Kelly drilling, Performance data, Kelly bars – Liebherr LB 28 User Manual
Page 10: Technical data, Lb 28 with optional equipment, 56 m, 25 m
10
LB 28
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
A
6.2 ft
X
Display for Kelly drilling
Performance data
Max. drilling diameter*
7.5 ft uncased
Max. drilling diameter*
4.9 ft cased
Kelly bars
A
X
Drilling
depth
Weight
Kelly Ø
(ft)
(ft)
(ft)
(lbs)
(inch)
MD 28/3/24
32.4
41.0
72.2
11,025
16.5
MD 28/3/27
35.7
37.7
82.0
12,125
16.5
MD 28/3/30
39.0
34.4
91.9
13,010
16.5
MD 28/3/33
42.3
31.2
101.7
14,110
16.5
MD 28/3/36
45.5
27.9
111.5
14,995
16.5
MD 28/4/36
37.6
36.1
111.5
16,095
16.5
MD 28/4/42
42.5
31.2
131.2
17,860
16.5
MD 28/4/48
47.4
26.2
150.9
19,845
16.5
MD 28/4/54
52.3
21.3
170.6
21,605
16.5
MD 28/4/60
57.3
16.4
190.3
23,590
16.5
MD 28/4/66
62.2
11.5
210.0
25,575
16.5
MD 28/4/72
67.1
6.6
229.7
27,450
16.5
*) 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.
Technical data
Rotary drive - torque
236,020 lbf-ft
Rotary drive - speed
46 rpm
Kelly drilling
LB 28 with optional equipment