In 1986, David Boswell and Geoff Walder founded Leonora Drilling who were then joined in 1987 by Peter Boswell. During this time, a productive drilling day was 500m RAB or 300m Aircore. In a display of initiative and ingenuity that would later form the foundation of Bostech Drilling’s methodology, they bought one of the first non-Wallis Aircore systems. This system was poorly designed and it was clear that in order to unlock the true potential in the Aircore system, it needed to undergo serious redevelopment and redesign. The available technology at the time did not drill plastic clays satisfactorily and development of these Aircore systems started from this time right there in the field using a gas welder, a hammer and braising rod.
The faces of the Aircore bits were cut out and the inner tubes modified by partially filling the lower internal section with bronze to stop the clays blocking the inner tube. It was these modifications that began the groundbreaking work Bostech Drilling would later continue to develop the drilling methods and equipment that are so successful today.
When Bostech Drilling evolved from Leonora Drilling in 1993, with Peter Boswell now at the helm of the company, the development of the Aircore system continued. Bostech Drilling is the frontrunner in the development and practice of Aircore drilling, with a fleet of rigs that are some of the most powerful and compact in their class, supported by high-pressure air compressors and boosters, mounted on small all-wheel drive trucks. The original Bedford trucks have been replaced with MAN, Tatra and Isuzu trucks, the 375cfm/125psi Sullair compressors have been replaced with up to 750cfm/430psi Atlas Copco to ensure the most expedient, efficient and effective support to the drilling process available.
Our support equipment includes all wheel drive trucks, self contained camps and satellite phones enabling us to drill anywhere from mine sites to the remote areas of Australia and Africa. While Bostech Drilling Australia operates primarily throughout Western Australia, we have also worked in the Northern Territory, South Australia and in Thailand with RAB and Air-Core rigs designed and manufactured by Bostech Engineering, our manufacturing division. Our clients include many of the world’s most successful mining companies, who have consistently expressed satisfaction with the safety, reliability, quality and productivity of our drilling services. This blend of the best people and equipment provides safe production and the best quality sample available to the industry today.
Bostech Drilling Australia continues to strive to be leading in all we do, with an ongoing commitment to uphold and improve industry standards in safety and drilling. We are a dedicated, efficient, and innovative and safety conscious company with management and staff who adapt readily to new situations and environments. With the experience invested into Bostech, we understand the concerns major mining companies have with operating safe and efficient mining/exploration ventures. We will assist and work together with our clients to achieve the most effective outcome for all concerned.
With our easily adaptable systems, extensive knowledge encompassing a vast variety of drilling conditions, Bostech Drilling Australia can drill clays, sands and hard ground with exceptional results. As pioneers in the Aircore field, Bostech Drilling Australia can provide a drilling service that outshines our competitors. Gone are the days of 500m RAB or 300m Aircore. Bostech Drilling Australia can now provide an average of 600m Aircore in average drilling, 400m in clay, and 800-900m through some types of sand.
| METHOD | HOLESIZE | DEPTH | RIG AIR | COMMENTS |
|---|---|---|---|---|
| RAB | 3 7/8” – 4” | 120 m | 600CFM / 250PSI | Will drill weathered horizon, ground conditions allowing, to 120 metres. |
| Aircore | 85mm – 87mm | 120 m | 600CFM / 250PSI | Will drill weathered horizon to 120 metres (Including Paleo channel) |
| Aircore (Hammer) | 85mm – 87mm | 120 m | 600CFM / 600PSI (Boosted) |
Will drill weathered horizon to 120 metres including Paleo channel, but faster in difficult drilling. |
| Slim Line RC | 95mm – 97mm Face Sampling RC Hammers |
100 m | 600CFM / 600PSI (Boosted) |
Will drill dry holes to 100 meters as fast as 4” RC, and “Wet” holes to approximately 80 metres |
