The MITCO magnetic single shot instruments are used to determine the course of a wellbore during the drilling operation. The instrument measures and records the inclination and magnetic direction of the wellbore at a single measured depth and provides a permanent survey record on a film disk.
The complete instrument assembly consists of a camera, angle unit, timing device, and battery section - mounted in a protective barrel. For accurate measurements one or more non-magnetic drill collars must be placed in the bottom hole drilling assembly with the single shot instrument correctly located in these collars.
The MITCO instruments are available in two sizes: The 1 1/4" diameter mounted in a 1 3/4" O.D. protective barrel and running gear, and the 1 1/16" diameter mounted in a 1 3/8" O.D. protective barrel and running gear. This smaller instrument is particularly suited for use with the MITCO thermoshield in high temperature wells.