NGWA 2025 EXAM | 80 ACTUAL
QUESTIONS ANF ANSWERS
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1. National Ground-
Drilled, cored, bored, washed, dug, driven, jetted excava-
water Assocation
tion, constructed for extracting groundwater.
2. Water well de-
Socket, jars, stem, and drill bit.
fined
3. Cable tool drill
string
4. Drill String Entire column of string or drill pipe,drill collars, and ac-
cessories that transmit fluid and/or rotational power from Kelly(top head
drive) to the drill collars and bit.
5. Rotary Drill Drill bit, Drill collar (stabilizer), Drill pipe, Kelly (top head)
string
6. Porosity The percentage of void spaces or holes in geologic forma- tion. The
amount of connected pore spaces
7. Barite barium sulfate (BaSO4), a mineral used to increase the weight of
drilling fluid (mud); its specific gravity is 4.2
8. Air Rotary a method of rotary drilling that uses compressed air as the circulating
Drilling medium; compressed air at high uphole velocity removes the cuttings
9. Surfactants Improve flushing of cuttings from bit. Used in air-based drilling to
produce foam during well drilling, also well de- velopment to
disaggregate clays
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QUESTIONS ANF ANSWERS
|GRADED A+
written by
MBOFFIN
The Marketplace to Buy and Sell your Study Material
At Stuvia, you will find the best notes, summaries, flashcards & other study material. Search for your school or uni and find the
study material you need.
www.stuvia.com
Downloaded by: MBOFFIN | Want to earn $1.236
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1. National Ground-
Drilled, cored, bored, washed, dug, driven, jetted excava-
water Assocation
tion, constructed for extracting groundwater.
2. Water well de-
Socket, jars, stem, and drill bit.
fined
3. Cable tool drill
string
4. Drill String Entire column of string or drill pipe,drill collars, and ac-
cessories that transmit fluid and/or rotational power from Kelly(top head
drive) to the drill collars and bit.
5. Rotary Drill Drill bit, Drill collar (stabilizer), Drill pipe, Kelly (top head)
string
6. Porosity The percentage of void spaces or holes in geologic forma- tion. The
amount of connected pore spaces
7. Barite barium sulfate (BaSO4), a mineral used to increase the weight of
drilling fluid (mud); its specific gravity is 4.2
8. Air Rotary a method of rotary drilling that uses compressed air as the circulating
Drilling medium; compressed air at high uphole velocity removes the cuttings
9. Surfactants Improve flushing of cuttings from bit. Used in air-based drilling to
produce foam during well drilling, also well de- velopment to
disaggregate clays
Downloaded by: MBOFFIN | Want to earn $1.236
Distribution of this document is illegal extra per year?
