1、性能及优点：杆体管端采用内外加厚型式，最大可钻深4500米，接头螺纹采用磷化或镀钢处理；2、产品用途：井下钻井作业，延长钻头进尺；3、售后服务：可送货上门，跟踪服务；4、包装：采用钢带捆扎，隔层板压装。规格型号公称重量平端计算重量钢级壁厚加厚形式inmmLb/ftLb/ftKg/m inmm 2 3/860.36.656.269.32E,X,G, S0.287.11EU2 7/87310.49.7214.48E,X,G, S0.3629.19EU   IU3 1/288.99.58.8113.12E0.2546.45EU   IU3 1/288.913.312.3118.34E,X,G, S0.3689.35EU   IU3 1/288.915.514.6321.79E0.44911.4EU   IU3 1/288.915.514.6321.79X,G, S0.44911.4EU   IEU4101.61412.9319.26E,X,G, S0.338.38EU   IU4-1/2114.313.7512.2418.23E0.2716.88EU   IU4-1/2114.316.614.9822.31E,X,G, S0.3378.56EU   IEU4-1/2114.32018.6927.84E,X,G, S.04310.92EU   IEU512716.2514.8722.15X,G, S0.2967.52IU512719.517.9326.71E0.3629.19IEU512719.517.9326.71X,G, S0.3629.19EU  IEU512725.624.0335.79E0.512.7IEU512725.624.0335.79X,G, S0.512.7EU  IEU