(0)E21B:6/6:
IPC6
SECTION E - FIXED CONSTRUCTIONS
EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS,...
E21B
7/7
<<   >>   E21B044/00 - E21B049/08  

44
/ 00 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 (for non-automatic drilling control, see the operation controlled; automatic feeding from rack and connecting of drilling pipes E 21 B 19/20; controlling pressure or flow of drilling fluid E 21 B 21/08; control systems in general G 05); Systems specially adapted for monitoring a plurality of drilling variables or conditions (means for transmitting measuring-signals from the well to the surface E 21 B 47/12) [3]

Surveying or testing
 

 45
/ 00 Measuring the drilling time or rate of penetration
 

 47
/ 00 Survey of boreholes or wells (monitoring pressure or flow of drilling fluid E 21 B 21/08; geophysical logging G 01 V)

47
/ 01 • Devices for supporting measuring instruments on a drill pipe, rod or wireline (setting or locking tools in boreholes or wells E 21 B 23/00); Protecting measuring instruments in boreholes against heat, shock, pressure or the like [6]  

47
/ 02 • Determining slope or direction (clinometers or direction meters G 01 C)  

47
/ 022 • • of the borehole  

47
/ 024 • • of devices in the borehole (E 21 B 47/022 takes precedence)  

47
/ 026 • • of penetrated ground layers (apparatus for obtaining oriented cores E 21 B 25/16; formation testing E 21 B 49/00)  

47
/ 04 • Measuring depth or liquid level (measuring liquid level in general G 01 F)  

47
/ 06 • Measuring temperature or pressure (measuring temperature in general G 01 K; measuring pressure in general G 01 L)  

47
/ 08 • Measuring diameter (measuring diameter in general G 01 B)  

47
/ 09 • Locating or determining the position of objects in boreholes or wells; Identifying the free or blocked portions of pipes (measuring depth E 21 B 47/04; measuring diameter E 21 B 47/08) [3]  

47
/ 10 • Locating fluid leaks, intrusions, or movements  

47
/ 12 • Means for transmitting measuring-signals from the well to the surface, e.g. for logging while drilling (remote signalling in general G 08)  

47
/ 14 • • using acoustic waves [6]  

47
/ 16 • • • through the drill string or casing [6]  

47
/ 18 • • • through the well fluid [6]  
 

 49
/ 00 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 (sampling in general G 01 N 1/00)

49
/ 02 • by mechanically taking samples of the soil (apparatus for obtaining undisturbed cores E 21 B 25/00; investigation of foundation soil in situ E 02 D 1/00)  

49
/ 04 • • using explosives in boreholes; using projectiles penetrating the wall [3]  

49
/ 06 • • using side-wall drilling tools or scrapers  

49
/ 08 • Obtaining fluid samples or testing fluids, in boreholes or wells [3]  

49
/ 10 • • using side-wall fluid samplers or testers [3]  

 

 

 
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