钻铤主要用来给钻头提供钻压，使钻杆处于受拉状态，并以其较大的刚度扶正钻头保持井眼轨迹。生产工艺严格执行API Spec7-1规范及SY/T 5144标准。 表：技术规格及参数钻铤编号外径内径长度(mm)台肩倒角直径参考弯曲强度比(mm)(in)(mm)(in)NC23-3179.43 1/831.81 1/2915076.22.57:1NC26-35(2 3/8 IF)88.93 1/238.11 1/2915082.92.42:1NC31-41(2 7/8 IF)104.84 1/850.829150100.42.43:1NC35-47120.64 3/450.829150114.72.58:1NC38-50(3 1/2 IF)127.0557.22 1/49150121.02.38:1NC44-60152.4657.22 1/49150&9450144.52.49:1NC44-60152.4671.42 13/169150&9450144.52.84:1NC44-62158.86 1/457.22 1/49150&9450149.22.91:1NC46-62(4IF)158.86 1/471.42 13/169150&, , , 9450150.02.63:1NC46-65(4IF)165.16 1/257.22 1/49150&9450154.82.76:1NC46-65(4IF)165.16 1/271.42 13/169150&9450154.83.05:1NC46-67(4IF)171.46 3/457.22 1/49150&9450159.53.18:1NC50-67(4 1/2 IF)171.46 3/471.42 13/169150&9450159.52.37:1NC50-70(4 1/2 IF)177.8757.22 1/49150&9450164.72.54:1NC50-70(4 1/2 IF)177.8771.42 13/169150&9450164.72.73:1NC50-72(4 1/2 IF)184.27 1/471.42 13/169150&9450169.53.12:1NC56-77196.87 3/471.42 13/169150&9450185.32.70:1NC56-80203.2871.42 13/169150&9450190.13.02:16 5/8 REG209.68 1/471.42 13/169150&9450195.72.93:1NC61-90228.6971.42 13/16212.63.17:1 7 5/8 REG241.39 1/276.239150&9450223.82.81:1NC70-97247.69 3/476.239150&9450232.82.57:1NC70-100254.01076.239150&9450237.32.81:18 5/8 REG279.41176.239150&9450266.72.84:1