Permanent Ring Bit System

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Permanent ring bit System casing drilling bits by DTH Hammer Product details: Kingdrilling Tools CO., LTD is one of the most professional private enterprise specialized in researching and producing casing drilling system,Website:http://www.mingdthbit.com, down the hole(DTH) hammer, down the hole bit, thread drill bits, taper drill bits, Anchor, coal mining tools and so on. Product feature: Permanent ring bit system is a concentric drilling system with retrievable pilot bits. This system drills in any direction and in any type of ground condition. The Symmetric components are made up of: ---A pilot bits with large internal flushing holes and external flushing grooves ---Symmetrical ring bit (reamer) with internal bayonet coupling ---Casing shoe for driving of casing. The Pilot bits is attached to any common DTH hammer shank. Model External Dia.(mm) Casing Dia.(OD*ID) Spline MK-MRING90 125 114*102 MACH33, DHD3.5 MK-MRING115 155 139*127 DHD340, SD4, QL4 MK-MRING140 188 168*153 DHD350, SD5, QL5 MK-MRING165 215 194*181 DHD360, SD6, QL6 MK-MRING190 238 219*206 DHD360, SD6, QL6 MK-MRING215 276 254*240 DHD380, SD8, QL8 MK-MRING235 293 273*254 DHD380, SD8, QL8 MK-MRING240 293 273*260 DHD380, SD8, QL8 MK-MRING280 345 323*303 SD10 MK-MRING315 375 355*335 SD10 MK-MRING365 432 406*387 N120, N125, SD12 MK-MRING460 530 508*483 N125, N180 MK-MRING510 580 559*533 N180 MK-MRING560 635 610*584 N180 MK-MRING610 695 660*632 N240 MK-MRING660 735 711*685 N240 MK-MRING710 785 762*736 N240 MK-MRING745 838 813*780 N240 MK-MRING810 886 864*838 N240, N240S MK-MRING860 935 914*884 N240S MK-MRING910 980 965*935 N240S MK-MRING960 1038 1016*986 N240S, M330 MK-MRING1010 1090 1067*1041 M330 How to order: Casing Tube OD & ID + Ring Bit Diameter + Hammer Shank + Maximal Normal Bit Diameter + Casings and Casing Shoes Installation Method (if by threads, threads standard must be offered)   Advantages： 1. Enhance penetration and perpendicularity 2. Reduce torque requirements 3. Deal with straight, oblique hole and other angle holes 4. Lowest effect with environment 5. Material:  TIMKIN Steel. Tungsten carbide: YK05, T6 from Element Six in Germany 6. Kingdrilling DTH tools are forged by advanced electron-hydraulic forging hammer, and harness process is managed by multipurpose furnace heat treatment. 7. Quality: More than 40 Years engineer to make sure the quality, 100% inspection

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WUHAN KINGDRILLING DIAMOND CO., LTD.

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