滚子方补芯
滚子方补芯滚子方补芯是一种常用的井口工具。适用于171/2″-491/2″的转盘。RollerKellyBushingRollerKellyBushingisoneofcommonwellheadtools.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LargeEnd31/288.9406356332φ3321:341/4107.9551/4133.35SpecificationofRollerKellyBushing)