Nordmeyer DSB 0/3

Nordmeyer DSB 0/3

This is a German built multi-purpose hydraulic drilling rig, specifically designed for environmental drilling purposes. Its unique advantage over a standard ‘rotary’ rig is that it has a hydraulically controlled cable percussion mechanism and mast mounted rotary casing unit which allows the simultaneous drilling (by solid stem auger or by steel bailer) and casing of a borehole during advancement. This allows discrete soil sampling, prevention of borehole collapse and prevention of cross-contamination between different water or contamination bearing strata.

In addition to this ‘shell and auger-type drilling’ the rig can be converted to operate in rotary mode once bedrock is reached and casing and/or augering can advance no further. Bedrock penetration by rotary techniques (using either recirculated water or compressed air as a flushing technique) to depths of up to 100 to 150m is then possible, safe in the knowledge that any shallow contamination is being retained outside the upper casing, protecting any aquifer materials encountered.

As well as rotary drilling through rock, this rig can also use hollow stem augers for rapid installation of boreholes in granular/non-cohesive strata or, if conditions dictate, a rotary percussive system (use of DTH hammer to advance casing through dense granular overburden).

This rig is 3.5 tonnes in weight, has the foot print of a standard car and has a mast height of 5.2m. It is transported within an 18 tonne rigid box van along with all the necessary tools and materials to complete the work.

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Technical Specification

Rig Manufacturer Nordmeyer
Model DSB 0/3
Company holding 1
Drilling techniques Rotary open hole (air air-mist/water flush)
Solid stem auger
Hollow stem auger
Cased auger/cable percussion (hydraulic mechanism)
Dynamic Sampling
Open tube sample (U100/UT100) & Standard penetration tests (SPTs)
General/Dimensions
Weight 3.5 tonnes
Width 1.3m
Transport Height 2.2m
Transport Length 5.2m
Working Height (min) 5.2m
Working Length 2.8m
Carriage type Steel reinforced rubber tracks
Transport vehicle 18t rigid box wagon
Engine/Power Supply
Manufacturer & Model Hatz 4L41C
Power 63Hp/47kW
Fitted with chalwyn (shut-down) valve & spark arrestor
Mast/drill head
Drill head stroke 2.3m
Max pull up 3.0t
Max pull down 1.4t
Drill head (1st gear) 6000Nm @ 60rpm
Winch
Main winch – Max hook load 1t
Cable percussion device
Max drill tool weight 200 kg
Stroke height 400mm
Strokes/min 45/min
Clamps & Casing Extractor
Type Single clamp and casing rotator
Max passage diameter 253mm
Max casing diameter 219mm
Min casing diameter 178mm
Clamping force (max) 13.0t
Casing extractor torque 12.0Nm
Casing extractor (Max. pull/stroke) 9.6t/270mm
Hydraulic Hammer
Energy per stroke 200J
Max stroke rate 1500/min
Water Pump
Type Seepex BN30-12T – progressive cavity pump
Flow rate 450 l/min
Pressure 12 bar