Concept
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- Preferred Labelskos:prefLabel
direct push
- URI
- http://resource.geosciml.org/classifier/cgi/boreholedrillingmethod/direct_push ↗Go to the persistent identifier link
- Within Vocab
- Borehole Drilling Method
| Preferred Labelskos:prefLabel | direct push |
|---|---|
| Definitionskos:definition | Direct push technology includes several types of drilling rigs and drilling equipment which advances a drill string by pushing or hammering without rotating the drill string. Direct push rigs include both cone penetration testing rigs and direct push sampling rigs such as a PowerProbe or Geoprobe. Direct push rigs typically are limited to drilling in unconsolidated soil materials and very soft rock. Direct push drilling rigs use hydraulic cylinders and a hydraulic hammer in advancing a hollow core sampler, typically no longer than 2 metres, to gather soil and groundwater samples. The core pipe has a valve on top that is used to create a vacuum at the top of the core when pulling the core out of the sediment. The method can be used in up to 5m of water. |
| Narrowernarrower |
Delft sampler
Geoprobe core gravity core Kasten core Mackereth core piston core window sampler |
| Broaderbroader |
core drilling
|
| See AlsoseeAlso | Borehole Drilling Method |
| Notationnotation | 4.2 |
| Is Defined ByisDefinedBy | Borehole Drilling Method |