Core barrel- single tube/ double tube/ triple tube NQ, HQ, PQ, NQ2, HQ3, PQ3 T2, T6, LTK NMLC, HMLC, ... , BQ, RQ, NQ, HQ, and PQ. T2 Series Double Tube Core Barrels: The T2 Series are thin wall double tube core barrel, used for ... oProductShow = new AE.run.minisite.productShow(); oProductShow.init( { 'aImgSrc': aBigImageSrc } ); } )(); Core barrel assembly NQ, HQ, PQ, NQTT, HQWL, T2, T6, NMLC, HMLC