Well Control Certification Practice Exam

IADC WellSharp Well Servicing – Wireline Well Control Certification Practice Exam Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• What is the primary objective of well control in wireline operations?

a) Increase production rate

b) Maintain control of well pressure

c) Reduce equipment wear

d) Improve formation evaluation accuracy

Rationale: Maintaining control of well pressure prevents

uncontrolled flow or blowouts, ensuring safety and well integrity.

• What is the main cause of well kicks during wireline operations?

a) Excessive wireline tension

b) Overpull on lubricator

c) Insufficient well pressure control or improper barrier management 1 / 4

d) Use of incorrect grease head pressure

Rationale: Kicks occur when formation pressure exceeds surface

pressure due to inadequate barriers or pressure control.

• What is the function of a lubricator in wireline well control?

a) Measure formation pressure

b) Provide a pressure-tight housing for wireline tools

c) Act as a weight indicator

d) Store wireline tools between runs

Rationale: A lubricator allows safe insertion and retrieval of tools

under pressure while maintaining well control.

• What is the purpose of a grease head on a slickline or e-line pressure

control assembly?

a) To remove debris from the wireline

b) To form a dynamic seal around the wireline

c) To lubricate wireline sheaves

d) To cool the lubricator assembly

Rationale: A grease head provides a dynamic seal to prevent gas or

fluid escape while the line moves.

• / 4

• Which barrier is typically considered the primary well barrier during

wireline operations?

a) Lubricator

b) Wireline valve

c) Wellhead and downhole completion barrier

d) Pump seals

Rationale: The downhole completion barrier prevents uncontrolled

flow from the formation, serving as the primary barrier.

• What is the secondary barrier during pressurized wireline operations?

a) Tubing hanger

b) Wireline BOP and lubricator assembly

c) Flowline choke

d) Surface casing

Rationale: The wireline BOP and lubricator act as the secondary

containment barrier during surface pressure control.

• What is the function of a wireline BOP (blowout preventer)?

a) To increase wireline speed

b) To provide a seal against formation fluids

c) To close around the wireline and seal the well

d) To record pressure data 3 / 4

Rationale: The wireline BOP can close on the wireline to isolate the

well in case of loss of primary barrier.

• Which component provides a static seal when the wireline is not

moving?

a) Grease head

b) Packoff

c) Lubricator

d) Tool catcher

Rationale: A packoff seals around the stationary wireline, providing a

static pressure barrier.

• What type of wireline is most commonly used for electric line (E-line)

operations?

a) Single-conductor armored cable

b) Multi-strand braided line

c) Non-conductive slickline

d) Fiber-optic line

Rationale: E-line uses a single-conductor cable to transmit electric

signals to downhole tools.

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