GEAX
s.r.l.
Chapter 3
DRILLING RIG JOBSITE OPERATIONS
6
In general, when the rig is moving, the bucket should be held as low as
possible (as shown in the figures), but not so low as to risk scraping on
uneven ground. This might damage the rig structure or make the rig unstable.
Inspect the path of travel before shifting the rig, checking for narrow or low
passages, overhead cables or any other obstacles that might interfere with
the moving rig.
The speed of travel depends on the terrain's roughness and
gradients: slow down to minimum speed when approaching the
gradient limits described above, to avoid destabilizing the rig. The
angles of inclination shown in the figures must not be exceeded at any time,
not even for a few moments.
3.2 Setting up the drilling rig
3.2.1
Work area
The place of installation should be adequately wide and flat, so that
the crawler tracks have enough support to prevent dangerous
swaying during rig operations. The surface of the standing area
may also be non-horizontal. In this case the angle of inclination, measured
along the line of maximum slope, should be less than 2° (3% gradient).
During operation, however, the kelly bar does not have to crawl on the
retaining ring.
If the rig is to be used in an indoor location, install a system for extracting the
exhaust fumes and discharging them outside.
3.3. Prior safety assessment of working conditions
3.3.1
Manoeuvring space
Make sure there is a safe distance between the drilling rig and
nearby structures or non-removable objects, in order to prevent
possible contacts. Check the distance from overhead cables; no rig
manoeuvre
– even if done by mistake – should lead to any contact. Make
sure there is an adequate passageway for the mechanical shovel that will be
removing the material dug out by the drill. Make agreements with the ground
operator on the route to be followed by the mechanical shovel and on its
waiting place, which should be visible from the rig’s cab.
