Down-the-hole drilling
DTH hammer drilling
In down-the-hole drilling a drill rod is fitted with a hammer at its lower end. The hammer, which is mounted on the drill bit, is activated through the addition of compressed air and driven into the ground – simultaneously rotating and impacting. A flushing current collects the loosened drill cuttings and conveys them upwards. This method is mainly applied for hard to very hard rock and/or for penetrating large boulders.
Process principle of cased DTH hammer drilling
Video: Down-the-hole drilling
The video shows the down-the-hole drilling method for very hard soil or rock.
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Cased down-the-hole drilling
Discharge of drill cuttings
Video: LB 16 unplugged DTH drilling
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For further information, please refer to our Data Protection Declaration and the Google Privacy Policy.*Google Ireland Limited, Gordon House, Barrow Street, Dublin 4, Ireland; parent company: Google LLC, 1600 Amphitheatre Parkway, Mountain View, CA 94043, USA** Note: The data transfer to the USA associated with the data transmission to Google takes place on the basis of the European Commission’s adequacy decision of 10 July 2023 (EU-U.S. Data Privacy Framework).
