... , casing bit, casing shoe bit, corelifter, corelifter case, core barrel assembly, inner tube head assembly, over shot, hoist plugs, ... BQ, RQ, NQ, HQ, and PQ. T2 Series Double Tube Core Barrels: The T2 Series are thin wall double tube core barrel ... AE.run.minisite.productShow(); oProductShow.init( { 'aImgSrc': aBigImageSrc } ); } )(); Core barrel assembly NQ, HQ, PQ, NQTT, HQWL, T2, T6, NMLC, HMLC