Equipment for acquiring, processing and interpreting data in connection with open and cased wells, namely-- logging tools used to gather data that measures porosity, amplitude variation, rock properties and borehole stress data, anisotropy, through casing data, and fracture detection with respect to electrical, resistivity, induction, radioactivity, acoustic, seismic, caliper, temperature, nuclear magnetic resonance, and production logging, and combinations of the foregoing; formation testing and analysis apparatus; sidewall sample taking apparatus; fluid sampling, characterization and transfer apparatus; direction and deviation survey apparatus; depth determination apparatus such as for marker placing and locating, and casing collar locating apparatus for acquiring, processing, interpreting, storing, presenting and transmitting from one location to another of well site logging data under computer control computer hardware and software for the processing and interpretation of geoscientific data used in the oil and gas exploration and production business; apparatus and systems for sensing, measuring, testing, conditioning, indicating and recording electrical and physical quantities, namely-- sensors of displacement, pressure, temperature, acceleration, flow and speed; thermocouples, torque meters, and fluid level sensors