●API Square Kelly,Product Schematic Diagram.
Kelly is the driven part of the whole drill string.
Kelly is divided into Square Kelly and Hexagonal Kelly. WOLFNI Kelly all conform to API Spec7-1.
The length of Kelly extends from 11meters, 12meters,16meters,and to the longest 27 meters.(connected with tool joint of high torsion resistance)
|
API Square Kelly
|
|
Size
(in)
|
Length
(ft)
|
Standard
or
optional
|
Top Connection
|
Bottom Connection
|
Across Corners
|
ID
(in)
|
Weight (kg)
|
|
Connection
|
OD
(in)
|
Connection
|
OD
(in)
|
DC
mm
|
2 1/2"
|
40
|
Standard
|
6 5/8REG
|
7 3/4
|
NC26
|
3 3/8
|
83.3
|
1 1/4
|
389
|
|
40
|
Optional
|
4 1/2REG
|
5 3/4
|
NC26
|
3 3/8
|
83.3
|
1 1/4
|
349
|
3"
|
40
|
Standard
|
6 5/8REG
|
7 3/4
|
NC31
|
4 1/8
|
100.0
|
1 3/4
|
466
|
|
40
|
Optional
|
4 1/2REG
|
5 3/4
|
NC31
|
4 1/8
|
100.0
|
1 3/4
|
436
|
3 1/2"
|
40
|
Standard
|
6 5/8REG
|
7 3/4
|
NC38
|
4 3/4
|
115.1
|
2 1/4
|
560
|
|
40
|
Optional
|
4 1/2REG
|
5 3/4
|
NC38
|
4 3/4
|
115.1
|
2 1/4
|
532
|
|
4 1/4"
|
40
|
Standard
|
6 5/8REG
|
7 3/4
|
NC46
|
6 1/4
|
141.3
|
2 13/16
|
792
|
|
40
|
Optional
|
4 1/2REG
|
5 3/4
|
NC46
|
6 1/4
|
141.3
|
2 13/16
|
756
|
4 1/4"
|
40
|
Standard
|
6 5/8REG
|
7 3/4
|
NC50
|
6 3/8
|
141.3
|
2 13/16
|
793
|
|
40
|
Optional
|
4 1/2REG
|
5 3/4
|
NC50
|
6 3/8
|
141.3
|
2 13/16
|
758
|
|
5 1/4"
|
40
|
Standard
|
6 5/8REG
|
7 3/4
|
5 1/2FH
|
7
|
175.4
|
3 1/4
|
1202
|
|
40
|
Standard
|
6 5/8REG
|
7 3/4
|
NC56
|
7
|
175.4
|
3 1/4
|
1196
|
In China
