... quartz, ironstone, chert, abrasive rock etc. Including impregnated diamond core bit, surface-set diamond bit, reaming shells, casing bit ... size 35-146mm. Wireline Triple Tube Core Brrels:Wireline triple tube core barrels are generally required in broken, ... AE.run.minisite.productShow(); oProductShow.init( { 'aImgSrc': aBigImageSrc } ); } )(); Core barrel assembly NQ, HQ, PQ, NQTT, HQWL, T2, T6, NMLC ...