CN117450125A - Pilot-controlled hydraulic blowout preventer control device and application - Google Patents

Abstract

The invention relates to a pilot-controlled hydraulic blowout preventer control device and application. The device comprises: the system comprises an energy accumulator set, a driller control console, a high-voltage control area and a normal-pressure control area; the high-pressure control area comprises a high-pressure regulating valve, a high-pressure two-position three-way rotary valve, a first cylinder, a high-pressure shearing valve, a second cylinder and a high-pressure reducing valve; the liquid inlet of the high-pressure two-position three-way rotary valve is connected with the accumulator group through a high-pressure regulating valve; the first liquid outlet of the high-pressure two-position three-way rotary valve is connected with the normal pressure control area through a high-pressure reducing valve; the second liquid outlet of the high-pressure two-position three-way rotary valve is connected with the liquid inlet of the high-pressure shear valve; the first cylinder is respectively connected with the high-pressure two-position three-way rotary valve and the driller control console; the second cylinder is respectively connected with the high-pressure shear valve and the driller control console; the driller control console is used for controlling the action of the first air cylinder to control the steering of the high-pressure two-position three-way rotary valve so that hydraulic oil flows to the high-pressure shear valve or the normal-pressure control area; and controlling the second cylinder to act so as to control the high-pressure shear valve to be in an open position or a closed position.

Description

Pilot-controlled hydraulic blowout preventer control device and application

Technical Field

The invention relates to the technical field of well control in the petroleum industry, in particular to a pilot-controlled hydraulic blowout preventer control device and application.

Background

The hydraulic blowout preventer is a necessary safety device for preventing blowout in petroleum and natural gas drilling, and the hydraulic blowout preventer can be controlled to be closed by operating a hydraulic blowout preventer control device.

The existing hydraulic blowout preventer control device mainly comprises a remote control console, a hydraulic pipeline, a driller control console (or an HMI operation panel or a button box), an air pipe and the like, wherein the remote control console mainly comprises an energy accumulator group, a pressure reducing overflow valve, a three-position four-way valve, a pressure regulating valve, an electric pump, an air pump, a hydraulic manifold and the like. The rated pressure of the accumulator group of the hydraulic blowout preventer control device is 21MPa, and in case of emergency, when the well needs to be shut in, the conventional blowout prevention operation is usually performed on a driller control console in a remote control manner, so that the hydraulic oil with the pressure of 21MPa in the accumulator group is depressurized through a depressurization overflow valve and a pressure regulating valve in a manifold and then is used for closing the hydraulic blowout preventer at the wellhead through a three-position four-way valve.

With the gradual increase of deep wells and ultra-deep wells in petroleum exploration and development, stratum conditions are increasingly complex, dangerous case disposal difficulty is increased, and new requirements are put forward on the output pressure of a hydraulic blowout preventer control device. The output pressure of the existing hydraulic blowout preventer control device cannot provide enough shear force for the hydraulic blowout preventer, and the drilling tools such as high-steel-level drilling rods, drilling rod joints, drill collars and the like are sheared; if it is required to provide the hydraulic blowout preventer with a high pressure higher than the rated pressure of the existing hydraulic blowout preventer control apparatus, it is required to temporarily increase the output pressure of the hydraulic blowout preventer control apparatus by means of pressurization by a pneumatic pump, which is complicated to operate and may cause delay of the optimal timing for shutting in the well.

Disclosure of Invention

As a first aspect of an embodiment of the present invention, the present invention provides a pilot-controlled hydraulic blowout preventer control apparatus including:

the system comprises an energy accumulator set, a driller control console, a high-voltage control area and a normal-pressure control area;

the high-pressure control area comprises a high-pressure regulating valve, a high-pressure two-position three-way rotary valve, a first cylinder, a high-pressure shearing valve, a second cylinder and a high-pressure reducing valve;

the liquid inlet of the high-pressure two-position three-way rotary valve is connected with the energy accumulator group through the high-pressure regulating valve;

the first liquid outlet of the high-pressure two-position three-way rotary valve is connected with the normal pressure control area through the high-pressure reducing valve;

the second liquid outlet of the high-pressure two-position three-way rotary valve is connected with the liquid inlet of the high-pressure shear valve;

the first cylinder is respectively connected with the high-pressure two-position three-way rotary valve and the driller control console;

the second cylinder is respectively connected with the high-pressure shear valve and the driller control console;

the energy accumulator group is used for storing hydraulic oil with preset high pressure;

the high-pressure regulating valve is used for regulating and controlling the pressure of the hydraulic oil to a first preset pressure value, and the high-pressure reducing valve is used for regulating and controlling the pressure of the hydraulic oil to a second preset pressure value, and the first preset pressure value is larger than the second preset pressure value;

The driller control console is used for controlling the first cylinder to act so as to control the steering 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; and controlling the second cylinder to act so as to control the high-pressure shear valve to be in an open position or a closed position.

In one or some alternative embodiments, the atmospheric control zone comprises:

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;

the liquid inlet of the two-position three-way rotary valve is connected with the liquid outlet of the high-pressure reducing valve through the first pressure regulating valve;

the first liquid outlet of the two-position three-way rotary valve is connected with the liquid inlet of the first three-position four-way valve through the second pressure regulating valve;

the second liquid outlet of the two-position three-way rotary valve is connected with the liquid inlet of the second three-position four-way valve;

the third cylinder is respectively connected with the two-position three-way rotary valve and the driller control console;

the fourth cylinder is respectively connected with the first three-position four-way valve and the driller control console;

the fifth cylinder is respectively connected with the second three-position four-way valve and the driller control console;

The first pressure regulating valve is used for regulating and controlling the pressure of the hydraulic oil to a third preset pressure value, the second pressure regulating valve is used for regulating and controlling the pressure of the hydraulic oil to a fourth preset pressure value, and the third preset pressure value is larger than the fourth preset pressure value;

the driller control console is used for controlling the third cylinder to act so as to control the steering 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; controlling the action of the fourth cylinder to control the first three-position four-way valve to be in an open position or a closed position; and controlling the action of the fifth cylinder to control the second three-position four-way valve to be in an open position or a closed position.

