Kelly drilling, Technical data, Performance data – Liebherr LB 20 User Manual
Page 7: Kelly bars, 56 m, 25 m, A6.2 ft x
LB 20
7
10 54
3
700
1000
1600
1900
2200
0
20
40
60
80
100
Nm
%
-5.56 m
1.23
m/min
KELLY
188.2
kN
-24.25 m
0.00
m/min
200
kN
-63.9
kN
°
0.1
°
0.0
0
100
200
300
400
bar
0
100
200
300
400
bar
0
200
300
400
bar
2
15
83 mm/U
m
-24.3
100
0
100
200
300
1300
2
MODE
:
rpm
Display for Kelly drilling
A
6.2 ft
X
Kelly drilling
Technical data
Rotary drive - torque
169,640 lbf-ft
Rotary drive - speed
52 rpm
Performance data
Max. drilling diameter*
4.9 ft uncased
Max. drilling diameter*
3.9 ft cased
Kelly bars
A
X
Drilling
depth
Weight
Kelly Ø
(ft)
(ft)
(ft)
(lbs)
(inch)
MD 20/3/24
32.1
22.6
73.2
9,040
14.5
MD 20/3/27
35.4
19.4
83.0
9,920
14.5
MD 20/3/30
38.7
16.0
92.8
10,585
14.5
MD 20/3/33
42.0
12.8
102.7
11,465
14.5
MD 20/4/36
37.3
17.7
112.5
13.890
14.5
MD 20/4/42
42.2
12.8
132.2
15,215
14.5
MD 20/4/48
47.1
7.9
151.9
24,934
14.5
MD 20/4/54
52.0
3.0
171.6
18,520
14.5
*) Other drilling diameters available on request
Other Kelly bars available on request
When using a casing oscillator, value X has to be reduced
by 4.9 ft.