High-Performance Diamond Core Drill Bits for Casing Tube
Advancement
High-Performance Diamond Core Drill Bits for Casing Tube Protection
High-Performance Diamond Core Drill Bits for Casing Tube Handling
Professional Diamond Casing Shoe for Casing Tube Distortion
Protection
Surface Set Diamond Casing Shoe for Soft and Abrasive Formations
Casing Shoe
The casing shoe bit is mainly used in handling casing tube in the
shallow earth surfaces, and we have casing shoes bit in diferent
hardness to better fit various
casing tube bits
The casing shoe diamond bit is mainly made up of diamond single
crystal steel body, tungsten carbide and polycrystalline diamond
Main functions of casing shoe:
1): protect casing ends from distortion.
2): help casing pass through stratum to bed rock.
3): carry mud to earth surface.
4): help down-pass of casing when drill rod is in hole .
Impregnated diamond casing shoe is the most commonly used as it has
the widest range of application and is generally the most eficient
tool for advancing casing through overburden layers. We have two
crown types of impregnated diamond casing shoes avilable, fat and
V-ring.
Impregnated diamond casing shoe is the most commonly used as it has
the widest range of application and is
generally the most efficient tool for advancing casing through
overburden layers. We have two crown types of
impregnated diamond casing shoes available, flat and V-ring.
Surface set diamond casing shoe differs from the impregnated type
in that they are set with a single layer of
natural drill diamond in a pre -determined pattern on the working
surfaces of the tool. Surface set diamond casing
shoes are recommended for use when drilling relatively soft and
abrasive formations such as sandstone or
limestone.
Tungsten-Carbide casing shoe set with large tungsten-carbide
elements that are physically embedded into the
crown of the tool. Tungsten-carbide does not possess the hardness
of diamond but it is very cost effective
means of drilling through softer unconsolidated formations. The
application of this type of casing shoe is
primarily in geotechnical soil investigation or for advancing
casing tubes through overburden layers that are
composed mainly of clay, sand, gypsum or soft shale.
| Casing Bit Specifications |
|
| Type | Size | Outside Diameter | Inside Diameter |
| inch | mm | inch | mm |
| Standard Casing Shoes | RW | 1.475 ~ 1.465 | 37.46 ~ 37.21 | 1.188 ~ 1.183 | 30.18 ~ 30.05 |
| EW | 1.1880 ~ 1.870 | 47.75 ~ 47.50 | 1.497 ~ 1.492 | 38.02 ~ 37.90 |
| AW | 2.350 ~ 2.340 | 59.69 ~ 59.44 | 1.902 ~ 1.897 | 48.31 ~ 48.18 |
