Bit Quiz

Question 1

What are the 2 kinds of bits?

Answer 1

Rock/ Roller Cone Bits and PDC (PolyDiamond Compact) Bits

Question 2

What are the 3 main bit selection criteria?

Answer 2

Economics, geological prognosis, and bit grading

Question 3

Name 4 of the 7 drilling parameters

Answer 3

ROP, MWT, HP, Pump Pressure, Torque, WOB, Flow Rate

Question 4

What do the 3 numbers for bit classifications stand for?

Answer 4

bit type, formation type, and bearing type + gauge protection (in that order)

Question 5

what does IADC stand for?

Answer 5

international association of drilling contractors

Question 6

What are the 3 kinds of bit cutting mechanisms?

Answer 6

Crushing (roller cone), Shearing (PDC), Grinding (Diamond)

Question 7

What is setback capacity?

Answer 7

total drill string weight + casing weight

Question 8

know the bit cost equation.

Answer 8

bit cost+rig cost(trip time+rotating time+circulating time) divided by Y=(depth out-depth in)

Question 9

what are milled tooth bits used for?

Answer 9

surface hole and soft formations

Question 10

what bit is best for very hard formations?

Answer 10

tungsten carbide insert bits

Question 11

what are PDC bits best for?

Answer 11

soft to medium hard formations

Question 12

what are the 2 most important bit parameters?

Answer 12

RPM and WOB

Question 13

what is bit whirl?

Answer 13

when the bit and drill string rotate in the opposite direction