Exam Practice Questions And Correct

IWCF Level 4 Supervisor Well Control Exam Practice Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• What is the primary purpose of a kick detection system on a drilling

rig?

• To monitor drilling fluid viscosity
• To detect formation pressure changes
• To detect influxes of formation fluids into the wellbore
• To control the mud pump rate

Rationale: Kick detection systems monitor for any influx of formation

fluids into the wellbore, allowing early action to prevent a blowout.

• Which factor most influences the choice of well control method?
• Drilling crew experience 1 / 4

• Type and size of the influx
• Rig location
• Mud color

Rationale: The well control method is selected primarily based on the

characteristics of the influx, including its volume and pressure.

3. The primary function of the blowout preventer (BOP) is to:

• Increase drilling efficiency
• Maintain mud circulation
• Prevent uncontrolled flow of formation fluids
• Reduce mud weight

Rationale: BOPs are safety devices designed to prevent uncontrolled

formation fluid flows during drilling.

• What is the main purpose of a diverter system?
• To increase drilling speed
• To circulate mud
• To safely divert unexpected flow away from personnel
• To measure well depth

Rationale: Diverters provide a controlled path for fluids when a kick

occurs, reducing the risk to personnel.

• When should the choke manifold be used?
• During normal circulation
• During a well control situation
• Only during tripping operations 2 / 4

• For mud weight adjustments

Rationale: The choke manifold is specifically used to control wellbore

pressure during well control operations.

• What is the correct sequence for closing the annular preventer?
• Choke open, annular closed, kill line closed
• Annular closed, circulate through choke, monitor pressure
• Circulate mud, then close annular
• Open choke, then close annular

Rationale: Closing the annular preventer stops flow while allowing

controlled circulation through the choke.

• Which of the following is a primary responsibility of the supervisor

during a well control event?

• Recording mud volumes
• Directing and coordinating the well control operation
• Operating the mud pumps
• Measuring drill pipe length

Rationale: The supervisor oversees the operation, ensuring correct

procedures are followed and personnel are safe.

8. The term “shut-in drill pipe pressure” refers to:

• Pressure measured while circulating
• Pressure in the drill pipe when the well is closed in
• Hydrostatic pressure in the annulus
• Pressure at the mud pits 3 / 4

Rationale: Shut-in drill pipe pressure is measured when the well is

closed to evaluate formation pressure.

9. The main advantage of using a kill weight mud is:

• Reducing drilling costs
• Controlling the well by balancing formation pressure
• Improving ROP (Rate of Penetration)
• Enhancing mud viscosity

Rationale: Kill weight mud ensures hydrostatic pressure exceeds

formation pressure, preventing further influx.

• During a well kick, what is the first action a supervisor should

ensure?

• Increase pump rate
• Close the BOP to stop flow
• Record mud volume
• Lower the drill string

Rationale: Stopping flow immediately is critical to prevent escalation

of a kick to a blowout.

• What is the function of the choke line during well control?
• To remove cuttings
• To allow controlled flow of fluids from the well
• To measure mud weight
• To increase circulation rate
• / 4