Packers; Plugs (used for cementing E21B33/134, E21B33/16)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Packers; Plugs

CPC: Packers; Plugs (used for cementing E21B33/134, E21B33/16)

Full titles differ between systems:

IPC:

Sealing or packing boreholes or wells > in the borehole > Packers; Plugs

CPC:

Sealing or packing boreholes or wells > in the borehole > Packers; Plugs (used for cementing E21B33/134, E21B33/16)

Of 8 combined children, 6 exist in both systems.

2 codes are CPC-only extensions.

5 shared codes have differing titles between IPC and CPC.

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E21B 33/1204 CPC only CPC only
E21B 33/1208 +2 CPC CPC only CPC only
E21B 33/122 Multiple string packers IPC+CPC Available in IPC and CPC
E21B 33/124 Units with longitudinally-spaced plugs for isolating the intermediate space +1 CPC IPC+CPC Available in IPC and CPC
E21B 33/126 with fluid-pressure-operated elastic cup or skirt (E21B33/122, E21B33/124 take precedence) +1 CPC IPC+CPC Available in IPC and CPC
E21B 33/127 with inflatable sleeve (E21B33/122, E21B33/124 take precedence) +3 CPC IPC+CPC Available in IPC and CPC
E21B 33/128 with a member expanded radially by axial pressure (E21B33/122, E21B33/124 take precedence) +1 CPC IPC+CPC Available in IPC and CPC
E21B 33/129 with mechanical slips for hooking into the casing (E21B33/122, E21B33/124 take precedence) +3 CPC IPC+CPC Available in IPC and CPC