CP-5000 semi-submersible drilling rig can perform the operation of drilling, completion and intervention. It includes well drilling, injection, exploration and relief well drilling with features of deviation control, well deepening, branching,side tracking, re-spudding, perforation and well killing. And it can finish batch drilling, wellhead completion, intervention and maintenance of wellhead and baseplate. The rig is applicable to drill in waters up to 5,000ft deep and the maximum drilling capacity is 35,000ft deep.