Multi-Deployable Subsea Stack System

A subsea drilling method comprising:

• deploying a first additional blowout preventer package to a subsea wellhead, wherein the first additional blowout preventer package comprises a ram blowout preventer;
• utilizing a drilling riser to deploy a lower marine riser package and a blowout preventer stack from a drilling rig;
• landing the blowout preventer stack on the first additional blowout preventer package;
• and
• performing drilling operations with the drilling rig while utilizing the ram blowout preventer in the first additional blowout preventer package.

A blowout preventer stack system comprising:

• a lower marine riser package comprising a riser connector;
• a blowout preventer stack releasably coupled to said lower marine riser package and comprising a first ram blowout preventer;
• and
• an additional blowout preventer package releasably coupled to said blowout preventer stack and comprising a second ram blowout preventer.