普通钻铤技术参数.doc

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1、普通钻铤技术参数表1钻铤的尺寸规格钻铤螺纹型号外径D内径d长度Lmm台肩倒角直径DFmm参考的弯曲强度比mminmminNC23-3179.431/831.811/4915076.22.57:1NC26-35(23/8IF)88.931/238.111/2915082.92.42:1NC31-41(27/8IF)104.841/850.829150100.42.43:1NC35-47120.743/450.829150114.72.58:1NC3850(31/2IF)127.0557.221/49150121.02.38:1NC44-

2、60152.4657.221/49150或9450144.52.49:1NC44-62158.861/457.221/49150或9450149.22.91:1NC46-62(4IF)158.861/471.4213/169150或9450150.02.63:1NC46-65(4IF)165.161/257.221/49150或9450154.82.76:1NC46-65(4IF)165.161/271.4213/169150或9450154.83.05:1NC46-67(4IF)171.463/457.221/49150或94501

3、59.53.18:1NC50-67(41/2IF)171.463/471.4213/169150或9450159.52.37:1NC50-70(41/2IF)177.8757.221/49150或9450164.72.54:1NC50-70(41/2IF)177.8771.4213/169150或9450164.72.73:1NC50-72(41/2IF)184.271/471.4213/169150或9450169.53.12:1NC50-77196.873/471.4213/169150或9450185.32.70:1NC50-8

4、0203.2871.4213/169150或9450190.13.02:165/8REG209.681/471.4213/169150或9450195.72.93:1NC61-90228.6971.4213/169150或9450212.73.17:175/8REG241.391/276.239150或9450223.82.81:1NC70-97247.693/476.239150或9450232.62.57:1NC70-100254.01076.239150或9450237.32.81:185/8REG279.41176.23915

5、0或9450266.72.84:1机械性能(钻铤）外径OD屈服强度0.2Mpa抗拉强度bMpa伸长率4%布氏硬度HB夏比冲击功AKVJmmininch79.4-171.431/8-63/4≥758≥965≥13285-341≥54177.8-279.47-11≥689≥930螺纹连接部位应力分散槽钻铤螺纹类型内螺纹台肩面至后一牙长度±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DG+0,+0-0.79mm可替代内螺纹台肩面至力分散槽长度LRG+0-3.18mmNC358

6、2.682.15166.6782.1585.73NC38(31/2IF)88.988.11166.6789.3092.08NC44101.6101.60166.67106.36104.78NC46(4IF)101.6106.76166.67109.93104.78NC50(41/2IF)101.6117.48166.67120.65104.78NC56114.3121.84250.00134.14117.48NC61127.0132.95250.00149.25130.18NC70139.7152.00250.00171.05142.

7、8865/8REG114.3134.14166.67137.72117.4875/8REG120.7133.35250.00162.72123.8385/8REG123.8149.25250.00184.94127.00　注：NC23、26、31与23/8IF螺纹因壁薄而不带连接部位应力分散模槽公司为优化钻铤原材料供应,新采用了M公司的4145H钢材进行203mm石油钻铤的生产。第一批5支钻铤(每支尺寸:外径203mm、内径76mm、长9500mm)在工频调质热处理(喷淋水淬火)之后发现其中2支因热处理裂纹而报废。因该产品每支价值2

8、万余元,报废后损失大,该公司立即组织人员进行了分析。经分析判定,裂纹系工频热处理工艺不当造成。工艺改进后,再对M公司供应的4145H钢材其余15支进行热处理,全部合格。现就其203mm4145H钻铤热处理裂纹进行分析。