In this class, the following term is used with the meaning indicated:
-
"drilling" covers boring and vice versa.
E 21 B
EARTH DRILLING, e.g. DEEP DRILLING (mining, quarrying E 21 C; making shafts, driving galleries or tunnels E 21 D); OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS [5]
Methods or apparatus for drilling
1
/
00
Percussion drilling (drives used in the borehole E 21 B 4/00) [3]
1
/
02
•
Surface drives for percussion drilling
1
/
04
•
•
Devices for reversing the movement of the rod or cable at the surface
3
/
00
Rotary drilling (drives used in the borehole E 21 B 4/00; rotary drilling machines in general B 23 B) [3]
3
/
02
•
Surface drives for rotary drilling
3
/
04
•
•
Rotary tables
3
/
06
•
•
•
Adaptation of rotary draw works to drive rotary tables (connecting or disconnecting couplings or joints E 21 B 19/16; rope, cable, or chain winding mechanisms, capstans B 66 D) [3]
4
/
00
Drives used in the borehole [3]
4
/
02
•
Fluid rotary type drives (hydraulic turbines for drilling wells F 03 B 13/02) [3]
4
/
04
•
Electric drives (E 21 B 4/12 takes precedence) [3]
impact being obtained by gravity only, e.g. with lost-motion connection [3]
4
/
10
•
•
continuous unidirectional rotary motion of shaft or drilling pipe effecting consecutive impacts [3]
4
/
12
•
•
Electrically operated hammers [3]
4
/
14
•
•
Fluid operated hammers [3]
4
/
16
•
Plural down-hole drives, e.g. for combined percussion and rotary drilling (E 21 B 4/10 takes precedence); Drives for multi-bit drilling units [3]
4
/
18
•
Anchoring in the borehole [3]
4
/
20
•
combined with surface drive (E 21 B 4/10 takes precedence) [3]
6
/
00
Drives for combined percussion and rotary drilling (drives used in the borehole E 21 B 4/00) [3]
7
/
00
Special methods or apparatus for drilling
7
/
02
•
Portable drilling rigs, truck- or skid-mounted, with their own drive (portable drilling rigs for use on underwater floors E 21 B 7/124)
7
/
04
•
Directional drilling (derricks or masts specially adapted therefor E 21 B 15/04)
7
/
06
•
•
Deflecting the direction of boreholes
7
/
08
•
•
•
Special apparatus for deflecting the boring, e.g. special drill bits, knuckle joints, whipstocks (directional window cutting E 21 B 29/06; deflecting the direction of fishing tools E 21 B 31/14)
7
/
10
•
•
Correction of deflected boreholes
7
/
12
•
Underwater drilling (derricks or masts specially adapted therefor E 21 B 15/02; telescoping joints E 21 B 17/07; using heave compensators
E 21 B 19/09)
7
/
124
•
•
with underwater tool drive prime mover, e.g. portable drilling rigs for use on underwater floors [3]
7
/
128
•
•
from floating support with independent underwater anchored guide base [3]
7
/
132
•
•
from underwater buoyant support [3]
7
/
136
•
•
from non-buoyant support (E 21 B 7/124 takes precedence) [3]
7
/
14
•
Drilling by use of heat, e.g. flame drilling
7
/
15
•
•
of electrically generated heat [3]
7
/
16
•
Applying separate balls or pellets by the pressure of the drill, so-called shot-drilling
7
/
18
•
Drilling by liquid or gas jets, with or without entrained pellets (E 21 B 7/14 takes precedence; hydraulic monitors E 21 C 45/00) [5]
7
/
20
•
Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes (placing piles E 02 D 7/00; sinking shafts while moving the lining downwards E 21 D 1/08) [3]
7
/
22
•
•
Surface means for applying alternating rotation movements to the casing [3]
7
/
24
•
Drilling using vibrating or oscillating means, e.g. out-of-balance masses (percussion drilling E 21 B 1/00) [3]
7
/
26
•
Drilling without earth removal, e.g. with self-propelled burrowing devices (E 21 B 7/30 takes precedence; down-hole drives E 21 B 4/00) [3,6]
7
/
28
•
Enlarging drilled holes, e.g. by counterboring (drill bits for enlarging the borehole E 21 B 10/26) [3]
