Entity: diamond core
URI: https://data.geoscience.earth/ncl/DrillingMethod/diamondCore
Type: Concept
no description supplied
experimental
| broader |
core drilling
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| definition |
Diamond core drilling (or diamond drilling) utilizes an annular diamond- or tungsten-carbide-impregnated drill bit attached to the end of hollow drill rods to cut a cylindrical core of solid rock. The diamonds used are fine to microfine industrial grade diamonds. They are set within a matrix of varying hardness, from brass to high-grade steel. Matrix hardness, diamond size and dosing can be varied according to the rock which must be cut. Holes within the bit allow water to be delivered to the cutting face. This provides three essential functions: lubrication, cooling, and removal of drill cuttings from the hole. Core samples are retrieved via the use of a core tube, a hollow tube placed inside the rod string and pumped with water until it locks into the core barrel. As the core is drilled, the core barrel slides over the core as it is cut. An "overshot" attached to the end of the winch cable is lowered inside the rod string and locks on to the backend (aka head assembly), located on...
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| narrower |
conventional core
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| notation |
4.1
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| pref label |
diamond core
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| source |
diamond core drilling
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| type |
Concept
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| date accepted |
23 janv. 2019 11:20:30.860
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| date submitted |
23 janv. 2019 11:20:10.673
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| definition |
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| item class |
Concept
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| label |
diamond core
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| notation |
diamondCore
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| register |
drilling method
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| status |
status experimental
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| submitter |
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| type |
register item
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| version info |
2
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