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PCE
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DIFF Subgroup
E21B 19/18

Connecting or disconnecting drill bit and drilling pipe

Introduced: January 1980

Full Title

Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables > Connecting or disconnecting drill bit and drilling pipe

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