high-pressure shear valve. The first cylinder is connected to both the high-pressure two-position three-way rotary valve and the driller's control console. The second cylinder is connected to both the high-pressure shear valve and the driller's control console. The driller's control console controls the operation of the first cylinder to control the direction of the high-pressure two-position three-way rotary valve, directing hydraulic oil flow to the high-pressure shear valve or the atmospheric pressure control zone; and controls the operation of the second cylinder to control the high-pressure shear valve to be in the open or closed position.

Description

Technical Field

[0001] This invention relates to the field of well control technology in the petroleum industry, and particularly to a pilot-controlled hydraulic blowout preventer control device and its application. Background Technology

[0002] Hydraulic blowout preventers are essential safety equipment for preventing blowouts in oil and gas drilling. The hydraulic blowout preventer can be shut down by operating the control device.

[0003] The existing hydraulic blowout preventer (BOP) control system mainly consists of a remote control console, hydraulic lines, a driller's control console (or HMI control panel or button box), and air cables. The remote control console mainly comprises an accumulator group, a pressure relief valve, a three-position four-way valve, a pressure regulating valve, an electric pump, an air pump, and hydraulic manifolds. The rated pressure of the accumulator group in the hydraulic BOP control system is 21 MPa. In emergencies requiring well shut-in, conventional blowout prevention operations are typically performed remotely from the driller's control console. This allows the 21 MPa hydraulic oil in the accumulator group to be depressurized through the pressure relief valve and pressure regulating valve in the manifold, and then the three-position four-way valve closes the hydraulic BOP at the wellhead.

[0004] With the increasing number of deep and ultra-deep wells in oil exploration and development, formation conditions are becoming increasingly complex, making emergency response more difficult and placing new demands on the output pressure of hydraulic blowout preventer (BOP) control devices. Current hydraulic BOP control devices cannot provide sufficient shearing force to cut high-grade drill pipe, drill pipe joints, drill collars, and other drilling tools. If a higher pressure than the rated pressure of existing hydraulic BOP control devices is required, it is necessary to temporarily increase the output pressure of the hydraulic BOP control device using a pneumatic pump. This method is complex and may delay the optimal well shut-in time. Summary of the Invention

[0005] As a first aspect of the present invention, the present invention provides a pilot-controlled hydraulic blowout preventer control device, comprising:

[0006] Accumulator group, driller's console, high-pressure control area and atmospheric pressure control area;

[0007] The high-pressure control zone includes a high-pressure regulating valve, a high-pressure two-position three-way rotary valve, a first cylinder, a high-pressure shear valve, a second cylinder, and a high-pressure reducing valve.

[0008] The inlet of the high-pressure two-position three-way rotary valve is connected to the accumulator group via the high-pressure regulating valve;

[0009] The first drain port of the high-pressure two-position three-way rotary valve is connected to the atmospheric pressure control area via the high-pressure pressure reducing valve.

[0010] The second drain port of the high-pressure two-position three-way rotary valve is connected to the inlet of the high-pressure shear valve;

[0011] The first cylinder is connected to the high-pressure two-position three-way rotary valve and the driller's control console, respectively;

[0012] The second cylinder is connected to the high-pressure shear valve and the driller's control console, respectively;

[0013] The accumulator group is used to store hydraulic oil at a preset high pressure;

[0014] The high-pressure regulating valve is used to regulate the pressure of the hydraulic oil to a first preset pressure value, and the high-pressure reducing valve is used to regulate the pressure of the hydraulic oil to a second preset pressure value, wherein the first preset pressure value is greater than the second preset pressure value.

[0015] The driller's control console is used to control the action of the first cylinder to control the direction of the high-pressure two-position three-way rotary valve, so that the hydraulic oil flows to the high-pressure shear valve or the normal pressure control zone; and to control the action of the second cylinder to control the high-pressure shear valve to be in the open or closed position.

[0016] In one or more optional embodiments, the atmospheric pressure control zone includes:

[0017] The system comprises a first pressure regulating valve, a second pressure regulating valve, a two-position three-way rotary valve, a third cylinder, a first three-position four-way valve, a fourth cylinder, at least one second three-position four-way valve, and at least one fifth cylinder.

[0018] The inlet of the two-position three-way rotary valve is connected to the outlet of the high-pressure reducing valve via the first pressure regulating valve.

[0019] The first drain port of the two-position three-way rotary valve is connected to the inlet of the first three-position four-way valve via the second pressure regulating valve.

[0020] The second drain port of the two-position three-way rotary valve is connected to the inlet port of the second three-position four-way valve;

[0021] The third cylinder is connected to the two-position three-way rotary valve and the driller's control console, respectively.

[0022] The fourth cylinder is connected to the first three-position four-way valve and the driller's control console, respectively.

[0023] The fifth cylinder is connected to the second three-position four-way valve and the driller's control console, respectively.

[0024] The first pressure regulating valve is used to regulate the pressure of the hydraulic oil to a third preset pressure value, and the second pressure regulating valve is used to regulate the pressure of the hydraulic oil to a fourth preset pressure value, wherein the third preset pressure value is greater than the fourth preset pressure value;

[0025] The driller's control console is used to control the operation of the third cylinder to control the direction of the two-position three-way rotary valve, so that the hydraulic oil flows to the first three-position four-way valve and / or the second three-position four-way valve; to control the operation of the fourth cylinder to control the first three-position four-way valve to be in the open or closed position; and to control the operation of the fifth cylinder to control the second three-position four-way valve to be in the open or closed position.

[0026] In one or more alternative embodiments, the control device further includes an oil tank and a high-pressure pump assembly;

[0027] The high-pressure pump group is connected to the oil tank and the accumulator group respectively, and is used to charge the hydraulic oil in the oil tank into the accumulator group.

[0028] In one or more alternative embodiments, the high-pressure pump assembly includes at least one electric pump and at least one air pump.

[0029] In one or more optional embodiments, the control device further includes a gas source and a gas source processing element;

[0030] The air source is connected to the driller's control console, the first cylinder, the second cylinder, the third cylinder, the fourth cylinder, and the fifth cylinder via the air source processing element;

[0031] The air source processing element is used to filter, demist, and regulate the pressure of the compressed air provided by the air source.

[0032] In one or more alternative embodiments, a first overflow valve is provided between the energy storage group and the electric pump;

[0033] A high-pressure relief valve is provided between the accumulator group and the high-pressure pressure reducing valve.

