Abstract: Structures and methods are disclosed for underwater drilling. One embodiment includes a housing having a plurality of interconnected, pre-set drilling tubes, wherein there are multiple drill casings in each of the plurality of interconnected, pre-set drilling tubes. One or more underwater drilling structures may be stacked on each other in order to connectably establish an underwater drilling structure that satisfies the drilling requirements for recovery or otherwise collecting hydrocarbons. The housing may connect to an adjustable containment portion that is integrated or removable connected to an exploration, production, containment or storage structure, e.g., a drilling ship. The interior of the housing includes the plurality of interconnected, pre-set drilling tubes and multiple drill casings, and the housing, itself, may shield its interior from contact with water.