The structure and work principle of Q series wire line drilling tools Q series wire line drilling tools included core barrel assembly and overshot assembly:Outer tube assembly contains locking coupling,adapter coupling ,landing ring,reaming shell,outer tube,outer tube and bit. inner tube assembly including spearheadpoint,detent mechanism,adjusting mechanism, Pensile institutions, tube assemblyremove institutions, In position news agency and Core jams news agency etc.

Size of Wire-line Core Barrels Assembly:

                             inner tube                              outer tube             
  spec.       outside diameter*thickness   outside diameter*thickness              core diameter            bits standard

BQ size                42*2.5mm                              58*6mm                                     36.4mm                       BQ

NQ size                56*3mm                                 73*6.5mm                                  47.6mm                       NQ

HQ size                73*3mm                                 93*7mm                                     63.5mm                       HQ

PQ size                 93*3mm                                114*6mm                                    85mm                          PQ