DGI provides multi-lingual (English, French, Spanish) crews trained to operate under harsh conditions. DGI is experienced in underground, helicopter-supported, all terrain vehicle-access and barge-based work.


Televiewers provide oriented geotechnical and structural information in new or previously drilled holes. The best way to measure breakouts and stress field orientation in-situ.

Acoustic Televiewer

Provides a continuous, acoustic image of the borehole wall.

Joints, fractures, faults, breakouts and other acoustically visible features can be precisely oriented.

Can be acquired in down, horizontal and upward drilled holes.

Optical Televiewer

Acquires an oriented 360° high-resolution image of the borehole wall.

Optimal for the orientation and identification of veins, lithological changes, bedding and fractures.

Can be acquired in down, horizontal and upward drilled holes.

Video Inspection

Downhole and sideview cameras allow for detailed inspections.

Ideal for ground water monitoring, casing inspections of new wells and preventative maintenance on existing wells.

Colour image, 360 degree view.

Physical Properties

The quantitative link between geology and geophysics. Understand your geophysics, map alteration, estimate grade.

Natural Gamma

Measures the variation of natural radioactivity of the formation.

Important for distinguishing rock types, lithological mapping, stratigraphic correlation and detection of alteration zones.

Magnetic Susceptibility

Measures the amount of magnetic minerals contained within a volume of rock, such as magnetite and pyrrhotite.

Identifies changes in lithology, degree of homogeneity and may indicate a zone of alteration.

Acoustic Velocity

Records the full acoustic waveform (compressional, shear and Stoneley waves).

Aids in calculation of porosity, acoustic impedance, P and S wave velocity, detection of fractures and cement bond logging assessment.

Spontaneous Potential

Records the electrical potential difference, measured by an electrode in the probe relative to a fixed reference electrode at the surface.

Multiple applications in groundwater studies and determining clay and/or salt content.

Crosshole Surveys

Two (or more) boreholes are used to take measurements such as seismic, resistivity, IP, etc and image between boreholes.

Crosshole tomography allows for the rapid coverage of a larger volume of space.

Gamma-Gamma Density

Measures rock density as a function of porosity, fluid content and mineralogical composition.

Quantitative in-situ density is valuable for ore tonnage and reserve calculations, and constraining gravity surveys.

Inductive Conductivity

Measures the combined conductivity of rock, soil and pore fluid. Inductive method enables logging through PVC casing.

Useful for distinguishing lithology and identifying conductive mineralization.

Single Point Resistance

Measures resistance between an electrode on the probe and at the surface.

Useful for determination of lithologies. Advantageous over multi-electrode logs as they do not exhibit reversals as a result of bed thickness.

Induced Polarization

Measures the chargeability of the formation.

Useful for detecting disseminated massive sulphides, which will have a higher chargeability compared to their host rock.

Off hole Magnetic Vectoring

Detect, measure and vector in on off-hole magnetic anomalies, for better drill hole planning.

Neutron Porosity

Measures the amount of neutrons absorbed by the formation.

Calibrated neutron probes enable quantitative porosity measurement; relative neutron logs can be used to define changes in lithology.

Electric Resistivity

Measures the combined electrical resistivity of the rock, soil and pore fluid.

Identifies lithology and fracture zones and may provide contaminant identification based on conductivity of pore fluids.

Mechanical Caliper

Mechanical arms measure the borehole diameter.

Diameter variations are used to evaluate fracturing, lithology changes, competency of rock and volume calculations.

Borehole Radar

Detects lithological changes, and major structural features using radar waves.

Radar waves reflect preferentially off of conductive materials, showing contrasts in rock properties.

Can be used off-hole, cross hole and surface to borehole modes.


Gain an accurate three-dimensional path of the borehole, which is important for exploration, resource delineation and mining applications.

North Seeking Gyro

Provides the most accurate directional information (dip and azimuth) in both magnetic and non-magnetic environments.

Detects the starting position, removing the opportunity for user error. Allows for superior positional accuracy for precise 3D modeling of all borehole information.

Rate Gyro

Accurate and cost effective solution providing directional information (dip and azimuth) in both magnetic and non-magnetic environments.

The user inputs the starting position and the gyro measures change downhole. Robust equipment designed to work on drill rigs in the heat and cold.

3-Component Magnetometer

Integrated tilt-meters and 3-component magnetometers provide directional (dip and azimuth) information.

Can be used to vector off hole magnetic anomalies.


Measuring borehole fluid properties.

Flow Meter

Measures the in-situ velocity of fluid in a borehole. Can be measured under ambient and dynamic conditions.

Useful for geotechnical and hydrogeological purposes.

Fluid Resistivity & Temperature

Measures changes in fluid temperature, and/or resistivity related to fluid flow in the borehole.

Temperature gradient can identify water flow through cracks, fracture or shear zones which can aid structural interpretation.


Monitors water pressure inside a borehole.

Applications include determining slope stability, monitoring dewatering systems and determining safe rates of fill or excavation.

Packer Testing

Determines the hydraulic conductivity of rock mass.

Used to generate a hydraulic conductivity v depth curve, that is important for the development of accurate ground water models.

Magnetic Resonance Sounding

Detects proton containing liquids (hydrocarbons or water).

Can give the depth and thickness of aquifers, as well as provide estimates of their effective porosity and permeability.


Flexible liners that can be installed to stabilize and seal the borehole against cross contamination.

Allow for numerous hydrogeological measurements including flow, transmissivity profiling, locating NAPL sources, mapping dissolved contaminants and hydraulic head distributions.

Cement Bond Logs

Measure the cement bond quality between casing and the formation.

Fluid Sampler

Obtains fluid samples at designated depths in the borehole using a sample chamber, for analysis in a lab.

Can indicate water quality changes throughout the borehole; useful for environmental studies.

Unmanned Aerial Systems

Provide high resolution images over a large area at low costs for tailings pond monitoring, open pits and stockpiles.


Changing conditions at a project site can impact planning and risk management.

Maintain accurate and updated Digital Surface Models (DSMs) to monitor changes and minimize associated risks. UAS provides a cutting edge solution, permitting the maintenance of accurate and up-to-date DSMs efficiently.

Stockpile Volume

Safe, quick and accurate. Rapid calculation of stockpile volume can be accomplished accurately while reducing field-personnel exposure to hazardous working condition. The work can be completed in minutes or hours versus days.


Investigation of a property or infrastructure to assist in a broad range of projects and mining activities is now possible faster and safer than ever with UAS.

Flexibility in deploying multi-sensing platforms that encompasses aerial photography, 3D measurements, and sensing tools such as Lidar, Near Infrared Imaging, and Magnetic Gradiometer.


High resolution imaging systems and satellite guided precision yields accurate and rapid mapping.

Have a different application? We can help!

Contact Us!
Head Office

119 Spadina Avenue, Suite 405
Toronto, Ontario
Canada, M5V 2L1
p: +1.416.361.3191
f: + 1.416.361.3198

Mexico Office
Hermosillo, Sonora
p: +52 (55) 852-65452

Operations Centre

121 Welham Road, Unit 7
Barrie, Ontario
Canada, L4N 8Y3
p: + 1.705.730.7992
f: + 1.705.730.1862