Mull Drilling Co., Inc. (MDC), originally founded in 1954 by J.A. Mull Jr. as Purcell-Mull Drilling Co., Inc., is a privately owned energy company headquartered in Wichita, Kansas.

MDCís exploration, operations and acquisitions efforts are focused in the Mid-Continent and Rocky Mountain region with particular emphasis in Kansas and Eastern Colorado. MDC maintains a balanced portfolio of wildcat, exploitation, and acquisition projects, targeting both oil and gas, to continue its growth and expansion. Integrating new technology with proven professional experience, the company currently operates over 250 wells, drills or participates in 35 wells per year, and actively pursues strategic acquisitions. The MDC organization handles all aspects of business operations including, accounting, engineering, geology, geophysics, land, field operations and environmental compliance.