Hole
|
Bit type
|
Bit
manufacturer
|
Penetration
(m)
|
Operating
times
|
Comments
|
| (min) |
(hr)
|
1104A
|
Concentric
|
SDS
|
1.5-2.5
|
50
|
0.83
|
Lack of
penetration
|
1104B
|
Concentric
|
SDS
|
2-3
|
200
|
3.33
|
Lack of
penetration
|
1104C
|
Concentric
|
SDS
|
0
|
35
|
0.58
|
Valve
cracked
|
1104C
|
Concentric
|
SDS
|
1-1.5
|
190
|
3.17
|
|
1104D
|
Concentric
|
SDS
|
0.5
|
55
|
0.92
|
Lack of
penetration
|
1104E
|
Concentric
|
SDS
|
0.5-1
|
95
|
1.58
|
Arms welded
shut, stuck in hole
|
1106A
|
Concentric
|
Holte
|
1.5-2
|
215
|
3.58
|
Cracked
valve
|
1106B
|
Eccentric
|
Holte
|
0.5-1
|
120
|
2.00
|
Lack of
penetration
|
1106C
|
Flat face
|
SDS
|
0.5-1
|
45
|
0.75
|
New
cartridge, piston binding, intermittently running
|
1106D
|
Flat face
|
SDS
|
0.25
|
15
|
0.25
|
New
cartridge, piston binding, intermittently running
|
1106E
|
Flat face
|
SDS
|
6
|
100
|
1.67
|
Lost hammer
assembly
|
Totals:
|
|
|
14.25-18.75
|
|
18.67
|
|
