DIFF Subgroup
E21B 17/042 Threaded
Introduced: September 1968
Title
Titles differ between systems:
IPC: threaded
CPC: Threaded
Full Title
Full titles differ between systems:
IPC:
Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings > Couplings; Joints > between rod and bit, or between rod and rod > threaded
CPC:
Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings > Couplings; joints > between rod and bit or between rod and rod > Threaded
CPC subdivides this area 3x more granularly than IPC with 2 additional codes.
2 codes are CPC-only extensions.
Child Classifications
Navigate with arrow keys, Enter to open