Geothermal Projects

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  CLOSED LOOP SYSTEM - New House Heating & Cooling - Jardines

  Location:  Jardines, Queenstown, New Zealand
  Client:      The Central Heating Company Ltd                           (Geothermal Heating – TV3 report)
  

  McMillan SDS was contracted to drill 4 x 100m de­ep at 150mm diameter bores, assist with loop installation, and conduct the loop grouting for a new house being built on the shores of Lake Wakatipu. The project also had limited access, and the upper 6-12m of the ground encountered was free running gravel with vast quantities of ground water that required temporary casing to be installed. The free gravel encountered involved modification of the grout mixture for the upper portion of the bores to prevent excessive wastage to the surrounding ground. We selected out HD180 twin rotary rig for the contract, and successfully completed the contract on time and budget.

  Referee
  Albie George from

  The Central Heating Company Ltd – (+64 21 259 1977 )
  

  
  

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• CLOSED LOOP SYSTEM - New House Heating & Cooling - Aspen Grove

  Location:  Aspen Grove, Queenstown, New Zealand
  Client:       The Central Heating Company Ltd

  McMillan SDS was contracted to drill 6 x 30m deep by 100mm diameter bores, assist with loop installation, and conduct the loop grouting for a new house being built on a hill side. The project also had limited access, and the upper 6-12m of the ground encountered was silts with free running gravel with quantities of ground water that required temporary casing to be installed. This installation involved the use of copper tubes with refrigerant; additionally the grouting mix required for this application involved a high porportion of silica sand. We selected out HD180 twin rotary rig for the contract, and successfully completed the contract on time and budget.

  Referee
  Brenda Glanfield from The Central Heating Company Ltd – tel (03) 443 5845