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US 12,669,029 B2Granted
Electrical accumulator system with internal transfer barrier
AssigneeSchlumberger Technology Corporation
InventorsVikas Rakhunde, Sean Clarke, Gerrit Kroesen
Life of this patent
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Abstract
A system includes a first accumulator system, a second accumulator system, an electronic module including a battery system, and a drilling component. The electronic module is electrically coupled to the first and second accumulator systems, and the drilling component is hydraulically coupled to the first and second accumulator systems.
Claims15
A system comprising:
- a first accumulator system;
- a second accumulator system, wherein at least one of the first accumulator system and the second accumulator system includes:
- a motor housing comprising an electric motor;
- a function chamber coupled to the motor housing;
- an anti-rotating chamber coupled to the motor housing;
- a balance chamber;
- a transfer chamber disposed between the anti-rotating chamber and the balance chamber;
- a shaft configured to move axially within the function chamber, the anti-rotating chamber, and the transfer chamber;
- a first piston coupled to a first end of the shaft;
- a second piston coupled to a second end of the shaft, wherein the electric motor is coupled to and drives the shaft to alternatingly compress working fluid with the first piston in the function chamber to drive the working fluid out of the function chamber, and compress transfer fluid with the second piston in the transfer chamber to drive the transfer fluid out of the transfer chamber;
- and
- a third piston configured to separate the transfer chamber from the balance chamber;
- an electronic module comprising a battery system, the electronic module being electrically coupled to the first accumulator system and the second accumulator system;
- and
- a drilling component hydraulically coupled to the first accumulator system and the second accumulator system.
12 more elements
A method comprising:
- obtaining a blowout preventer stack assembly comprising:
- a lower marine riser package connected to a blowout preventer package, the blowout preventer stack assembly connected in line between a wellhead assembly and a floating rig through a riser;
- detecting an emergency event;
- in response to the emergency event, sending a command to an electronic module comprising a battery system, the electronic module being electrically coupled to at least one accumulator system on the blowout preventer package, wherein the at least one accumulator system includes:
- a motor housing comprising an electric motor;
- a function chamber coupled to the motor housing;
- an anti-rotating chamber coupled to the motor housing;
- a balance chamber;
- a transfer chamber disposed between the anti-rotating chamber and the balance chamber;
- a shaft configured to move axially within the function chamber, the anti-rotating chamber, and the transfer chamber;
- a first piston coupled to a first end of the shaft;
- a second piston coupled to a second end of the shaft, wherein the electric motor is coupled to and drives the shaft to alternatingly compress working fluid with the first piston in the function chamber to drive the working fluid out of the function chamber, and compress transfer fluid with the second piston in the transfer chamber to drive the transfer fluid out of the transfer chamber;
- and
- a third piston configured to separate the transfer chamber from the balance chamber;
- activating a sequence to drive the at least one accumulator system;
- using the at least one accumulator system to hydraulically actuate a component of the blowout preventer package to a closed position;
- and
- pressurizing the transfer fluid to actuate the component of the blowout preventer package to an open position, wherein the at least one accumulator system and the component of the blowout preventer package create a closed loop.
15 more elements
Dependencies are inferred from the claim text.