Skip to content
PCE
Search Classifications
Search for IPC and CPC classification codes or keywords
DIFF Subgroup
E21B 33/13

Methods or devices for cementing, for plugging holes, crevices or the like

Introduced: September 1968

Full Title

Sealing or packing boreholes or wells > in the borehole > Methods or devices for cementing, for plugging holes, crevices or the like

IPC and CPC are identically structured here. All 4 subcodes exist in both systems.

Child Classifications

Navigate with arrow keys, Enter to open

  • E21B 33/134 Bridging plugs IPC+CPC Available in IPC and CPC
  • E21B 33/136 Baskets, e.g. of umbrella type IPC+CPC Available in IPC and CPC
  • E21B 33/138 Plastering the borehole wall; Injecting into the formation IPC+CPC Available in IPC and CPC