Drilling Stocks List
Symbol | Grade | Name | % Change | |
---|---|---|---|---|
NR | F | Newpark Resources, Inc. | -2.10 | |
CHX | F | ChampionX Corporation | -0.96 |
Related Industries: Oil & Gas Equipment & Services
Symbol | Grade | Name | Weight | |
---|---|---|---|---|
XES | F | SPDR S&P Oil & Gas Equipment & Services ETF | 5.56 | |
OIH | F | Market Vectors Oil Services ETF | 5.17 | |
IEZ | F | iShares U.S. Oil Equipment & Services ETF | 4.29 | |
OFOS | F | Range Global Offshore Oil Services Index ETF | 3.17 | |
EVNT | B | AltShares Event-Driven ETF | 2.68 |
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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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