滚子方补芯滚轮方补心为石油钻井必备工具，与转盘瓦相配，驱动方钻杆，该产品通过四个滚子转动减少与方钻杆的摩擦，延长其寿命。对于四方和六方不同规格的方钻杆，可以通过更换滚子与之配合，与各类转盘连接，有四方转动和销轴转动二种驱动形式。该设备结构简单，安装方便，安全性能好，不易损伤方钻杆。适用于171/2”-491/2”的转盘。RollerKellyBushingRollerKellyBushingisanessentialpetroleumdrillingtool,andcanbeequippedwithrotaryslips,soastodriveKellybar.TheproductreducesitsfrictionwithKellybarbytherollingoffourrollersinordertoprolongitslife.Theproductcanalsofittofour-sidedorsix-sidedKellybarbychargingroller,andthenconnectitwithvariousrotarytables,withtwodrivemethods,namely,squarerollingandpinshaftrolling.TheRollerKellyBushingissimpleinoperation,convenientininstallationandperfectinsafetyperformance.Itcanbeappliedtorotarytablefrom171/2”to491/2”.滚子方补心技术参数方钻杆尺寸KellySize高度(mm)Elevation底座(mm)BedplateSize锥度Taperinginmm上部Top下部Lower对边OppositeSide大端LargeEnd31/288.9406356332φ3321：341/4107.9551/4133.35)