[0034] In one or more optional embodiments, the control device further includes a first pressure controller and a second pressure controller;

[0035] The first pressure controller is connected to the electric pump and is used to control the start and stop of the electric pump;

[0036] The second pressure controller is connected to the accumulator group and the electric pump respectively, and is used to monitor the pressure of the accumulator group.

[0037] In one or more alternative embodiments, the control device further includes a liquid-gas switch;

[0038] The liquid-gas switch is connected to the gas source and the gas pump, respectively.

[0039] The liquid-gas switch is used to control the start and stop of the gas pump.

[0040] In one or more alternative embodiments, the high-pressure control zone further includes a first pneumatic pressure transmitter;

[0041] The air inlet and outlet of the first pneumatic pressure transmitter are connected to the driller's control console, and the liquid inlet of the first pneumatic pressure transmitter is connected to the high-pressure two-position three-way rotary valve and the high-pressure pressure reducing valve, respectively.

[0042] In one or more optional embodiments, the atmospheric pressure control zone further includes a second pneumatic pressure transmitter, a third pneumatic pressure transmitter, and a fourth pneumatic pressure transmitter.

[0043] The air inlet and outlet of the second pneumatic pressure transmitter are connected to the driller's control console; the liquid inlet of the second pneumatic pressure transmitter is connected to the high-pressure reducing valve.

[0044] The air inlet and outlet of the third pneumatic pressure transmitter are connected to the driller's control console; the liquid inlet of the third pneumatic pressure transmitter is connected to the second three-position four-way valve.

[0045] The air inlet and outlet of the fourth pneumatic pressure transmitter are connected to the driller's control console; the liquid inlet of the fourth pneumatic pressure transmitter is connected to the first three-position four-way valve.

[0046] In one or more optional embodiments, the control device further includes a pneumatic pressure regulating valve and a three-position four-way pneumatic rotary valve;

[0047] The first air inlet of the three-position four-way rotary valve is connected to the driver's control console;

[0048] The second air inlet of the three-position four-way rotary valve is connected to the pneumatic pressure regulating valve.

[0049] The outlet of the three-position four-way rotary valve is connected to the second pressure regulating valve;

[0050] The pneumatic pressure regulating valve is used to regulate the pressure of the compressed air to a sixth preset pressure value;

[0051] The driller's console is used to control the direction of the three-position four-way air valve so that the compressed air flows to the second pressure regulating valve.

[0052] In one or more alternative embodiments, the control device further includes an air filter pressure reducing valve;

[0053] The air filter pressure reducing valve inlet is connected to the driller's control console;

[0054] The exhaust port of the air filter pressure reducing valve is connected to the air inlet of the first pneumatic pressure transmitter, the air inlet of the second pneumatic pressure transmitter, the air inlet of the third pneumatic pressure transmitter, and the air inlet of the fourth pneumatic pressure transmitter, respectively.

[0055] The air filter pressure reducing valve is used to filter and reduce the pressure of the compressed air.

[0056] As a second aspect of the present invention, the present invention provides an application of a pilot-controlled hydraulic blowout preventer control device in hydraulic blowout preventer control.

[0057] The pilot-controlled hydraulic blowout preventer (BOP) control device provided in this invention independently houses the high-pressure shear valve in the high-pressure control zone. Hydraulic oil is depressurized by a high-pressure pressure reducing valve before entering the atmospheric pressure control zone. The high-pressure shear valve is pilot-controlled by the hydraulic oil in the high-pressure control zone, directly providing high pressure when the BOP requires high-pressure, high-volume operation. This ensures the effectiveness and safety of well shut-in operations in emergency situations and facilitates on-site management. The accumulator group provides high-pressure hydraulic oil to the high-pressure shear valve, avoiding insufficient shearing force during well shut-in due to low rated pressure of the BOP control device, preventing the inability to shear the drill string, and preventing problems such as rapid pressure loss, insufficient remaining pressure, and insufficient fluid volume during conventional well shut-in operations that could prevent well shut-in in emergencies. Attached Figure Description

[0058] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0059] Figure 1 This is a schematic diagram of the pilot-controlled hydraulic blowout preventer control device provided in an embodiment of the present invention.

[0060] In the picture:

[0061] 1 is the gas source, 2 is the gas source processing element, 3 is the liquid-gas switch, 4 is the air pump, 5 is the second check valve, 6 is the electric pump, 7 is the first check valve, 8 is the motor, 9 is the first pressure controller, 10 is the second pressure controller, 11 is the first overflow valve, 12 is the accumulator group, 121 is the accumulator bottle, 13 is the high-pressure regulating valve, 14 is the high-pressure two-position three-way rotary valve, 15 is the high-pressure shear valve, 16 is the high-pressure overflow valve, 17 is the high-pressure pressure reducing valve, 18 is the first pneumatic pressure transmitter, 19 is the first pressure regulating valve, 20 is the two-position three-way rotary valve, 21 is the second overflow valve, 22 is the second pressure regulating valve, 23 is the first three-position four-way valve, 24 is the second three-position four-way valve, and 25 is the second pneumatic pressure transmitter. 26 is the third pneumatic pressure transmitter, 27 is the fourth pneumatic pressure transmitter, 28 is the air filter pressure reducing valve, 29 is the three-position four-way pneumatic rotary valve, 30 is the pneumatic pressure regulating valve, 31 is the ball valve, 32 is the oil filter, 33 is the oil tank, 34 is the first pressure gauge, 35 is the second pressure gauge, 36 is the third pressure gauge, 37 is the fourth pressure gauge, 38 is the fifth pressure gauge, 39 is the sixth pressure gauge, 40 is the first cylinder, 41 is the second cylinder, 42 is the third cylinder, 43 is the fourth cylinder, 44 is the fifth cylinder, 45 is the first air cable connection assembly, 46 is the second air cable connection assembly, 47 is the atmospheric pressure connection assembly, 48 is the low pressure connection assembly, and 49 is the driller's control console. Detailed Implementation

[0062] To facilitate understanding of the present invention, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as "connected" to another element, it can be directly connected to the other element, or there may be one or more intermediate elements between them. The terms "upper," "lower," "inner," "outer," "vertical," "horizontal," etc., used in this specification to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0063] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0064] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0065] The inventors discovered that current blowout preventer (BOP) control devices typically have a rated pressure of 21 MPa. However, testing revealed that successfully shearing certain large-diameter, thick-walled drill pipes requires a control pressure of approximately 28 MPa, far exceeding the 21 MPa rated pressure of conventional control devices. In emergency situations requiring well shut-in, where the shearing position is incorrect or at the drill pipe joint, a control pressure higher than 28 MPa is needed. In such special circumstances, existing BOP control devices require temporary pressurization via a pneumatic pump to increase the output pressure. This method is complex; since the accumulator's rated pressure is 21 MPa, the accumulator assembly must be isolated, and the pneumatic pump's bypass valve must be opened. Errors in any of these steps could delay the optimal well shut-in time, posing significant potential risks to well control safety. Furthermore, the use of high-pressure BOP assemblies increases control pressure and the required high-pressure fluid volume, which existing BOP control devices cannot meet.

