DIFF Subgroup
E21B 33/10 in the borehole
Introduced: September 1968
Full Title
Sealing or packing boreholes or wells > in the borehole
IPC and CPC are identically structured here. All 2 subcodes exist in both systems.
1 shared codes have differing titles between IPC and CPC.
Child Classifications
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- E21B 33/12 Packers; Plugs (used for cementing E21B33/134, E21B33/16) +2 CPC IPC+CPC Available in IPC and CPC
- E21B 33/13 Methods or devices for cementing, for plugging holes, crevices or the like IPC+CPC Available in IPC and CPC