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NGWA - Study Guide - Air Rotary
2026/2027 Newest Exam With Complete Questions
And 100% Correct Detailed Answers|Already Graded
A+|Brand New!!
What purpose does a Kelly saver sub serve? - ANSWER-
A Kelly saver sub protects the Kelly from excessive wear
by absorbing the torque and stress during drilling
operations.
What type of lubrication system is used for DHH drilling? -
ANSWER-a mist or oil injection lubrication system to
reduce wear and cool the hammer mechanism.
Heavy steel casing would best be used in what rotary
process? - ANSWER-best used in the air rotary process
for stabilizing unconsolidated or collapsing formations.
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What air compressor checks must be made daily? -
ANSWER-Oil level
filters
belts
air pressure
leaks
What type of drill bit maintenance can be done in the field?
- ANSWER-Cleaning
inspecting for wear
sharpening teeth
replacing damaged parts
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Differential sticking of drill pipe can be prevented by what
methods? - ANSWER-Use higher mud flow
reduce drill string contact
maintain proper mud weight.
What common fishing tool are used in rotary drilling? -
ANSWER-Overshot
spear
fishing magnets
junk baskets
Regular maintenance of the rotary swivel consists of
what? - ANSWER-Lubrication, checking for leaks,
inspecting bearings, and replacing worn seals.
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What methods are used to clean the hole of cuttings in air
rotary drilling in unconsolidated formations? - ANSWER-
Airflow, foam injection, and polymer use.
How does air pressure change as the hole deepens? -
ANSWER-must increase as the hole deepens to maintain
effective cuttings removal.
What are the advantages and disadvantages of high
pressure air rotary drilling in unconsolidated formations? -
ANSWER-Advantages: Faster drilling, efficient cuttings
removal.
NGWA - Study Guide - Air Rotary
2026/2027 Newest Exam With Complete Questions
And 100% Correct Detailed Answers|Already Graded
A+|Brand New!!
What purpose does a Kelly saver sub serve? - ANSWER-
A Kelly saver sub protects the Kelly from excessive wear
by absorbing the torque and stress during drilling
operations.
What type of lubrication system is used for DHH drilling? -
ANSWER-a mist or oil injection lubrication system to
reduce wear and cool the hammer mechanism.
Heavy steel casing would best be used in what rotary
process? - ANSWER-best used in the air rotary process
for stabilizing unconsolidated or collapsing formations.
,2|Page
What air compressor checks must be made daily? -
ANSWER-Oil level
filters
belts
air pressure
leaks
What type of drill bit maintenance can be done in the field?
- ANSWER-Cleaning
inspecting for wear
sharpening teeth
replacing damaged parts
,3|Page
Differential sticking of drill pipe can be prevented by what
methods? - ANSWER-Use higher mud flow
reduce drill string contact
maintain proper mud weight.
What common fishing tool are used in rotary drilling? -
ANSWER-Overshot
spear
fishing magnets
junk baskets
Regular maintenance of the rotary swivel consists of
what? - ANSWER-Lubrication, checking for leaks,
inspecting bearings, and replacing worn seals.
, 4|Page
What methods are used to clean the hole of cuttings in air
rotary drilling in unconsolidated formations? - ANSWER-
Airflow, foam injection, and polymer use.
How does air pressure change as the hole deepens? -
ANSWER-must increase as the hole deepens to maintain
effective cuttings removal.
What are the advantages and disadvantages of high
pressure air rotary drilling in unconsolidated formations? -
ANSWER-Advantages: Faster drilling, efficient cuttings
removal.
