The Compass is a magnetic multishot instrument for borehole surveying based on modern MEMS technology. It is fully integrated in its own brass running gear, requiring little set-up in the field. Wireless in operation, the tool utilizes Bluetooth communication with a rugged Android field device. The system can be run in both single and multishot modes.
The tool outputs standard survey data, such as recorded station depth, inclination, azimuth, gravity highside, magnetic toolface, temperature and more. The magnetometers have been calibrated with high precision and the tool will deliver a reading of the magnitude of the local magnetic field which can be used to detect anomalies in the local Earth magnetic field to identify survey stations of low quality. Local magnetic declination and start coordinates can also be set directly in the handheld unit.
The fully integrated running gear has a diameter of 35 mm and the system is supplied with three aluminum extension rods to allow the operator to get the gear through and away from the drill bit. A spearhead landing collar with multiple collar sizes makes operating the Compass simple and efficient.