TELEMETERING SYSTEM TO CHECK DEPTH PARAMETERS DURING OPERATION OF HOLES Russian patent published in 2001 - IPC

FIELD: transmission of recorded parameters to surface. SUBSTANCE: telemetering system includes case, power supply unit, measuring and transmitting modules and electric separator in the form of individual conductor placed with retaining ring in lower part at point of planned investigation of depth parameters of hole between casings of operational string. Power supply unit, measuring and transmitting modules are located in case of telemetering system which diameter is smaller than inner diameter of operational string determined by specified relationship. Overshot to deliver and remove case of telemetering system is mounted in upper part of case, springy centering mounts to center borehole tool and to secure contact for electric communication of borehole dipole of telemetering system with walls of operational string are positioned at top and bottom. At least two electric separators are installed in operational string. Investigation process starts from upper separator where bushing securing electric communication with upper part of operational string is left after movement of case of telemetering system to lower separator. EFFECT: possibility of investigation of several objects in sequence. 1 cl, 4 dwg