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11. If the ground is too hard for the conductor pipe to be driven, crew members can
use the … to drill the conductor hole
a) regular rig
b) additional rig
c) extra rig
d) no correct variant

12. A kelly can be up to 54 feet, or …, long
a) 13 metres
b) 17 metres
c) 19 metres
d) no correct variant

13. A drill site is anywhere … exist or may exist.
a) carbon and methane
b) oil and gas
c) carbon and oxygen
d) no correct variant

14. What is a shallow hole drilled off to the side of the main borehole called?
a) a bit
b) a rathole
c) a chisel
d) no correct variant

15. What is part of the system that rotates the bit?
a) casing
b) kelly
c) chisel
d) no correct variant

16. Usually, reserve pits are relatively shallow, maybe no more than … deep
a) 3metres
b) 8 metres
c) 6 metres
d) no correct variant

17. At a land site, the site-preparation contractor may dig ....
a) a rathole
b) a reserve pit
c) a mousehole
d) no correct variant

18. Is that true that today, companies drill wells in frozen wildernesses, remote
deserts, mosquito-ridden marshes, hot and humid jungles?

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