Drilling Stocks List
Symbol | Grade | Name | % Change | |
---|---|---|---|---|
MRM | A | MMA Offshore Ltd | 0.38 | |
SRG | A | SRG Ltd | 1.84 | |
RED | A | Red 5 Limited | 2.33 | |
MAH | A | Macmahon Holdings Limited | -1.96 | |
MCE | A | Matrix Composites & Engineering Limited | 5.71 | |
MSV | A | Mitchell Services Ltd | 1.20 | |
BCN | A | Beacon Minerals Ltd | 3.45 | |
POD | B | Podium Minerals Limited | 4.26 | |
GOR | B | Gold Road Resources Ltd | 0.91 | |
JPR | B | Jupiter Energy Limited | 4.35 |
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- Drilling
Drilling is a cutting process that uses a drill bit to cut a hole of circular cross-section in solid materials. The drill bit is usually a rotary cutting tool, often multi-point. The bit is pressed against the work-piece and rotated at rates from hundreds to thousands of revolutions per minute. This forces the cutting edge against the work-piece, cutting off chips (swarf) from the hole as it is drilled.
In rock drilling, the hole is usually not made through a circular cutting motion, though the bit is usually rotated. Instead, the hole is usually made by hammering a drill bit into the hole with quickly repeated short movements. The hammering action can be performed from outside the hole (top-hammer drill) or within the hole (down-the-hole drill, DTH). Drills used for horizontal drilling are called drifter drills.
In rare cases, specially-shaped bits are used to cut holes of non-circular cross-section; a square cross-section is possible.
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