E21B

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Description

EARTH OR ROCK DRILLING (mining, quarrying E21C; making shafts, driving galleries or tunnels E21D); OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS

Subclasses

SubclassTitle
1/00 Percussion drilling (drives used in the borehole E21B 4/00)
1/02 Percussion drilling (drives used in the borehole E21B 4/00) Surface drives for drop hammers, e.g. with a cable
1/04 Percussion drilling (drives used in the borehole E21B 4/00) Surface drives for drop hammers, e.g. with a cable Devices for reversing the movement of the rod or cable at the surface
1/12 Percussion drilling (drives used in the borehole E21B 4/00) with a reciprocating impulse member (E21B 1/02, E21B 1/38 take precedence)
1/14 Percussion drilling (drives used in the borehole E21B 4/00) with a reciprocating impulse member (E21B 1/02, E21B 1/38 take precedence) driven by a rotating mechanism
1/16 Percussion drilling (drives used in the borehole E21B 4/00) with a reciprocating impulse member (E21B 1/02, E21B 1/38 take precedence) driven by a rotating mechanism with spring-mounted reciprocating masses, e.g. with air cushion
1/18 Percussion drilling (drives used in the borehole E21B 4/00) with a reciprocating impulse member (E21B 1/02, E21B 1/38 take precedence) driven by a rotating mechanism with spring-mounted reciprocating masses, e.g. with air cushion with elastic joining of the drive to the push-rod by double buffer springs
1/20 Percussion drilling (drives used in the borehole E21B 4/00) with a reciprocating impulse member (E21B 1/02, E21B 1/38 take precedence) driven by a rotating mechanism formed as centrifugal hammers
1/22 Percussion drilling (drives used in the borehole E21B 4/00) with a reciprocating impulse member (E21B 1/02, E21B 1/38 take precedence) driven by electromagnets
1/24 Percussion drilling (drives used in the borehole E21B 4/00) with a reciprocating impulse member (E21B 1/02, E21B 1/38 take precedence) the impulse member being a piston driven directly by fluid pressure
1/26 Percussion drilling (drives used in the borehole E21B 4/00) with a reciprocating impulse member (E21B 1/02, E21B 1/38 take precedence) the impulse member being a piston driven directly by fluid pressure by liquid pressure
1/28 Percussion drilling (drives used in the borehole E21B 4/00) with a reciprocating impulse member (E21B 1/02, E21B 1/38 take precedence) the impulse member being a piston driven directly by fluid pressure by liquid pressure working with pulses
1/30 Percussion drilling (drives used in the borehole E21B 4/00) with a reciprocating impulse member (E21B 1/02, E21B 1/38 take precedence) the impulse member being a piston driven directly by fluid pressure by air, steam or gas pressure
1/32 Percussion drilling (drives used in the borehole E21B 4/00) with a reciprocating impulse member (E21B 1/02, E21B 1/38 take precedence) the impulse member being a piston driven directly by fluid pressure by air, steam or gas pressure working with pulses
1/34 Percussion drilling (drives used in the borehole E21B 4/00) with a reciprocating impulse member (E21B 1/02, E21B 1/38 take precedence) the impulse member being a piston driven directly by fluid pressure by air, steam or gas pressure working with pulses the impulse member being a piston of an internal-combustion engine
1/36 Percussion drilling (drives used in the borehole E21B 4/00) Tool-carrier piston type, i.e. in which the tool is connected to an impulse member
1/38 Percussion drilling (drives used in the borehole E21B 4/00) Hammer piston type, i.e. in which the tool bit or anvil is hit by an impulse member
3/00 Rotary drilling (drives used in the borehole E21B 4/00; rotary drilling machines in general B23B)
3/02 Rotary drilling (drives used in the borehole E21B 4/00; rotary drilling machines in general B23B) Surface drives for rotary drilling
3/025 Rotary drilling (drives used in the borehole E21B 4/00; rotary drilling machines in general B23B) Surface drives for rotary drilling with a to-and-fro rotation of the tool

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