GEOTECHNICAL DRILLING SERVICES

With six dedicated Geotech machines operating from our Melbourne, Brisbane and Sydney depots, Numac Drilling Services has one of the most diverse geotechnical drilling fleets in Australia. A mix of truck-mounted and crawler-mounted drilling machines allows us to access restricted metropolitan sites and remote regional areas effectively, and provide industry-leading geotechnical sampling and testing.

All of our highly skilled geotech drillers are fully qualified, holding Certificate III in Drilling Operations and a minimum Class 1 Water-Well Licence. We are a versatile drilling contractor with our major clients including engineering firms, mining companies, Australian Defence, tailings storage facilities, dams and major government infrastructure projects. With the addition of Sonic drilling rigs and Geoprobe® mounted cone penetration testing (CPT) systems to our drill rig fleet, we can now offer a comprehensive service for any geotechnical investigation.


Diamond coring produces little noise and dust, and doesn’t transfer vibrations to structures nearby, making it ideal for use in metropolitan and residential areas.

Diamond coring produces little noise and dust, and doesn’t transfer vibrations to structures nearby, making it ideal for use in metropolitan and residential areas.

DIAMOND CORING

  • Conventional coring NMLC

  • Wireline coring NQ3, HQ3, PQ3

  • Track mounted compact machines for limited access locations

  • Vertical and angled holes.


CONE PENETRATION TESTING (CPT)

  • NOVA CPT cone mounted on Geoprobe® rig

  • Operable on light track-mounted machines for difficult access locations

  • Anchor system to ensure rig stability

  • Complete sampling and well installation with the same machine - No need to mobilise additional rigs!

The data extracted from a cone penetration test helps site assessors in determining the liquefaction-triggering resistance present in each layer of soil.

The data extracted from a cone penetration test helps site assessors in determining the liquefaction-triggering resistance present in each layer of soil.


SPT & SHELBY TUBE 

  • Fully automatic SPT hammers

  • Large and small track-mounted machines with SPT capability

  • All SPT hammers enclosed in the safety cage

  • Multipurpose sonic rigs with automatic SPT hammers

  • Shelby tubes (U-Tubes).

Standard penetration tests (SPT) using Shelby tubes take undisturbed samples of soft clays and cohesive silts under high pressure.

Standard penetration tests (SPT) using Shelby tubes take undisturbed samples of soft clays and cohesive silts under high pressure.


TUBEX AND CASING ADVANCE SYSTEMS

  • PWT tubex (Simcas) system for advancing casing through fractured rock formations with air

  • HWT casing advancer allows fast and continuous casing of unconsolidated formations with wire-line removal of the bit to allow sampling.

Tubex and casing advancer systems are cost-effective and deliver great results with less material left behind in the borehole.

Tubex and casing advancer systems are cost-effective and deliver great results with less material left behind in the borehole.


Numac provides thermocouple, extensometer, VWP and inclinometer installations across Australia.

Numac provides thermocouple, extensometer, VWP and inclinometer installations across Australia.

GEOTECH INSTRUMENT INSTALLATION

  • Vibrating Wire piezometers (VWP)

  • Inclinometers

  • Extensometers

  • Water level monitoring wells

  • Landfill thermocouple installation.


PNEUMATIC AND HYDRAULIC PACKER TESTS

  • Straddle Packer test equipment for pressure testing specific zones within cored holes once drilling is complete

  • Single packer system for pressure testing during coring

  • Mono pumps for constant pressure.

Packer testing is a simple yet highly effective method of assessing hydraulic conductivity in a section of a borehole.

Packer testing is a simple yet highly effective method of assessing hydraulic conductivity in a section of a borehole.