PROCESS OF EXAMINATION OF INJECTION HOLES ( VERSIONS ) Russian patent published in 2000 - IPC

FIELD: thermal methods of examination of injection holes, location of point of loss of tightness of pump and compressor pipes of operational string in intervals cut off by these pipes and if motion of fluid is detected behind casing string. SUBSTANCE: effect of pump and compressor pipes or pump and compressor pipes and interpipe space or pump and compressor pipes, interpipe space and rock simultaneously can be recorded separately against background of monotonous distribution of temperature along shaft if proper technology to conduct examination in pump and compressor pipe is used. Results of these time measurement of temperature determines whether tightness of pump and compressor pipes or operational string has failed or not, whether motion of fluid behind operational string exists or not. Three measurements are taken in injection hole at rest and one measurement under injection of fluid into it. EFFECT: enhanced technological effectiveness, reduced cost of work for location of loss of tightness in pump and compressor pipes and string thanks to cancellation of sampling of fluid from injection hole. 2 cl, 1 dwg