The first deepwater drilling rig developed in China is scheduled to drill a well in a part of the sea known as 43/11 block in 2012 at a water depth of 2,454 meters, making it the deepest well in the South China Sea. The block is now under exploration conducted by China National Offshore Oil Corporation （CNOOC）, BP Plc and Anadarko Petroleum Corp. It is on a short list of sites where CNOOC, the owner of the rig, is considering using semi-submersible deepwater rig this year to drill wells.