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Polycrystalline diamond percussion drill bits using low thrust and torque for application with small diameter drill bits
Polycrystalline diamond percussion drill bits using low thrust and torque for application with small diameter drill bits
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机译：低推力和扭矩的多晶金刚石冲击钻头，适用于小直径钻头
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摘要
A polycrystalline diamond drill bit for percussion drilling, in small holes in high silica ground. The bits are made having a bit body, and a series of insets locating in the bit body, and the bits are made using a double chisel design, or a modified double chisel design. The inserts are set into the bit body at very specific angles. The inserts have specific lengths to provide cut clearance for the bit body. The cutting angle the and radius on the tip of each insert in addition to the diameter of the inserts, provide a machine thrust pressure and machine torque pressure at low ranges when the PCD bits are used in percussion drilling.
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