In one or some alternative embodiments, the control device further comprises a tank and a high pressure pump stack;

the high-pressure pump is respectively connected with the oil tank and the energy accumulator group and is used for charging the hydraulic oil in the oil tank into the energy accumulator group.

In one or some alternative embodiments, the high pressure pump assembly includes at least one electric pump and at least one air pump.

In one or some alternative embodiments, the control device further comprises a gas source and a gas source processing element;

The air source is connected with the driller control console, the first air cylinder, the second air cylinder, the third air cylinder, the fourth air cylinder and the fifth air cylinder through the air source processing element;

the air source treatment element is used for filtering, demisting and pressure regulating compressed air provided by the air source.

In one or some alternative embodiments, a first relief valve is provided between the accumulator set and the electric pump;

and a high-pressure overflow valve is arranged between the energy accumulator group and the high-pressure reducing valve.

In one or some alternative embodiments, the control device further comprises a first pressure controller and a second pressure controller;

the first pressure controller is connected with the electric pump and used for controlling the start and stop of the electric pump;

the second pressure controller is respectively connected with the energy accumulator group and the electric pump and is used for monitoring the pressure of the energy accumulator group.

In one or some alternative embodiments, the control device further comprises a hydro-pneumatic switch;

the liquid-air switch is respectively connected with the air source and the air pump;

the liquid-gas switch is used for controlling the start and stop of the air pump.

In one or some alternative embodiments, the high pressure control zone further comprises a first pneumatic pressure transmitter;

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

In one or some alternative embodiments, the atmospheric control region further comprises a second pneumatic pressure transmitter, a third pneumatic pressure transmitter, and a fourth pneumatic pressure transmitter;

the air inlet and the air outlet of the second pneumatic pressure transmitter are connected with the driller control console; the liquid inlet of the second pneumatic pressure transmitter is connected with the high-pressure reducing valve;

the air inlet and the air outlet of the third pneumatic pressure transmitter are connected with the driller control console; the liquid inlet of the third pneumatic pressure transmitter is connected with the second three-position four-way valve;

the air inlet and the air outlet of the fourth pneumatic pressure transmitter are connected with the driller control console; and a liquid inlet of the fourth pneumatic pressure transmitter is connected with the first three-position four-way valve.

In one or some alternative embodiments, the control device further comprises a pneumatic pressure regulating valve and a three-position four-way ventilation rotary valve;

the first air inlet of the three-position four-way ventilation rotary valve is connected with the driver console;

The second air inlet of the three-position four-way ventilation rotary valve is connected with the pneumatic pressure regulating valve;

the air outlet of the three-position four-way ventilation rotary valve is connected with the second pressure regulating valve;

the pneumatic pressure regulating valve is used for regulating and controlling the pressure of the compressed air to a sixth preset pressure value;

the driller control console is used for controlling the steering of the three-position four-way air-turning valve so that the compressed air flows to the second pressure regulating valve.

In one or some alternative embodiments, the control device further comprises an air filtration pressure relief valve;

the air inlet of the air filtering pressure reducing valve is connected with the driller control console;

the air outlet of the air filtering pressure reducing valve is respectively connected with 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;

the air filtering and reducing valve is used for filtering and reducing the pressure of the compressed air.

As a second aspect of embodiments of the present invention, the present invention provides the use of a pilot-controlled hydraulic blowout preventer control unit in hydraulic blowout preventer control.

According to the pilot-controlled hydraulic blowout preventer control device provided by the embodiment of the invention, the high-pressure shear valve is independently arranged in the high-pressure control area, hydraulic oil is depressurized by the high-pressure relief valve and then enters the normal-pressure control area, the high-pressure shear valve is pilot-controlled by the hydraulic oil in the high-pressure control area, when the hydraulic blowout preventer needs to be operated under high pressure and large liquid amount, the high pressure can be directly provided, the effectiveness and safety of well closing operation under emergency conditions are ensured, and the on-site management is facilitated. The high-pressure hydraulic oil is provided for the high-pressure shear valve through the energy accumulator group, so that the problems that the shearing and well closing shearing force is insufficient and the drilling tool cannot be sheared due to low rated pressure of the blowout preventer control device, and the problem that the well cannot be closed under emergency conditions caused by rapid pressure loss, insufficient residual pressure and liquid quantity in the conventional well closing operation process are solved.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated.

FIG. 1 is a schematic diagram of a pilot-controlled hydraulic blowout preventer control unit according to an embodiment of the present invention.

In the figure:

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

Detailed Description

In order that the invention may be readily understood, a more particular description thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings. It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or one or more intervening elements may be present therebetween. The terms "upper," "lower," "inner," "outer," "vertical," "horizontal," and the like as used in this specification, refer to an orientation or positional relationship based on that shown in the drawings, merely for convenience of description and to simplify the description, and do not denote or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of 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.

In addition, the technical features mentioned in the different embodiments of the invention described below can be combined with one another as long as they do not conflict with one another.

The inventors have found that the rated pressure of current blowout preventer controls is typically 21MPa, but have found through experimentation that a control pressure of about 28MPa is required to successfully complete the shearing operation of certain large-size, high wall thickness drill pipes, far exceeding the rated pressure of 21MPa for conventional controls. If the emergency needs to shut in the well, the shearing position is not correct, or the shearing position is the position of the drill rod joint and the like, the control pressure is higher than 28 MPa. When such special conditions are met on site, the existing blowout preventer control device needs to temporarily increase the output pressure of the control device through a pneumatic pump pressurization mode, the operation is complex in the mode, the energy storage device group needs to be isolated because the rated pressure of the energy storage device is 21MPa, and meanwhile, the bypass valve of the pneumatic pump is opened, and errors in any link can possibly cause delay of the optimal well closing time, so that huge potential hidden hazards and risks are brought to well control safety. In addition, the use of high pressure blowout preventer stack also brings about an increase in the amount of high pressure fluid required to control the pressure rise, and existing blowout preventer controls have failed to meet the pressure required by high pressure blowout preventer stack.

