钻铤尺寸、扣型

1.普通钻铤示意图2.机械性能钻铤尺寸最小屈服强度MPa最小位伸强度MPa布式硬度HB79-175758965285-341176-280689930285-3413.常用数据内径d(mm)长度L(m)79.431/8″31.89.1588.931/2″38.19.15104.841/8″50.89.15120.743/4″50.89.151275″57.29.15152.46″57.29.15152.46″71.49.15158.861/4″57.29.15158.861/4″71.49.15165.161/2″57.29.15165.161/2″71.49.15171.463/4″57.29.15171.463/4″71.49.15177.87″57.29.15177.87″71.49.15184.271/4″71.49.15196.873/4″71.49.15203.28″71.49.15209.681/4″71.49.15228.69″71.49.15241.391/2″76.29.15247.693/4″76.29.1525410″76.29.15279.411″76.29.154.钻铤标记钻铤代号接头螺纹外径/25.4mmA型(圆柱型)ZT普通钻铤外径DNC50英吋B型(螺旋型)LTⅠ或LTⅡC型(无磁型)WTNC50英吋公称重量(kg/m)计算重量(kg/m)扣型台阶倒角直径DF(mm)32.832.63NC23-3176.240.239.782A11*2A1082.952.151.80211*210100.474.573.91NC35-47(311*310)114.77979.27311*310121123.7123.02NC44-60144.5111.8111.76NC44-60144.5135.6135.30NC46-62(4A11*4A10)149.2111.8124.04NC46-62(4A11*4A10)150147.5147.88NC46-65(4A11*4A10)154.8136.5136.63NC46-65(4A11*4A10)154.8160.9160.95NC46-67(4A11*4A10)159.5148.5149.70NC50-67(411*410)159.5174.3174.73411*410164.7163.9163.47411*410164.7177.3177.76NC50-72(411*410)169.5207.1207.36NC56-77185.3223.5223.14NC56-80(631*630)190.1238.4239.43631*630195.7290.6290.76NC61-90212.7321.8323.18731*730223.8341.2342.17NC70-97232.6362361.97NC70-100237.3444.5445.50831*830266.7普通钻铤普通钻铤1.螺旋钻铤螺旋钻铤是在圆钻铤外圆柱面上加工出三条右旋螺旋槽.距离外螺纹305-560mm,内螺纹457-610mm不加工螺旋槽.在定向钻井中,因井斜较大,螺旋钻铤与井壁接触面积小,减小了粘吸卡钻的危险.特点:BⅠ型3个螺旋槽,右旋,均布2.无磁钻铤mmin79.4-171.431/8″-63/4″≥758177.8-279.431/8″-63/4″≥6893.方钻铤特点:比同尺寸的圆钻铤刚度大,有较长的棱边与井壁接触,能连续扶正钻头和支撑井壁,减慢井斜角变化的好工具.钻具组合①单方钻铤:钻头+牙辊扩大器+方钻铤1根+扶正器+常用钻铤②双方钻铤:钻头+牙辊扩大器+方钻铤1根+扶正器(或牙辊扩大器)+方钻铤1根+扶正器+常用钻铤③悬杆方钻铤组合:钻头+大尺寸钻铤1根+方钻铤1,2根+扶正器(或牙辊扩大器)+常用钻铤4.偏重钻铤特种钻铤外径范围机械性能屈服强度σ0.2/MPa螺旋钻铤是在圆钻铤外圆柱面上加工出三条右旋螺旋槽.距离外螺纹305-560mm,内螺纹457-610mm不加工螺旋槽.在定向钻井中,因井斜较大,螺旋钻铤与井壁接触面积小,减小了粘吸卡钻的危险.特点:①BⅡ型3个螺旋槽,右旋,均布②钻铤外轮廓曲线方程:ρ=R-e(1-cos3θ)ρ--极径θ--极角≥827≥758特点:比同尺寸的圆钻铤刚度大,有较长的棱边与井壁接触,能连续扶正钻头和支撑井壁,减慢井斜角变化的好工具.②双方钻铤:钻头+牙辊扩大器+方钻铤1根+扶正器(或牙辊扩大器)+方钻铤1根+扶正器+常用钻铤③悬杆方钻铤组合:钻头+大尺寸钻铤1根+方钻铤1,2根+扶正器(或牙辊扩大器)+常用钻铤特种钻铤机械性能抗位强度σb/MPa特点:①BⅡ型3个螺旋槽,右旋,均布②钻铤外轮廓曲线方程:ρ=R-e(1-cos3θ)R--半径e--系数