Originally conceived as a bottom-supported drilling unit, semisubmersibles eventually found their true calling. Now, semisubs are the most stable of any floating rig, many times chosen for harsh ...

The premise of a jackup rig is that it is self-elevating; here, the legs are stationed on ocean floor and the drilling equipment is jacked up above the water's surface. Providing a very stable ...

Brazilian drilling contractor Constellation Oil Services has been awarded a new contract with Petrobras to carry out ...