REMOTE TEMPERATURE MEASURING DEVICE Russian patent published in 2002 - IPC

FIELD: oil and gas industry; geothermic researches. SUBSTANCE: invention can be used at carrying out geothermic researches included in obligatory complex of geophysical methods of control of operation of underground gas storage at detection of fluid cross flows behind casing string. Improved accuracy of temperature measurements and increased resolving power of remote thermometers are provided owing to use of temperature sensitive elements, pulse converter of temperature sensitive elements signals, armored communication cable, unbalance signals amplifier, voltage stabilizer, surface data processing unit including units of supply, discrimination, processing and recording of pulse signal. Temperature sensitive elements are placed in bridge measuring circuit in opposite arms of bridge, and two other arms of bridge circuit are formed by nonlinear elements - current stabilizing two-terminal networks. Supply diagonal of bridge circuit is connected to voltage stabilizer, and measuring diagonal, to outputs of unbalance signal amplifier, and outlet is connected to input of pulse converter. Output of pulse converter is coupled with surface data processing unit by means of armored cable. EFFECT: improved accuracy of temperature measurements. 1 dwg