Advanced Geothermal Optical Transducer (AGOT)

60170 Today¿s geothermal pressure/temperature measuring tools are short endurance, high value instruments used sparingly because their loss is a major expense. This project will build and test a rugged, affordable downhole sensor capable of returning an uninterrupted data stream at pressures and temperatures of 10,000 psi and 250¿C, respectively, thus permitting continuous deep-well logging. In Phase I, several prototype devices were constructed for laboratory testing. Optical fiber assemblies were integrated into the device in conjunction with a remote light source/photodetector/power supply module. Laboratory evaluation of a prototype sensor established and reaffirmed the basic design and performance for measurement of pressure in a hostile environment. Phase II provides for the further miniaturization and ruggedization of the device by the use of high temperature ceramic components. In addition to providing field deployable devices, a coupled sensor array will be utilized to provide other relevant data at the well-head, including drilling force, flow, pressure and temperature. Commercial Applications and Other Benefits as described by the awardee: The sensor technology should have application for monitoring jet engine core pressure, petrochemical processes, hydraulics, heavy construction equipment, high pressure metal cutting, oceanography, nuclear power plants, injection molding, processing industries, and machine tools, as well as for mining and research organizations requiring similar gains in performance an reduced cost.