METHOD OF AND DEVICE FOR RECORDING DATA DOWN-HOLE IN A WELL BORE

摘要

A down-hole temperature, pressure and time measuring and digital data storage tool, utilizing self-contained microprocessor-based data taking and data reduction, with power conservation realized by processor controlled powering of data transducers only during sample periods and control of the rate at which samples are taken as an inverse function of dynamically calculated data rate of change. Data storage is effected only for data samples representing a significant change in data magnitude as established by a processor program-defined significant-data criteria.