Changsha Drilling Machinery CO., LTD

 

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 different 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 efficient tool for advancing casing through overburden layers. We have two crown types of impregnated diamond casing shoes available, flat 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.

 

 




 
 
 
Type
 
Size
 
Outside diameter
 
Inside diameter

 

Standard Casing Shoes

 
Inch
 
Mm
 
Inch
 
Mm
 
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 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-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

 

Note: The above size is only for reference and non-standard set diameters and may be available on request.

 

Product Show
PW Casing Shoe
PW Casing Shoe
NW Casing Shoe
NW Casing Shoe
HW Casing Shoe
HW Casing Shoe
BW Casing Shoe
BW Casing Shoe
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