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    1. 

    The main crown technical parameters of impregnated diamond core bits include diamond grade, size, concentrarion and quality, matrix hardness and crown shapes. The users can make rational selections according to the formations to be drilled.

    To avoid exessive bit wear, tungsten carbide inserts are used on both sides on the waterway, and gage stones are a bit larger.

    2.

     Suface Set Diamond Core Bits can be used with any type of core barrels .By varying the diamond grade, size, quality,and matrix hardness and crown shapes, the users can satisfactorily drill and core hard and homeogeneous formations. To avoid excessive matrix wear at the leading edge of each segment. tungsten carbde inserts are fitted on each side of rhe waterway. This kind of bits cannot be used in broken or loose formations.

    ITEM

    DIAMOND BIT

    REAMING SHELL

    "Q" Series Wireline

    Size

    Bit-set OD

    Bit-set ID

    mm

    inch

    mm

    inch

    mm

    inch

    AQ

    47.60

    1.88

    26.97

    1.06

    48.00

    1.89

    BQ

    59.50

    2.35

    36.40

    1.43

    59.90

    2.36

    NQ

    75.30

    2.97

    47.60

    1.88

    75.70

    2.98

    HQ

    95.58

    3.77

    63.50

    2.50

    96.00

    3.78

    PQ

    122.00

    4.80

    84.96

    3.35

    122.60

    4.83

    Swedish Metric T2 Series

    36

    36.0

    1.417

    22.0

    0.866

    36.3

    1.429

    46

    46.0

    1.811

    32.0

    1.260

    46.3

    1.823

    56

    56.0

    2.205

    42.0

    1.654

    56.3

    2.217

    66

    66.0

    2.598

    52.0

    2.047

    66.3

    2.610

    76

    76.0

    2.992

    62.0

    2.441

    76.3

    3.004

    86

    86.0

    3.386

    72.0

    2.835

    86.3

    3.398

    101

    101.0

    3.976

    84.0

    3.307

    101.3

    3.988

    Swedish T Series

    TAW

    47.6

    1.875

    23.2

    1.31

    48.0

    1.89

    TBW

    59.5

    2.345

    44.9

    1.77

    59.9

    2.36

    TNW

    75.3

    2.965

    60.5

    2.38

    75.7

    2.98




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