Exploration & development companies include Diamond Offshore Drilling, Callon Petroleum Company, San Leon Energy, Andes Energia, Endeavour Silver and 520 other companies.
Callon Petroleum Company, an independent oil and natural gas company, acquires, explores for, develops, and produces oil and natural gas properties in the Permian Basin in West Texas.
Koil Energy Solutions (formerly known as Deep Down) is an oilfield products and services company providing solutions for the energy and offshore industries.
Shandong Molong Petroleum Machinery (山东墨龙石油机械有限公司) is a company engaged in the development, production, and distribution of products for the energy equipment industry.