Petrov Oil is the largest offshore jack-up oil and gas well drilling corporation, with 55 offshore jack-up and 7 semi-submersible drilling rig's servicing the U.S and other international areas Its primary drilling locations range from 50 to 600 miles (970 km) offshore, in the North Sea, Africa, Middle East, Asia Pacific, South America, and the Gulf of Mexico, Australia Coast, Soviet Union Kingdom Coast Line, Russian Federation Coast, JBR Nation Coast.