Performing simultaneous operations on multiple wellbore locations using a single mobile drilling rig

A system, comprising:

• a drilling rig comprising a substructure and a drill floor positioned above said substructure, said drilling rig being adapted to be positioned above a plurality of wellbore location such that each of said plurality of wellbore locations is simultaneously positioned below said substructure;
• a plurality of openings in said drill floor, each of said plurality of drill floor openings being adapted to be positioned vertically above and substantially aligned with one of said plurality of wellbore locations;
• equipment movement means for moving pressure control equipment between positions proximate each of said plurality of wellbore locations, said equipment movement means being adapted to move said pressure control equipment between said positions while said drilling rig is performing a first rig operation on a first one of said plurality of wellbore locations through a first one of said plurality of drill floor openings;
• and
• equipment positioning means for positioning pressure control equipment on one or more of said plurality of wellbore locations, said equipment positioning means being adapted to position said pressure control equipment on a second one of said plurality of wellbore locations while said first rig operation is being performed on said first wellbore location through said first drill floor opening.

A system, comprising:

• a mobile drilling rig that is adapted to be positioned above a plurality of wellbore locations, said mobile drilling rig comprising a drilling rig mast and a substructure that is configured so that each of said plurality of wellbore locations is simultaneously positioned within a cellar area of said substructure, wherein said mobile drilling rig is adapted to perform an on-line drilling operation on a first one of said plurality of wellbore locations and said drilling rig mast is adapted to be positioned above and substantially aligned with said first wellbore location during said on-line drilling operation;
• equipment movement means operatively coupled to said substructure and positioned in said cellar area thereof, said equipment movement means being adapted for moving pressure control equipment between positions proximate each of said plurality of wellbore locations while said mobile drilling rig is performing said on-line drilling operation on said first wellbore location;
• equipment positioning means operatively coupled to said substructure and positioned in said cellar area thereof, said equipment positioning means being adapted for lifting pressure control equipment from said equipment movement means and positioning said pressure control equipment on at least one wellbore location that is immediately adjacent to said first wellbore location while said drilling rig is performing said on-line drilling operation on said first wellbore location.

A method. comprising:

• positioning a substructure of a mobile drilling rig above at least first and second wellbore locations of wellbore drilling site such that each of said first and second wellbore locations are simultaneously positioned within a cellar area of said substructure;
• positioning a first blowout preventer on a first wellhead at said first wellbore location;
• positioning a second blowout preventer in said cellar area of said substructure;
• performing a first on-line drilling operation on said first wellbore location through said first blowout preventer;
• moving said second blowout preventer within said cellar area to a second wellhead at said second wellbore location while performing said first on-line drilling operation;
• and
• after moving said second blowout preventer, performing a second on-line drilling operation on said second wellbore location through said second blowout preventer.