[0066] Chinese Patent Publication No. CN101555777 discloses a "Surface Blowout Preventer (BOP) Control Device." To prevent blowouts during drilling, a remote control console and the driller's console are connected via a gas cable. A three-position four-way pneumatic control valve on the driller's console controls the switching of a three-position four-way valve on the remote control console via gas-based control, thereby actuating the BOP gate to open or close, achieving remote control of the BOP gate opening and closing from the driller's console. However, in special situations requiring high-pressure shearing, the surface BOP control device needs to temporarily increase the output pressure using a pneumatic pump. This method is complex to operate, potentially delaying the optimal shut-in time, and the device's rated pressure of 21 MPa is insufficient for high-pressure BOP assembly requirements.

[0067] Chinese Patent Publication No. CN201057015 discloses an "electrically controlled surface blowout preventer control device." This device allows for remote control of the surface blowout preventer control console via an HMI panel and button box, ensuring reliable signal transmission and sensitive operation. It also displays the valve position on the remote console via a magnetic switch signal. While the electrically controlled surface blowout preventer control device is sensitive, its rated pressure of 21 MPa is insufficient to meet the pressure requirements for shearing high-strength drill pipe, drill pipe joints, drill collars, and other drilling tools.

[0068] Example 1

[0069] This invention provides a pilot-controlled hydraulic blowout preventer control device, referring to... Figure 1As shown, it includes an accumulator group 12, a driller's control console 49, a high-pressure control area, and an atmospheric pressure control area;

[0070] The aforementioned high-pressure control zone includes a high-pressure regulating valve 13, a high-pressure two-position three-way rotary valve 14, a first cylinder 40, a high-pressure shear valve 15, a second cylinder 41, and a high-pressure reducing valve 17.

[0071] The inlet of the high-pressure two-position three-way rotary valve 14 is connected to the accumulator group 12 via the high-pressure regulating valve 13;

[0072] The first drain port of the high-pressure two-position three-way rotary valve 14 is connected to the atmospheric pressure control area via the high-pressure pressure reducing valve 17.

[0073] The second drain port of the high-pressure two-position three-way rotary valve 14 is connected to the inlet of the high-pressure shear valve 15;

[0074] The first cylinder 40 is connected to the high-pressure two-position three-way rotary valve 14 and the driller's control console 49 respectively;

[0075] The second cylinder 41 is connected to the high-pressure shear valve 15 and the driller's control console 49 respectively;

[0076] The aforementioned accumulator group 12 is used to store hydraulic oil at a preset high pressure;

[0077] The high-pressure regulating valve 13 is used to regulate the pressure of the hydraulic oil to a first preset pressure value, and the high-pressure reducing valve 17 is used to regulate the pressure of the hydraulic oil to a second preset pressure value, wherein the first preset pressure value is greater than the second preset pressure value.

[0078] The driller's control console 49 is used to control the operation of the first cylinder 40 to control the direction of the high-pressure two-position three-way rotary valve 14, so that the hydraulic oil flows to the high-pressure shear valve 15 or the normal pressure control area; and to control the operation of the second cylinder 41 to control the high-pressure shear valve 15 to be in the open or closed position.

[0079] The pilot-controlled hydraulic blowout preventer control device provided in this embodiment of the invention allows hydraulic oil to flow from the accumulator group 12 and then through the high-pressure regulating valve 13 to adjust its pressure to a first preset pressure value before flowing to the high-pressure two-position three-way pressure reducing valve. The first preset pressure value is set according to the pressure required by the controlled object of the high-pressure shear valve 15 under actual conditions. For example, if it is necessary to perform shearing operation on large-size, high-wall-thickness drill pipes, the first preset pressure value is generally set to 28MPa.

[0080] The pilot-controlled hydraulic blowout preventer control device provided in this embodiment of the invention has a first cylinder 40 and a second cylinder 41 connected to the driller's control console 49 via an air cable. When high-pressure shearing is required during well shut-in operation, the driller's control console 49 is operated to allow hydraulic oil reaching a first preset pressure value to flow through the high-pressure two-position three-way rotary valve 14 to the high-pressure shear valve 15. Then, the driller's control console 49 is operated to close the high-pressure shear valve 15, performing the high-pressure shearing operation for well shut-in. When high-pressure shearing is not required during well shut-in operation, the driller's control console 49 is operated to allow hydraulic oil reaching the first preset pressure value to be depressurized by the high-pressure pressure reducing valve 17 and flow to the atmospheric pressure control zone.

[0081] In this embodiment of the invention, after the hydraulic oil flows into the high-pressure reducing valve 17, it is reduced to a second preset pressure value through the high-pressure reducing valve 17. Since the rated pressure of existing general blowout preventer control devices is 21 MPa, the second preset pressure value is set to 21 MPa, that is, the pressure of the hydraulic oil flowing to the normal pressure control zone is 21 MPa.

[0082] In this embodiment of the invention, several ball valves 31 and several oil filters 32 are installed in the hydraulic pipeline of the pilot-controlled hydraulic blowout preventer control device. The ball valves 31 are used to control the passage and blockage of the hydraulic pipeline. Before performing the well shut-in operation, the ball valves 31 in the hydraulic pipeline need to be opened to ensure that the hydraulic pipeline of the entire pilot-controlled hydraulic blowout preventer control device is in a passable state, ensuring that the hydraulic oil can flow smoothly through the hydraulic pipeline. The oil filters 32 are used to filter the hydraulic oil to prevent impurities from accumulating in the hydraulic oil and causing blockage.

