Head assembly core orientation tool

DeviHead G2

The DeviHead G2 is a second-generation innovative core orientation system incorporating a miniature survey instrument, making it small enough to fit inside a core barrel head assembly. Utilizing top quality electronic accelerometers for high accuracy survey data, DeviHead G2 measures inclination, orientation, gravity vector, temperature (and battery status), providing quality control on the results.

DeviHead G2
454 mm / 17.9 in
55.9 mm
2.2 in
5.6 kg
12.3 lbs
Measurements for NWL size
Inclination accuracy:
Orientation accuracy:
±0.5° per station
Toolface accuracy:
Inclination range:
-90 to +90°
Running gear
454 to 503mm/17.9 to 19.8”
Temperature range
-15° to +70°C/14° to 140°F
Compatible sizes
Inclination accuracy
Inclination range
-90 to +90°
Orientation accuracy
±0.5° per station
Orientation range
0° − ±88° dip
Effected by magnetics
Data communication
Battery type
1X CR123a Lithium
Battery capacity, continuous use
Approx. 45 days

Handheld device

Android Smartphone
DeviHead App
Battery capacity, continuous use
15 hours
Battery type
IP rating

The DeviHead G2 is our second generation, more robust DeviHead system: a revolutionary core orientation solution that can be fully integrated with your drilling equipment. Unlike other core orientation systems, core barrel adjustments are not necessary, and core orientation may be started or ended at any time without having to retrieve the drill string and core barrel from the drill hole.

The DeviHead G2 replaces the inner tube cap and spindle of the core barrel head assembly already on site. It is designed to fit head assemblies from most of the major drilling tool manufacturers, without affecting length, operation, or quality.

Utilizing our innovative Brilliant Blue Technology (BBT) the DeviHead G2 is quickly activated and communicates wirelessly with the handheld device, without the need for opening any threads. Ensuring quick set up, data transfer and download.

The operation follows a clear step-by-step procedure, and one probe can be started or downloaded while the other is down in the hole, fitting in with the drilling cycle to optimize drilling productivity.

Each kit includes two DeviHead G2 units with interchangeable survey tools and spindle assemblies, ready to be used with the standard head assembly on site.


  • Digital results with archived data, no manual results transcription
  • Interchangeable electronics for multiple running gear sizes
  • Provides high orientation accuracy from 0° to +/-88° + dip
  • Innovative vale system, no impact on pump-in time
  • Brilliant Blue Technology (BBT) quick activation
  • Scandinavian made - Highly robust and reliable
  • User-friendly, intuitive operating software
  • Core barrel extensions not required
  • At-Rig QA/QC processing software
  • Records inclination data
  • High precision system

Application areas

  • Diamond Core Drilling
  • Downhole orientation
  • Geotechnical investigation
  • Exploration
product brochure

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Frequently asked questions about DeviHead G2

Are the internal survey tools of the DeviHead G2 interchangeable between running gear sizes?

Yes, with DeviHead G2 the internal survey tools are interchangeable.

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Do we need core barrel extensions to run the DeviHead G2 core orientation system?

No, the DeviHead G2 is designed to fit inside a core barrel head assembly, so no extensions are required.

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When was the original DeviHead innovation released to the market?

The original DeviHead (N-size) was released to the market in 2017.

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What rod sizes is the DeviHead G2 compatible with?

NWL and HWL.

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Is an handheld device included in the DeviHead G2 kit?

Yes, an Android Handheld device is included with every Devico borehole survey solution.

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