Liebherr LB 20 - Manual (Page 7)

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.