M/D Totco, as part of the National Oilwell Varco family of companies, stands out as the industry’s premier supplier of control, instrumentation, and well data systems for drilling activities worldwide.
Acknowledging the legacies of Martin-Decker and the Technical Oil Tool Corporation (TOTCO), M/D Totco now celebrates 9 decades of innovation.

Revolutionary devices such as the original Martin Decker weight indicator and Totco drift indicator (CVD) were just a beginning. While traditional weight indicators and CVDs remain prominent features of the product offering, M/D Totco looks to the future. They are committed to expanding the capabilities of electronic data acquisition, display, and control systems and retaining the leadership position in integrated systems that provide real-time drilling information and control.