键槽扩大器键槽扩大器是***键槽，预防键槽卡钻的专用工具。分为滑套式键槽扩大器和固定式键槽扩大器，该工具连接于钻铤上方。其滑套表面堆焊有多条硬质合金切削棱带，能有效地扩大键槽部位的尺寸。KeywayReamerKeyseatreamerisaspecializedtooltodestroykeyseatandpreventbeingisdividedintoslidingsleevetypeandfixedisconnectedonthetopofdrillcollar.weldingmanycarbide-cuttingridgesonitsslidingsleevesurface,whichcanreamthekeyseateffectively.键槽扩大器技术参数SpecificationofKeywayReamer型号Type钻头直径BitDiameter(in)钻铤直径DrillCollarDiameter(in)***大外径MaxExternalDiameter(mm)水眼直径Water-holeDiameter(mm)螺纹代号Connection总长OAL(mm)***大工作压力Max.WorkingPressure(Kn)上端内螺纹UppernternalThread下端外螺纹LowerExternalThreadJKQ152.46″43/4″13638NC38(31/2″IF)NC38(31/2″IF)22501400JKQ152.46″43/4″13638NC38(31/2″IF)NC38(31/2″IF)22501400JKQ215.981/2″61/4″17057NC50(41/2″IF)NC50(41/2″IF)25502300JKQ215.981/2″7″18770NC50(41/2″IF)51/2″FH25502900JKQ241.391/2″7″21270NC50(41/2″IF)51/2″FH25502900JKQ241.391/2″7″2127051/2″FH65/8″REG25504900JKQ311.15121/2″7″2457051/2″FH65/8″REG25504900)