Chinese patent publication No.: CN101555777, provides a "surface blowout preventer control unit". In order to prevent blowout in the drilling process, the remote control console and the driller control console are connected through an air pipe, and a three-position four-way air rotating valve on the driller control console is controlled to operate the three-position four-way valve on the remote control console through air correspondence to change direction, so that the opening or closing of the blowout preventer flashboard is pushed, and the purpose of remotely controlling the opening or closing of the blowout preventer flashboard by the driller control console is achieved. When the special condition that needs high-pressure shearing is met on site, the ground blowout preventer control device needs to temporarily increase output pressure through a pneumatic pump pressurizing mode, the mode is complex to operate, delay of the optimal well closing time is possibly caused, the rated pressure of the device is 21MPa, and the requirement of a high-pressure blowout preventer set cannot be met.

Chinese patent publication No.: CN201057015, which provides an "electronically controlled surface blowout preventer control unit". The control signal transmission of the control operation of the ground blowout preventer is reliable, the action is sensitive, and the rotary valve position of the remote station can be displayed through the signal of the magnetic switch. Although the electric control type ground blowout preventer control device is sensitive in action, the rated pressure is 21MPa, and the pressure requirement of cutting high-steel-level drilling rods, drilling rod joints, drill collars and other drilling tools cannot be met.

Example 1

The embodiment of the invention provides a pilot-controlled hydraulic blowout preventer control device, which is shown by referring to FIG. 1 and comprises an energy accumulator group 12, a driller control console 49, a high-pressure control area and a normal-pressure control area;

the high-pressure control area comprises a high-pressure regulating valve 13, a high-pressure two-position three-way rotary valve 14, a first cylinder 40, a high-pressure shearing valve 15, a second cylinder 41 and a high-pressure reducing valve 17;

the liquid inlet of the high-pressure two-position three-way rotary valve 14 is connected with the accumulator group 12 through the high-pressure regulating valve 13;

the first liquid outlet of the high-pressure two-position three-way rotary valve 14 is connected with a normal pressure control area through a high-pressure reducing valve 17;

the second liquid outlet of the high-pressure two-position three-way rotary valve 14 is connected with the liquid inlet of the high-pressure shear valve 15;

the first cylinder 40 is connected with the high-pressure two-position three-way rotary valve 14 and the driller's console 49 respectively;

the second cylinder 41 is connected to the high pressure shear valve 15 and driller's console 49, respectively;

the accumulator group 12 is used for storing hydraulic oil with preset high pressure;

the high-pressure regulating valve 13 is used for regulating and controlling the pressure of hydraulic oil to a first preset pressure value, the high-pressure reducing valve 17 is used for regulating and controlling the pressure of the hydraulic oil to a second preset pressure value, and the first preset pressure value is larger than the second preset pressure value;

the driller control console 49 is used for controlling the first cylinder 40 to act so as to control the steering of the high-pressure two-position three-way rotary valve 14, so that hydraulic oil flows to the high-pressure shear valve 15 or the normal-pressure control area; and, the second cylinder 41 is controlled to operate to control the high pressure shear valve 15 to be in the open position or the closed position.

According to the pilot-controlled hydraulic blowout preventer control device provided by the embodiment of the invention, after hydraulic oil flows out of the accumulator group 12, the hydraulic oil flows to the high-pressure two-position three-way pressure reducing valve after being regulated and controlled to a first preset pressure value through the high-pressure regulating valve 13, wherein the first preset pressure value is set according to the pressure required by a control object of the high-pressure shearing valve 15 in actual conditions, for example, if a large-size and high-wall-thickness drill rod is required to be sheared, the first preset pressure value is generally required to be set to 28MPa.

In the pilot-controlled hydraulic blowout preventer control device provided by the embodiment of the invention, the first cylinder 40 and the second cylinder 41 are connected with the driller control console 49 through an air pipe. When high-pressure shearing is required in the well shutting operation, hydraulic oil reaching a first preset pressure value flows to the high-pressure shearing valve 15 through the high-pressure two-position three-way rotary valve 14 by operating the driller control desk 49, and then the high-pressure shearing valve 15 is in a shut-in position by operating the driller control desk 49 so as to perform the well shutting high-pressure shearing operation; when the high-pressure shearing is not required in the well closing operation, the hydraulic oil reaching the first preset pressure value is depressurized by the high-pressure relief valve 17 and flows to the normal-pressure control area by operating the driller's control console 49.

In the embodiment of the present invention, after hydraulic oil flows into the high-pressure reducing valve 17, the hydraulic oil is reduced to a second preset pressure value through the high-pressure reducing valve 17. Since the rated pressure of the conventional general blowout preventer control apparatus is 21MPa, the second preset pressure value is set to 21MPa, that is, the pressure of the hydraulic oil flowing to the normal pressure control region is 21MPa.

In the embodiment of the invention, a plurality of ball valves 31 and a plurality of oil filters 32 are arranged in a hydraulic pipeline of a hydraulic blowout preventer control device controlled by a pilot. The ball valve 31 is used for controlling the passage and blocking of the hydraulic pipeline, and before the well closing operation is carried out, the ball valve 31 in the hydraulic pipeline needs to be opened, so that the hydraulic pipeline of the hydraulic blowout preventer control device controlled by the whole pilot is in a passage state, and the hydraulic oil can be ensured to smoothly flow through the hydraulic pipeline; the oil filter 32 is used for filtering hydraulic oil to prevent the accumulation of impurities in the hydraulic oil and thus to prevent clogging.

