Repsol YPF has begun drilling three offshore wells in the Gulf of Cadiz. Repsol YPF has begun ... in waters from 20 to 400 meters deep using Transocean Inc.'s semisub, Actinia.

The Discoverer Clear Leader will feature Transocean's patented dual-activity drilling technology ... contract assignment with Chevron in the U.S. Gulf of Mexico. Revenues of approximately $ ...