Patent ID: 6848515

Claim:
A process to transport and assemble a drilling rig substructure, which process comprises: transporting a driller side substructure section having a floor and a base and transporting an off driller side substructure section having a floor and a base to a rig site so that said sections are spaced from and parallel to each other; transporting a center substructure section to said rig site; moving said center substructure section into a space between said driller side section and said off driller side section; connecting said center substructure section to said driller side and to said off driller side substructure section; and raising a floor of said driller side substructure section and raising a floor of said off driller side substructure section while both connected to said center substructure section from a transport position to a use position while maintaining said floors parallel to said bases.