In the embodiment of the present invention, the accumulator set 12 includes a plurality of accumulator bottles 121 connected to each other, and ball valves 31 are respectively disposed at the pipe orifices of the accumulator bottles 121, where the rated pressure of the accumulator set 12 is 35MPa, so that high-pressure hydraulic oil with a pressure of 35MPa can be provided.

In one or some alternative embodiments, referring to fig. 1, the pilot-controlled hydraulic blowout preventer control apparatus provided by the embodiments of the present invention further includes an oil tank 33 and a high-pressure pump set;

The high-pressure pump group is connected to the oil tank 33 and the accumulator group 12, respectively;

the oil tank 33 is used for replenishing the hydraulic oil;

the high-pressure pump group is used to charge the accumulator group 12 with hydraulic oil in the tank 33.

The high-pressure pump group comprises at least one electric pump 6 and at least one air pump 4.

In the embodiment of the invention, the high-pressure pump set comprises an electric pump 6 and two air pumps 4, wherein a first one-way valve 7 is arranged at the liquid outlet of the electric pump 6, and a second one-way valve 5 is arranged at the liquid outlet of the two air pumps 4. The oil tank 33 is provided with three drain ports corresponding to one electric pump 6 and two air pumps 4, respectively, and the three drain ports are provided with a ball valve 31 and an oil filter 32, respectively. 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 drain port and the third drain port are respectively connected to the two air pumps 4 via the ball valve 31 and the oil filter 32.

The energy accumulator group 12 is connected with a liquid outlet of the electric pump 6 through the first one-way valve 7; the accumulator group 12 is connected with an oil drain port of the air pump 4 through a ball valve 31 and a second one-way valve 5; the accumulator set 12 is connected with a liquid inlet of the high-pressure regulating valve 13 through the ball valve 31 and the oil filter 32, a liquid outlet of the high-pressure regulating valve 13 is connected with a liquid inlet of the high-pressure reducing valve 17 through the oil filter 32, and a liquid outlet of the high-pressure reducing valve 17 is connected with a normal pressure control area.

In the embodiment of the present invention, the process of storing and supplementing hydraulic oil using the pilot-controlled hydraulic blowout preventer control device provided by the embodiment of the present invention may include:

hydraulic oil in the oil tank 33 passes through the ball valve 31 and the oil filter 32 and then enters the electric pump 6 and/or the air pump 4;

the hydraulic oil is boosted by the electric pump 6 and/or the air pump 4 and charged into the accumulator group 12;

when the oil pressure of the accumulator set 12 rises to 35MPa, the electric pump 6 and/or the air pump 4 stops operating;

when the oil pressure in the accumulator set 12 decreases too much, the electric pump 6 and/or the air pump 4 is automatically activated to replenish the pressure oil into the accumulator set 12.

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

In one or some alternative embodiments, the high pressure control zone further includes a first relief valve 11 and a high pressure relief valve 16. A first overflow valve 11 is arranged between the accumulator set 12 and the electric pump 6 and is used for protecting the accumulator set 12 and a hydraulic pipeline between the accumulator set 12 and the high-pressure pump set, so as to prevent the accumulator set 12 and the hydraulic pipeline from being damaged due to overlarge oil pressure in the section of hydraulic pipeline; a high-pressure overflow valve 16 is arranged between the accumulator set 12 and the high-pressure relief valve 17 and is used for protecting the accumulator set 12 and a hydraulic pipeline between the accumulator set 12 and the high-pressure relief valve 17 and preventing the accumulator set 12 and the hydraulic pipeline from being damaged due to overlarge oil pressure in the section of hydraulic pipeline.

In one or some alternative embodiments, as shown with reference to fig. 1, the high voltage control area further includes a motor 8; the motor 8 is connected to the electric pump 6 and is capable of providing electric energy to the electric pump 6. Before the control device is used for well closing operation, the motor 8 is turned on, and the electric pump 6 can work normally.

In one or some alternative embodiments, the atmospheric control zone comprises: the first pressure regulating valve 19, the second pressure regulating valve 22, the two-position three-way rotary valve 20, the third cylinder 42, the first three-position four-way valve 23, the fourth cylinder 43, the at least one second three-position four-way valve 24 and the at least one fifth cylinder 44;

the liquid inlet of the two-position three-way rotary valve 20 is connected with the liquid outlet of the high-pressure reducing valve 17 through the first pressure regulating valve 19;

the first liquid outlet of the two-position three-way rotary valve 20 is connected with the liquid inlet of the first three-position four-way valve 23 through the second pressure regulating valve 22;

the second liquid outlet of the two-position three-way rotary valve 20 is connected with the liquid inlet of the second three-position four-way valve 24;

the third cylinder 42 is connected with the two-position three-way rotary valve 20 and the driller's console 49 respectively;

the fourth cylinder 43 is respectively connected with the first three-position four-way valve 23 and the driller's console 49;

the fifth cylinder 44 is respectively connected with the second three-position four-way valve 24 and the driller's console 49;

the first pressure regulating valve 19 is configured to regulate the pressure of the hydraulic oil to a third preset pressure value, and the second pressure regulating valve 22 is configured to regulate the pressure of the hydraulic oil to a fourth preset pressure value, where the third preset pressure value is greater than the fourth preset pressure value;

The driller control console 49 is configured to control the third air cylinder 42 to act to control the steering 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; controlling the fourth cylinder 43 to operate to control the first three-position four-way valve 23 to be in an open position or a closed position; and controlling the action of the fifth cylinder 44 to control the second three-position four-way valve 24 to be in an open position or a closed position.

In the embodiment of the present invention, the control object of the first three-position four-way valve 23 is an annular blowout preventer.

In the embodiment of the present invention, five second three-position four-way valves 24 and five fifth cylinders 44 respectively connected with the five three-position four-way valves are provided, and the five fifth cylinders 44 are connected with a driller console 49 through an air pipe. The control object of the five three-position four-way valve is five ram blowout preventers corresponding to the control object, and the control object can be: a fully enclosed blowout preventer, an open blowout preventer, a backup blowout preventer, and at least one semi-enclosed blowout preventer.

