rock bits

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rock bits
Posting date : Aug 18, 2012
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11-
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MD Series Rock bits High speed motor bit Working condition of the rock bit in directional and horizontal drilling applications is quite different than in vertical well drilling .our factory’s new MD series motor bit features high RPM , Better gage protection and stability ,higher reliability, excellent hydraulic effect and longer working life etc.MD rock bit is suitable for drilling at 90~300 RPM and is the ideal choice for directional ,horizontal and horizontal multilateral well drilling applications. The size range of MD series rock bit is from 7 7/8 to 12 1/4 inch ,and IADC varies from 117 to 647. for example:8 1/2MD517X. Bit type HJT517 Applicable formation soft with low compressive strength and high drillabilty,such as soft shale ,clay and salt bed, sandstone and soft limestone ,etc. Main characteristics of the bit &Cutting Stracture Large dia,offset crested scoop compacts in inner roe wedge compacts in outer row ,high compact exposure and inequable spaced compacts arrangement. and a row of trimmers is added between gage row and heel row Normal WOB Kn/mm(bit dia) 0.35~1.05 Rotary Speed(rpm) 240~60

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