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Drill Collar

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Specifications

 

        Specification

       OD             mm (in)

           ID                 mm (in)

          Length        M (ft)

 Bevel Diameter        mm

Bending Strength    Ratio

NC23-31

79.4(3 1/8)

31.8(1 1/4)

9.14(30)

76.2

2.57:1

NC26-35

88.9(3 1/2)

38.1(1-1/2)

9.14(30)

82.9

2.42:1

NC31-41

104.8(4 1/8)

50.8(2)

9.14or9.45(30or31)

100.4

2.43:1

NC35-47

120.6(4 3/4)

50.8(2)

9.14or9.45(30or31)

114.7

2.58:1

NC34-50

127.0(5)

57.2(2-1/4)

9.14or9.45(30or31)

121

2.38:1

NC44-60

152.4(6)

57.2(2-1/4)

9.14or9.45(30or31)

144.5

2.49:1

NC44-60

152.4(6)

71.4(2-13/16)

9.14or9.45(30or31)

144.5

2.84:1

NC44-62

158.8(6 1/4)

57.2(2-1/4)

9.14or9.45(30or31)

149.2

2.91:1

NC46-62

158.8(6 1/4)

71.4(2-13/16)

9.14or9.45(30or31)

150

2.63:1

NC46-65

165.1(6 1/2)

57.2(2-1/4)

9.14or9.45(30or31)

154.8

2.76:1

NC46-65

165.1(6 1/2)

71.4(2-13/16)

9.14or9.45(30or31)

154.8

3.05:1

NC46-67

171.4(6 3/4)

57.2(2-1/4)

9.14or9.45(30or31)

159.5

3.18:1

NC50-70

177.8(7)

57.2(2-1/4)

9.14or9.45(30or31)

164.7

2.54:1

NC50-70

177.8(7)

71.4(2-13/16)

9.14or9.45(30or31)

164.7

2.73:1

NC50-72

184.2(7 1/4)

71.4(2-13/16)

9.14or9.45(30or31)

169.5

3.12:1

 

 
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