Blowout preventer locking system and method

A system, comprising:

• a lock system for a blowout preventer (BOP), comprising:
• a lock assembly comprising first and second locks, wherein the first lock is configured to selectively lock a first ram of a ram assembly extended into a cavity of the BOP, and the second lock is configured to selectively lock a second ram of the ram assembly extended into the cavity of the BOP;
• and
• a motor assembly comprising first and second motors, wherein the first motor is configured to cause the first lock to constrain the first ram, and the second motor is configured to cause the second lock to constrain the second ram;
• wherein the first and second motors are fluidly coupled to each other in a series arrangement via a connector conduit, the connector conduit being configured to flow a motor fluid sequentially through the first and second motors.

A method, comprising:

• monitoring conditions in a well to obtain feedback for controlling a blowout preventer (BOP);
• determining a current state of the BOP;
• and
• in response to determining the BOP to be in an open state and an unlocked state, and in response to the feedback meeting a condition for closing the BOP:
• controlling a ram fluid supply to move first and second rams of the BOP from an open position to a closed position;
• controlling a motor fluid supply to cause a motor fluid to flow through a motor fluid circuit sequentially through a first motor followed by a second motor, wherein the first and second motors are arranged in a series arrangement;
• and
• driving first and second locks via the first and second motors to move the first and second locks from an unlocked position to a locked position relative to the first and second rams.