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Twist drill bits are available in standard lengths, referred to as Stub-length or Screw-Machine-length (short), the extremely common Jobber-length (medium), and Taper-length or Long-Series (long). Most drill bits for consumer use have straight shanks. For heavy duty drilling in industry, bits with tapered shanks are sometimes used. Other types ...
Counterbore Drill Bits – a drill bit used to enlarge existing holes; Countersink Drill Bits – a drill bit to create a wide opening for a screw; High-Speed Drill Bits – these are drill bits made to be very strong and therefore are often used to cut metals; Spade drill Bits – spade-shaped drill bits used primarily to bore holes in softwoods
In this instance the drill collars provide the necessary weight on the bit. Type 2 uses heavy weight drill pipe as a transition between the drill collars and the drill pipe. Weight on bit is achieved by the drill collars. Type 3 uses the drill collars to achieve directional control. The heavy weight drill pipe applies the weight on the bit.
A hammer drill has a specially designed clutch that allows it to not only spin the drill bit, but also to punch it in and out (along the axis of the bit). The actual distance the bit travels in and out and the force of its blow are both very small, and the hammering action is very rapid—thousands of "BPM" (blows per minute) [17] or "IPM ...
Drill cuttings [1] are broken bits of solid material removed from a borehole drilled by rotary, percussion, or auger methods and brought to the surface in the drilling mud. Boreholes drilled in this way include oil or gas wells , water wells , and holes drilled for geotechnical investigations or mineral exploration.
Advanced Vector Extensions (AVX, also known as Gesher New Instructions and then Sandy Bridge New Instructions) are SIMD extensions to the x86 instruction set architecture for microprocessors from Intel and Advanced Micro Devices (AMD).