Diamond surface set bits, Surface set core bits, surface-set bits




  • Product description：Diamond surface set core bits or written as surface-set bits or surface set bits differ from impregnated bits in that they only have a single layer of natural diamonds set onto bits' working surface.
  • Diamond surface set core bits or written as surface set bits or surface-set bits differ from impregnated bits in that they only have a single layer of natural diamonds set onto the working surface of bits according to a pre-determined pattern, Its waterways are usually shallower than an impregnated bit because of the single layer of diamonds. Some bits are designed with face discharge holes to minimize core wash when drilling soft and fractured formations.
    We supply a wide range of surface set core bits, which includes a variety of profiles, diamond grades and sizes designed to provide the most efficient cutting ability in all different rock formations.
    Number of Stones is a very important factor in determining how well a big will cut. Our engineers use mathematical formulae to set each diamond on bit cutting area to ensure proper overlap with a minimum of diamonds to keep the carat weight (and initial bit cost) as low as possible in a balanced design.
    Diamond Grade is the most important factor to take into consideration when selection a bit. As it affects total meters drilled and therefore affects cost per meter drilled. It obviously also affects bit price. The diamonds we use have been selected carefully and also have been improved over the years.
    Bit Gauges:
    SIZE
    CORE DIAMETER
    HOLE DIAMETER
    (in)
    (mm)
    (in)
    (mm)
    BQ
    1.433
    36.4
    2.345
    59.6
    NQ
    1.875
    47.6
    2.965
    75.3
    HQ
    2.500
    63.5
    3.763
    95.6
    PQ
    3.345
    85.0
    4.805
    122.0
    NQ3, NQTT
    1.775
    45.1
    2.965
    75.3
    HQ3, HQTT
    2.406
    61.1
    3.763
    95.6
    PQ3, PQTT
    3.270
    83.1
    4.805
    122.0
    Diamond core drilling differs from other geological drilling, which utilizes an annular diamond drill bit attached to the end of hollow drill rods to cut a cylindrical core of solid rock for examination on the surface. The core does not drop out of the inside of the core barrel when lifted because either a split ring core lifter or basket retainer allow the core to move into, but not back out of the tube. Drilling of 1200 to 1800 metres is common and at these depths, ground is mainly hard rock,so diamond drill rigs need to drill slowly to lengthen the life of drill bits and rods, this drilling method cost are very expensive.
    Drilling Steps:
    1. To mount drill rods, bits, and core barrel etc drilling tools with a diamond drill rig.
    2. To utilize a diamond drill bit attached to the end of drill rods to cut a cylindrical core of solid rock.
    3. To retrieve the core samples to the surface by retracting the winch cable which located on the top end of the core barrel, lowered inside the rod string.
    4. To remove the core sample from the core barrel, break it into small pieces to make it fit into the sample trays and catalogue.

Comments

  1. Guizhou VilongDecember 20, 2018 at 11:40 PM

    Contact us for more details at sales@rotarypercussivedrill.com

    ReplyDelete

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