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PCE
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DIFF Subgroup
E21B 33/129

with mechanical slips for hooking into the casing (E21B33/122, E21B33/124 take precedence)

Introduced: September 1968

Title

Titles differ between systems:

IPC: with mechanical slips for hooking into the casing

CPC: with mechanical slips for hooking into the casing (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 mechanical slips for hooking into the casing

CPC:

Sealing or packing boreholes or wells > in the borehole > Packers; Plugs (used for cementing E21B33/134, E21B33/16) > with mechanical slips for hooking into the casing (E21B33/122, E21B33/124 take precedence)

CPC subdivides this area 4x more granularly than IPC with 3 additional codes.

3 codes are CPC-only extensions.

IPC defines codes here since 1995.

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