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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.

Quantity:
  • PQ PW BW NW HWT
  • ROSCHEN
  • ROS-DCS-PQ PW BW NW HWT

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.

different type casing shoe

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

casing shoe PQ

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