IADC Exam - Drlg

Question 1

Which of the following indicators may warn of an increase in formation pressure?

A. ROP
B. Torque
C. RPM
D. All of the above

Answer 1

D

Question 2

Which of the following statements best describes formation porosity?

A. The ability of the formation to flow fluid
B. The ability of gas to move within the rock
C. The presence of sufficient water volume to provide gas lift.
D. The percentage of void space in a rock

Answer 2

D

Question 3

Which of the following statements best describes formation permeability?

A. The ratio of the pore spaces to the total volume of the rock
B. The presence of sufficient water volume to provide gas lift
C. The ability of the formation to flow fluid
D. All of the above

Answer 3

C

Question 4

What is meant by abnormal formation pressure?

A. Formation fluid pressure that exceeds normal fresh water hydrostatic pressure
B. The excess pressure that needs to be applied to cause a leak-off into a normally pressured formation
C. High de airy mud used to create a large overbalance
D. Formation fluid pressure that is greater than the hydrostatic pressure caused by a full column of formation water

Answer 4

D

Question 5

If the fluid level dropped 400 ft in an 8700’ hole containing 12.4 ppg mud, what would the hydrostatic pressure be at the bottom of the well?

A. 5609 psi
B. 5596 psi
C. 5352 psi
D. 5111 psi

Answer 5

C

Question 6

While TOH with tapered string, what would the trip tank volume indicate as the slug is being displaced into smaller diameter pipe? (Larger diameter is the upper part)

A. Same rate of change for both large and small diameter pipe
B. Swabbing
C. Surging
D. No change since it is a tapered string

Answer 6

B

Question 7

A gas kick goes into solution in OBM. At that time, what would you probably see on surface?

A. Increasing flow rate and decrease pit level
B. Pit gain greater than the volume of the kick
C. Pit gain either equal or smaller than volume of kick
D. Decreasing flow rate and decreasing pit level

Answer 7

C

Question 8

The part of the system pressure loss that is exerted on the formation is:

A. Surface equipment
B. Through drill string
C. In the annulus
D. Through bit

Answer 8

C

Question 9

What is primary means of preventing kicks?

A. Mud hydrostatic to balance fluid pressure in formation
B. SCR used in kill process
C. BOP to close well that is flowing
D. Pit volume and flow rate measuring devices to recognize a kick

Answer 9

A

Question 10

Which of the following factors affects SIDPP?

A. Formation pressure
B. Influx volume
C. Influx gradient
D. Drill string capacity

Answer 10

A

Question 11

Why is a 20 bbl kick in a small annulus more significant than a 20 bbl kick in a large annulus?

A. KWM cannot be easily calculated
B. Kicks are usually gas and kick volume would not matter
C. Results in higher casing pressure
D. Pipe is more prone to getting stuck

Answer 11

C

Question 12

A heavy mud pill is circulated into the well without stopping the pump at any time. At what moment will BHP start to increase?

A. Once pill starts to be pumped into drill pipe
B. Once pill has been displaced into the annulus
C. Once pill starts to be displaced into the annulus

Answer 12

C

Question 13

What happens to surface pressure when gas breaks out of OBM while circulating out the kick?

A. Increases rapidly
B. Decreases rapidly
C. Stays the same

Answer 13

A

Question 14

What is the most common cause of abnormal formation pressure worldwide?

A. Carbonate layers
B. Trapped fluid in shale
C. Artesian system
D. Salt dome

Answer 14

B

Question 15

When pumping, the standpipe pressure will be slightly lower than the pressure at the pump. What is the most likely reason for this?

A. Standpipe gauge is situated at a higher elevation than the pump gauge
B. The pressure loss from the pump to the standpipe
C. Hydrostatic pressure of the mud in the standpipe

Answer 15

B

Question 16

The well has been losing mud while drilling the last stand. At the connection the well continues to flow with pumps off. What is the first action the driller should take?

A. Inform his supervisor
B. Continue checking for flow and record pit gain
C. Shut the well in

Answer 16

C

Question 17

If the cuttings load in the annulus was high and the well is shut in on a kick, would the drill pipe pressure be higher than in a “clean” well?

A. Yes
B. No

Answer 17

B

Question 18

If the cuttings load in the annulus was high and the well is shut in on a kick, would the casing pressure be higher than in a “clean” well?

A. Yes
B. No

Answer 18

A

Question 19

When pumping at 10 bpm the pump pressure is 2050 psi. What would be the estimated pump pressure if the pump rate was changed to 80 spm? Pump output: 0.1 bbl/stk

A. 1312 psi
B. 3203 psi
C. 1640 psi
D. 2562 psi

Answer 19

A

Question 20

MW: 10.3 ppg
TVD/MD: 11,600'/12,500' 
Surf Equip pressure loss: 100 psi
Drill string pressure loss: 0.08 psi/ft
Bit nozzle pressure loss: 1500 psi
Annular pressure loss: 250 psi 

What is the circulating pressure? (Pump pressure)
What is the bottom hole pressure while circulating?

Answer 20

A. 2850 psi

D. 6463 psi

Question 21

In which of the following cases would you most likely swab in a kick?

A. Halfway in cased hole
B. Halfway out of the open hole
C. First few stands pulled off bottom
D. When tripping back to bottom

Answer 21

C