Unionlever (Group) Petroleum Equipment Co.,Ltd.

Drill Collar Lifting Sub

Drill Collar Lifting Subs

Drill Collar Lift Subs are of one-piece construction and manufactured from alloy steel fully heat-treated. This heavy-duty type Drill Collar Lifting Sub is designed for use with the drill pipe elevators. The structure includes sloping shoulder and straight shoulder, which can be selected by customs. Drill Collar Lifting Subs are normally manufactured with length 1200mm long overall . However, this type sub can be made to any lengths desired. 
 

 
   

NO.

Normal Size
mm(in)

ID
d/mm

Connection
API

O.D. of Drill Pipe
mm(in)

O.D of End Elevate
mm

1

73.0(2-7/8)

31.8

NC23

79.4(3-1/8)

111.1

2

44.5

NC26

88.9(3-1/2)

3

88.9

(3-1/2)

54.0

NC31

104.8(4-1/8)

127.0

4

50.8

NC35

120.7(4-3/4)

5

68.3

NC38

127.0(5)

6

127.0(5)

71.4

NC44

152.4(6)

168.3

7

158.9(6-1/4)

8

 

NC46

158.9(6-1/4)

9

82.6

165.1(6-1/2)

10

 

171.5(6-3/4)

11

 

NC50

177.8(7)

12

 

184.2(7-1/4)

13

 

NC56

196.8(7-3/4)

14

 

203.2(8)

15

95.3

6-5/8REG

209.6(8-1/4)

16

 

NC61

228.6(9)

17

 

7-5/8REG

241.3(9-1/2)

18

 

NC70

247.7(9-3/4)

19

 

254.0(10)

20

 

NC77

279.4(11)

 
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