DIFF Subgroup
E21B 33/122 Multiple string packers
Introduced: September 1968
Title
Titles differ between systems:
IPC: Multiple-string packers
CPC: Multiple string packers
Full Title
Full titles differ between systems:
IPC:
Sealing or packing boreholes or wells > in the borehole > Packers; Plugs > Multiple-string packers
CPC:
Sealing or packing boreholes or wells > in the borehole > Packers; Plugs (used for cementing E21B33/134, E21B33/16) > Multiple string packers
No child classifications to compare. This is a leaf node in both IPC and CPC.