EVOLUTION OF DEVICO

TECHNOLOGY

CDDA 2015

Ben L’Heureux

Devico AS• Devico AS located in Trondheim, Norway

– DEVIation COntrol = Devico– Devico established in 1988 by Viktor Tokle

(spin-off from SINTEF University of Trondheim)

• Vision– Devico shall be world leading within

directional core drilling, borehole surveying and belonging software

• Today– Is the Only company in the world to offer

directional core drilling technology– Significant provider of advanced borehole

surveying instruments to world market– Extensive network of agents and license users– Projects carried out for 27 years in more than

50 countries all over the world

Devico Distribution Network

Devico Products• Borehole surveying instruments

– Magnetic: DeviShot

– Non-magnetic: DeviFlex

– Core orientation: DeviCore BBT

– Alignment Systems

– Sales and rental

• Directional Core Drilling (DCD)

– Steers during wireline core drilling

– Collects core while steering

– Offered as a service – Personnel and equipment from Devico

DeviShot• Magnetic multishot: survey in front of the bit

• Wireless communication

• Integrated running gear

• LED-light indication

DeviFlex

Non-magnetic multishot for surveying inside drill string

Three centralizers

Strain gauges &

accelerometers

DeviCore BBT• Core Orientation• Kit includes 2 probes• Wireless: BlueTooth• Rugged, Fast• Simple to use• Sales and Rental

DeviSight SurfaceAlignment system for drillhole and setting up drills

• Azimuth Alignment System True North• Surface Azimuth: 0.5 deg • Tilt and Roll accuracy: +/- 0.1 degrees• Azimuth Sampling: 10 per sec.• Position Accuracy: 30 cm• Satellite Constellations: GPS and Glonass (GNSS)

DEVICO DIRECTIONAL CORE BARREL

Technology & Methodology

Devico historical highlights

Devico historical highlights

Specifications

DeviDrill™ Wireline

• Total weight: 87 kg• Length: 5400 mm• Core length: 3 m• Core diameter:

31.5 mm• Hole diameter:

75.6 mm

Design & Concept• Attaches to standard NQ wireline drill string• Operates under same parameters as standard NQ• Recovers 3 meters of 31.5mm core

• The DeviDrill is a mechanically and hydraulically operated tool

• Stationary outer barrel:• Slides in a set tool face while drilling

• Rotating inner core barrel (driveshaft):• Transfers rotation from drill string to bit

• Non-rotating innertube• Collects 3 meter core

How does the DeviDrill™ work?

Operation parameters• Penetration rates– 7-12 cm/min

• Dogleg– 3 to 12°/30 m depending on drill rods and customer requirements

• Mud– Pure water preferred– Polymers and bentonites– Viscosity up to 40 is common

Advantages• Coring in the curved section of the borehole• Same drilling parameters as NWL• Fits directly on NWL drill string• All equipment included in start package• High penetration rate (7-12 cm/min)• No equipment left in hole• Creates smooth and stable curvature• Easily adjustable dogleg• Keeps borehole diameter• Enables surveying ahead of drill bit

DCD (Devidrill) vs Mud motorsPenetration Rate

in Hard Rock

0 2 4 6 8 10 12 14 16

DEVICO/ With DeviDrill (10 - 14 cm/per min)

Mud Motors (2 - 4 cm/per min)

cm/per min

Water Flow

0 50 100 150 200 250 300 350 400 450Mud Motors DeviDrill

Weight on Bit 25KN 45KN

Dogleg settings Fixed Ajustable

Drill string size BWL size NWL size

Diamond bit Navy Bit full face Diamond coring bit

Orientation control At surface At hole bottom

Mud Motors (200 - 400 L /per min)

DEVICO/ With DeviDrill (40 L /per min)

Applications of DCD• Deviation control• Branch holes• Flexibility – Target intersect angle– Drill rig positioning

• Geotechnical

1- Control natural deviation• When?

