1. Katere vrste vrtalnih palic se uporabljajo pri jedrnem vrtanju?
ü Aluminium alloy drill rods
ü Seamless Steel drill rods
ü Wire-line drill rods (welded pipes)
2.Kaj so nameni cevi za ohišje?
ü To penetrate and stabilize the overburden
üTo stabilize non-stable formations with a tendency to cave in
3. Zakaj bi morali vedno uporabljati ključe s polnim oprijemom, ko delate na primer z zračnicami in ohišji dvigala jedra?
ü It is important to use the right type of rod wrench. So called universal rod tongs should be avoided especially when it comes to breaking or tightening the thread of an inner tube or any other thin walled piping. Universal tongs can easily destroy thin walled piping. For these pipes only so called full grip wrenches should be used.
4. Katere vrste ribiškega orodja morajo biti vedno na voljo na mestu vadbe?
ü No matter how careful the driller and the helper are, sooner or later they will
ü accidently drop a tool down the drill hole. Drill pipes can also break in the hole.
ü These items must be removed before the drilling can continue. Normally, according to the hole size of the projects, we should prepare 1 or 2 sets of NWL(NQ), HWL(HQ), PWL(PQ) sizes of rod recovery rod at the site.
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