Douglas S. Wheeler

Global Tubing LLC designs, manufactures, and supplies coiled tubing products to the oil and gas industry. It offers spooling, welding, hydrotesting, installation, preventative maintenance, support, and reel storage and asset management services. The company was founded by Neal Lux, Doug Wheeler, and Garry McClelland in April 2007 and is headquartered in Dayton, TX.

Howard Energy Co., Inc. provides oil and gas exploration and production services. The company was founded on December 22, 1983 and is headquartered in Traverse City, MI.

ION Geophysical Corp. engages in the provision of geoscience technology, services, and solutions to the oil and gas industry. It operates through the E&P Technology and Services, and Operations Optimization segments. The E&P Technology and Services segment creates digital data assets and delivers services that improve decision-making, mitigate risk and maximize portfolio value for E&P companies. The Operations Optimization segment develops mission-critical subscription offerings and engineering services that enable operational control and optimization offshore. The company was founded in 1968 and is headquartered in Houston, TX.