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PCE
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DIFF Subgroup
E21B 10/30

Longitudinal axis roller reamers, e.g. reamer stabilisers

Introduced: January 1980

Full Title

Full titles differ between systems:

IPC:

Drill bits > Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers > with non-expansible roller cutters > Longitudinal axis roller reamers, e.g. reamer stabilisers

CPC:

Drill bits (specially adapted for deflecting the direction of boring ; with means for collecting substances E21B27/00) > Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers (percussion drill bits with leading portion E21B10/40) > with non-expansible roller cutters > Longitudinal axis roller reamers, e.g. reamer stabilisers

No child classifications to compare. This is a leaf node in both IPC and CPC.