Well Control - Quiz
- 1.
What is the definition of a barrier?
- A.
The warning tape around the work site
- B.
Anything that prevents the flow of wellbore fluids
- C.
An overbalanced fluid
- D.
BOP locking stems
Correct Answer
B. Anything that prevents the flow of wellbore fluidsExplanation
Barriers prevent flow from the wellbore.Rate this question:
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- 2.
Which of the following describes the types of barriers?
- A.
Positive and negative
- B.
Pump on and pump closed
- C.
Mechanical and fluid
- D.
Overbalanced and underbalanced
- E.
Primary and secondary
- F.
Upper and lower
Correct Answer
C. Mechanical and fluidExplanation
The correct answer is "Mechanical and fluid." This answer describes the types of barriers that can exist. Mechanical barriers refer to physical obstacles that prevent the movement or flow of substances, while fluid barriers involve the use of fluids to block or control the flow of substances. This answer accurately identifies the two different types of barriers.Rate this question:
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- 3.
Which are common fluid barriers (3 answers):
- A.
Seawater
- B.
Diesel
- C.
Brine
- D.
Nitrogen
- E.
Condensate
- F.
Drilling mud
Correct Answer(s)
A. Seawater
C. Brine
F. Drilling mudExplanation
Seawater, Brine and Drilling are the most commonRate this question:
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- 4.
During an intervention operation it becomes necessary to kill the well. Which is the most important appropriate kill method?
- A.
Volumetric
- B.
Forward circulation
- C.
Wait and Weight
- D.
Bullheading
- E.
Concurrent
Correct Answer
D. BullheadingExplanation
Bullheading is the best method for intervention operation.Rate this question:
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- 5.
A kick has been swabbed in while tripping. Which of the following is an indication that the influx is below the bit and that stripping to bottom will be required?
- A.
The SIDPP is higher than SICP
- B.
The SIDPP is lower than SICP
- C.
The SIDPP is equal to SICP
- D.
None of the above
Correct Answer
C. The SIDPP is equal to SICPExplanation
Same fluid, same Hydrostatic Pressure, same readingRate this question:
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- 6.
Under which circumstance would the Wait and Weight Method provide lower equivalent pressures at the casing shoe than the Driller's Method?
- A.
The pressures at the casing are the same regardless of the kill method used
- B.
When the drill string volume is more than annulus open hole volume
- C.
When annulus open hole volume is less than the drill string volume
- D.
When the drill string volume is less than the open hole volume
Correct Answer
D. When the drill string volume is less than the open hole volumeExplanation
Lower volume inside Drill String means lower Equivalent PressuresRate this question:
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- 7.
What is a reason for measuring Choke Line Friction (CLF) pressure?
- A.
To determine how much to allow casing pressure to increase at the start of a kill operation
- B.
To determine how much to allow drill pipe pressure to increase at the start of a kill operation
- C.
To determine if the choke and kill lines should be used during the kill operation
- D.
To help determine possible pressure increase during the final stages of a well kill
Correct Answer
D. To help determine possible pressure increase during the final stages of a well killExplanation
CLF is important to check increase pressure during the final stages of a well killRate this question:
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- 8.
A subsea rig has shut in the well on a kick. The choke line is filled with drill water. Well Data: Choke line length 4200 feet Weight of drill water 8.3 ppg Mud weight 12.3 ppg SICP 1430 psi Before starting the kill operation the choke line is displaced to 12.3 ppg mud. What will be the new SICP?
- A.
1020 psi
- B.
922 psi
- C.
556 psi
- D.
432 psi
Correct Answer
C. 556 psiExplanation
SICP = (12.3 - 8.3) * 0.052 * 4200 = 873 psi # SICP = 1430 - 873.6 = 556.4 psiRate this question:
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- 9.
Why is it necessary to select the correct kill fluid? (2 answers)
- A.
Enable a lower kill pump rate
- B.
To minimize Formation Pressure
- C.
To enable a higher kill pump rate
- D.
To ensure formation fluid compatibility
- E.
To reduce annulus losses
Correct Answer(s)
A. Enable a lower kill pump rate
D. To ensure formation fluid compatibilityExplanation
The correct answer is to enable a lower kill pump rate and to ensure formation fluid compatibility. Selecting the correct kill fluid allows for a lower kill pump rate, which can be beneficial in controlling the pressure and preventing any damage to the formation. Additionally, using the right kill fluid ensures compatibility with the formation fluid, minimizing any potential reactions or complications that could arise during the killing process.Rate this question:
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- 10.
Which depth is used to calculate volumes?
- A.
TVD
- B.
MD
Correct Answer
B. MDExplanation
TVD - True Vertical Depth is used to calculate pressure, kill mud weight and Depth. MD - Used for volumes and strokes.Rate this question:
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