Core bit & Reaming shell

1. Synthetic diamond core bits

Diamond core bits are widely used in the fields of geological exploration, engineering-oriented, hydroelectric and building engineering. Diamond drill bit series include the bits of different structures (Single tube bit, Double tube bit and wire line coring bit, etc.) and of various bit standards (domestic and foreign standards.).  

Diamond reaming shell is used together with diamond drill bits, maintaining the hole size and improving drilling stability. Forsun can provide electroplated diamond reaming shell and polycrystalline reaming shell.

                                       General Bits Applications Overlap

SITE FORMATION  

 BIT MATRIX

Hardness

Rock Type

Black

 Red

Silver

 Blue Yellow Gold Green

Pale Green

Soft

 Broken & Backfill Stratum

　




　

　

　

　

 　

　



　

　

　

　















Clay
Soft Sandstone
Shale
 Medium
    Hard  		 Limestone
Reinforced Concrete
Dolomite
Porphyry
Andesite
Graniton
   Hard Basalt
Diorite
Diorite Granite
Gneiss
  Uper
   Hard		 Granite
Bhyolite
Quartz
Fire Stone

  BLACK: Broken and loose backfill stratum formations, iron.
   RED: Broken fractures coarser-grained medium-hard and abrasion formations.
   SILVER: Slight weathering of medium-hard and hard formations.
   BLUE: Coarser grained medium-hard and abrasive formations.
   YELLOW: Get wick from concrete, medium-grain of abrasive and medium-hard to hard formations.
   GOLD: Hard, very hard and line-grained formations.
   GREEN: Medium-hard to hard, line-grained formations.
   PALE GREEN: Hard to upper-hard, line-grained formations.

2. Synthetic diamond  Masonry bits Series

Masonry bits are widely used in drilling hole in reinforced concrete wall and floorslab to lay water pipe, heating radiator pipe, gas pipe and sewer.

Specifications of masonry bit series                                                                                                  mm

size Nominal O. D. 20 26 32 38 45 52 57 63 76
Standard length 250 250 320 320 320 320 320 320 320

                                                                                                                                                                         mm

size Nominal O. D. 82 88 102 108 116 126 132 159 175 200
Standard length 320 320 320 320 320 320 320 320 320 400

Description of synthetic diamond mining bits and reaming shells

Bit

 Kind Description
Double barrel bit Surface set φ28,φ36,φ46,φ59φ60,φ66,φ75,φ76,φ91,φ94,φ110
Impregnated
Single barrel bit

Surface set

 φ36,φ46,φ59, φ75, φ91,φ94,φ110,φ130,φ150,φ170,φ200
Impregnated
Wireline core bit Surface set φ46,φ47,φ59,φ60, φ75,φ91
Impregnated
Special shape bits  　

Reaming shell

  Double barrel reaming shell φ28,φ36,φ46,φ47,φ59,φ60,φ66,φ75,φ91,φ94,φ110
Single barrel reaming shell φ36,φ46,φ47,φ59,φ60,φ75, φ91,φ94,φ110,φ130,φ150,φ170,φ200
Wireline barrel reaming shell φ46,φ47,φ59,φ60, φ75,φ91

Standard diamond set dimensions for DZ bits and Reaming shells

Size Set Bit Dimensions Reaming Shell Dimensions
              O. D.      mm               I. D.      mm              O. D.       mm               I. D.      mm
28 28 17 28.5 21.5
36 36.5 21.5 37 27.5
46 46.5 29 47 36.5
59 59.5 41.5 60 49
75 75 54.5 75.5 64
S 75 WL 75 49 75.5 62
91 91 68 91.5 79
S 91 WL 91 62 91.5 76


Craelius metric standard

 Hole size
     mm

Number of waterways Diamy    Diaborit

     Coring bit type  I. D. mm=core  
     TT           T2            B           K3		 Reaming shells
       O. D.    mm

