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Geotechnical data directly impacts the viability of your project. That’s why J&S Drilling has built a team of only the most committed and knowledgeable drillers

We seamlessly integrate with your workflows to deliver the most accurate, high-quality samples. Our geotechnical drilling services have formed the foundation of the most successful operations across Australia for over 40 years.

Geotechnical Drilling Experts

Why choose J&S?

Specialised geotechnical knowledge

200+ years combined geotechnical experience with a commitment to quality, safety and environmental standards.

Project efficiency

Well-maintained equipment and advanced operation technologies maximise drilling efficiency and minimise site disturbance.

Meticulous management

Superior communication and project management that integrates seamlessly with engineering consulting workflows and project schedules.

Technical reporting support

Detailed drilling logs and geotechnical data presentation that directly support engineering analysis and regulatory submissions.

J&S is ready when you are. Get your detailed project quote today!

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Geotechnical Drilling

Geotechnical drilling methods

Specialised geotechnical knowledge

Executes complex foundation investigations with environmentally approved drilling fluids that ensure enhanced borehole stability in all ground conditions.

Diamond core drilling

Enhance geological data with precision diamond core drilling at diameter capabilities of NQ, HQ, PQ with high recovery rates. This method allows seamless precision testing through the drill string.

Sonic drilling

Unearth core samples with minimal disturbance. Our high-frequency sonic technology enables continuous sampling across diverse geological formations in challenging geotechnical projects.

Direct push

Advance geotechnical sampling through soft formations. Ideal for geotechnical site characterisation and groundwater monitoring installations.

Auger hollow & solid flight

Conduct shallow geotechnical investigations. Hollow stem augers enable simultaneous drilling and sampling while solid augers provide rapid advancement through suitable formations.

Geotechnical Drilling Testing & Samples

Critical data collection

Determine in-situ soil and rock properties with precision and reliability. Geotechnical teams trust us to deliver high-quality samples efficiently.

  • Down-hole surveys: Accurate borehole positioning and deviation control
  • Core orientation: Precise structural geology analysis
  • SPTs / DCPs: Standard penetration testing and dynamic cone penetrometer
  • Push tubes / U-tubes: Collect soil samples with minimal disturbance, preserving their natural structure and composition, essential for accurate laboratory analysis
  • Sonic sampling – single / dual wall and aqua-lock: Superior sample recovery with minimal disturbance
  • Dennison sampler: High-quality undisturbed sampling techniques
  • Vane shears: In-situ soil strength determination
  • Packer testing (NQ, HQ, PQ): Permeability and hydraulic conductivity assessment
  • Piston sampler: Premium undisturbed sampling for laboratory analysis 

Latest Projects

Drilling just delivered

truck-mounted multi-scope geotechnical and exploration drilling rig
Northern Goldfields WA

Multi-scope Geotechnical Drilling Program
L. Balandra operating Rig 12 during a geotechnical drilling project
Pilbara Geotechnical Investigation WA

Delivering Critical Geotechnical Data

All projects

client reviews

Heard on site

“On behalf of KNPL, your team has done a incredible job. The level of professionalism, pride and care factor the team has shown in their work has been outstanding. It’s been a pleasure to see how consistently high standards are maintained, both in quality of work delivered and in the way the team carry themselves each day. The commitment to safety and the strong team culture you have at J&S is equally as commendable. Thank you for creating a safe and supportive work environment and delivering us a safe and successful drill program. Much appreciated.”
“I would like to take the time to thank you for the work that was completed at our home. The crew that completed the drilling were exceptional, they explained the complete process and did it without fuss. I think I’ve learnt a little about drilling myself or at least more than you thought I did. Once again thank you I will certainly be very happy to recommend you to anyone.”

Frequently Asked Questions

Answers to your geotechnical drilling questions

J&S Drilling’s techniques are designed to preserve in situ soil and rock properties. Our rotary mud drilling systems use environmentally approved fluids to maintain borehole stability while preventing sample contamination. Sonic drilling technology provides continuous, undisturbed samples, while our diamond core drilling achieves high recovery rates essential for characterising the rock mass.

We coordinate closely with your site investigation programs, foundation design schedules, and reporting timelines. Our drilling logs and geotechnical data are formatted to support engineering analysis, bearing capacity calculations, and regulatory submissions for development approvals. If you have a particular way you’d like us to work, we’re happy to design our operations around yours.

We’re meticulous around technical reporting. We provide detailed drilling logs and borehole completion records to align with AS 1726 standards. Our documentation directly supports foundation design, slope stability analysis, and regulatory submissions.

Project delivery depends on site conditions, access constraints, and investigation scope. It’s best to get in touch so we can coordinate a timeline that works best for you.

We provide diamond core drilling at NQ, HQ, and PQ diameters. Our core orientation capabilities support structural geology analysis, discontinuity mapping, and rock mass strength assessments critical for foundation design and slope stability analysis.

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quote

J&S is ready when you are.
Get your detailed project quote today!

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