FlexiQuiz - WELL CONTRACTORS CERTIFICATION CONSTRUCTION STANDARDS QUIZ1

Air rotary drilling is when air is circulated through the drill pipe, through ports in the drill bit and upward in the _____ space around the drill pipe

Bore

Annular

Ring

Flat

When might spacing between wells in well point systems be greater than 50ft

Depth and thickness of the aquifer allow well screens 10ft or longer

Large pockets of rocks within aquifer

Piping is too large

None of the above

Which are the following are not good features of a well screen:

Close spacing of slot openings to provide maximum open area

Adaptibility to different conditions by use of various materials

Ample strength to resist forces during and after installation

Non single metal construction that rusts quickly

When removing wells screens of 16 inch diameter or larger a _______ is used at the lower end of the pulling pipe instead rather than sacking

Fork

Spear

Steel disk

End pipe

Drilling fluid essential functions include all of the following EXCEPT:

Seal wall of the borehole to reduce fluid loss

Cool and clean the drill bit

Support the wall of the borehole to prevent caving

Pushes cuttings to t he bottom of the drilling hole

All of the above