Spiral Drill Collar With Elevator Groove And Slip Groove

The short drill collar produced by our company is made of special alloy steel and is accordant with mechanical property of drill collars. Besides, the connection of the drill collar is accordant with API. It is mainly used for connecting special tools or composing drill tools........,

Normal Size Specification
mm(in)

O.D.
in
(mm) 

Connection
API

Length Series
ft-in
(mm)

4-1/8 (105)

2
(50)

3,6,9,12,15,18,21,24,27
(915,1,830,2,743,3,660,4,575,5,490,6,405,7,320,8,235)

4-3/4 (121)

2
(50)

NC35

5 (127)

2-1/4
(57)

NC38

6-1/4 (159)

2-13/16
(71)

NC46

6-1/2 (165)

2-13/16
(71)

NC46

7 (178)

2-13/16
(71)

NC50

8203

2-13/16
(71)

NC56

9229

2-13/16
(71)

NC61

 According to customer requirements,we can design and manufacture other serial specification products....