In the embodiment of the invention, a liquid inlet of a first pressure regulating valve 19 is connected with a liquid outlet of a high-pressure reducing valve 17 through an oil filter 32 and a ball valve 31, and the liquid outlet of the first pressure regulating valve 19 is connected with a liquid inlet of a two-position three-way rotary valve 20; the first pressure regulating valve 19 can regulate the pressure of the passing hydraulic oil to a third preset pressure value, and the third preset pressure value is set according to the pressure setting required by the control object of the second three-position four-way valve 24 in actual situations, and is generally set to 21MPa, so that the pressure requirement of the control object of the five second three-position four-way valves 24 is satisfied.

In the embodiment of the invention, the liquid inlet of the second pressure regulating valve 22 is connected with the first liquid outlet of the two-position three-way rotary valve 20, and the liquid outlet of the second pressure regulating valve 22 is connected with the liquid inlet of the first three-position four-way valve 23; the second pressure regulating valve 22 can regulate the pressure of the passing hydraulic oil to a fourth preset pressure value, and the fourth preset pressure value is set according to the pressure value required by the control object of the first three-position four-way valve 23 in an actual situation, and can be set to 10.5MPa, so that the pressure requirement of the control object of the first three-position four-way valve 23 can be met.

In the embodiment of the invention, the hydraulic oil which is depressurized to 21MPa by the high-pressure depressurization 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, and the flow direction of the hydraulic oil is controlled according to the actual condition of the site by operating the driller control console 49, 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.

In one or some alternative embodiments, the atmospheric control zone further comprises a second relief valve 21; the liquid inlet of the second overflow valve 21 is connected with the high-pressure reducing valve 17, and the liquid outlet is connected with the second pressure regulating valve 22; the second relief valve 21 is used to protect the hydraulic line between the high-pressure relief valve 17 and the second pressure regulating valve 22 from damage due to excessive pressure.

An atmospheric pressure coupling assembly 47 is provided between the hydraulic lines of the high pressure control zone and the hydraulic lines of the atmospheric pressure operation zone in the embodiment of the present invention.

In one or some alternative embodiments, the control device further comprises a gas supply 1 and a gas supply processing element 2;

the air source 1 is connected with a driller control console 49, a first air cylinder 40, a second air cylinder 41, a third air cylinder 42, a fourth air cylinder 43 and a fifth air cylinder 44 through the air source processing element 2;

the air source 1 is used for providing compressed air for a driller's control console 49, a first air cylinder 40, a second air cylinder 41, a third air cylinder 42, a fourth air cylinder 43 and a fifth air cylinder 44;

the air source treatment element 2 is used for filtering, demisting and pressure regulating the compressed air provided by the air source 1.

In the embodiment of the present invention, the air source 1 is connected to the driller control platform 49, the first air cylinder 40, the second air cylinder 41, the third air cylinder 42, the fourth air cylinder 43 and the fifth air cylinder 44 through air pipes, a first air pipe connecting assembly 45 is disposed between the air source 1 and the driller control platform 49, the first air cylinder 40, the second air cylinder 41, the third air cylinder 42 and the fourth air cylinder 43, and compressed air flows into the first air pipe connecting assembly 45 after being output from the air source 1 and processed by the air source processing element 2, and flows to various places through the first air pipe connecting assembly 45.

In the embodiment of the invention, the compressed air provided by the air source 1 is used for realizing the pneumatic control of the control device. The air source treatment element 2 is arranged at the air outlet of the air source 1, can filter, defog and regulate the pressure of the compressed air output by the air source 1, ensures the purity of the compressed air, avoids blocking the control device, regulates the pressure of the compressed air to be between 0.6MPa and 0.8MPa, and meets the pressure requirement of pneumatic control of the control device.

In one or some alternative embodiments, the control device further comprises a first pressure controller 9 and a second pressure controller 10; the first pressure controller 9 is connected with the electric pump 6 and is used for controlling the start and stop of the electric pump 6; the second pressure controller 10 is connected to the accumulator set 12 and the electric pump 6, respectively, for monitoring the pressure of the accumulator set 12.

In the embodiment of the present invention, the first pressure controller 9 can automatically control the start and stop of the electric pump 6, and specifically may include:

when the oil pressure in the accumulator set 12 is too small, the first pressure controller 9 controls the electric pump 6 to be automatically started, and hydraulic oil in the oil tank 33 is charged into the accumulator set 12; when the oil pressure in the accumulator set 12 increases to its rated pressure, the first pressure controller 9 controls the electric pump 6 to stop automatically.

In the embodiment of the present invention, the second pressure controller 10 can send out an alarm when the oil pressure in the accumulator set 12 and the hydraulic line is too high, so as to monitor whether the control device is safely operated. For example, when the electric pump 6 or the air pump 4 fails, the second pressure controller 10 may issue an alarm to indicate that a failure has occurred when the oil pressure in the hydraulic line between the high-pressure pump group and the accumulator group 12 exceeds the rated pressure of the accumulator group 12.

In one or some alternative embodiments, the control device further comprises a pneumatic pressure regulating valve 30 and a three-position four-way ventilation rotary valve 29; the first air inlet of the three-position four-way air transfer valve 29 is connected with the control console; the second air inlet of the three-position four-way ventilation rotary valve 29 is connected with the pneumatic pressure regulating valve 30; the air outlet of the three-position four-way air-turning valve 29 is connected with the second pressure regulating valve 22; the pneumatic pressure regulating valve 30 is used for regulating and controlling the pressure of the compressed air to a sixth preset pressure value; the driller's control console 49 is used to control the turning of the three-position four-way switching valve 29 to cause the compressed air to flow to the second pressure regulating valve 22.

