... barrel- single tube/ double tube/ triple tube NQ, HQ, PQ, NQ2, HQ3, PQ3 T2, T6, LTK NMLC, HMLC, ... in AQ, BQ, RQ, NQ, HQ, and PQ. T2 Series Double Tube Core Barrels: The T2 Series ... . Available diameter size 35-146mm. Wireline Triple Tube Core Brrels:Wireline triple tube core barrels are generally ... { 'aImgSrc': aBigImageSrc } ); } )(); Core barrel assembly NQ, HQ, PQ, NQTT, HQWL, T2, T6, NMLC, HMLC