[0083] In this embodiment of the invention, the accumulator group 12 includes a plurality of interconnected accumulator bottles 121, and a ball valve 31 is respectively provided at the port of each accumulator bottle 121. The rated pressure of the accumulator group 12 is 35MPa, and it can provide high-pressure hydraulic oil with a pressure of 35MPa.

[0084] In one or more alternative embodiments, reference is made to Figure 1 As shown, the pilot-controlled hydraulic blowout preventer control device provided in this embodiment of the invention also includes an oil tank 33 and a high-pressure pump set;

[0085] The high-pressure pump set is connected to the oil tank 33 and the accumulator group 12 respectively;

[0086] Oil tank 33 is used to replenish the hydraulic oil;

[0087] The high-pressure pump unit is used to fill the hydraulic oil in the oil tank 33 into the accumulator group 12.

[0088] The high-pressure pump set includes at least one electric pump 6 and at least one air pump 4.

[0089] In this embodiment of the invention, the high-pressure pump set includes one electric pump 6 and two air pumps 4. A first check valve 7 is installed at the drain port of the electric pump 6, and a second check valve 5 is installed at the drain ports of the two air pumps 4. The oil tank 33 has three drain ports corresponding to the electric pump 6 and the two air pumps 4, respectively. A ball valve 31 and an oil filter 32 are installed at each of the three drain ports. The first drain port of the oil tank 33 is connected to the electric pump 6 via the ball valve 31 and the oil filter 32, and the second and third drain ports are connected to the two air pumps 4 via the ball valve 31 and the oil filter 32, respectively.

[0090] Accumulator group 12 is connected to the drain port of electric pump 6 via first check valve 7; accumulator group 12 is connected to the oil drain port of air pump 4 via ball valve 31 and second check valve 5; accumulator group 12 is connected to the inlet of high pressure regulating valve 13 via ball valve 31 and oil filter 32, the drain port of high pressure regulating valve 13 is connected to the inlet of high pressure reducing valve 17 via oil filter 32, and the drain port of high pressure reducing valve 17 is connected to the atmospheric pressure control zone.

[0091] In this embodiment of the invention, the process of storing and replenishing hydraulic oil using the pilot-controlled hydraulic blowout preventer control device provided in this embodiment of the invention may include:

[0092] The hydraulic oil in the oil tank 33 enters the electric pump 6 and / or the air pump 4 after passing through the ball valve 31 and the oil filter 32.

[0093] Hydraulic oil is pressurized and charged into accumulator group 12 by electric pump 6 and / or air pump 4;

[0094] When the oil pressure of the accumulator group 12 rises to 35MPa, the electric pump 6 and / or the air pump 4 stop operating.

[0095] When the oil pressure in the accumulator group 12 drops too much, the electric pump 6 and / or the air pump 4 will automatically start to replenish the pressurized oil in the accumulator group 12.

[0096] In this embodiment of the invention, the drain port of the high-pressure two-position three-way rotary valve 14 is connected to the oil tank 33, and excess hydraulic oil can return to the oil tank 33 through the drain port of the high-pressure two-position three-way rotary valve 14.

[0097] In one or more optional embodiments, the high-pressure control zone further includes a first relief valve 11 and a high-pressure relief valve 16. The first relief valve 11 is provided between the accumulator group 12 and the electric pump 6 to protect the accumulator group 12 and the hydraulic pipeline between the accumulator group 12 and the high-pressure pump group, preventing excessive oil pressure in this section of the hydraulic pipeline from damaging the accumulator group 12 and the hydraulic pipeline. The high-pressure relief valve 16 is provided between the accumulator group 12 and the high-pressure reducing valve 17 to protect the accumulator group 12 and the hydraulic pipeline between the accumulator group 12 and the high-pressure reducing valve 17, preventing excessive oil pressure in this section of the hydraulic pipeline from damaging the accumulator group 12 and the hydraulic pipeline.

[0098] In one or more alternative embodiments, reference is made to Figure 1 As shown, the high-pressure control zone also includes a motor 8; the motor 8 is connected to the electric pump 6 and can provide power to the electric pump 6. Before using this control device to perform a well shut-in operation, the motor 8 should be turned on to ensure that the electric pump 6 can operate normally.

[0099] In one or more optional embodiments, the above-mentioned atmospheric pressure control zone includes: a first pressure regulating valve 19, a second pressure regulating valve 22, a two-position three-way rotary valve 20, a third cylinder 42, a first three-position four-way valve 23, a fourth cylinder 43, at least one second three-position four-way valve 24, and at least one fifth cylinder 44.

[0100] The inlet of the two-position three-way rotary valve 20 is connected to the outlet of the high-pressure pressure reducing valve 17 via the first pressure regulating valve 19.

[0101] The first drain port of the two-position three-way rotary valve 20 is connected to the inlet of the first three-position four-way valve 23 via the second pressure regulating valve 22;

[0102] The second drain port of the two-position three-way rotary valve 20 is connected to the inlet port of the second three-position four-way valve 24;

[0103] The third cylinder 42 is connected to the two-position three-way rotary valve 20 and the driller's control console 49 respectively;

[0104] The fourth cylinder 43 is connected to the first three-position four-way valve 23 and the driller's control console 49 respectively;

[0105] The fifth cylinder 44 is connected to the second three-position four-way valve 24 and the driller's control console 49 respectively;

[0106] The first pressure regulating valve 19 is used to regulate the pressure of the hydraulic oil to a third preset pressure value, and the second pressure regulating valve 22 is used to regulate the pressure of the hydraulic oil to a fourth preset pressure value, wherein the third preset pressure value is greater than the fourth preset pressure value.

[0107] The driller's control console 49 is used to control the operation of the third cylinder 42 to control the direction of the two-position three-way rotary valve 20, so that the hydraulic oil flows to the first three-position four-way valve 23 and / or the second three-position four-way valve 24; control the operation of the fourth cylinder 43 to control the first three-position four-way valve 23 to be in the open or closed position; and control the operation of the fifth cylinder 44 to control the second three-position four-way valve 24 to be in the open or closed position.

[0108] In this embodiment of the invention, the object controlled by the first three-position four-way valve 23 is an annular blowout preventer.

