... casing bit, casing shoe bit, corelifter, corelifter case, core barrel assembly, inner tube head assembly, ... compensate for the difference in overall reaming shell length. Combined high quality and design ... Series: RWT, EWT, AWT, BWT, NWT, HWT (Single Tube/Double Tube) WG Series: EWG, AWG, BWG, ... specifications or catalog. Surface-set diamond reaming shell NQ & HQ impregnated diamond core bit 6mm ...