# Well Control: Activity 9

1) You have to increase the drill pipe pressure by approximately 100 psi by manipulating the choke, during a well kill operation. Of the following options, which one would you choose?

a. Keep closing the choke until you see the drill pipe pressure start to rise.
b. Increase the choke pressure by 100 psi and wait for the drill pipe pressure to rise.

2) If the cutting load in the annulus was high and the well had been shut-in on a kick. (Answer YES or NO to each question.)

a. Would the drill pipe pressure be higher than in a clean well?    ____________
b. Would the casing pressure be higher than in a clean well? ____________
c. Would the casing pressure be lower than in a clean well? ____________

3) A well is being killed correctly, using a constant bottom hole pressure method. At what stage during a kill operation can choke pressure readings exceed MAASP without affecting Casing Shoe integrity?

a. Kill mud circulated to bit
b. Influx is in annulus above casing shoe.
c. Influx is on bottom.
d. Influx is in open hole section.

4) A kick is being circulated out at 30 SPM, Drill Pipe Pressure reads 550 psi and Casing pressure 970 psi. It is decided to slow the pumps to 20 SPM while maintaining 970 psi. on the casing gauge. How will this affect bottom hole pressure (exclude any ECD effect)? Pick one answer.

a. Increase
b. Decrease.
c. Stay the same.
d. No way of telling.

5) Well Data

Slow rate circulation pressure = 500 psi at 40 strokes/min
The well has been shut-in after a kick
Shut-in Drill Pipe Pressure = 800 psi
Shut-in Casing Pressure = 1,100 psi
Circulation is started with the original mud. While the pump is being brought up to 40 strokes/min, which pressure has to remain constant to maintain the correct bottom hole pressure?

a. 800 psi on the drill pipe gauge.
b. 2,300 psi on the drill pipe gauge.
c. 1,100 psi on the casing gauge.
d. 1,600 psi on the casing gauge.

6) If a well was closed in after the first circulation of the driller's method, what value would you expect on the drill pipe and casing pressure gauges?

a. Shut in drill pipe pressure = 0 psi; shut in casing pressure = 525 psi
b. Both pressures should be equal to the original shut in drill pipe pressure.
c. Both pressures should read zero.

7) On the second circulation of the driller's method if the casing pressure was held constant until the kill mud reached surface, what would happen to the bottom hole pressure?

a. increase
b. decrease
c. stay the same

8) A well is being killed using the Driller’s method.

Original Shut-in Drill Pipe Pressure = 500 psi
Original Shut-in Casing Pressure = 900 psi

After the first circulation the well is shut-in and pressures allowed to stabilize. They then read:

Shut-in Drill Pipe Pressure = 500 psi
Shut-in Casing Pressure = 650 psi

It is decided not to spend any more time cleaning the hole. Which one of the following actions should be taken.

a. Prepare to use the wait and weight method.
b. Bullhead annulus until shut-in casing pressure is reduced to 500 psi.
c. Reverse circulate until shut-in casing pressure is reduced to 500 psi.
d. Continue with second circulation of driller’s method (holding casing pressure constant until kill mud reaches the bit).

9) A saltwater kick is circulated out using the Drillers method. The drill string consists of drill collars plus drill pipe and a surface BOP stack is used. When will the surface casing pressure be at its maximum value?

a. When the kill fluid is entering the drill pipe.
b. When the kick has been circulated to the surface.
c. Only when a kick reaches the casing shoe.
d. Just after the kill fluid reaches the bit.
e. Immediately after the well has been shut in.

10) Which statement is correct when comparing the Drillers method and the Wait & Weight method?

a. The Drillers method will give the lowest casing shoe pressure when the open hole annulus volume is larger than the drill string volume.
b. The Wait & Weight method will give the lowest casing shoe pressure when the open hole annulus volume is smaller than the drill string volume.
c. The Wait & Weight method will give the lowest casing shoe pressure when the open hole annulus volume minus the gain is larger than the drill string volume.
d. The Wait & Weight method will always give a lower maximum pressure on the casing shoe than the Drillers method.

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