U.S. Coast Guard petty officer Manda Emery said Wednesday that crews for London-based Ensco will inspect the semi-submersible rig, which is about 130 miles from Galveston.
The rig was knocked 55 feet and took on water when it was struck by the wave Tuesday.
Emery says the rig was not drilling for oil or gas at the time. It's working a well owned by Houston-based Anadarko Petroleum Corp.
She says the rig's platform is stable and none of the 116 crew members was injured. No oil spilled in waters that are about 3,000 feet deep.