Thanks to the subject matter experts who generously shared their knowledge and expertise with Drilling Matters:

Karen Olson, Director V+ Solutions, Southwestern Energy

George King, Distinguished Engineering Advisor, Apache Corp., and Principal, GEK Engineering

Susan Farrell, Vice President, IHS Markit

Jim Wicklund, Geophysicist, Petroleum Engineer and Managing Director, Energy Research Credit Suisse

Kathleen Hartnett White, Distinguished Fellow in Residence, Texas Public Policy Foundation, past chair and commissioner of the Texas Commission on Environmental Quality and co-author of "Fueling Freedom: Exposing the Mad War on Energy"

Dan Haley, President, Colorado Oil & Gas Association

Mike Garvin, Patterson-UTI Energy Inc.

David Reid, National Oilwell Varco

James Howard, Jr, Rowan Companies

Del Manning, Rowan Companies

John Willis, Occidental Oil & Gas Corporation

Chris Beckett, Pacific Drilling

Aaron Sinnott, Weatherford

Justus Kay, Schlumberger

Charlie Williams, Center for Offshore Safety