WT Petrotech USA, Inc. Specialist in Custom built Well Head Controls Visit our website to learn more about our services. WT Petrotech USA, Inc is a world leader in Engineering, Design and Manufacturing of Wellhead Control Panels, Production Safety Control Systems, Chemical Injection Systems, Subsea Hydraulic Power and Control Units (HPU), Coil Tube Pressure Safety Pilots, and OEM Part Sourcing. With over 30 years of experience in the oilfield with the capabilities in engineering, design and manufacturing production/safety control systems and hydraulic power control units for both offshore and onshore locations worldwide. Our control systems meet or exceed all international standards and codes.