In one or some alternative embodiments, the control device further includes an air filtration pressure relief valve 28; an air inlet of the air filtering and reducing valve 28 is connected with the driller's console 49; the exhaust port of the air filtering pressure reducing valve 28 is connected to the air inlet of the first pneumatic pressure transmitter 18, the air inlet of the second pneumatic pressure transmitter 25, the air inlet of the third pneumatic pressure transmitter 26 and the air inlet of the fourth pneumatic pressure transmitter 27, respectively. The air filter pressure reducing valve 28 is used to filter and reduce the pressure of the compressed air.

In one or some alternative embodiments, the control device further comprises a liquid device switch, and the liquid-air switch 3 is respectively connected with the air source 1 and the air pump 4 and used for controlling the start and stop of the air pump 4.

In an embodiment of the present invention, a second air line cable coupling assembly 46 is provided on the air line cable near the driller's console 49, the second air line cable coupling assembly 46 funneling through the air line cable. The liquid-gas switch 3 is connected with the air source 1 and the driller's console 49 through an air pipe; the air inlet of the liquid-gas switch 3 is connected with the air source 1 through the first air pipe connecting assembly and the air source treatment element 2, and the air source 1 can provide compressed air for the liquid-gas switch 3. The other path of air inlet of the liquid-air switch 3 is connected with a driller control console 49 through a first air pipe connecting assembly 45, a pneumatic pressure regulating valve 30 and a first air inlet and a second air pipe of the three-position four-way ventilation rotary valve 29.

In the embodiment of the invention, the exhaust port of the liquid-air switch 3 is connected with 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, and specifically can comprise:

when the oil pressure in the accumulator set 12 is too small, the liquid-gas switch 3 controls the air pump 4 to be automatically started, and hydraulic oil in the oil tank 33 is charged into the accumulator set 12; when the oil pressure in the accumulator set 12 rises to the rated pressure, the liquid-gas switch 3 controls the air pump 4 to stop running automatically.

In an embodiment of the present invention, a low pressure coupling assembly 48 is provided between the high pressure pump stack and the tank 33.

In one or some alternative embodiments, the high pressure control zone further includes a first pneumatic pressure transmitter 18;

the air inlet of the first pneumatic pressure transducer 18 is connected to a driller's console 49 through a first air line coupling assembly 45, an air filtration pressure relief valve 28, and a second air line coupling assembly 46; the vent of the first pneumatic pressure transducer 18 connects to the driller's console 49 via a first air line cable connection assembly 45 and a second air line cable connection assembly 46; the liquid inlet of the first pneumatic pressure transmitter 18 is respectively connected with the high-pressure two-position three-way rotary valve 14 and the high-pressure reducing valve 17, namely, is connected with a hydraulic pipeline between the high-pressure two-position three-way rotary valve 14 and the high-pressure reducing valve 17.

In the embodiment of the present invention, the first pneumatic pressure transmitter 18 is configured to convert a high-pressure oil pressure value in the hydraulic pipeline of the high-pressure control area into a corresponding low-pressure air pressure value, and send the low-pressure air pressure value to the driller console 49 through the air pipe cable to display the oil pressure value of the hydraulic pipeline of the high-pressure control area.

In one or some alternative embodiments, the atmospheric control region further includes a second pneumatic pressure transmitter 25, a third pneumatic pressure transmitter 26, and a fourth pneumatic pressure transmitter 27;

The air inlet of the second pneumatic pressure transducer 25 is connected to a driller's console 49 through an air filtration pressure relief valve 28 and a second air line coupling assembly 46; the air outlet of the second pneumatic pressure transducer 25 is connected to the driller's console 49 via a second air line cable connection assembly 46; the liquid inlet of the second pneumatic pressure transmitter 25 is connected with the high-pressure reducing valve 17. The second pneumatic pressure transmitter 25 is used for converting the oil pressure value in the hydraulic pipeline in the normal pressure control area into a corresponding low pressure air pressure value, and displaying the oil pressure value of the hydraulic pipeline in the normal pressure control area after the oil pressure value is transmitted to the driller control console 49 through the air pipe.

The air inlet of the third pneumatic pressure transducer 26 is connected to a driller's console 49 through an air filter relief valve 28 and a second air line cable tie assembly 46; the air outlet of the third pneumatic pressure transducer 26 is connected to the driller's console 49 via a second air line 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 configured to convert the hydraulic pressure value of the hydraulic line at the second three-position four-way valve 24 into a corresponding low-pressure air pressure value, and send the low-pressure air pressure value to the driller's console 49 through the air cable to display the hydraulic pressure value of the hydraulic line at the second three-position four-way valve 24.

The air inlet of the fourth pneumatic pressure transducer 27 is connected to a driller's console 49 through an air filter pressure relief valve 28 and a second air line coupling assembly 46; the air outlet of the fourth pneumatic pressure transducer 27 is connected to the driller's console 49 via a second air line 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 for converting the oil pressure value of the hydraulic pipeline at the first three-position four-way valve 23 into a corresponding low-pressure air pressure value, and displaying the oil pressure value of the hydraulic pipeline at the first three-position four-way valve 23 after the oil pressure value is transmitted to the driller console 49 through an air pipe.

In one or some 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.

In the embodiment of the invention, the first pressure gauge 34 is arranged at the exhaust port of the air source processing element 2, and is respectively connected with the air source processing element 2 and the liquid-air switch 3, and is used for displaying the pressure value of the pneumatic control pipeline at the exhaust port of the air source processing element 2.

The second pressure gauge 35 is disposed in a hydraulic pipeline between the high-pressure two-position three-way rotary valve 14 and the high-pressure reducing valve 17, and is respectively connected to the liquid 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, and is used for displaying the pressure value of the hydraulic pipeline between the high-pressure two-position three-way rotary valve 14 and the high-pressure reducing valve 17, and the pressure value displayed by the second pressure gauge 35 is consistent with the pressure value transmitted to the driller control console 49 by the first pneumatic pressure transmitter 18.

