Subsea well intervention systems and methods

A subsea work chamber comprising:

• a subsea work chamber configured to withstand subsea pressure and having an internal work space therein;
• one or more port configured for tool canister docking;
• a robotic assembly mechanism disposed in the internal work space;
• a first connector configured for coupling of the subsea work chamber with a wellhead;
• and
• a second connector configured for coupling of a wireline reeler unit to the subsea work chamber, wherein each port comprises a removable port cap configured to sealingly close the port, wherein each port is configured to sealingly receive the corresponding tool canister, wherein the tool canister comprises an open end that is sealed closed by a removable canister cap, and wherein inserting the capped canister open end into the port creates a sealed section of the port around the canister cap, and the subsea work chamber further comprises a pump configured to pump fluid in and out of the sealed section.

A subsea work chamber comprising:

• a subsea work chamber configured to withstand subsea pressure and having an internal work space therein;
• one or more port configured for tool canister docking;
• a robotic assembly mechanism disposed in the internal work space;
• a first connector configured for coupling of the subsea work chamber with a wellhead;
• and
• a second connector configured for coupling of a wireline reeler unit to the subsea work chamber;
• and
• an external wireline system configured to provide one or more tool canisters from the surface to the subsea work chamber.

A tool canister for delivery of well intervention tools to a subsea work chamber comprising:

• a canister configured to hold one or more tool and having an open end;
• and
• a removable canister cap configured to sealingly close the open end of the canister;
• wherein:
• the canister is configured to sealingly engage with a port of the subsea work chamber to create a sealed section around the canister cap,
• the canister holds approximately atmospheric pressure therein, and
• the canister is configured for use in a subsea environment,
• the capped open end of the canister is configured for insertion into the port, thereby nesting the canister cap within a port cap of the port of the subsea work chamber.

A subsea well intervention system for providing well intervention for a subsea wellhead comprising:

• a tool insertion system;
• and
• a subsea work chamber;
• wherein:
• the tool insertion system is operatively coupled to the subsea work chamber and to the wellhead,
• the subsea work chamber and the tool insertion system are disposed undersea,
• the tool insertion system comprises:
• a wireline reeler unit having a wireline;
• a lubricator valve;
• a lubricator section;
• and
• a wireline stuffing box;
• wherein:
• the wireline from the wireline reeler unit passes through the wireline stuffing box, with the wireline reeler unit configured to control the amount of wireline extending beyond the wireline stuffing box;
• the tool insertion system comprises a retracted position and an extended position;
• the retracted position provides fluid communication between the subsea work chamber and the lubricator valve;
• and
• the extended position isolates the subsea work chamber from the lubricator valve.