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Home Angle Drilling Terrier

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Lightweight, compact and easy to manoeuvre through tight spaces, the Dando Terrier rotary rig is capable of a wide range of drilling techniques including continuous flight & hollow stem augering, tricone & drag bits and rotary core drilling as well as DTH hammers.

The rig is also available fitted with mast dump for angle drilling up to 45 degrees from vertical. Supplied with Dando’s new track mounted compressor unit, providing 400cfm at 170psi, the first machine sold is being used for gold exploration in the deep jungles of the Congo using Rotary Air Blast drilling. The Terrier’s ultra-small footprint and easy manoeuvrability means the rig is particularly suited to work in jungle and forest environments, causing very little disturbance to its surroundings.

See also:

Standard Dando Terrier

Specification

HYDRAULIC ROTARY DRILLING MAST AND HEAD

Driven by a hydraulic motor fitted with a 7 : 1 ratio gearbox with manual gear change, providing full controlled power and rotational speeds in forward or reverse. Integral side inlet water swivel with BW Rod connection fitted to travelling carriage plate with bolts.

High Range

Maximum Torque 155.6 ft-lb, 211Nm
Maximum Spindle Speed 360 r.p.m.

Low Range

Maximum Torque 1089 ft-lb, 1477Nm
Maximum Spindle Speed 52 r.p.m. (Other options available)

Guide Ring: 170mm effective ID

MAST AND CARRIAGE ASSEMBLY

A fabricated welded steel box section construction fitted with a pair of wheels and two levelling jacks. Hydraulically raised and lowered by a single double-acting ram on the main Terrier undercarriage and attached via the pivot frame assembly.

Drilling Angle: 45-90 degrees

Dump Stroke: 400mm

FEED AND HOIST SYSTEM

Provided by a single double-acting ram transmitting adjustable hydraulic load to the rotary head.

Stroke: 2.2m to accommodate 2.0m effective length drill rods.

Stroke: 1.6m to accommodate 1.0m effective length drill rods.

Feed force: 500kgf

CONTROLS AND HYDRAULIC POWER

Hydraulic functions of the hoist/feed and rotation are controlled from the main hydraulic control valve on the Terrier. Hydraulic power is supplied via PTO from the main Terrier hydraulic power pack.

WEIGHT

Dando Terrier base assembly: 754kg

Rotary mast:

Long Mast 2.2 Stroke: 359kg

Short Mast 1.6 Stroke: 265kg

JACK LEGS

Set of stabilising jacks.

OPTIONS

Chalwyn Valve and Spark Arrestor

Wireless Remote for Tracking

Casing Extractor

Lifting kit

Photos

Angle Drilling in Spain

Gold Exploration in Congo

Angle Drilling Terrier at Dando's Factory in the UK

Video