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- Preferred Labelskos:prefLabel
vacuum
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- http://resource.geosciml.org/classifier/cgi/boreholedrillingmethod/vacuum ↗Go to the persistent identifier link
- Within Vocab
- Borehole Drilling Method
| Preferred Labelskos:prefLabel | vacuum |
|---|---|
| Definitionskos:definition | Vacuum drilling is principally designed for mineral exploration drilling to provide a low cost, efficient recovery of uncontaminated drill samples. Vacuum Drilling systems comprise a vacuum pump, oil bath filter, sample separator, vacuum swivel and drive shaft adaptor to rotary drilling head. The vacuum pump can be driven either hydraulically or mechanically from the existing drill rig power pack. Alternatively, a separate independent drive source can be provided. Samples are removed from the rod string via the vacuum swivel mounted above the rotary head. Then, cuttings proceed to the two-stage sample separator for removal from the air stream, and are collected in the bulk sample flask. Separated air is then passed through the oil bath filter to be discharged from the vacuum pump. |
| See AlsoseeAlso | Borehole Drilling Method |
| Notationnotation | 11 |
| Is Defined ByisDefinedBy | Borehole Drilling Method |