John Clegg

John Clegg, SPE, is the chief technology officer for Hephae Energy Technology, a company founded to develop sensing, control, and communications solutions for drilling high-temperature wells. Over a 40-year career, he has worked in engineering and operations roles with upstream technologies including drill bits, drilling motors, rotary steerable tools, MWD, and logging while drilling. He holds an MSc degree in engineering science and a diploma in global business, both from Oxford University in England. As an active SPE member, Clegg has served on program committees and technical section boards, and helped found the SPE Geothermal Technical Section (GTTS). He has twice served as an SPE Distinguished Lecturer, on wellbore placement in 2020 to 2021 and on high-temperature drilling solutions in 2025 to 2026.