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IPC entry: E21B 34/06 1-dot subgroup [Version 2024.01 (current), Language EN - English]

Symbol Select IPC entry Title
A
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HUMAN NECESSITIES
B
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PERFORMING OPERATIONS; TRANSPORTING
C
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CHEMISTRY; METALLURGY
D
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TEXTILES; PAPER
E
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FIXED CONSTRUCTIONS
E01
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BUILDING
E01
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CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
E02
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HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL-SHIFTING
E03
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WATER SUPPLY; SEWERAGE
E04
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BUILDING
E05
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LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
E06
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DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS, IN GENERAL; LADDERS
E21
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EARTH OR ROCK DRILLING; MINING
E21
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EARTH OR ROCK DRILLING; MINING
E21B
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EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS [5]
E21B 1/00
Methods or apparatus for drilling
E21B 1/00
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Percussion drilling [1, 3, 2006.01]
E21B 3/00
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Rotary drilling [1, 3, 2006.01]
E21B 4/00
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Drives for drilling, used in the borehole [3, 2006.01]
E21B 6/00
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Drives for drilling with combined rotary and percussive action [3, 2006.01]
E21B 7/00
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Special methods or apparatus for drilling [1, 7, 2006.01]
E21B 10/00
Drilling tools
E21B 10/00
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Drill bits (specially adapted for deflecting the direction of boring E21B 7/08; with means for collecting substances E21B 27/00) [3, 2006.01]
E21B 11/00
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Other drilling tools [1, 2006.01]
E21B 12/00
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Accessories for drilling tools [3, 2006.01]
E21B 15/00
Other equipment or details for drilling; Well equipment or well maintenance
E21B 15/00
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Supports for the drilling machine, e.g. derricks or masts [1, 7, 2006.01]
E21B 17/00
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Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings [1, 2006.01]
E21B 19/00
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Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables [1, 2006.01]
E21B 21/00
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Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor (freeing objects stuck in boreholes by flushing E21B 31/03) [1, 2, 7, 2006.01]
E21B 23/00
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Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells  (setting of casings, screens or liners E21B 43/10) [1, 2006.01]
E21B 25/00
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Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors  (core bits E21B 10/02) [1, 2006.01]
E21B 27/00
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Containers for collecting or depositing substances in boreholes or wells, e.g. bailers for collecting mud or sand; Drill bits with means for collecting substances, e.g. valve drill bits [1, 6, 2006.01]
E21B 28/00
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Vibration generating arrangements for boreholes or wells, e.g. for stimulating production (for transmitting measuring-signals E21B 47/14; for geophysical measurements G01V 1/02) [6, 2006.01]
E21B 29/00
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Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground [1, 2006.01]
E21B 31/00
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Fishing for or freeing objects in boreholes or wells [1, 2006.01]
E21B 33/00
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Sealing or packing boreholes or wells [1, 2006.01]
E21B 34/00
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Valve arrangements for boreholes or wells [3, 2006.01]
E21B 34/02
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. in well heads [3, 2006.01]
E21B 34/04
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. . in underwater well heads [3, 2006.01]
E21B 34/06
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. in wells [3, 2006.01]
E21B 34/08
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. . responsive to flow or pressure of the fluid obtained (E21B 34/10 takes precedence) [3, 2006.01]
E21B 34/10
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. . operated by control fluid supplied from outside the borehole [3, 2006.01]
E21B 34/12
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. . operated by movement of casings or tubings [3, 2006.01]
E21B 34/14
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. . operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools [3, 2006.01]
E21B 34/16
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. Control means therefor being outside the borehole [3, 2006.01]
E21B 35/00
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Methods or apparatus for preventing or extinguishing fires [1, 2006.01]
E21B 36/00
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Heating, cooling or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones [3, 2006.01]
E21B 37/00
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Methods or apparatus for cleaning boreholes or wells (E21B 21/00 takes precedence) [1, 2006.01]
E21B 40/00
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Tubing catchers, automatically arresting the fall of oil-well tubing [1, 2006.01]
E21B 41/00
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Equipment or details not covered by groups E21B 15/00-E21B 40/00 [1, 2006.01]
E21B 43/00
Obtaining fluids from wells [3]
E21B 43/00
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Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells (applicable only to water E03B) [1, 2006.01]
E21B 44/00
Automatic control [3]
E21B 44/00
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Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions [3, 2006.01]
E21B 45/00
Surveying or testing
E21B 45/00
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Measuring the drilling time or rate of penetration [1, 2006.01]
E21B 47/00
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Survey of boreholes or wells (monitoring pressure or flow of drilling fluid E21B 21/08) [1, 2006.01, 2012.01]
E21B 49/00
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Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells [1, 2006.01]
E21C
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MINING OR QUARRYING
E21D
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SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS (soil-conditioning or soil-stabilising materials C09K 17/00; cutting machines for mining or quarrying E21C; safety devices, transport, rescue, ventilation or drainage E21F) [2, 6]
E21F
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SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINAGE IN OR OF MINES OR TUNNELS [2]
E99
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SUBJECT MATTER NOT OTHERWISE PROVIDED FOR IN THIS SECTION [2006.01]
F
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MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
G
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PHYSICS
H
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ELECTRICITY

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