| BW | 2.970 ~ 2.960 | 75.44 ~ 75.19 | 2.377 ~ 2.367 | 60.38 ~ 60.12 |
| NW | 3.620 ~ 3.610 | 91.95 ~ 91.70 | 2.997 ~ 2.987 | 76.12 ~ 75.87 |
| HW-CDDA | 4.632 ~ 4.617 | 117.65 ~ 117.27 | 3.930 ~ 3.920 | 99.82 ~ 99.57 |
| HW-DCDDA | 4.632 ~ 4.617 | 117.65 ~ 117.27 | 3.980 ~ 3.970 | 101.09 ~ 100.84 |
| HWT | 4.632 ~ 4.617 | 117.65 ~ 117.27 | 3.930 ~ 3.920 | 99.82 ~ 99.57 |
| PW | 5.660 ~ 5.640 | 143.76 ~ 143.26 | 4.865 ~ 4.850 | 123.57 ~ 123.19 |
| PWT | 5.660 ~ 5.640 | 143.76 ~ 143.26 | 4.865 ~ 4.850 | 123.57 ~ 123.19 |
| SW | 6.800 ~ 6.780 | 172.72 ~ 172.21 | 5.948 ~ 5.933 | 151.08 ~ 150.70 |
| UW | 7.815 ~ 7.785 | 198.50 ~ 197.74 | 6.916 ~ 6.896 | 175.67 ~ 175.16 |
| ZW | 8.825 ~ 8.795 | 224.15 ~ 223.40 | 7.987 ~ 7.967 | 202.87 ~ 202.36 |
| Metric Casing Shoes | 46 mm | 1.818 ~ 1.808 | 46.18 ~ 45.92 | 1.462 ~ 1.452 | 37.13 ~ 36.88 |
| 56 mm | 2.210 ~ 2.200 | 56.13 ~ 55.88 | 1.855 ~ 1.845 | 47.12 ~ 46.87 |
| 66 mm | 2.603 ~ 2.593 | 66.12 ~ 65.87 | 2.249 ~ 2.239 | 57.12 ~ 56.87 |
| 76 mm | 2.997 ~ 2.987 | 76.12 ~ 75.87 | 2.643 ~ 2.633 | 67.13 ~ 66.88 |
| 86 mm | 3.391 ~ 3.381 | 86.13 ~ 85.88 | 3.037 ~ 3.027 | 75.14 ~ 76.89 |
| 101 mm | 3.985 ~ 3.970 | 101.22 ~ 100.84 | 3.460 ~ 3.445 | 87.88 ~ 87.50 |
| 116 mm | 4.575 ~ 4.560 | 116.20 ~ 115.82 | 4.063 ~ 4.048 | 103.20 ~ 102.82 |
| 131 mm | 5.165 ~ 5.150 | 131.19 ~ 130.81 | 4.700 ~ 4.685 | 119.38 ~ 119.00 |
| 146 mm | 5.755 ~ 5.740 | 146.18 ~ 145.80 | 5.244 ~ 5.229 | 133.20 ~ 131.81 |
| Standard Casing Shoes (For use with DCDMA and CDDA Standard Casing) | BW | 2.970 ~ 2.960 | 75.44 ~ 75.19 | 2.220 ~ 2.210 | 56.39 ~ 56.13 |
| NW | 3.620 ~ 3.610 | 91.95 ~ 91.70 | 2.845 ~ 2.835 | 72.26 ~ 72.00 |
| HW | 4.632 ~ 4.617 | 117.65 ~ 117.27 | 3.782 ~ 3.772 | 96.06 ~ 95.81 |
| Wide-Kert Casing Bits (For use with DCDMA and CDDA Standard Casing) | BW (BWL) | 2.970 ~ 2.960 | 75.44 ~ 75.19 | 1.880 ~ 1.870 | 47.75 ~ 47.50 |
| NW (NWL) | 3.770 ~ 3.755 | 95.76 ~ 95.38 | 2.505 ~ 2.495 | 63.63 ~ 63.38 |
| HW (HWL) | 4.815 ~ 4.795 | 122.30 ~ 121.80 | 3.350 ~ 3.340 | 85.09 ~ 84.84 |
British Standard BS879
Water Well Casing Shoes | 4 inch | 4.635 ~ 4.615 | 117.73 ~ 117.22 | 3.824 ~ 3.809 | 97.13 ~ 96.75 |
| 5 inch | 5.660 ~ 5.640 | 143.76 ~ 143.26 | 4.833 ~ 4.813 | 122.75 ~ 122.25 |
| 6 inch | 6.800 ~ 6.780 | 172.72 ~ 172.21 | 5.833 ~ 5.818 | 148.15 ~ 147.75 |
| 8 inch | 8.835 ~ 8.815 | 224.41 ~ 223.90 | 7.835 ~ 7.815 | 199.01 ~ 198.50 |
| 10 inch | 10.940 ~ 10.920 | 277.88 ~ 277.37 | 9.825 ~ 9.805 | 249.56 ~ 249.05 |
| Note: The above size is only for reference and non standard set
diameters and maybe available on request. |
