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

Child Classifications

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• E21B 29/002
• E21B 29/02 by explosives or by thermal or chemical means
• E21B 29/04 Cutting of wire lines or the like (E21B29/02 takes precedence)
• E21B 29/06 Cutting windows, e.g. directional window cutters for whipstock operations ( E21B29/08 take precedence)
• E21B 29/08 Cutting or deforming pipes to control fluid flow
• E21B 29/10 Reconditioning of well casings, e.g. straightening
• E21B 29/12 specially adapted for underwater installations (E21B29/08 takes precedence)