Offshore drilling contractor Atwood Oceanics has extended its drilling operations for Kosmos Energy with a contract for the Atwood Achiever ultradeepwater rig.

Atwood said one of its subsidiaries agreed to a one-well contract with Kosmos for operations offshore Northwest Africa. The day rate for the drillship was not disclosed.

Plans are for the new contract to begin after the completion of a well in progress under the existing contract, Atwood said in the release.

The new contract includes six one-well priced options. If no options are exercised, the rig would become available again in March 2018, the company said. However, the next availability date extends to about December 2018 if all six options are exercised.