– Geology gives strong/unpredictable natural deviation– Deep targets

• Why?– Hit high priority targets accurately– Hit targets in predefined grid– Drill along straight line, e.g. for shafts

• How?– Start with normal wireline core drilling– Directional survey– Short sections of directional coring to control deviation

«We would not be able to target accurately without it [Devico]» Bob Carmichael, Lundin Mining Portugal

2- Branch holes• When

– Infill Drilling

– Deep targets (+500 m)

– Sensitive environment

• Why– Improve exploration

accuracy

– Reduce amount of drill sites

«We drilled 45 holes (26,250 m) using Devico technology. In conventional drilling approach we would have drilled 47,000 m, so Devico saved 20,750 m» Jukka Välimaa, Agnico-Eagle

• How– Borehole planning

– Drill mother hole and direct to first target

– Sidetrack mother hole and steer to second target

– Sidetrack mother or branch hole again

2-Branch holes - Sidetracking• Cut the curve

• Dogleg above 8°/30m

• ROP 1-2 cm/min

• 2-3 hours to complete

• Cement plugs

• Wedges

3-Flexibility in Exploration• When?

– Difficult to get good angle between borehole and target, e.g. steeply dipping orebodies

– Rig cannot be positioned optimally due to difficult terrain, limited underground access, pits, environment etc.

• Why?– Hit target with best possible angle

– Intersect otherwise inaccessible parts of the ore-body

«Devico forced it down in inclination, through the ore horizon … and the hole switched from failure to success» Glenn Patriksson, Lundin Mining Sweden

4- Geotechnical• When?

– Mapping formation for tunnels and geotechnical projects– Drilling inside ore formation

• Why?– Core sample from the full predetermined trajectory– Intersect formations in most relevant direction

Business Delivery Models• DCD is offered as a service,

personnel and equipment from Devico co-operating with the drilling contractor on site.

• Devico offers various business delivery models, ranging from short to long-term, to meet the requirements of each client and project.

Projects• Aurora, Guyana

• Rakita Exploration d.o.o., Serbia

• Agnico-Eagle, Finland

• Continental Gold, Colombia

• Geotechnical-Tunnelling

• Projects done in Canada

Aurora, Guyana• Problem– High natural deviation up and left

due to foliation

– Narrow ore body formation

• Solution mother holes with branches– Hole 1: 9 directional holes

– Hole 2: 10 directional holes

• Time saving for the clientProject done with CDDA member Orbit Garant

Rakita Exploration d.o.o., Serbia• Target depth:

2200 m• Depth of DCD: 1482-1546 m• Length of DCD: 64 m• Change of az: 40°• Change of inc: 4°• Avg. dogleg: 4.1° per 30m• Production rate:

Up to 11 m/shift

Agnico-Eagle, Finland • Savings using DeviDrill compared

to traditional surface drilling:– 41% in meters – 500m less drilling per branch – 29% in time – Drilling speed in branches

only 24% slower than standard drilling

– Cost savings per hole variable• Best 77%, • Average 25%

Continental Gold, Colombia• Three main reasons for

using directional core drilling– Limited area to set up drill

rigs (topography and tunnels)– Environmentally sensitive

area• Roads and rig platforms are

problematic– Location of ore formation

makes branch holes beneficial

Continental Gold, Colombia

Project done with CDDA member Major drilling Group

Jurong Island,SingaporeGeotechnical project: Pioneer Tunnel for cable • Very narrow path of 10 meter tolerance to fallow with a near 90 degree change in direction

before reaching the shore line.

• With inclination of -25 degree, then horizontal

• 3.5 months duration - combination of DCD 35% and standard drilling 65%

• Project done with Diamond Drilling Contractor: Tritech from Asia

Plan View

Side View

Molde, NorwayRoad Authority of NorwayGeotechnical tunnelling Project of E39 Highway

Molde, Norway• Four directional drill holes – Environmentally sensitive area– Average of 300 meters DCD in most holes

Some projects done in CanadaSeabridge Gold – British Columbia KSM

Project –2013 – 2014

• Mountainous terrain and the shortened drilling season.

• Using a branching method versus drilling new holes saved valuable time and reduced number of meters drilled.

• The DeviDrill™ improved the separation possible from the parent holes.

Some projects done in CanadaStornoway – Quebec 2014• We supported the

delineation drilling campaign at Stornoway’s Renard project in Quebec.

• Our crew worked with three drilling platforms at the peak of the program.

Project done with CDDA member Rouiller Drilling, Amos-Val d’Or

Summary• Directional Core Drilling can provide benefits

in many drilling programs by:– Controlling natural deviation– Reducing meters necessary to map an ore body– Intersecting targets with optimal angle– Intersecting normally inaccessible targets– Collecting core sample while steering

Working with Devico is an opportunity to combine your drilling services for any specialized projects.

Thank you for your attention

www.devico.comwww.talikindustrial.com