DRILLING MANUAL - Geoscience

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Record 2004-007DRILLING MANUALJN DUNSTERNORTHERN TERRITORY GEOLOGICAL SURVEYNorthern Territory GovernmentDepartment of Business, Industry & Resource DevelopmentiNORTHERN TERRITORY DEPARTMENT OF BUSINESS,INDUSTRY AND RESOURCE DEVELOPMENTGeological Survey Record2004-007Drilling manualJN DunsterNorthern Territory GovernmentDepartment of Business, Industry & Resource DevelopmentNorthern Territory Geological SurveyDarwin, 2004iiDEPARTMENT OF BUSINESS, INDUSTRY AND RESOURCE DEVELOPMENTMINISTER: Hon Kon Vatskalis, MLACHIEF EXECUTIVE OFFICER: Mike BurgessNORTHERN TERRITORY GEOLOGICAL SURVEYDIRECTOR: Richard BrescianiniBIBLIOGRAPHIC REFERENCE: Dunster JN, 2004. DRILLING MANUAL . Northern Territory Geological Survey, Record 2004-007.(Record / Northern Territory Geological Survey ISSN 1443-1149)BibliographyISBN 0 7245 7085 3Keywords: DRILLING , core DRILLING , diamond DRILLING , DRILLING problems, RC DRILLING , slim hole DRILLING , stratigraphic DRILLING ,wire line DRILLING , DRILLING equipment, DRILLING fluidsEDITORS: PD Kruse and TJ MunsonFor further information contact: Geoscience InformationNorthern Territory Geological SurveyGPO Box 3000Darwin NT 0801Phone: +61 8 8999 6443Website: Northern Territory Government 2004DisclaimerWhile all care has been taken to ensure that information contained in Northern Territory Geological

drillstring and bits which cut by scraping (blade bit), point pressure chipping (roller bit with three cones of steel or tungsten carbide teeth) or percussion (rotary downhole hammer with rounded tungsten carbide buttons; 10-40 rpm). Figure 1 shows a selection of bits used in open hole drilling.

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