Length of casing section
Max. length of
Kelly bar BK 110/305/...
1
3.3
2
6.6
2.5
8.2
m
ft
10
32.8
20
65.6
30
98.4
40
131.2
50
164.0
m
ft
0
0
m
ft
m
ft
m
ft
m
ft
m
ft
...3/21
Ø 1,000 mm (3.3 ft)
...4/30
Ø 1,000 mm (3.3 ft)
tool must be disassembled
for picking up
can be picked up with effective
tool length 700 mm (2.3 ft)
510
1.7
Drill diameter
Drilling depth with
Kelly bar BK 110/...
760
2.5
1,524
5.0
1,000
3.3
1,650
5.4
mm
ft
10
32.8
20
65.6
30
98.4
40
131.2
50
164.0
m
ft
0
0
m
ft
m
ft
m
ft
m
ft
m
ft
...305/3/21
...305/4/30
...305/4/40
...368/5/49
2860 - 3660
9.4 - 12 ft
2790
9.2 ft
16540
54.3 ft
16540
54.3 ft
2860 - 3660
9.4 - 12 ft
2790
9.2 ft
Standard configuration – Kelly drilling
BG 11 H
Cased Kelly drillingUncased Kelly drilling
Data shown are valid for maximum
permitted horizontal mast reach
and using BAUER attachment.