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Symbol IPC-Stellen auswählen Titel
A
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HUMAN NECESSITIES
B
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PERFORMING OPERATIONSTRANSPORTING
C
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CHEMISTRYMETALLURGY
D
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TEXTILESPAPER
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 ENGINEERINGFOUNDATIONSSOIL-SHIFTING
E03
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WATER SUPPLYSEWERAGE
E04
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BUILDING
E05
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LOCKSKEYSWINDOW OR DOOR FITTINGSSAFES
E06
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DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS, IN GENERALLADDERS
E21
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EARTH OR ROCK DRILLINGMINING
E21
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EARTH OR ROCK DRILLINGMINING
E21B
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EARTH OR ROCK DRILLINGOBTAINING 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 drillingWell 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 pipesFlexible drill stringsKelliesDrill collarsSucker rodsCasingsTubings [1, 2006.01]
E21B 19/00
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Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrickApparatus 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 sandDrill 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 windowsDeforming of pipes in boreholes or wellsReconditioning 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 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 systemsSystems 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 47/001
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for underwater installations [2012.01]
E21B 47/002
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by visual inspection [2012.01]
E21B 47/003
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Determining well or borehole volumes [2012.01]
E21B 47/005
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Monitoring or checking of cementation quality or level [2012.01]
E21B 47/007
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Measuring stresses in a pipe string or casing (for locating blocked portions of pipes E21B 47/09) [2012.01]
E21B 47/008
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Monitoring of down-hole pump systems, e.g. for the detection of "pumped-off" conditions [2012.01]
E21B 47/009
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. . Monitoring of walking-beam pump systems [2012.01]
E21B 47/01
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Devices for supporting measuring instruments on drill bits, pipes, rods or wirelinesProtecting measuring instruments in boreholes against heat, shock, pressure or the like [6, 2006.01, 2012.01]
E21B 47/013
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. . Devices specially adapted for supporting measuring instruments on drill bits [2012.01]
E21B 47/017
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. . Protecting measuring instruments [2012.01]
E21B 47/02
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Determining slope or direction [1, 2006.01]
E21B 47/022
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. . of the borehole, e.g. using geomagnetism [1, 2006.01, 2012.01]
E21B 47/0224
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. . . using seismic or acoustic means [2012.01]
E21B 47/0228
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. . . using electromagnetic energy or detectors therefor [2012.01]
E21B 47/0232
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. . . . at least one of the energy sources or one of the detectors being located on or above the ground surface [2012.01]
E21B 47/0236
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. . . using a pendulum [2012.01]
E21B 47/024
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. . of devices in the borehole  (determining slope or direction of the borehole E21B 47/022) [1, 2006.01]
E21B 47/026
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. . of penetrated ground layers [1, 2006.01]
E21B 47/04
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Measuring depth or liquid level [1, 2006.01, 2012.01]
E21B 47/047
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. . Liquid level  (measuring depth or liquid level using radioactive markers E21B 47/053) [2012.01]
E21B 47/053
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. . using radioactive markers [2012.01]
E21B 47/06
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Measuring temperature or pressure [1, 2006.01, 2012.01]
E21B 47/07
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. . Temperature [2012.01]
E21B 47/08
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Measuring diameters or related dimensions at the borehole [1, 2006.01, 2012.01]
E21B 47/085
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. . using radiant means, e.g. acoustic, radioactive or electromagnetic [2012.01]
E21B 47/09
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Locating or determining the position of objects in boreholes or wellsIdentifying the free or blocked portions of pipes [3, 2006.01, 2012.01]
E21B 47/092
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. . by detecting magnetic anomalies [2012.01]
E21B 47/095
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. . by detecting acoustic anomalies, e.g. using mud-pressure pulses [2012.01]
E21B 47/098
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. . using impression packers, e.g. to detect recesses or perforations [2012.01]
E21B 47/10
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Locating fluid leaks, intrusions or movements [1, 2006.01, 2012.01]
E21B 47/103
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. . using thermal measurements [2012.01]
E21B 47/107
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. . using acoustic means [2012.01]
E21B 47/11
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. . using tracersusing radioactivity [2012.01]
E21B 47/113
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. . using electrical indicationsusing light radiation [2012.01]
E21B 47/117
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. . Detecting leaks, e.g. from tubing, by pressure testing [2012.01]
E21B 47/12
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Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling [1, 2006.01, 2012.01]
E21B 47/125
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. . using earth as an electrical conductor  (by electromagnetic energy E21B 47/13) [2012.01]
E21B 47/13
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. . by electromagnetic energy, e.g. of radio frequency range [2012.01]
E21B 47/135
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. . . using light waves, e.g. infrared or ultraviolet waves [2012.01]
E21B 47/14
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. . using acoustic waves [6, 2006.01]
E21B 47/16
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. . . through the drill string or casing [6, 2006.01]
E21B 47/18
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. . . through the well fluid [6, 2006.01, 2012.01]
E21B 47/20
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. . . . by modulation of mud waves, e.g. by continuous modulation [2012.01]
E21B 47/22
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. . . . by negative mud pulses using a pressure relief valve between drill pipe and annulus [2012.01]
E21B 47/24
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. . . . by positive mud pulses using a flow restricting valve within the drill pipe [2012.01]
E21B 47/26
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Storing data down-hole, e.g. in a memory or on a record carrier [2012.01]
E21B 49/00
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Testing the nature of borehole wallsFormation testingMethods 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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SHAFTSTUNNELSGALLERIESLARGE 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 ENGINEERINGLIGHTINGHEATINGWEAPONSBLASTING
G
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PHYSICS
H
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ELECTRICITY

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