Forman Roustabout (Driver) and Roustabout (Passenger) were traveling back from camp to Rig site using Toyota Pickup. Approximately 2.5 km from Rig site, driver approached a S- curve and lost vehicle control which resulted the vehicle to skid out side the road and hit a sand ramp which was in road shoulder and resulted the vehicle to rollover half a turn and rested on its roof. Driver escaped the vehicle without injury and the Passenger escaped with bruise on his left hand.