The third pressure gauge 36 is disposed in the hydraulic pipeline between the high-pressure two-position three-way rotary valve 14 and the high-pressure shear valve 15, and is respectively connected to the high-pressure two-position three-way rotary valve 14 and the high-pressure shear valve 15, for displaying the pressure value of the hydraulic pipeline between the high-pressure two-position three-way rotary valve 14 and the high-pressure shear valve 15.

The fourth pressure gauge 37 is disposed in the hydraulic pipeline between the high-pressure reducing valve 17 and the second pneumatic pressure transmitter 25, and is respectively connected to the liquid inlets of the high-pressure reducing valve 17 and the second pneumatic pressure transmitter 25, and is used for displaying the pressure value of the hydraulic pipeline between the high-pressure reducing valve 17 and the second pneumatic pressure transmitter 25, and the pressure value displayed by the fourth pressure gauge 37 is consistent with the pressure value transmitted to the driller control console 49 by the second pneumatic pressure transmitter 25.

The fifth pressure gauge 38 is disposed in the hydraulic pipeline between the five second three-position four-way valves 24, and is respectively connected to the liquid inlets of the second three-position four-way valve 24 and the third pneumatic pressure transmitter 26, and is used for displaying the pressure value of the hydraulic pipeline between the two-position three-way rotary valve 20 and the second three-position four-way valve 24, and the pressure value displayed by the fifth pressure gauge 38 is consistent with the pressure value transmitted to the driller console 49 by the third pneumatic pressure transmitter 26.

The sixth pressure gauge 39 is disposed in the hydraulic pipeline between the second pressure regulating valve 22 and the first three-position four-way valve 23, and is respectively connected to the liquid inlet of the fourth pneumatic pressure transmitter 27, the second pressure regulating valve 22 and the first three-position four-way valve 23, and is used for displaying the pressure value of the hydraulic pipeline between the second pressure regulating valve 22 and the first three-position four-way valve 23, and the pressure value displayed by the sixth pressure gauge 39 is consistent with the pressure value transmitted to the driller control console 49 by the fourth pneumatic pressure transmitter 27.

In order to make a clearer description of the pilot-controlled hydraulic blowout preventer control device provided by the embodiment of the present invention, the following process for implementing the hydraulic blowout preventer control is described in detail as follows:

before the well closing operation is carried out, a sufficient amount of hydraulic oil is injected into the oil tank 33, the motor 8 is turned on, the air source 1 is turned on, and the first check valve 7, the second single valve and each ball valve 31 in the control device are turned on;

the hydraulic oil in the oil tank 33 is boosted by the electric pump 6 and/or the air pump 4 and is charged into the accumulator group 12, and the electric pump 6 and/or the air pump 4 stops running after the oil pressure in the accumulator group 12 reaches the rated pressure of 35 MPa;

judging whether to perform high-pressure shearing operation according to the actual situation of the site, if the high-pressure shearing operation is required, the specific process can comprise:

hydraulic oil flows out of the accumulator group 12, flows to a liquid inlet of the high-pressure two-position three-way rotary valve 14 after being regulated to a first preset pressure value through the high-pressure regulating valve 13;

the first cylinder 40 is controlled to act through the driller control console 49 to control the steering of the high-pressure two-position three-way rotary valve 14, so that hydraulic oil flows from the second liquid outlet of the high-pressure two-position three-way rotary valve 14 to the liquid inlet of the high-pressure shear valve 15;

the second cylinder 41 is controlled to act by the driller's control console 49 to control the high pressure shear valve 15 to be in the closed position, thereby completing the control of the high pressure shear operation.

If the high-pressure shearing operation is not needed, only the conventional well closing operation is needed, the specific process can comprise the following steps:

hydraulic oil flows out of the accumulator group 12, flows to a liquid inlet of the high-pressure two-position three-way rotary valve 14 after being regulated to a first preset pressure value through the high-pressure regulating valve 13;

the second cylinder 41 is controlled to act through the driller control console 49 to control the steering of the high-pressure two-position three-way rotary valve 14, so that hydraulic oil flows to the normal pressure control area after being depressurized from the first liquid outlet of the high-pressure two-position three-way rotary valve 14 through the high-pressure depressurization valve 17;

after the pressure of the hydraulic oil flowing to the normal pressure control area is regulated by the first pressure regulating valve 19, the hydraulic oil flows to a liquid inlet of the two-position three-way rotary valve 20;

the third cylinder 42 is controlled to act through the driller control console 49 so as to control the steering of the two-position three-way rotary valve 20 and control the hydraulic pressure to flow to the first three-position four-way valve 23 and/or the second three-position four-way valve 24;

the driller control console 49 controls the actions of the fourth air cylinder 43 and/or any fifth air 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 closing position, thereby completing the control of the conventional well closing operation.

The control device controls the steering of the high-pressure two-position three-way rotary valve 14 according to the actual situation of the site, so that hydraulic oil can flow to the high-pressure shear valve 15 or the normal pressure control area, and can also flow to the high-pressure shear valve 15 and the normal pressure control area at the same time.

Example two

The invention also provides an application of the pilot-controlled hydraulic blowout preventer control device in hydraulic blowout preventer control.

