Fishing for or freeing objects in boreholes or wells

Child Classifications

Navigate with arrow keys, Enter to open

• E21B 31/002 CPC only CPC only
• E21B 31/005 CPC only CPC only
• E21B 31/007 CPC only CPC only
• E21B 31/03 Freeing by flushing since 1980 IPC+CPC Available in IPC and CPC
• E21B 31/035 CPC only CPC only
• E21B 31/06 using magnetic means IPC+CPC Available in IPC and CPC
• E21B 31/08 using junk baskets or the like IPC+CPC Available in IPC and CPC
• E21B 31/107 using impact means for releasing stuck parts, e.g. jars since 1980 +1 CPC IPC+CPC Available in IPC and CPC
• E21B 31/12 Grappling tools, e.g. tongs or grabs +1 CPC IPC+CPC Available in IPC and CPC