Drill Collar Lifting Subs

Drill Collar Lifting Subs

The Lifting sub is a tool for lifting down hole drilling tools such as drill collars,drill pipes etc.in oil,gas and geology field drilling operations.
The structure is devided to two types: "A" and "B". The shoulder of Type A is 18°, type B is 90°, which could be chosen according to the elevator structures. The connections should suit to the drill string which is connected to it. The lifting groove is clamped by elevator.

Specification

Normal Size（mm）

ID(mm)

Joint OD(mm)

Joint Length(mm)

Conn.

Normal Size（mm）

ID(mm)

Joint OD(mm)

Joint Length

(mm)

Conn.

73

31.8

79.4

250

NC23

127

82.6

177.8

250

NC50

44.5

88.9

NC26

184.2

89

54.0

104.8

NC31

196.8

300

NC56

50.8

120.7

NC35

203.2

68.3

127.0

NC38

127

95.3

209.6

6-5/8REG

127

71.4

152.4

NC44

228.6

NC61

158.8

241.3

7-5/8REG

82.6

158.8

NC46

247.7

NC70

165.1

254

NC70

171.5

279.4

NC77


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