In the embodiment of the present invention, the specific process of implementing the hydraulic blowout preventer control by using the pilot-controlled hydraulic blowout preventer control device may refer to the implementation of the hydraulic blowout preventer control process by using the pilot-controlled hydraulic blowout preventer control device in the first embodiment, and the repetition is omitted herein.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; the technical features of the above embodiments or in the different embodiments may also be combined within the idea of the invention, the steps may be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims (13)

1. A pilot-controlled hydraulic blowout preventer control apparatus, comprising:

the system comprises an energy accumulator set, a driller control console, a high-voltage control area and a normal-pressure control area;

the high-pressure control area comprises a high-pressure regulating valve, a high-pressure two-position three-way rotary valve, a first cylinder, a high-pressure shearing valve, a second cylinder and a high-pressure reducing valve;

the liquid inlet of the high-pressure two-position three-way rotary valve is connected with the energy accumulator group through the high-pressure regulating valve;

the first liquid outlet of the high-pressure two-position three-way rotary valve is connected with the normal pressure control area through the high-pressure reducing valve;

the second liquid outlet of the high-pressure two-position three-way rotary valve is connected with the liquid inlet of the high-pressure shear valve;

the first cylinder is respectively connected with the high-pressure two-position three-way rotary valve and the driller control console;

the second cylinder is respectively connected with the high-pressure shear valve and the driller control console;

the energy accumulator group is used for storing hydraulic oil with preset high pressure;

the high-pressure regulating valve is used for regulating and controlling the pressure of the hydraulic oil to a first preset pressure value, and the high-pressure reducing valve is used for regulating and controlling the pressure of the hydraulic oil to a second preset pressure value, and the first preset pressure value is larger than the second preset pressure value;

The driller control console is used for controlling the first cylinder to act so as to control the steering 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; and controlling the second cylinder to act so as to control the high-pressure shear valve to be in an open position or a closed position.

2. The control device of claim 1, wherein the atmospheric control zone comprises:

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;

the liquid inlet of the two-position three-way rotary valve is connected with the liquid outlet of the high-pressure reducing valve through the first pressure regulating valve;

the first liquid outlet of the two-position three-way rotary valve is connected with the liquid inlet of the first three-position four-way valve through the second pressure regulating valve;

the second liquid outlet of the two-position three-way rotary valve is connected with the liquid inlet of the second three-position four-way valve;

the third cylinder is respectively connected with the two-position three-way rotary valve and the driller control console;

the fourth cylinder is respectively connected with the first three-position four-way valve and the driller control console;

The fifth cylinder is respectively connected with the second three-position four-way valve and the driller control console;

the first pressure regulating valve is used for regulating and controlling the pressure of the hydraulic oil to a third preset pressure value, the second pressure regulating valve is used for regulating and controlling the pressure of the hydraulic oil to a fourth preset pressure value, and the third preset pressure value is larger than the fourth preset pressure value;

the driller control console is used for controlling the third cylinder to act so as to control the steering 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; controlling the action of the fourth cylinder to control the first three-position four-way valve to be in an open position or a closed position; and controlling the action of the fifth cylinder to control the second three-position four-way valve to be in an open position or a closed position.

3. The control device of claim 1, further comprising a tank and a high pressure pump stack;

the high-pressure pump is respectively connected with the oil tank and the energy accumulator group and is used for charging the hydraulic oil in the oil tank into the energy accumulator group.

4. A control device according to claim 3, wherein the high pressure pump assembly comprises at least one electric pump and at least one air pump.

5. The control device of claim 1, further comprising a gas source and a gas source processing element;

the air source is connected with the driller control console, the first air cylinder, the second air cylinder, the third air cylinder, the fourth air cylinder and the fifth air cylinder through the air source processing element;

the air source treatment element is used for filtering, demisting and pressure regulating compressed air provided by the air source.

6. The control device of claim 4, wherein a first relief valve is disposed between the accumulator train and the electric pump;

and a high-pressure overflow valve is arranged between the energy accumulator group and the high-pressure reducing valve.

7. The control device of claim 4, further comprising a first pressure controller and a second pressure controller;

the first pressure controller is connected with the electric pump and used for controlling the start and stop of the electric pump;

the second pressure controller is respectively connected with the energy accumulator group and the electric pump and is used for monitoring the pressure of the energy accumulator group.

8. The control device of claim 4, further comprising a hydro-pneumatic switch;

the liquid-air switch is respectively connected with the air source and the air pump;

The liquid-gas switch is used for controlling the start and stop of the air pump.

9. The control device of claim 1, wherein the high pressure control zone further comprises a first pneumatic pressure transmitter;

the air inlet and the air outlet of the first pneumatic pressure transmitter are connected with the driller control console, and the liquid inlet of the first pneumatic pressure transmitter is respectively connected with the high-pressure two-position three-way rotary valve and the high-pressure reducing valve.

10. The control device of claim 2, wherein the atmospheric control zone further comprises a second pneumatic pressure transmitter, a third pneumatic pressure transmitter, and a fourth pneumatic pressure transmitter;

the air inlet and the air outlet of the second pneumatic pressure transmitter are connected with the driller control console; the liquid inlet of the second pneumatic pressure transmitter is connected with the high-pressure reducing valve;

the air inlet and the air outlet of the third pneumatic pressure transmitter are connected with the driller control console; the liquid inlet of the third pneumatic pressure transmitter is connected with the second three-position four-way valve;

the air inlet and the air outlet of the fourth pneumatic pressure transmitter are connected with the driller control console; and a liquid inlet of the fourth pneumatic pressure transmitter is connected with the first three-position four-way valve.

11. The control device according to claim 5, further comprising a pneumatic pressure regulating valve and a three-position four-way ventilation swivel valve;

the first air inlet of the three-position four-way ventilation rotary valve is connected with the driver console;

the second air inlet of the three-position four-way ventilation rotary valve is connected with the pneumatic pressure regulating valve;

the air outlet of the three-position four-way ventilation rotary valve is connected with the second pressure regulating valve;

the pneumatic pressure regulating valve is used for regulating and controlling the pressure of the compressed air to a sixth preset pressure value;

the driller control console is used for controlling the steering of the three-position four-way air-turning valve so that the compressed air flows to the second pressure regulating valve.

12. The control device of claim 1, further comprising an air filtration pressure relief valve;

the air inlet of the air filtering pressure reducing valve is connected with the driller control console;

the air outlet of the air filtering pressure reducing valve is respectively connected with 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;

the air filtering and reducing valve is used for filtering and reducing the pressure of the compressed air.

13. Use of a pilot-controlled hydraulic blowout preventer control unit as claimed in any one of claims 1 to 12 in hydraulic blowout preventer control.