Drilling & Grouting Services PTY LTD

The City of Canning required the construction of a geothermal production bore and an injection bore at the proposed Mutli-purpose Recreation and Community Centre, to be located in Cannington on the corner of Wharf and Sevenoaks Street. A water supply of about 24 L/s at a temperature of at least 45°C was required for a heat exchange unit to heat the Centre’s swimming pools.

The water was sourced from a bore constructed within the Yarragadee aquifer. After the water has passed through a heat exchange unit, the water is then pumped into an injection bore which will be screened within the upper part of the Yarragadee aquifer.  Project engineers, AECOM were responsible for the design of heat exchange units for the project.

Utilizing our Customised RD20 water bore drilling rig the production and injection bores were successfully drilled at to a depth of 1100m and 700m respectively. The bores were cased and sealed and the geothermal heat exchange system is now operational. This project identified many technical challenges that were no problem for our experienced water well drilling crew. The project was successfully completed within the required timeframe and budget.

DGS Cat Mounted Blast Hole Rig

BHP Billiton owns 86 per cent of the Boddington bauxite mine and Worsley alumina refinery in a joint venture with Japan Alumina and Sojitz.

The Boddington bauxite mine supplies bauxite ore to the Worsley alumina refinery.

DGS supplies four drill rigs on site constisting of Montabert Drifters mounted on CAT Escavators on this long term contract as well as a highly skilled and experienced crew and support team.

The Boddington Bauxite Mine Drilling Project is an excellent example of DGS’s dedication to providing top quality service over the long term.

The MOF will facilitate the offloading of the materials and the components that will be used to construct a major LNG (Liquefied Natural Gas) processing facility on the island. The Gorgon gas fields, off the northwest coast of Western Australia (WA), contain about 40 trillion cubic feet of natural gas and this development currently represents the largest single project underway in the world.

The joint venture partnership between Murray and Roberts Marine with Marine & Civil (known as the MMJV) have undertaken the project on a design and construct basis where the scope of works includes:

The scope of works for the pioneer MOF civil structures for the MMJV includes:

• A 10,000 DWT barge berth and a 200m Ro-Ro vessel berth.
• The barge berth and Ro-Ro vessel berth consist of nine 300t concrete caissons which will be pre-cast in a remote location and shipped to site on a heavy lift vessel.
• A 218m Module Carrier berth comprising a combi-pile wall structure.
• Four berthing and mooring dolphins for the Module Carrier and Ro-Ro vessel and three for the Barge berth. The dolphins will be prefabricated steel tubular jackets with fenders and bollards attached for berthing and mooring.
• A small craft landing and wave screen to accommodate small craft up to 20 m long.
• Two Navigation Aid Support Structures

We have been contracted to carry out the driiling and installation of the caisson structures on a 24hours basis utilising two Wirth Pile Top Rigs

This geotechnical drilling project began in 2010 as part of the larger RGP6 Project at Port Headland.  This project showcases our technical expertise and equipment with a focus on our high quality assurance and safety standards with all plant and equipment meeting full BHP Billiton compliance standards.

• 245 piezo-cone penetration tests to refusal.
• Dissipation testing at selected locations.
• 30 Seismic CPTs with testing at 1m increments to 25m.
• 15 dilatometer tests at 0.25m increments adjacent to every second seismic CPT to 25m.
• Possible shear vane testing at selected locations.
• 24 HQ boreholes to 30m (SPT’s, sampling etc)
• 12 piezometers to 30m (50mm casing)

We used our Boart Longyear 525 Diamond Drilling rigs and in order to bring this project to a close on time and on budget.