FlexiQuiz - WELL CONTRACTORS CERTIFICATION CONSTRUCTION EXAM

What are two differences in drilling into soft formation versus rock?

Pipe or casing must follow the drill bit closely

Casing has to be driven

The drilling effect of the bit is a loosening/mixing action

All of the above

After chlorination, how long should the well be pumped before placing the well back into use:

Chlorine tested at 50ppm in water

Until water changes color

When water changes temperature

No detectable chlorine is found

If there is a concern of boulders at a certain site, it may be better to drill an _________

Test well

Exploratory hole

Excavation site

None of the above

When an open borehole has been drilled below the depth to which the casing is to be grouted, what must happen:

Lower part of the hole must be backfilled

A bridge must be set in the hole

Sticks should be placed in frame

Both A & B

Drilling fluid may have many essential functions to include:

Removed cuttings from the bottom of the hole

Suspend cuttings when circulation has stopped

Cool and clean the drill bit

All of the above

WELL CONTRACTORS CERTIFICATION CONSTRUCTION EXAM