Scientific Drilling International

Independent directional drilling and wellbore navigation service provider founded in 1969 in Houston, Texas. Operates in more than 26 countries with nearly 40 locations worldwide. Specializes in comprehensive wellbore navigation solutions including Measurement While Drilling (MWD), Logging While Drilling (LWD), rotary steerable systems, drilling motors, gyroscopic and magnetic surveying, magnetic ranging, and cased hole services. Founded by James Murray as Scientific Drilling Controls (SDC), acquired in 1986 by Don van Steenwyk to form Scientific Drilling International. Employs approximately 1,200-5,500 staff globally with annual revenue of $300-750 million. Only company to design and manufacture complete wellbore construction solutions in-house down to the sensor level. Major innovations include the first downhole electronic steering tool ('the Eye'), Surface Readout Gyro (1977), continuous north-seeking gyro ('Keeper', 1995), and gyro MWD (2000). Serves conventional and unconventional oil and gas, geothermal energy, coalbed methane, and mining sectors. Headquarters in The Woodlands, Texas with major technology centers in Houston, Celle Germany, and Aberdeen UK.