DIFF Subgroup
E21B 33/127 with inflatable sleeve (E21B33/122, E21B33/124 take precedence)
Introduced: September 1968
Title
Titles differ between systems:
IPC: with inflatable sleeve
CPC: with inflatable sleeve (E21B33/122, E21B33/124 take precedence)
Full Title
Full titles differ between systems:
IPC:
Sealing or packing boreholes or wells > in the borehole > Packers; Plugs > with inflatable sleeve
CPC:
Sealing or packing boreholes or wells > in the borehole > Packers; Plugs (used for cementing E21B33/134, E21B33/16) > with inflatable sleeve (E21B33/122, E21B33/124 take precedence)
Of 3 combined children, 0 exist in both systems.
3 codes are CPC-only extensions.
Child Classifications
Navigate with arrow keys, Enter to open