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PCE
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CPC Subgroup
E21B 29/06

Cutting windows, e.g. directional window cutters for whipstock operations ( E21B29/08 take precedence)

Full Title

Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground > Cutting windows, e.g. directional window cutters for whipstock operations ( E21B29/08 take precedence)