Magnetic Borehole Deviation Surveying System

Boretrak® Cabled shown with CDU

MDL's Cabled Boretrak® is a cost effective borehole deviation surveying system, which has been designed to be compact, lightweight and above all, highly portable.

MDL has designed the cabled Boretrak® as a means of auditing the results of drilling activity, quickly and accurately. Incorrect setting of drill angles, borehole wander and drilling to incorrect depths, results in serious service problems particularly in the mining, quarrying and construction industries.

Boretrak® being placed down borehole

Red beads show 2m, black beads show 1m depths

The system features a rugged probe containing a tilt sensor and digital compass which calculates the borehole deviation from the collar position at fixed intervals. Data is output from the sensors (via the cable used to lower the Boretrak® down the borehole) and recorded on an MDL custom built data logger in real time at the surface.

MDL's Boretrak® 3D software allows the user to process data and produce printed and/or plotted results typically within 30 minutes of observation. Data can also be easily integrated into a wide range of software packages including MDL's comprehensive rock profiling package, Face 3D.

Close up of CDU showing real time display of data from the probe

Applications

Cast Blasting
Exploration Drilling
Foundations
Engineering Works
Quarry Blasting
Underground Mining
Pre-Split Blasting

The MDL cabled Boretrak® is the quickest and simplest equipment for measuring borehole deviation.

Incorrect drilling angles can lead to poor blast results and subsequent loss of productivity and increased costs.

The system comprises a weighted probe containing a pitch/roll sensor and a digital compass. This is lowered down the hole using the Kevlar beaded power-data cable.

Readings are taken at user- defined intervals and the results are displayed and recorded at the surface in the MDL logger.

Data is transferred to a PC and then further processes through the MDL Face 3D Modeller software where it can merged with the face scan for a comprehensive and accurate burden analysis of the complete blast.