Abstract: An electronic flow instrument and method which uses the instrument for monitoring and/or controlling the production or flow of a fluid. The instrument has a multiplexer linked by a USB connection to a microcontroller so that the multiplexer provides multiple USB connection ports for the microcontroller. A resident USB flash drive is installed in one of the USB connection ports for storing long term logging data related to the production or flow of the fluid. Secure access to the electronic flow instrument is provided by using a second USB flash drive containing a security file or password as a security key.

Abstract: Method and apparatus for logging a borehole of the type in which an acoustic energy signal scans the borehole wall at a plurality of different depths thereby generating signals reflected from a reflecting boundary which are indicitative of the condition of the reflecting boundary. A downhole microcomputer generates a sync signal for firing a transducer thereby directing an acoustic pulse toward the borehole wall. The transducer is rotated by a stepper motor. The computer synchronizes the number of transducer pulses with the number of stepper motor pulses thereby generating a constant number of transducer pulses per motor revolution. Reflected acoustic energy generates an electrical pulse which is amplified and summed with a signal relating to the rotational orientation of the transducer and the occurrence of the transducer firing pulse. The summed signal provides information relating to the condition of the reflecting boundary and may be used to generate a video image thereof.