[0109] In this embodiment of the invention, five second three-position four-way valves 24 and five fifth cylinders 44 respectively connected to the five three-position four-way valves are provided. The five fifth cylinders 44 are connected to the driller's control console 49 via air cables. The five three-position four-way valves control five corresponding gate blowout preventers, which can be: a full-sealed blowout preventer, a blowout release blowout preventer, a standby blowout preventer, and at least one semi-sealed blowout preventer.

[0110] In this embodiment of the invention, the inlet of the first pressure regulating valve 19 is connected to the outlet of the high-pressure reducing valve 17 via the oil filter 32 and the ball valve 31, and the outlet of the first pressure regulating valve 19 is connected to the inlet of the two-position three-way rotary valve 20. The first pressure regulating valve 19 can regulate the pressure of the hydraulic oil passing through to a third preset pressure value. The third preset pressure value is set according to the pressure required by the controlled object of the second three-position four-way valve 24 under actual conditions. Generally, the third preset pressure value is set to 21MPa, which is sufficient to meet the pressure requirements of the controlled objects of the five second three-position four-way valves 24.

[0111] In this embodiment of the invention, the inlet of the second pressure regulating valve 22 is connected to the first outlet of the two-position three-way rotary valve 20, and the outlet of the second pressure regulating valve 22 is connected to the inlet of the first three-position four-way valve 23. The second pressure regulating valve 22 can regulate the pressure of the hydraulic oil passing through it to a fourth preset pressure value. The fourth preset pressure value is set according to the pressure value required by the controlled object of the first three-position four-way valve 23 under actual conditions. It can be set to 10.5MPa, which can meet the pressure requirements of the controlled object of the first three-position four-way valve 23.

[0112] In this embodiment of the invention, the hydraulic oil, which has been reduced to 21 MPa by the high-pressure reducing valve 17, enters the two-position three-way rotary valve 20 through the ball valve 31, the oil filter 32 and the pressure regulating valve. By operating the driller's control console 49, the flow direction of the hydraulic oil is controlled according to the actual situation on site, so that the hydraulic oil flows into the second three-position four-way valve 24 or flows into the first three-position four-way valve 23 through the oil filter 32 and the second pressure regulating valve 22.

[0113] In one or more optional embodiments, the above-mentioned atmospheric pressure control zone further includes a second relief valve 21; the inlet of the second relief valve 21 is connected to the high pressure reducing valve 17, and the outlet is connected to the second pressure regulating valve 22; the second relief valve 21 is used to protect the hydraulic pipeline between the high pressure reducing valve 17 and the second pressure regulating valve 22 to prevent excessive pressure from damaging the hydraulic pipeline.

[0114] In this embodiment of the invention, an atmospheric pressure connection assembly 47 is provided between the hydraulic pipeline of the high-pressure control zone and the hydraulic pipeline of the atmospheric pressure operation zone.

[0115] In one or more optional embodiments, the control device further includes a gas source 1 and a gas source processing element 2;

[0116] Air source 1 is connected to the driller's control console 49, first cylinder 40, second cylinder 41, third cylinder 42, fourth cylinder 43 and fifth cylinder 44 via the air source processing element 2;

[0117] Air source 1 is used to provide compressed air to the driller's control console 49, the first cylinder 40, the second cylinder 41, the third cylinder 42, the fourth cylinder 43 and the fifth cylinder 44;

[0118] The air source processing element 2 is used to filter, demist, and regulate the pressure of the compressed air provided by the air source 1.

[0119] In this embodiment of the invention, the air source 1 is connected to the driller's control console 49, the first cylinder 40, the second cylinder 41, the third cylinder 42, the fourth cylinder 43, and the fifth cylinder 44 via an air cable. A first air cable connection assembly 45 is provided between the air source 1 and the driller's control console 49, the first cylinder 40, the second cylinder 41, the third cylinder 42, and the fourth cylinder 43. Compressed air is output from the air source 1, processed by the air source processing element 2, and then flows into the first air cable connection assembly 45, and then flows to various locations through the first air cable connection assembly 45.

[0120] In this embodiment of the invention, the compressed air provided by the air source 1 is used to realize the pneumatic control of the control device. The air source processing element 2 is disposed at the exhaust port of the air source 1, and can filter, demist and regulate the pressure of the compressed air output by the air source 1 to ensure the purity of the compressed air, avoid clogging the control device, and regulate the pressure of the compressed air to between 0.6MPa and 0.8MPa to meet the pressure requirements of the pneumatic control of the control device.

[0121] In one or more optional embodiments, the control device further includes a first pressure controller 9 and a second pressure controller 10; the first pressure controller 9 is connected to the electric pump 6 and is used to control the start and stop of the electric pump 6; the second pressure controller 10 is connected to the accumulator group 12 and the electric pump 6 respectively and is used to monitor the pressure of the accumulator group 12.

[0122] In this embodiment of the invention, the first pressure controller 9 can automatically control the start and stop of the electric pump 6, specifically including:

[0123] When the oil pressure in the accumulator group 12 is too low, the first pressure controller 9 controls the electric pump 6 to start automatically, filling the hydraulic oil in the oil tank 33 into the accumulator group 12; when the oil pressure in the accumulator group 12 rises to its rated pressure, the first pressure controller 9 controls the electric pump 6 to stop running automatically.

[0124] In this embodiment of the invention, the second pressure controller 10 can issue an alarm when the oil pressure in the accumulator group 12 and the hydraulic pipeline is too high, and monitor whether the control device is operating safely. For example, when the electric pump 6 or the air pump 4 malfunctions, and the oil pressure in the hydraulic pipeline between the high-pressure pump group and the accumulator group 12 exceeds the rated pressure of the accumulator group 12, the second pressure controller 10 will issue an alarm to indicate that a malfunction has occurred.

[0125] In one or more optional embodiments, the control device further includes a pneumatic pressure regulating valve 30 and a three-position four-way air control valve 29; the first air inlet of the three-position four-way air control valve 29 is connected to the driller's control console; the second air inlet of the three-position four-way air control valve 29 is connected to the pneumatic pressure regulating valve 30; the air outlet of the three-position four-way air control valve 29 is connected to the second pressure regulating valve 22; the pneumatic pressure regulating valve 30 is used to regulate the pressure of the compressed air to a sixth preset pressure value; the driller's control console 49 is used to control the direction of the three-position four-way air control valve 29 so that the compressed air flows to the second pressure regulating valve 22.

