我公司是中石油、中石化石油钻具的主要供应商。公司生产的钻铤采用AISI 4145H铬钼钢制造，执行API规范及SY/T5144标准，可对螺纹进行冷滚压、镀铜或磷化处理，可加工双台肩螺纹及其它规格的特殊螺纹，可生产外径最大14英寸的钻铤。目前我公司具有年产钻铤20000支的生产能力，产品销往全国各大油田，并出口国外。     钻铤的标准尺寸、内径及螺纹钻铤编号外径D内径d长度L mm台肩倒角直径DF      mm弯曲强度比mminmminNC23-3179.43 1/831.81 1/4915076.22.57:1NC26-3588.93 1/238.11 1/2915082.92.42:1NC31-41104.84 1/850.829150或9450100.42.43:1NC35-47120.74 3/450.829150或9450114.72.58:1NC38-50127.0557.22 1/49150或9450121.02.38:1NC44-60152.4657.22 1/49150或9450144.52.49:1NC44-60152.4671.42 13/169150或9450144.52.84:1NC44-62158.86 1/457.22 1/49150或9450149.22.91:1NC46-62158.86 1/471.42 13/169150或9450150.02.63:1NC46-65165.16 1/257.22 1/49150或9450154.82.76:1NC46-65165.16 1/271.42 13/169150或9450154.83.05:1NC46-67171.46 3/457.22 1/49150或9450159.53.18:1NC50-67171.46 3/471.42 13/169150或9450159.52.37:1NC50-70177.8757.22 1/49150或9450164.72.54:1NC50-70177.8771.42 13/169150或9450164.72.73:1NC50-72184.27 1/471.42 13/169150或9450169.53.12:1NC56-77196.87 3/471.42 13/169150或9450185.32.70:1NC56-80203.2871.42 13/169150或9450190.13.02:16 5/8REG209.68 1/471.42 13/169150或9450195.72.93:1NC61-90228.6971.42 13/169150或9450212.73.17:17 5/8REG241.39 1/276.239150或9450223.82.81:1NC70-97247.69 3/476.239150或9450232.62.57:1NC70-100254.01076.239150或9450237.32.81:18 5/8REG279.41176.239150或9450266.72.84:1  钻铤的力学性能 外径范围屈服强度σ0.2MPa抗拉强度σbMPa伸长率δ4%布氏硬度HB夏比冲击功Ak  Jmmin79.4~171.43 1/8~6 3/4≥758≥965≥13≥285≥54177.8~279.47~11≥689≥930  钻铤的主要公差尺寸 外径范围外径D内径d长度L台肩倒角直径DF mmin≤88.9≤3 1/2+1.20+1.60±152.4±0.4＞88.9~114.3＞3 1/2~4 1/2+1.60＞114.3~139.7＞4 1/2~5 1/2+2.00＞139.7~165.1＞5 1/2~6 1/2+3.20＞165.1~215.9＞6 1/2~8 1/2+4.00＞215.9~241.3＞8 1/2~9 1/2+4.80＞241.3＞9 1/2+6.40 钻铤螺纹连接部位应力分散槽 螺纹类型内螺纹台肩面至最后一牙刻痕长度Lx±1.59mm内螺纹圆柱段直径Dcb+0.40－0mm内螺纹圆柱段后的锥孔锥度±20.83mm/m外螺纹槽直径DRC+0－0.79mm可替代内螺纹台肩面至应力分散槽长度LRG+0－3.18mmNC3582.682.15166.6782.1585.73NC3888.988.11166.6789.1092.08NC40101.692.87166.6795.81104.78NC44101.6101.60166.67106.36104.78NC46101.6106.76166.67109.93104.78NC50101.6117.48166.67120.45104.78NC56114.3121.84250.00134.04117.48NC61127.0132.95250.00148.31130.18NC70139.7152.00250.00170.54142.88NC77152.4166.29250.00188.01155.586 5/8REG114.3134.14166.67137.59117.487 5/8REG120.7148.83250.00161.26123.838 5/8REG123.8172.24250.00185.45127.00          钻铤吊卡槽、卡瓦槽尺寸 钻铤外径吊卡槽深度±0.2R1c角度αb卡瓦槽深度±0.4角度βb101.6~117.55.63.2±0.44°4.83.5°120.6~142.96.43.2±0.45°4.83.5°146.0~168.37.93.2±0.46°6.45°171.4~219.19.54.8±0.87.5°6.45°≥222.211.16.4±0.89°6.4