| 主权项 |
1. A method for bringing a modular transfigurable drilling rig system into an operational mode, wherein the modular transfigurable drilling rig system is composed of multiple components, which system is transfigurable between a transport mode in which the components of the system are transported and an operational mode in which the components have been assembled to a drilling rig which is adapted to drill into a well center in the ground, the system comprising:
a base structure adapted to be positioned in the operational mode on the ground adjacent the well center, the base structure comprising an assembly of interconnected parts, including a pair of base members and a drilling mast foot connection assembly defining a drilling mast foot pivot axis; a drilling rig mast having a top end and a foot end, composed of multiple transportable mast sections, said mast sections at least including a lower section comprising the foot end of the mast, the lower section being connectable to the base structure, and a top section comprising the top end of the mast, which drilling rig mast is movable between a substantially horizontal mast assembly position, wherein the mast is assembled by interconnection of said multiple mast sections and an operational position vertically above the well center; and at least one drive assembly to move the drilling rig mast between the substantially horizontal mast assembly position and the vertical operational position, wherein the method comprises the steps of: positioning the base structure on the ground adjacent the well centre in a C-arrangement when seen from above, such that portions of said base members extend side-by-side with a spacing there between dimensioned to receive a lower portion of the lower mast section in its substantially horizontal position; positioning the lower mast section on a transport vehicle and moving it between the spaced base members so that the foot end of the lower mast section is brought adjacent the base structure; pivotally connecting the foot end of the lower mast section to the drilling mast foot connection assembly of the base structure; operating the at least one drive assembly to raise the lower mast section from the transport vehicle; removing the transport vehicle; positioning a subsequent drilling rig mast section which has been transported on a vehicle in a substantially horizontal position adjacent the lower mast section; aligning the upper end of the lower mast section with a lower end of the subsequent drilling rig mast section by tilting the lower mast section downward; connecting one end of the subsequent drilling mast section to the lower mast section; and operating the at least one drive assembly such that the drilling rig mast moves towards its vertical operational position. |
