NGWA General Drilling Study Guide
Comprehensive Resource To Help You Ace 2026-2027 Exams
Includes Frequently Tested Questions With ELABORATED
100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!! Current Update!!
1. Define a water well. - Correct Answer: An excavation or structure
created in the ground by digging, driving, boring, or drilling to access
groundwater.
2. List all the parts of a cable tool drill string. - Correct Answer: Drill bit
Drill stem
Rope socket
Jars
Swivel
Fishing tools (when needed)
3. List all the parts on a rotary drill string. - Correct Answer: Drill bit
Drill pipe
Drill collar
Kelly (for traditional rotary rigs)
Stabilizers
Crossover subs
,Tool joints
Float valve (optional)
4. Name and describe 4 methods of developing a well. - Correct Answer:
Airlifting
Surging
Jetting
Bailing
5. List 3 types of bailers for cable tool drilling and the purpose for each. -
Correct Answer: Sand, valve, junk.
6. How do you dress a cable tool bit? - Correct Answer: Dressing a cable tool
bit involves reshaping and sharpening the bit to ensure effective drilling.
1. Inspection
2. Heating
3. Forging
4. Tempering
5. Final Sharpening
7. What type of maintenance is used on rotary bits? - Correct Answer:
Inspection
Cleaning
Lubrication
, Sharpening or Replacement
Monitoring Torque and Weight
8. What is a well screen? - Correct Answer: A well screen is a filtering device
placed at the bottom of a well, usually in the water-bearing formation, to allow
groundwater to enter the well while keeping out sediment, sand, and other fine
materials.
9. List the common types of fishing tools and explain how they are used. -
Correct Answer: Overshot
Spear
Fishing Magnet
Junk Basket
Impression Block
10. How is the screen sized in sand and gravel wells? - Correct Answer: Grain
Size Analysis
Slot Size Selection
Screen Length
11. Name the four cables on a cable tool rig and tell what they do. - Correct
Answer: Drilling Line (Mainline): This is the primary cable used to raise and lower
the drill string, which includes the drill bit, drill stem, and jars, into and out of the
wellbore.
Comprehensive Resource To Help You Ace 2026-2027 Exams
Includes Frequently Tested Questions With ELABORATED
100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!! Current Update!!
1. Define a water well. - Correct Answer: An excavation or structure
created in the ground by digging, driving, boring, or drilling to access
groundwater.
2. List all the parts of a cable tool drill string. - Correct Answer: Drill bit
Drill stem
Rope socket
Jars
Swivel
Fishing tools (when needed)
3. List all the parts on a rotary drill string. - Correct Answer: Drill bit
Drill pipe
Drill collar
Kelly (for traditional rotary rigs)
Stabilizers
Crossover subs
,Tool joints
Float valve (optional)
4. Name and describe 4 methods of developing a well. - Correct Answer:
Airlifting
Surging
Jetting
Bailing
5. List 3 types of bailers for cable tool drilling and the purpose for each. -
Correct Answer: Sand, valve, junk.
6. How do you dress a cable tool bit? - Correct Answer: Dressing a cable tool
bit involves reshaping and sharpening the bit to ensure effective drilling.
1. Inspection
2. Heating
3. Forging
4. Tempering
5. Final Sharpening
7. What type of maintenance is used on rotary bits? - Correct Answer:
Inspection
Cleaning
Lubrication
, Sharpening or Replacement
Monitoring Torque and Weight
8. What is a well screen? - Correct Answer: A well screen is a filtering device
placed at the bottom of a well, usually in the water-bearing formation, to allow
groundwater to enter the well while keeping out sediment, sand, and other fine
materials.
9. List the common types of fishing tools and explain how they are used. -
Correct Answer: Overshot
Spear
Fishing Magnet
Junk Basket
Impression Block
10. How is the screen sized in sand and gravel wells? - Correct Answer: Grain
Size Analysis
Slot Size Selection
Screen Length
11. Name the four cables on a cable tool rig and tell what they do. - Correct
Answer: Drilling Line (Mainline): This is the primary cable used to raise and lower
the drill string, which includes the drill bit, drill stem, and jars, into and out of the
wellbore.
