Skip to content
PCE
Search Classifications
Search for IPC and CPC classification codes or keywords
DIFF Subgroup
E21B 10/08

Roller bits (E21B10/26 takes precedence; roller core bits E21B10/06; characterised by wear resisting parts E21B10/50)

Introduced: January 1980

Title

Titles differ between systems:

IPC: Roller bits

CPC: Roller bits (E21B10/26 takes precedence; roller core bits E21B10/06; characterised by wear resisting parts E21B10/50)

Full Title

Full titles differ between systems:

IPC:

Drill bits > Roller bits

CPC:

Drill bits (specially adapted for deflecting the direction of boring ; with means for collecting substances E21B27/00) > Roller bits (E21B10/26 takes precedence; roller core bits E21B10/06; characterised by wear resisting parts E21B10/50)

Of 9 combined children, 7 exist in both systems.

2 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 1980.

Child Classifications

Navigate with arrow keys, Enter to open

  • E21B 10/083 CPC only CPC only
  • E21B 10/086 CPC only CPC only
  • E21B 10/10 with roller axle supported at both ends since 1980 IPC+CPC Available in IPC and CPC
  • E21B 10/12 with discs cutters since 1980 IPC+CPC Available in IPC and CPC
  • E21B 10/14 combined with non-rolling cutters other than of leading-portion type since 1980 IPC+CPC Available in IPC and CPC
  • E21B 10/16 characterised by tooth form or arrangement since 1980 IPC+CPC Available in IPC and CPC
  • E21B 10/18 characterised by conduits or nozzles for drilling fluids since 1980 IPC+CPC Available in IPC and CPC
  • E21B 10/20 characterised by detachable or adjustable parts, e.g. legs or axles since 1980 IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class E21,2013–2023, worldwide · Source: EPO PATSTAT

  1. HALLIBURTON ENERGY SERVICES GROUP US 26,607
  2. PETROCHINA COMPANY 14,382
  3. SINOPEC (CHINA PETROCHEMICAL CORPORATION) 10,137
  4. CNPC (CHINA NATIONAL PETROLEUM CORPORATION) 6,517
  5. BAKER HUGHES US 6,269
  6. SCHLUMBERGER TECHNOLOGY US 5,929
  7. SAUDI ARABIAN OIL COMPANY SA 5,880
  8. SOUTHWEST PETROLEUM UNIVERSITY 4,477
  9. CHINA UNIVERSITY OF MINING AND TECHNOLOGY 4,357
  10. SCHLUMBERGER TECHNOLOGY NL 4,219

Top Applicants (CPC)

Class E21,2013–2023, worldwide · Source: EPO PATSTAT

  1. HALLIBURTON ENERGY SERVICES GROUP US 27,652
  2. SAUDI ARABIAN OIL COMPANY SA 7,755
  3. PETROCHINA COMPANY 7,025
  4. BAKER HUGHES US 6,589
  5. SCHLUMBERGER TECHNOLOGY US 6,151
  6. SINOPEC (CHINA PETROCHEMICAL CORPORATION) 4,443
  7. SCHLUMBERGER TECHNOLOGY NL 4,255
  8. CNPC (CHINA NATIONAL PETROLEUM CORPORATION) 3,991
  9. SERVICES PETROLIERS SCHLUMBERGER FR 3,300
  10. SCHLUMBERGER CANADA CA 3,086