Professional Directional Enterprises, Inc. (“ProD” or the “Company”)

ProD is a leading independent provider of horizontal / directional drilling services, fluid services and coring services to the onshore U.S. oil and gas industry. Since its founding in 2001, the Company has grown into one of the largest privately-held horizontal / directional drilling companies in the industry by developing a differentiated technology offering and consistently providing superior and reliable operational performance with best-in-class personnel. ProD is headquartered in Conroe, Texas and operates in all major shale basins in the U.S.

Diamond Castle Holdings (“Diamond Castle”)

Diamond Castle is a private equity investment firm founded in 2004 with approximately $2.0 billion of capital raised to date. Diamond Castle focuses on investments in the energy & power, financial services and healthcare sectors, as well as other diversified industries. Diamond Castle is based in New York City.

SCF Partners (“SCF”)

SCF, headquartered in Houston, Texas, with offices also in Aberdeen, Singapore and Calgary, is a private equity firm focused solely on building energy services, equipment and technology companies. SCF has completed more than 400 energy services investments and helped build 17 public companies in its nearly 30 year history. SCF partners with operational management and assists with additional growth through acquisitions and geographic expansion initiatives to build leading companies across the globe.

PPHB, LP (“PPHB”)

PPHB is an independent investment banking firm providing financial advisory services exclusively to clients in the oilfield equipment and service industry.