Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables

Child Classifications

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• E21B 19/002 +1 CPC CPC only CPC only
• E21B 19/008 CPC only CPC only
• E21B 19/02 Rod or cable suspensions IPC+CPC Available in IPC and CPC
• E21B 19/08 Apparatus for feeding the rods or cables (E21B19/22 takes precedence; automatic feed E21B44/02); Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods IPC+CPC Available in IPC and CPC
• E21B 19/10 Slips; Spiders +1 CPC IPC+CPC Available in IPC and CPC
• E21B 19/12 Rope clamps IPC+CPC Available in IPC and CPC
• E21B 19/14 Racks, ramps, troughs or bins, for holding the lengths of rod singly or connected; Handling between storage place and borehole (E21B19/20, E21B19/22 take precedence) +2 CPC IPC+CPC Available in IPC and CPC
• E21B 19/16 Connecting or disconnecting pipe couplings or joints (E21B19/20 takes precedence) +4 CPC IPC+CPC Available in IPC and CPC
• E21B 19/18 Connecting or disconnecting drill bit and drilling pipe since 1980 IPC+CPC Available in IPC and CPC
• E21B 19/20 Combined feeding from rack and connecting, e.g. automatically since 1980 IPC+CPC Available in IPC and CPC
• E21B 19/22 Handling reeled pipe or rod units, e.g. flexible drilling pipes since 1980 IPC+CPC Available in IPC and CPC
• E21B 19/24 Guiding or centralising devices for drilling rods or pipes since 2000 IPC+CPC Available in IPC and CPC