Basic Knowledge Of Remote Consoles

The full English term for remote control console is "remote control console," a petroleum term published in 1994.
The remote control console consists of an oil tank, pump unit, accumulator unit, manifold, various valves, instruments, and electrical control box. The main function of the remote control console is to generate high-pressure control fluid using the pump unit and store it in the accumulator unit. When it is necessary to open or close the blowout preventer, the high-pressure control fluid from the accumulator is distributed to the various control objects (blowout preventer or control manifold) through a three-position four-way directional control valve in the manifold.

Features of the remote control console:
1. Equipped with two independent power sources.
2. The accumulator unit has sufficient high-pressure fluid reserves to open and close the blowout preventer. The accumulator system is divided into four groups. When one or a group of accumulators fails, the capacity loss is no more than 25% of the total capacity. Each pipeline is equipped with a pressure source isolation valve and a pressure relief valve. The pressure relief valve has a pressure relief line to discharge the pressure outside the bottle.
3. Both the electric oil pump and the pneumatic oil pump have automatic start and stop control devices.
4. The opening and closing actions of each blowout preventer are controlled by the corresponding three-position four-way directional control valve.

Driller's Control Console
The driller's control console is typically installed on the drilling platform, allowing the driller to easily remotely control the blowout preventer (BOP). An auxiliary driller's control console is usually installed in the control room for use in emergency situations.
Features of the Driller's Control Console:

1. Uses compressed air as the working medium, ensuring safe operation.
2. The valve cores of each pneumatic rotary valve are of the Y-type and automatically reset, ensuring that remote control of the BOP stack from the remote control console is not affected under any circumstances.
3. Features an operation memory function. Each three-position four-way pneumatic rotary valve is connected to a display cylinder. When the rotary valve is operated to the "open" or "closed" position, the display window simultaneously shows "open" or "closed." After the pneumatic rotary valve handle resets, the display remains unchanged, allowing the operator to understand the status of the previous operation.
4. To ensure reliable and accurate operation of the BOP stack, the rotary valves on the driller's control console use a two-stage operation method: first, the air source rotary valve must be turned to connect the air source, and then the control rotary valve must be turned to activate the corresponding control object.
The pneumatic control type driller's console can be upgraded to a driller's control system with alarms by combining it with an alarm-equipped remote control console. This system can provide audible and visual alarms for abnormal accumulator pressure, motor overload, and air source pressure.

Working Principle
Hydraulic System Control Principle
The pressurized oil stored in the accumulator group passes through the accumulator isolation valve (high-pressure ball valve) and filter, and is then reduced in pressure by a pressure reducing and overflow valve before entering the control manifold and then to the oil inlet of each three-position four-way directional control valve. Simultaneously, pressurized oil from the accumulator group passes through the filter and enters the pressure reducing and overflow valve of the annular blowout preventer, and is then supplied specifically to the annular blowout preventer after pressure reduction. By simply pushing the handle of the corresponding three-position four-way directional control valve, the "open" and "close" actions of the blowout preventer can be quickly achieved.
The switching of the three-position four-way directional control valve can also be completed remotely via the driller's control console. First, move the three-position four-way pneumatic directional control valve controlling the air source switch on the driller's control console to the open position, and simultaneously operate other three-position four-way pneumatic directional control valves for switching. Compressed air enters the remote control console through the air hose, controlling the corresponding cylinders, driving the switching handles, and causing the corresponding three-position four-way directional control valves on the remote control console to switch. Simultaneously with the switching of the pneumatic directional control valves on the driller's control console,
the compressed air moves the piston of the display cylinder, and the words "open" or "close" are displayed in the circular holes on each pneumatic directional control valve on the driller's control console, indicating whether each blowout preventer is in the "open" or "close" state.
Control of the Pneumatic Oil Pump
The pneumatically controlled hydraulic control system is equipped with a set of pneumatic oil pumps. When there is no electricity or electricity is not allowed, the system pressure can be provided by the pneumatic oil pump or a manual oil pump.
In a control system equipped with a pneumatic oil pump, open the air source switch valve and close the air bypass valve. Compressed air enters the hydraulic-pneumatic switch through the air source treatment components. If the manifold pressure is below 18.5 MPa (2500 psi), the hydraulic-pneumatic switch will automatically open, and compressed air will enter the pneumatic oil pump, driving it to operate. The discharged pressurized oil enters the manifold through a check valve. When the system pressure rises to approximately 21 MPa (3000 psi), the hydraulic-pneumatic switch automatically closes under the action of the pressurized oil, cutting off the air source, and the pneumatic oil pump stops working. In some cases, when overpressure operation requires hydraulic oil at a pressure higher than 21 MPa (3000 psi), the oil can only be supplied by a pneumatic oil pump. In this case, the accumulator isolation valve on the pipeline should be closed first to prevent the pressurized oil from entering the accumulator group. Simultaneously, the bypass valve of the pressure reducing and relief valve on the control manifold should be switched from the "closed" position to the "open" position. Open the bypass valve of the hydraulic-pneumatic switch to disable the switch, allowing compressed air to directly enter and operate the pneumatic oil pump.