    Casing shoe bits
  O. D. mm    I. D. mm
36

 2               4

       ---           22           22           --- 36.3

     ---                  ---
46 3               6     35.6         32           32           ---  46.3 46               36.5
56 4                8     45.5         42           42           --- 56.3 56                46.5
66 5              10      ---            52           52          38 66.3 66                56.5
76 6              12      ---            62           62          48 76.3 76                66.5
86 7              12      ---            72           72          58 86.3 86                76.5
101 8              14      ---            84           87          72 101.3 101              86.5
116 9              10      ---            ---          102          86 116.3 116            101.5
131 10             10      ---            ---          117         101 131.3 131           116.5
146 11             10      ---            ---          132         116 146.3 146           131.5

Casing shoe bits, casing bits and casing reamers same for DCDMA and CDDA

Hole Size

 Casing shoe bits Casing reamers Casing bits

         O. D.                                I. D.
    in.             mm               in.              mm


in.           mm

         O. D.                          I. D.
    in.           mm             in.          mm
XRT   1.48           37.7            1.19           30.2      ---             ---   1.48         37.7          1.00      25.4
EX   1.87           47.6            1.50           38.0    1.89          48.0   1.87         47.6          1.40      35.6
AX   2.34           59.5            1.90           48.3    2.36          59.9   2.34         59.5          1.78      45.2
BX   2.96           75.3            2.37           60.2    2.98          75.6   2.96         75.3          2.21      56.2
NX   3.61           91.8            2.99           76.0    3.63          92.2   3.61          91.8         2.84      72.1
HX   4.62          117.4           3.92           99.7      ---             ---   4.62         117.4        3.77      95.9

D.C.D.M.A Standard

Size Diamond core bits Reaming shells
Nominal Core Diameter Nominal Hole Diameter Set Dimensions + - 0.005 Set Dimensions + - 0.005
 in.                mm in.               mm O. D.              I. D. O. D.              mm
RW 3/4               19.0     1-1/8           28.5 1.160            0.735 1.175            29.8
*XRP 7/8                21.2   1-5/16           33.3 1.295            0.875 1.310            33.2
EX-EWG 7/8                21.2     1-1/2           37.7 1.470            0.845 1.485            37.7
EXM-EWM 7/8               21.2     1-1/2           37.7 1.470            0.845 1.485            37.7
AX-AWG

  1-1/8               30.0

     1-7/8           48.0 1.875            1.185 1.890            48.0
AXM-AWM   1-1/8               30.0     1-7/8           48.0 1.875            1.185 1.890           48.0
BX-BWG   1-5/8               42.0     2-3/8           59.9 2.345            1.655 2.360           59.9
BXM-BWM   1-5/8               42.0     2-3/8           59.9 2.345            1.655 2.360           59.9
NX-NWG   2-1/8               54.7            3           75.7 2.965            2.155 2.980           75.7
NXM-NWM   2-1/8               54.7            3           75.7 2.965            2.155 2.980           75.7
HX-HWG

         3               76.2

      3-7/8          98.8 3.890            3.000  3.907           99.2
2-3/4"×3-7/8"

  2-3/4               68.3

      3-7/8          98.8 3.840            2.690 3.875            98.4
4"×5-1/2"         4             100.8      5-1/2        139.6 5.435            3.970 5.495          139.6
6"×7-3/4"          6             151.6      7-3/4        196.8 7.655             5.970 7.750          196.9

*Optoional Sizes

"Q" Wire line bits sizes

Size Nominal Hole Diameter Nominal Core Diameter Std. Set-O. D. Dimen. Rm.Shi. Ste-O. D. Dimen. Set-I. D. Dimen.
  Inches      mm   Inches        mm

In. ( Approx )  

In. ( Approx )

In. ( Approx )  

AQ  1-57/64    48.0  1-1/16        27.0 1.875 1.890 1.062
BQ  2-23/64    60.0  1-7/16        36.5 2.345 2.360 1.437
NQ  2-63/64    75.8  1-7/8          47.6 2.965 2.980 1.875
HQ  3-25/32    96.0  2-1/2          63.5 3.766 3.782 2.500
PQ  4-53/64  122.6  3-11/32      85.0 4.805 4.827 3.343

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