Tuam Tshoj Vigor Laum Dab Tshos tau npaj rau cov khoom xa tuaj rau peb cov neeg nyob hauv lub lim tiam no, kom paub meej ntxiv raws li hauv qab no ；
LAUM COLLAR, OD ： 4-3 / 4'', ID: 2.250'', YOOJ YIM: 31FT, DRILL COLLAR GRADE (SMYS): 120KSI, LAUM COLLAR KHOOM: AISI-4145H Hloov Kho (Chromium molybdenum alloy steel), HOM: SLICK, ELEVATOR& KHAUB NCAWS: 16'' / 18''.
