... granite, quartz, ironstone, chert, abrasive rock etc. Including impregnated diamond core bit, surface-set diamond bit, reaming shells, casing bit, ... formation conditions ranging from broken and abrasive to consolidated and non-abrasive. As this kind of reaming ... .minisite.productShow(); oProductShow.init( { 'aImgSrc': aBigImageSrc } ); } )(); Diamond reaming shell NQ, HQ, PQ, NQTT, HQWL, T2, T6, NMLC ...