Machines for providing pressure control and structural support for the blow out preventer (BOP) and for creating an interface for drilling and casing suspension, and providing annular access for pressure monitoring and machine tools for providing pressure control interface to the wellhead and valve components to be run in the rig; Machines, namely, multi bowl wellhead, speed head, lock ring, and machine tools, namely, running tools; motors and engines except for land vehicles; machine coupling and transmission components except for land vehicles; oil drilling rigs and parts and fittings thereof; oil drilling tools, namely, back pressure valves as parts of machines, wear bushings for use as parts of machines; drilling rigs for drilling off-shore wells and parts and fittings thereof; metalworking machine tools for use in completion of subterranean wells; metal machine tools for use in drilling of subterranean wells; machines for drilling wells; apparatus for drilling wells, namely, surface wellhead system and parts thereof in the nature of casing head, casing spool, tubing head, casing hangers, tubing hangers, seal packoffs, valves; apparatus for use in well drilling operations, namely, surface wellhead systems and parts thereof in the nature of casing head, casing spool, tubing head, casing hangers, tubing hangers, seal packoffs, offline cementing, dummy hangers, lubricator; wellhead apparatus, namely, apparatus for use in well drilling operations in the nature of well drilling rig mechanical handling machines and devices; valves being parts of wellhead machine