Transocean Ltd. (NYSE:RIG) has lined up an 11-well contract for the ultra-deepwater semisubmersible GSF Development Driller I, the company said July 17.

Chevron Australia tapped the company for the job, which is set to begin in first-half 2019 offshore Australia. The contract includes four one-well options. The estimated firm contract backlog, excluding integrated services, is about $158 million, Transocean said in the release.

The news comes a day after Transocean said the midwater semisubmersible Transocean 712 was awarded a 13-well contract by ConocoPhillips for work in the U.K. North Sea. Work is scheduled to begin in March 2018. The contract has a one-well option. The estimated firm contract backlog is about $75 million, according to the release.