[0126] In one or more optional embodiments, the control device further includes an air filter pressure reducing valve 28; the air inlet of the air filter pressure reducing valve 28 is connected to the driller's control console 49; the exhaust port of the air filter pressure reducing valve 28 is connected to the air inlets of the first pneumatic pressure transmitter 18, the second pneumatic pressure transmitter 25, the third pneumatic pressure transmitter 26, and the fourth pneumatic pressure transmitter 27, respectively. The air filter pressure reducing valve 28 is used to filter and reduce the pressure of compressed air.

[0127] In one or more optional embodiments, the control device further includes a liquid switch, the liquid-gas switch 3 being connected to the gas source 1 and the air pump 4 respectively, for controlling the start and stop of the air pump 4.

[0128] In this embodiment of the invention, a second air cable connection assembly 46 is installed on the air cable near the driller's control console 49. The second air cable connection assembly 46 collects the passing air cables. The aforementioned hydraulic-pneumatic switch 3 is connected to the air source 1 and the driller's control console 49 via the air cable. One air inlet of the hydraulic-pneumatic switch 3 is connected to the air source 1 via the first air cable connection assembly and the air source processing element 2, and the air source 1 can provide compressed air to the hydraulic-pneumatic switch 3. The other air inlet of the hydraulic-pneumatic switch 3 is connected to the driller's control console 49 via the first air cable connection assembly 45, the pneumatic pressure regulating valve 30, the first air inlet of the three-position four-way rotary valve 29, and the second air cable.

[0129] In this embodiment of the invention, the exhaust port of the liquid-gas switch 3 is connected to the air inlet of the air pump 4. The liquid-gas switch 3 can automatically control the start and stop of the air pump 4, specifically including:

[0130] When the oil pressure in the accumulator group 12 is too low, the hydraulic-pneumatic switch 3 controls the air pump 4 to start automatically, filling the hydraulic oil in the oil tank 33 into the accumulator group 12; when the oil pressure in the accumulator group 12 rises to its rated pressure, the hydraulic-pneumatic switch 3 controls the air pump 4 to stop operating automatically.

[0131] In this embodiment of the invention, a low-pressure connection assembly 48 is provided between the high-pressure pump unit and the oil tank 33.

[0132] In one or more alternative embodiments, the high-pressure control zone further includes a first pneumatic pressure transmitter 18;

[0133] The air inlet of the first pneumatic pressure transmitter 18 is connected to the driller's control console 49 via the first air cable connection assembly 45, the air filter pressure reducing valve 28, and the second air cable connection assembly 46; the exhaust port of the first pneumatic pressure transmitter 18 is connected to the driller's control console 49 via the first air cable connection assembly 45 and the second air cable connection assembly 46; the liquid inlet of the first pneumatic pressure transmitter 18 is connected to the high-pressure two-position three-way rotary valve 14 and the high-pressure pressure reducing valve 17 respectively, that is, connected to the hydraulic pipeline between the high-pressure two-position three-way rotary valve 14 and the high-pressure pressure reducing valve 17.

[0134] In this embodiment of the invention, the first pneumatic pressure transmitter 18 is used to convert the high-pressure oil pressure value in the hydraulic pipeline of the high-pressure control zone into the corresponding low-pressure air pressure value, which is then transmitted to the driller's control console 49 via an air cable to display the oil pressure value of the hydraulic pipeline in the high-pressure control zone.

[0135] In one or more optional embodiments, the above-mentioned atmospheric pressure control zone further includes a second pneumatic pressure transmitter 25, a third pneumatic pressure transmitter 26 and a fourth pneumatic pressure transmitter 27.

[0136] The air inlet of the second pneumatic pressure transmitter 25 is connected to the driller's control console 49 via an air filter pressure reducing valve 28 and a second air cable connection assembly 46; the air outlet of the second pneumatic pressure transmitter 25 is also connected to the driller's control console 49 via the second air cable connection assembly 46; the liquid inlet of the second pneumatic pressure transmitter 25 is connected to the high-pressure pressure reducing valve 17. The second pneumatic pressure transmitter 25 is used to convert the oil pressure value in the hydraulic pipeline of the atmospheric pressure control zone into a corresponding low-pressure air pressure value, which is then transmitted to the driller's control console 49 via an air cable to display the oil pressure value of the hydraulic pipeline in the atmospheric pressure control zone.

[0137] The air inlet of the third pneumatic pressure transmitter 26 is connected to the driller's control console 49 via an air filter pressure reducing valve 28 and a second air cable connection assembly 46; the air outlet of the third pneumatic pressure transmitter 26 is also connected to the driller's control console 49 via the second air cable connection assembly 46; the liquid inlet of the third pneumatic pressure transmitter 26 is connected to the second three-position four-way valve 24. The third pneumatic pressure transmitter 26 is used to convert the oil pressure value of the hydraulic line at the second three-position four-way valve 24 into a corresponding low-pressure air value, which is then transmitted to the driller's control console 49 via an air cable to display the oil pressure value of the hydraulic line at the second three-position four-way valve 24.

[0138] The air inlet of the fourth pneumatic pressure transmitter 27 is connected to the driller's control console 49 via an air filter pressure reducing valve 28 and a second air cable connection assembly 46; the air outlet of the fourth pneumatic pressure transmitter 27 is connected to the driller's control console 49 via the second air cable connection assembly 46; the liquid inlet of the fourth pneumatic pressure transmitter 27 is connected to the first three-position four-way valve 23. The fourth pneumatic pressure transmitter 27 is used to convert the oil pressure value of the hydraulic line at the first three-position four-way valve 23 into a corresponding low-pressure air value, which is then transmitted to the driller's control console 49 via an air cable to display the oil pressure value of the hydraulic line at the first three-position four-way valve 23.

[0139] In one or more alternative embodiments, the control device further includes a first pressure gauge 34, a second pressure gauge 35, a third pressure gauge 36, a fourth pressure gauge 37, a fifth pressure gauge 38, and a sixth pressure gauge 39.

[0140] In this embodiment of the invention, a first pressure gauge 34 is installed at the exhaust port of the gas source processing element 2 and is connected to the gas source processing element 2 and the liquid-gas switch 3, respectively, to display the pressure value of the pneumatic control pipeline at the exhaust port of the gas source processing element 2.

