Houston-headquartered Pacific Drilling has extended a rig construction deal with Samsung Heavy Industries for a new deepwater drillship.

Pacific said it has reached agreement with Samsung to extend its option to construction for a seventh drillship until October this year.

Three drillships have already been delivered to Pacific, another unit is due for delivery to theh drilling company in August this year and Pacific has two more on order with Samsung which are due for delivery in 2013.

The drillships are being built Samsung’s Goeje shipyard in South Korea, usiong drilling equipment supplied by National Oilwall Varco.