Impregnated and Surface diamond casing shoe
Product Description
Impregnated diamond casing shoe and Surface set diamond casing shoe
Casing shoe is used on the leading edge of a casing tube string to advance it through the overburden layer and into the bedrock by means of rotational drilling. Our standard design is Impregnated diamond casing shoe, which is the most commonly used due to its’ widest range of application and is generally the most efficient tool for advancing casing through overburden layers.
Main functions of diamond 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.
Tungsten-Carbide casing shoe
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.
Impregnated diamond casing shoe
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
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.
| 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 | 1.880~1.870 | 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-DCDMA | 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 | 46mm | 1.818~1.808 | 46.18~45.92 | 1.462~1.452 | 37.13~36.88 |
| 56mm | 2.210~2.200 | 56.13~55.88 | 1.855~1.845 | 47.12~46.87 | |
| 66mm | 2.603~2.593 | 66.12~65.87 | 2.249~2.239 | 57.12~56.87 | |
| 76mm | 2.997~2.987 | 76.12~75.87 | 2.643~2.633 | 67.13~66.88 | |
| 86mm | 3.391~3.381 | 86.13~85.88 | 3.037~3.027 | 75.14~76.89 | |
| 101mm | 3.985~3.970 | 101.22~100.84 | 3.460~3.445 | 87.88~87.50 | |
| 116mm | 4.575~4.560 | 116.20~115.82 | 4.063~4.048 | 103.20~102.82 | |
| 131mm | 5.165~5.150 | 131.19~130.81 | 4.700~4.685 | 119.38~119.00 | |
| 146mm | 5.755~5.740 | 146.18~145.80 | 5.244~5.229 | 133.20~132.81 | |
| Standard Casing Shoes (For use with DCDMA and CDDAWide-Kerf Casing Bits | 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-Kerf Casing Bits (For use with DCDMA and CDDA Standard Casing) | BW (NWL) | 2.970~2.960 | 75.44~75.19 | 1.880~1.870 | 47.75~47.50 |
| NW (HWL) | 3.770~3.755 | 95.76~95.38 | 2.505~2.495 | 63.63~63.38 | |
| HW (PWL) | 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 | |