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Drill Collar

MED is a drill collar, non-magnetic drill collar, drill collar sub, drill collar manufacturer from China.
Introduction
Drill collar is used in the drilling of oil wells for weighting drill bit, enabling it to drill through rock. It is a bar made of solid steel, either plain carbon steel or non-magnetic steel alloy, drilled lengthwise to permit the passage of drilling fluids. Drill collar is the lowest element of a drill string, which encompasses all the elements of a downhole process from surface to rock bit.
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drill collar
drill collar
drill collar
drill collar
drill collar
drill collar
Specification
 

Type

OD(mm)

ID(mm)

L(m) ±152.4mm d

DF(mm)    ±0.4

NC23-31

79.4

31.8

9.14

76.2

NC26-35

88.9

38.1

9.14

82.9

NC31-41

104.8

50.8

9.14or9.45

100.4

NC35-47

120.6

50.8

9.14or9.45

114.7

NC38-50

127

57.2

9.14or9.45

121

NC44-60

152.4

57.2

9.14or9.45

144.5

NC44-60

152.4

71.4

9.14or9.45

144.5

NC46-62

158.8

57.2

9.14or9.45

149.2

NC46-62

158.8

71.4

9.14or9.45

150

NC46-65

165.1

57.2

9.14or9.45

154.8

NC46-65

165.1

71.4

9.14or9.45

154.8

NC46-67

171.4

57.2

9.14or9.45

159.5

NC50-70

177.8

57.2

9.14or9.45

164.7

NC50-70

177.8

71.4

9.14or9.45

164.7

NC50-72

184.2

71.4

9.14or9.45

169.5

NC56-77

196.8

71.4

9.14or9.45

185.3

NC56-80

203.2

71.4

9.14or9.45

190.1

6-5/8REG

209.6

71.4

9.14or9.45

195.6

NC61-90

228.6

71.4

9.14or9.45

212.7

7-5/8REG

241.3

76.2

9.14or9.45

223.8

NC70-97

247.6

76.2

9.14or9.45

232.6

NC70-100

254

76.2

9.14or9.45

237.3

8-5/8REG

279.4

76.2

9.14or9.45

266.7

NC50-67

171.5

71.4

9.14or9.45

159.5


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