E21B 23/02 for locking the tools or the like in landing nipples or in recesses between adjacent sections of tubing (E21B23/03 - E21B23/06 take precedence)
Introduced: September 1968
Title
Titles differ between systems:
IPC: for locking the tools or the like in landing nipples or in recesses between adjacent sections of tubing
CPC: for locking the tools or the like in landing nipples or in recesses between adjacent sections of tubing (E21B23/03 - E21B23/06 take precedence)
Full Title
Full titles differ between systems:
Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells > for locking the tools or the like in landing nipples or in recesses between adjacent sections of tubing
Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells (setting of casings, screens or liners E21B43/10) > for locking the tools or the like in landing nipples or in recesses between adjacent sections of tubing (E21B23/03 - E21B23/06 take precedence)
No child classifications to compare. This is a leaf node in both IPC and CPC.