The Boretrak2 borehole deviation measurement system is a simple-to-use, gyro-based system for measuring the deviation of boreholes drilled in underground mines or on the surface in quarries or open-pit mines.
As a successor to the widely used Cabled and Rodded Boretrak systems, the fundamental capabilities of the Boretrak2 are backed by over 35 years of in-the-field history. The features of both units have been combined into a single all-purpose unit capable of measuring boreholes in any inclination: down, up or horizontal.
Together with Carlson Boretrak software, the Boretrak2 provides a simple-to-use system for checking the accuracy of drilled holes and their deviation from design.
The Boretrak2 utilizes a miniature inertial measurement unit (IMU) which contains a triaxial accelerometer, magnetometer, and gyro. Prior to deployment, the probe is calibrated against a known orientation on a supplied jig. This establishes a starting reference azimuth for the gyro. The gyro provides the Boretrak2 with an accurate, live heading which is tracked as the probe is deployed along the borehole.
The incorporation of a gyro means that the Boretrak2 is not reliant on a magnetic compass or on physical rod alignment to establish the changing direction and orientation of the borehole.
The gyro frees up the Boretrak2 to be deployed using a variety of methods. Downhole, the probe can be lowered on a simple wireline. Horizontal and uphole the Boretrak2 can be supplied with a semi-rigid pushrod system, spooled out from a cable reel. Alternatively, traditional Boretrak rods can be used and an adaptor allows customized deployment devices to be fabricated for applications unique to your site.
An Android mobile device or Windows-based tablet are used to run the Carlson Boretrak software which controls the Boretrak2 operation.
The Carlson Boretrak software can be used to set up the project, import hole coordinates, setup design holes, and import third-party data to form a background to the collected Boretrak2 data. A Bluetooth connection between the probe and mobile device allows setup and calibration prior to the deployment and also synchs the clocks on the probe and the mobile device.