NGWA questions with verified answers
2.31 Ans✓✓✓ Unit of energy constant to overcome gravity. Head
calculation 2.31 X 40psi = 92.4' of lift. 600' / 2.31 = 260psi
Air Rotary Drilling Ans✓✓✓ a method of rotary drilling that uses
compressed air as the circulating medium; compressed air at high
uphole velocity removes the cuttings
Air Surging Ans✓✓✓ Well Development method, involves injecting air
into the borehole such that aerated slugs of water are lifted irregularly
out the top of the well casing. Air pressure may be cycled on and off to
create a surging action desirable in well development. Sufficient air
pressure will result in a continuous flow of aerated water out the top of
the well, removing sediment and fine particles from the borehole.
Aquifer Ans✓✓✓ a geologic formation, group of formations, or part of
a formation that contains sufficient saturated permeable material to
yield economical quantities of water to wells and springs
Aquifer Test Ans✓✓✓ a test used to determine aquifer characteristics
performed by pumping a well for a period of time, with measured rates
of withdrawal, and observing the change in hydraulic head that occurs
in adjacent wells. An aquifer test may be used to determine degree of
hydraulic interconnection between different water-bearing units, as
well as the recharge rate of a well.
, Artesian Well Ans✓✓✓ a borehole in an aquifer where the
groundwater is confined under pressure and the water level rises above
the top of the water body it taps
Barite Ans✓✓✓ barium sulfate (BaSO4), a mineral used to increase the
weight of drilling fluid (mud); its specific gravity is 4.2
Bit Dressing (cable tool) Ans✓✓✓ to sharpen a dull cable tool bit. The
bit is heated (forged) and hammered to obtain the proper shape and
gauge, then reheated and hardened (tempered).
Cable Tool Bailors Ans✓✓✓ -Flat Bottom (Open bailer)
-Dart Valve (Valve Bailer)
-Sand Pump (double valve)
Cable tool drill string Ans✓✓✓ Socket, jars, stem, and drill bit.
Cathead Ans✓✓✓ Small spooled winch that draws works or hoisting
drum, to one side of the swivel head to wind line when breaking or
making up rod casing or pipe joints Slip Rope Drum
Chemical Well development Ans✓✓✓ Well Development method,
involves using approved chemicals, to breakup mud cakes, and flush
out gelled muds, used in conjunction with other methods. Chemical
treatment can be used to break down drilling fluids, clays and
2.31 Ans✓✓✓ Unit of energy constant to overcome gravity. Head
calculation 2.31 X 40psi = 92.4' of lift. 600' / 2.31 = 260psi
Air Rotary Drilling Ans✓✓✓ a method of rotary drilling that uses
compressed air as the circulating medium; compressed air at high
uphole velocity removes the cuttings
Air Surging Ans✓✓✓ Well Development method, involves injecting air
into the borehole such that aerated slugs of water are lifted irregularly
out the top of the well casing. Air pressure may be cycled on and off to
create a surging action desirable in well development. Sufficient air
pressure will result in a continuous flow of aerated water out the top of
the well, removing sediment and fine particles from the borehole.
Aquifer Ans✓✓✓ a geologic formation, group of formations, or part of
a formation that contains sufficient saturated permeable material to
yield economical quantities of water to wells and springs
Aquifer Test Ans✓✓✓ a test used to determine aquifer characteristics
performed by pumping a well for a period of time, with measured rates
of withdrawal, and observing the change in hydraulic head that occurs
in adjacent wells. An aquifer test may be used to determine degree of
hydraulic interconnection between different water-bearing units, as
well as the recharge rate of a well.
, Artesian Well Ans✓✓✓ a borehole in an aquifer where the
groundwater is confined under pressure and the water level rises above
the top of the water body it taps
Barite Ans✓✓✓ barium sulfate (BaSO4), a mineral used to increase the
weight of drilling fluid (mud); its specific gravity is 4.2
Bit Dressing (cable tool) Ans✓✓✓ to sharpen a dull cable tool bit. The
bit is heated (forged) and hammered to obtain the proper shape and
gauge, then reheated and hardened (tempered).
Cable Tool Bailors Ans✓✓✓ -Flat Bottom (Open bailer)
-Dart Valve (Valve Bailer)
-Sand Pump (double valve)
Cable tool drill string Ans✓✓✓ Socket, jars, stem, and drill bit.
Cathead Ans✓✓✓ Small spooled winch that draws works or hoisting
drum, to one side of the swivel head to wind line when breaking or
making up rod casing or pipe joints Slip Rope Drum
Chemical Well development Ans✓✓✓ Well Development method,
involves using approved chemicals, to breakup mud cakes, and flush
out gelled muds, used in conjunction with other methods. Chemical
treatment can be used to break down drilling fluids, clays and
