CPC Class Not Allocatable
E21 EARTH OR ROCK DRILLING; MINING
Description
E21 encompasses machinery, equipment, and methods for drilling into the earth and rock, as well as extraction of minerals and other subsurface materials. This class covers drill rigs, drilling tools, borehole equipment, mining machinery, and associated techniques for both onshore and offshore applications. Typical subjects include rotary and percussion drilling systems, wellbore completion, mineral extraction processes, and supporting underground construction activities. Adjacent classes handle specific applications such as oil and gas extraction (subclass E21B), coal mining operations (E21C), and foundational aspects of fixed construction engineering.
4 direct subcodes
Child Classifications
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- E21B EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21C MINING OR QUARRYING
- E21D SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS (soil-conditioning or soil-stabilising materials C09K17/00; drilling or cutting machines for mining or quarrying E21C; safety devices, transport, rescue, ventilation or drainage E21F)
- E21F SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS