|
SFMC Kellys are made from 4145H modified alloy steel in accordance with API Spec.7-1 latest edition, which are quenched and tempered along full length. A hardness range of 285 to 341 BHN and a minimum impact value of 54 Joules as per ASTM A 370 Charpy-V, these values are guaranteed one inch below the surface. SFMC kelly bars are inspected by an ultrasonic unit over their full length and full section. The wall thickness of each flat of the drive section is verified ultrasonically. All kellys’ connectons are fitted with pressed steel thread protectors on both ends and each kellys would be shipped with steel scabbard for marine transportation.
Specification for Square Kelly
Nom Size
(in) |
Lengths
(ft)
|
Top Upset Joint
|
Bottom Upset
|
Bore
|
Drive Section
|
Weight
(kg)
|
|
Standard
|
Optional
|
|
A
|
B
|
LH
Connection
|
OD C
|
LH Connection
|
OD C
|
RH Connection
|
OD D
|
E
|
F
|
G
|
Standard
|
Optional
|
|
(in)
|
(in)
|
(in)
|
(in)
|
(in)
|
(in)
|
|
2 1/2
|
40
46
|
37
43
|
6 5/8 Reg
|
7 3/4
|
4 1/2 Reg
|
5 3/4
|
NC26
(2 3/8 IF)
|
3 3/8
|
1 1/4
|
3 1/4
|
2 1/2
|
410
465
|
360
420
|
|
3
|
40
46
|
37
43
|
6 5/8 Reg
|
7 3/4
|
4 1/2 Reg
|
5 3/4
|
NC31
(2 7/8 IF)
|
4 1/8
|
1 3/4
|
3 7/8
|
3
|
495
560
|
450
515
|
|
3 1/2
|
404654
|
37
43
51
|
6 5/8 Reg
|
7 3/4
|
4 1/2 Reg
|
5 3/4
|
NC38
(3 1/2 IF)
|
4 3/4
|
2 1/4
|
4 3/7
|
3 1/2
|
600
670
780
|
555
630
730
|
|
4 1/4
|
404654
|
37
43
51
|
6 5/8 Reg
|
7 3/4
|
4 1/2 Reg
|
5 3/4
|
NC46(4 IF)orNC50(4 1/2 IF)
|
6or6 3/8-6 1/2
|
2 4/5
|
5 1/2
|
4 1/4
|
825
940
1070
|
780
890
1040
|
|
5 1/4
|
40
46
54
|
37
43
51
|
6 5/8 Reg
|
7 3/4
|
--
|
--
|
NC50or
5 1/2 FH orNC56
|
7
|
3 1/4
|
6 3/4
|
5 1/4
|
1250
1430
1670
|
--
|
|
6
|
40
46
54
|
37
43
51
|
6 5/8 Reg
|
7 3/4
|
--
|
--
|
6 5/8 FH
|
8
|
3 1/2
|
7 5/8
|
6
|
1670
1920
2250
|
--
|
Specification for Hex kellys
Nom Size
(in) |
Lengths
(ft)
|
Top Upset Joint
|
Bottom Upset
|
Bore
|
Drive Section
|
Weight
(kg)
|
|
Standard
|
Optional
|
|
A
|
B
|
LH
Connection
|
OD C
|
LH Connection
|
OD C
|
RH Connection
|
OD D
|
E
|
F
|
G
|
Standard
|
Optional
|
|
(in)
|
(in)
|
(in)
|
(in)
|
(in)
|
(in)
|
|
3
|
40
46
|
37
43
|
6 5/8 Reg
|
7 3/4
|
4 1/2 Reg
|
5 3/4
|
NC26
(2 3/8 IF)
|
3 3/8
|
1 1/4
|
3.375
|
3
|
450
500
|
400
555
|
|
3 1/2
|
40
46
54
|
37
43
51
|
6 5/8 Reg
|
7 3/4
|
4 1/2 Reg
|
5 3/4
|
NC31
(2 7/8 IF)
|
4 1/8
|
1 3/4
|
3.937
|
3 1/2
|
580
670
780
|
535
620
730
|
|
4 1/4
|
404654
|
37
43
51
|
6 5/8 Reg
|
7 3/4
|
4 1/2 Reg
|
5 3/4
|
NC38
(3 1/2 IF)
|
4 3/4
|
2 1/4
|
4.781
|
4 1/4
|
750
840
980
|
700
800
940
|
|
5 1/4
|
40
46
54
|
37
43
51
|
6 5/8 Reg
|
7 3/4
|
--
|
--
|
NC46(4 IF)orNC50(4 1/2 IF)
|
6or6 3/8-6 1/2
|
2 13/16or3 1/4
|
5.9
|
5 1/4
|
1020
1170
1350
|
--
|
|
6
|
40
46
54
|
37
43
51
|
6 5/8 Reg
|
7 3/4
|
--
|
--
|
NC50or
5 1/2 FH orNC56
|
7
|
3 1/2
|
6.812
|
6
|
1320
1500
1770
|
--
|
|
