Established in 1977, the Geothermal Division has participated in drilling and scientific data collection pertaining to exploration wells in the Dieng Plateau, Kamojang, and other geothermal fields in Indonesia. The operation of subsurface instrumentation for geothermal well study began in 1978. All equipment is privately owned and operated by PT GEOSERVICES personnel. The engineers have been factory-trained by the Kuster Company (California) and the Geophysical Research Corporation (Oklahoma). In conjunction with associated divisions, the Geothermal Division provides a complete services package, including surface study, drilling, engineering, well study, and production testing.