[0141] The second pressure gauge 35 is installed in the hydraulic line between the high-pressure two-position three-way rotary valve 14 and the high-pressure reducing valve 17. It is connected to the inlet of the first pneumatic pressure transmitter 18, the high-pressure two-position three-way rotary valve 14 and the high-pressure reducing valve 17, respectively. It is used to display the pressure value of the hydraulic line between the high-pressure two-position three-way rotary valve 14 and the high-pressure reducing valve 17. The pressure value displayed by the second pressure gauge 35 is consistent with the pressure value transmitted by the first pneumatic pressure transmitter 18 to the driller's control console 49.

[0142] The third pressure gauge 36 is installed in the hydraulic line between the high-pressure two-position three-way rotary valve 14 and the high-pressure shear valve 15, and is connected to the high-pressure two-position three-way rotary valve 14 and the high-pressure shear valve 15 respectively, and is used to display the pressure value of the hydraulic line between the high-pressure two-position three-way rotary valve 14 and the high-pressure shear valve 15.

[0143] The fourth pressure gauge 37 is installed in the hydraulic line between the high pressure reducing valve 17 and the second pneumatic pressure transmitter 25. It is connected to the inlet of the high pressure reducing valve 17 and the second pneumatic pressure transmitter 25 respectively. It is used to display the pressure value of the hydraulic line between the high pressure reducing valve 17 and the second pneumatic pressure transmitter 25. The pressure value displayed by the fourth pressure gauge 37 is consistent with the pressure value transmitted by the second pneumatic pressure transmitter 25 to the driller's control console 49.

[0144] The fifth pressure gauge 38 is installed in the hydraulic line between the five second three-position four-way valves 24, and is connected to the inlet of the second three-position four-way valve 24 and the third pneumatic pressure transmitter 26 respectively. It is used to display the pressure value of the hydraulic line between the two-position three-way rotary valve 20 and the second three-position four-way valve 24. The pressure value displayed by the fifth pressure gauge 38 is consistent with the pressure value transmitted to the driller's control console 49 by the third pneumatic pressure transmitter 26.

[0145] The sixth pressure gauge 39 is installed in the hydraulic line between the second pressure regulating valve 22 and the first three-position four-way valve 23, and is connected to the inlet of the fourth pneumatic pressure transmitter 27, the second pressure regulating valve 22 and the first three-position four-way valve 23 respectively. It is used to display the pressure value of the hydraulic line between the second pressure regulating valve 22 and the first three-position four-way valve 23. The pressure value displayed by the sixth pressure gauge 39 is consistent with the pressure value transmitted by the fourth pneumatic pressure transmitter 27 to the driller's control console 49.

[0146] To provide a clearer explanation of the pilot-controlled hydraulic blowout preventer control device provided in the embodiments of the present invention, the process of implementing hydraulic blowout preventer control is described in detail below:

[0147] Before performing the well shut-in operation, inject sufficient hydraulic oil into the oil tank 33, turn on the motor 8, turn on the air source 1, and turn on the first one-way valve 7, the second one-way valve and each ball valve 31 in the control device;

[0148] The hydraulic oil in the oil tank 33 is pressurized by electric pump 6 and / or air pump 4 and charged into accumulator group 12. After the oil pressure in accumulator group 12 reaches the rated pressure of 35MPa, electric pump 6 and / or air pump 4 stop operating.

[0149] Based on the actual situation on site, determine whether a high-pressure shearing operation is necessary. If a high-pressure shearing operation is required, the specific process may include:

[0150] Hydraulic oil flows out from the accumulator group 12, and after being regulated to the first preset pressure value by the high pressure regulating valve 13, it flows to the inlet of the high pressure two-position three-way rotary valve 14.

[0151] The first cylinder 40 is controlled by the driller's control console 49 to control the direction of the high-pressure two-position three-way rotary valve 14, so that the hydraulic oil flows from the second drain port of the high-pressure two-position three-way rotary valve 14 to the inlet port of the high-pressure shear valve 15.

[0152] The second cylinder 41 is controlled by the driller's control console 49 to keep the high-pressure shear valve 15 in the closed position, thereby completing the control of the high-pressure shearing operation.

[0153] If high-pressure shearing is not required, only routine well shut-in procedures are needed. These procedures may include:

[0154] Hydraulic oil flows out from the accumulator group 12, and after being regulated to the first preset pressure value by the high pressure regulating valve 13, it flows to the inlet of the high pressure two-position three-way rotary valve 14.

[0155] The second cylinder 41 is controlled by the driller's control console 49 to control the direction of the high-pressure two-position three-way rotary valve 14, so that the hydraulic oil flows from the first drain port of the high-pressure two-position three-way rotary valve 14 to the atmospheric pressure control area after being depressurized by the high-pressure pressure reducing valve 17.

[0156] The hydraulic oil flowing to the atmospheric pressure control zone is regulated by the first pressure regulating valve 19 and then flows to the inlet of the two-position three-way rotary valve 20.

[0157] The third cylinder 42 is controlled by the driller's console 49 to control the direction of the two-position three-way rotary valve 20, and to control the hydraulic flow to the first three-position four-way valve 23 and / or the second three-position four-way valve 24.

[0158] The driller's control console 49 controls the action of the fourth cylinder 43 and / or any fifth cylinder 44 to control the first three-position four-way valve 23 and / or any second three-position four-way valve 24, so that the first three-position four-way valve 23 and / or the corresponding second three-position four-way valve 24 are in the closed position, thereby completing the control of the conventional well shut-in operation.

[0159] It should be noted that, depending on the actual situation on site, the control device can control the direction of the high-pressure two-position three-way rotary valve 14 to make the hydraulic oil flow to the high-pressure shear valve 15 or the normal pressure control area, or it can make the hydraulic oil flow to both the high-pressure shear valve 15 and the normal pressure control area at the same time.

[0160] Example 2

[0161] The present invention also provides an application of the pilot-controlled hydraulic blowout preventer control device described in Embodiment 1 above in hydraulic blowout preventer control.

[0162] In this embodiment of the invention, the specific process of implementing hydraulic blowout preventer control using the pilot control hydraulic blowout preventer control device can refer to the hydraulic blowout preventer control process implemented using the pilot control hydraulic blowout preventer control device in the above embodiment 1. The repeated parts will not be described again here.

