DeviDrill - Steerable Wireline Core Barrel
The DeviDrill is an innovative directional core barrel based on the wireline core drilling technology used in exploration drilling. It drills the hole in a curve while at the same time collecting a 3m/10ft core sample, leading to the application name, Directional Core Drilling (DCD).
The DeviDrill fits directly to the standard drill string and is fully compatible with the N-size wireline system. There is no need for additional water pumps, drill strings, or survey instruments. Devico’s survey tools are a fully integrated part of the tool, as they stay on board and measure while drilling (MWD).
Coring while steering provides a complete record of the geology. It leaves nothing in the hole – except a curve. The curvature or dogleg can be adjusted from zero to more than 20 deg/30 meters but is typically aimed at 9 deg/30 meters, which is the recommended curvature from most drill rod manufacturers.
- Core in directional sections
- Low water consumption
- All necessary equipment in small start package
- Fits directly on N-size drill string
- High penetration rate in hard rocks
- Easily adjustable dogleg
- Higher dogleg used due to smoother curve
- Drill string rotation also during steering
- Directional surveys performed at hole bottom (through DeviDrill bit)
- Full size N-size borehole and no additional reaming required
- Mineral exploration
- Branch hole drilling programs (delineation, definition, resource drilling)
- Deviation control
- Geotechnical investigation