Control Exam Practice Questions And

IWCF Level 3 Well Intervention Pressure Control Exam Practice Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• Which of the following is the primary purpose of a blowout preventer

(BOP) during well intervention?

• Increase production rate
• Prevent uncontrolled flow of formation fluids
• Monitor drilling mud density
• Stabilize the drill string

Rationale: The primary purpose of a BOP is to prevent uncontrolled flow of

formation fluids, ensuring well control during intervention operations.

• What is the main function of the annular preventer?
• Provide a passage for wireline tools 1 / 4

• Seal around any size of tubing or drill pipe
• Circulate drilling fluid
• Measure well pressure

Rationale: The annular preventer is designed to seal around various sizes

of tubulars or even an open hole.

• Which type of BOP is used specifically for pipe ram operations?
• Annular BOP
• Ram BOP
• Diverter BOP
• Subsea BOP

Rationale: Ram BOPs are used for sealing around the drill pipe or

completely closing the wellbore in emergencies.

• During a well intervention, you notice a slow increase in surface

pressure. What is the most likely cause?

• Pump failure
• Kick from formation fluid
• Tool string stuck in hole
• Circulation loss

Rationale: A gradual increase in surface pressure is often indicative of a

kick, where formation fluids enter the wellbore.

• What is the recommended method to verify BOP function before

starting well intervention? 2 / 4

• Visual inspection only
• Pressure testing each preventer
• Running wireline
• Circulating drilling mud

Rationale: Pressure testing each BOP is critical to ensure proper function

and integrity before intervention.

6. The term “kill mud” refers to:

• Mud that lubricates the drill string
• Mud that enhances production
• Mud weighted to control formation pressure
• Mud used for cementing

Rationale: Kill mud is a high-density fluid used to control formation

pressure and prevent kicks.

• Which operation is considered a primary well control method during

intervention?

• Using a slickline
• Closing the BOP to seal the well
• Logging the well
• Pulling tubing

Rationale: Primary well control involves directly preventing influx, typically

by sealing the well with a BOP. 3 / 4

• In subsea well intervention, the hydraulic system for the BOP is

primarily used to:

• Circulate mud
• Operate the crane
• Open and close the BOP
• Measure formation pressure

Rationale: Subsea BOPs are operated hydraulically to control the opening

and closing of rams or annular preventers.

• When performing a well kill operation, what is the main objective?
• Increase flow rate
• Reduce mud density
• Stop the influx of formation fluids
• Pull tubing safely

Rationale: Well kill operations are aimed at stopping the influx and

regaining control of the well.

• What is the correct action if a ram BOP cannot fully close around

the drill pipe?

• Continue intervention
• Circulate faster
• Shut in the annular preventer
• Pull the pipe immediately
• / 4