[0163] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; under the concept of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the present invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pilot-controlled hydraulic blowout preventer control device, characterized in that, include: Accumulator group, driller's console, high-pressure control area and atmospheric pressure control area; The high-pressure control zone includes a high-pressure regulating valve, a high-pressure two-position three-way rotary valve, a first cylinder, a high-pressure shear valve, a second cylinder, a high-pressure reducing valve, and a first pneumatic pressure transmitter. The inlet of the high-pressure two-position three-way rotary valve is connected to the accumulator group via the high-pressure regulating valve. The first outlet of the high-pressure two-position three-way rotary valve is connected to the atmospheric pressure control zone via the high-pressure reducing valve. The second outlet of the high-pressure two-position three-way rotary valve is connected to the inlet of the high-pressure shear valve. The first cylinder is connected to both the high-pressure two-position three-way rotary valve and the driller's control console. The second cylinder is connected to both the high-pressure shear valve and the driller's control console. The accumulator group stores hydraulic oil at a preset high pressure. The inlet and outlet of the first pneumatic pressure transmitter are connected to the driller's control console, and the inlet of the first pneumatic pressure transmitter is connected to both the high-pressure two-position three-way rotary valve and the high-pressure reducing valve. The high-pressure regulating valve is used to regulate the pressure of the hydraulic oil to a first preset pressure value, and the high-pressure reducing valve is used to regulate the pressure of the hydraulic oil to a second preset pressure value, wherein the first preset pressure value is greater than the second preset pressure value. The driller's control console is used to control the action of the first cylinder to control the direction of the high-pressure two-position three-way rotary valve, so that the hydraulic oil flows to the high-pressure shear valve or the normal pressure control area. In addition, the second cylinder is controlled to operate so as to control the high-pressure shear valve to be in the open or closed position; The atmospheric pressure control zone includes: a first pressure regulating valve, a second pressure regulating valve, a two-position three-way rotary valve, a third cylinder, a first three-position four-way valve, a fourth cylinder, at least one second three-position four-way valve, at least one fifth cylinder, a second pneumatic pressure transmitter, a third pneumatic pressure transmitter, and a fourth pneumatic pressure transmitter; the inlet of the two-position three-way rotary valve is connected to the outlet of the high-pressure reducing valve via the first pressure regulating valve; the first outlet of the two-position three-way rotary valve is connected to the inlet of the first three-position four-way valve via the second pressure regulating valve; the second outlet of the two-position three-way rotary valve is connected to the inlet of the second three-position four-way valve; the third cylinder is connected to both the two-position three-way rotary valve and the driller. The control console; the fourth cylinder is connected to the first three-position four-way valve and the driller's control console respectively; the fifth cylinder is connected to the second three-position four-way valve and the driller's control console respectively; the air inlet and outlet of the second pneumatic pressure transmitter are connected to the driller's control console; the liquid inlet of the second pneumatic pressure transmitter is connected to the high-pressure reducing valve; the air inlet and outlet of the third pneumatic pressure transmitter are connected to the driller's control console; the liquid inlet of the third pneumatic pressure transmitter is connected to the second three-position four-way valve; the air inlet and outlet of the fourth pneumatic pressure transmitter are connected to the driller's control console; the liquid inlet of the fourth pneumatic pressure transmitter is connected to the first three-position four-way valve; The first pressure regulating valve is used to regulate the pressure of the hydraulic oil to a third preset pressure value, and the second pressure regulating valve is used to regulate the pressure of the hydraulic oil to a fourth preset pressure value, wherein the third preset pressure value is greater than the fourth preset pressure value; The driller's control console is used to control the operation of the third cylinder to control the direction of the two-position three-way rotary valve, so that the hydraulic oil flows to the first three-position four-way valve and / or the second three-position four-way valve; to control the operation of the fourth cylinder to control the first three-position four-way valve to be in the open or closed position; and to control the operation of the fifth cylinder to control the second three-position four-way valve to be in the open or closed position.

2. The control device according to claim 1, characterized in that, It also includes an oil tank and a high-pressure pump unit; The high-pressure pump group is connected to the oil tank and the accumulator group respectively, and is used to charge the hydraulic oil in the oil tank into the accumulator group.

3. The control device according to claim 2, characterized in that, The high-pressure pump set includes at least one electric pump and at least one air pump.

4. The control device according to claim 3, characterized in that, It also includes the gas source and gas source processing components; The air source is connected to the driller's control console, the first cylinder, the second cylinder, the third cylinder, the fourth cylinder, and the fifth cylinder via the air source processing element; The air source processing element is used to filter, demist, and regulate the pressure of the compressed air provided by the air source.

5. The control device according to claim 3, characterized in that, A first overflow valve is provided between the energy storage group and the electric pump; A high-pressure relief valve is provided between the accumulator group and the high-pressure pressure reducing valve.

6. The control device according to claim 3, characterized in that, It also includes a first pressure controller and a second pressure controller; The first pressure controller is connected to the electric pump and is used to control the start and stop of the electric pump; The second pressure controller is connected to the accumulator group and the electric pump respectively, and is used to monitor the pressure of the accumulator group.

7. The control device according to claim 4, characterized in that, It also includes liquid-gas switches; The liquid-gas switch is connected to the gas source and the gas pump, respectively. The liquid-gas switch is used to control the start and stop of the gas pump.

8. The control device according to claim 4, characterized in that, It also includes pneumatic pressure regulating valves and three-position four-way pneumatic rotary valves; The first air inlet of the three-position four-way rotary valve is connected to the driller's control console; The second air inlet of the three-position four-way rotary valve is connected to the pneumatic pressure regulating valve. The outlet of the three-position four-way rotary valve is connected to the second pressure regulating valve; The pneumatic pressure regulating valve is used to regulate the pressure of the compressed air to a sixth preset pressure value; The driller's console is used to control the direction of the three-position four-way air valve so that the compressed air flows to the second pressure regulating valve.

9. The control device according to claim 1, characterized in that, It also includes an air filter pressure reducing valve; The air filter pressure reducing valve inlet is connected to the driller's control console; The exhaust port of the air filter pressure reducing valve is connected to the air inlet of the first pneumatic pressure transmitter, the air inlet of the second pneumatic pressure transmitter, the air inlet of the third pneumatic pressure transmitter, and the air inlet of the fourth pneumatic pressure transmitter, respectively. The air filter pressure reducing valve is used to filter and reduce the pressure of compressed air.

10. The application of the pilot-controlled hydraulic blowout preventer control device according to any one of claims 1-9 in hydraulic blowout preventer control.

Images