4/18/25, 1:22 AM NGWA - Study Guide - Air Rotary
NGWA Air Rotary Exam | Explore New 129
Questions and Answers | 2025 Update | 100%
Correct.
Correct
Incorrect
NGWA Air Rotary
129 Correct terms
Questions and answers
conditions?
,4/18/25, 1:22 AM NGWA - Study Guide - Air Rotary
Top head drive:
Advantages: Direct torque, better control, less drill string wear.
Disadvantages: More expensive, complex maintenance.
Table drive:
Advantages: Simpler, lower cost.
Disadvantages: Less control, higher drill string wear.
Lost circulation problems in rock formations are usually caused by
conditions such as high permeability, fractures or faults in the rock,
insufficient mud weight, and the presence of unstable formations.
Materials: Gravel, typically well-sorted and clean.
Methods: Gravity placement, tremie pipe, or reverse circulation to place gravel
uniformly around the well screen.
Don't know?
2 of 129
Term
Explain various methods for setting casing using air rotary
equipment.
Give this one a go later!
help collect cuttings for accurate formation logging by preventing loss of
samples during drilling, ensuring representative data.
,4/18/25, 1:22 AM NGWA - Study Guide - Air Rotary
High-pressure air rotary: Faster drilling, better cuttings removal, used in hard
formations.
Low-pressure air rotary: Slower drilling, more controlled, used in softer or
unstable formations.
Driving: Use a hammer or rig to drive the casing down.
Rotating: Rotate the casing into place using the drill rig.
Pushing: Use the rig's hydraulic system to push the casing down.
The casing string is grouted in mud rotary drilling of a rock well after it has been
set to provide a secure seal against fluid movement and to enhance well
integrity.
Don't know?
3 of 129
Term
Explain how pH can be affected by certain unconsolidated
formations.
Give this one a go later!
mineral grains mineral content
silica content protein content
, 4/18/25, 1:22 AM NGWA - Study Guide - Air Rotary
Don't know?
4 of 129
Term
Mist drilling is a name given to what technique in air rotary drilling?
Give this one a go later!
a method that relies solely on water a process that uses only air to drill
to enhance drilling performance. without any additional fluids.
a technique using a mix of air a technique that involves injecting
and small amounts of water or chemicals to increase drilling
foam to cool the bit and lift speed.
cuttings
Don't know?
5 of 129
Definition
Casing Elevators: Designed specifically for casing, these elevators
grip the casing using a latch mechanism, allowing for safe lifting and
lowering.
Slip Type Elevators: These have slips that engage with the casing to
provide a secure hold; they operate by applying weight on the slips
to grip the casing when lifted.
NGWA Air Rotary Exam | Explore New 129
Questions and Answers | 2025 Update | 100%
Correct.
Correct
Incorrect
NGWA Air Rotary
129 Correct terms
Questions and answers
conditions?
,4/18/25, 1:22 AM NGWA - Study Guide - Air Rotary
Top head drive:
Advantages: Direct torque, better control, less drill string wear.
Disadvantages: More expensive, complex maintenance.
Table drive:
Advantages: Simpler, lower cost.
Disadvantages: Less control, higher drill string wear.
Lost circulation problems in rock formations are usually caused by
conditions such as high permeability, fractures or faults in the rock,
insufficient mud weight, and the presence of unstable formations.
Materials: Gravel, typically well-sorted and clean.
Methods: Gravity placement, tremie pipe, or reverse circulation to place gravel
uniformly around the well screen.
Don't know?
2 of 129
Term
Explain various methods for setting casing using air rotary
equipment.
Give this one a go later!
help collect cuttings for accurate formation logging by preventing loss of
samples during drilling, ensuring representative data.
,4/18/25, 1:22 AM NGWA - Study Guide - Air Rotary
High-pressure air rotary: Faster drilling, better cuttings removal, used in hard
formations.
Low-pressure air rotary: Slower drilling, more controlled, used in softer or
unstable formations.
Driving: Use a hammer or rig to drive the casing down.
Rotating: Rotate the casing into place using the drill rig.
Pushing: Use the rig's hydraulic system to push the casing down.
The casing string is grouted in mud rotary drilling of a rock well after it has been
set to provide a secure seal against fluid movement and to enhance well
integrity.
Don't know?
3 of 129
Term
Explain how pH can be affected by certain unconsolidated
formations.
Give this one a go later!
mineral grains mineral content
silica content protein content
, 4/18/25, 1:22 AM NGWA - Study Guide - Air Rotary
Don't know?
4 of 129
Term
Mist drilling is a name given to what technique in air rotary drilling?
Give this one a go later!
a method that relies solely on water a process that uses only air to drill
to enhance drilling performance. without any additional fluids.
a technique using a mix of air a technique that involves injecting
and small amounts of water or chemicals to increase drilling
foam to cool the bit and lift speed.
cuttings
Don't know?
5 of 129
Definition
Casing Elevators: Designed specifically for casing, these elevators
grip the casing using a latch mechanism, allowing for safe lifting and
lowering.
Slip Type Elevators: These have slips that engage with the casing to
provide a secure hold; they operate by applying weight on the slips
to grip the casing when lifted.
