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Changsha Drilling Machinery CO., LTD
Changsha Drilling Machinery CO., LTD
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8 Years

Changsha Drilling Machinery CO., LTD

Casing Bits

Place of Origin : China

Brand Name : Drilling King

Model Number : BW, NW, HW, PW

Certification : ISO, SGS

Price : Negotiated

Packaging Details : Carton

Delivery Time : One week

Payment Terms : T/T, Western Union

Supply Ability : 3000 pcs per month

MOQ : 1

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Casing Bits

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.


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