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GEAX
s.r.l.
MAINTENANCE ACCORDING TO THE CONDITIONS OF THE DRILLING
3.1 General information concerning maintenance according to the
conditions of the drilling machine.
Non-scheduled maintenance operations
3.1.1
This refers to the operations that are carried out when certain
situations/conditions occur on the drilling machine, regardless of the work
time. Such anomalies appear during scheduled inspections on the machine or
during operation. They may relate to the replacement of parts or to the
adjustment or setting to compensate for normal wear. The diagram in
shows A2 class activities.
fig.1.1.4.1
3.2 Maintenance on ropes according to the conditions of the drilling
machine.
Conditions requiring the replacement of the rope or intensification of
3.2.1
inspections
While inspecting the rope one must check:
a) the diameter of the rope;
b) the amount of broken or extremely worn wires;
c) the presence of any anomalies in shape and/or damages
The replacement must be immediate in the following conditions
(standard ISO 4309/90):
aa) if the diameter is lower than 93% of the initial nominal diameter (even in
just one point); consult
bb) if the amount of broken wires in the most worn section exceeds one of the two
values indicated in the table
the wires which due to wear are lower than 50% of the initial section;
main winch rope
9
auxiliary winch rope
7
MAINTENANCE ACCORDING TO THE CONDITIONS OF THE DRILLING M.
and/or localised wear.
par. 2.2.2.2
tab. 3.1.2.1
Broken wires every 6d
Broken wires every 6d
Chapter 3
Chapter 3
MACHINE
for further details;
; in the count one must also consider
(54mm)
1
(42mm)
1
tab. 3.1.2.1
Broken wires every 30d
(270mm)
2
Broken wires every 30d
(210mm)
2
3-1
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