Exam A/B – Cable Tool Drilling (Practice
Exam) Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. What is the primary function of a cable tool drilling rig?
A. To rotate a drill bit continuously to cut rock
B. To pump drilling mud under high pressure
C. To raise and drop tools to crush and loosen formations
D. To melt rock using thermal energy
Correct Answer: C
Cable tool drilling relies on repeatedly lifting and dropping a heavy
tool string to mechanically break and pulverize the formation, rather
than rotating a bit or circulating drilling mud.
2. Which component of a cable tool rig supplies the vertical lifting
motion?
A. Rotary table
,B. Walking beam
C. Kelly
D. Mud pump
Correct Answer: B
The walking beam converts rotary motion from the power source into
an up-and-down motion that lifts and drops the drilling tools.
3. What is the primary purpose of the drilling bit in cable tool drilling?
A. To circulate drilling fluid
B. To cut formation by rotation
C. To crush and fracture formation by impact
D. To stabilize the borehole wall
Correct Answer: C
In cable tool drilling, the bit repeatedly strikes the formation, breaking
it by impact rather than by rotational cuFng.
4. Which tool is used to remove cuttings from the borehole?
A. Bailor
B. Reamer
,C. Drill collar
D. Stabilizer
Correct Answer: A
The bailor is a cylindrical tool designed to collect and remove loosened
cuFngs and debris from the bottom of the hole.
5. What material is most commonly used for the drilling line in cable
tool drilling?
A. Aluminum cable
B. Synthetic rope
C. Steel wire rope
D. Copper strand
Correct Answer: C
Steel wire rope provides the required strength, durability, and
resistance to wear for repeated lifting operations.
6. What is the main function of the jars in the tool string?
A. To rotate the bit
B. To deliver a sharp upward or downward удар (impact)
, C. To measure borehole depth
D. To pump fluid
Correct Answer: B
Jars store energy and release it suddenly, delivering an impact that
helps free stuck tools or enhance drilling effectiveness.
7. Which formation condition is cable tool drilling particularly well
suited for?
A. Very deep offshore wells
B. Soft, unconsolidated formations with high circulation losses
C. High-pressure directional wells
D. Horizontal shale wells
Correct Answer: B
Cable tool drilling performs well in shallow to moderate depths and in
formations where fluid circulation would be problematic.
8. What is the purpose of adding water to the borehole during
drilling?
A. To cool the drilling bit only
B. To increase drilling speed by lubrication
Exam) Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. What is the primary function of a cable tool drilling rig?
A. To rotate a drill bit continuously to cut rock
B. To pump drilling mud under high pressure
C. To raise and drop tools to crush and loosen formations
D. To melt rock using thermal energy
Correct Answer: C
Cable tool drilling relies on repeatedly lifting and dropping a heavy
tool string to mechanically break and pulverize the formation, rather
than rotating a bit or circulating drilling mud.
2. Which component of a cable tool rig supplies the vertical lifting
motion?
A. Rotary table
,B. Walking beam
C. Kelly
D. Mud pump
Correct Answer: B
The walking beam converts rotary motion from the power source into
an up-and-down motion that lifts and drops the drilling tools.
3. What is the primary purpose of the drilling bit in cable tool drilling?
A. To circulate drilling fluid
B. To cut formation by rotation
C. To crush and fracture formation by impact
D. To stabilize the borehole wall
Correct Answer: C
In cable tool drilling, the bit repeatedly strikes the formation, breaking
it by impact rather than by rotational cuFng.
4. Which tool is used to remove cuttings from the borehole?
A. Bailor
B. Reamer
,C. Drill collar
D. Stabilizer
Correct Answer: A
The bailor is a cylindrical tool designed to collect and remove loosened
cuFngs and debris from the bottom of the hole.
5. What material is most commonly used for the drilling line in cable
tool drilling?
A. Aluminum cable
B. Synthetic rope
C. Steel wire rope
D. Copper strand
Correct Answer: C
Steel wire rope provides the required strength, durability, and
resistance to wear for repeated lifting operations.
6. What is the main function of the jars in the tool string?
A. To rotate the bit
B. To deliver a sharp upward or downward удар (impact)
, C. To measure borehole depth
D. To pump fluid
Correct Answer: B
Jars store energy and release it suddenly, delivering an impact that
helps free stuck tools or enhance drilling effectiveness.
7. Which formation condition is cable tool drilling particularly well
suited for?
A. Very deep offshore wells
B. Soft, unconsolidated formations with high circulation losses
C. High-pressure directional wells
D. Horizontal shale wells
Correct Answer: B
Cable tool drilling performs well in shallow to moderate depths and in
formations where fluid circulation would be problematic.
8. What is the purpose of adding water to the borehole during
drilling?
A. To cool the drilling bit only
B. To increase drilling speed by lubrication
