Patent ID: 6481931
Filing Date: 2002-11-19
Classification: E21B

Abstract:
A combination derrick adaptation and a drilling floor plan for a cantilever supported drilling rig having a fore end adjacent a supporting hull, and an aft end, a port side and a starboard side, with a vee door at the fore end, arranged for a main hoist hook load axis extending through said floor, the combination comprising:a) set back areas for racked pipe on each transverse side of the vee door, on the fore end of said floor; b) draw works on the port side of said floor; c) dynamic brake at the fore end of the draw works; d) drillers station aft of the draw works, on the port side; e) spare line spool on the hull; and f) said derrick extending upward from the floor and arranged to suspend a drill string along the well centerline about one third of the floor length from the aft end.