NGWA _ Groundwater & Well Construction Study
NGWA
Guide.pdf
_ Groundwater & Well Construction Study
NGWA
Guide.pdf
_ Groundwater & Well Construction Study Guide.pdf
NGWA | Groundwater & Well
Construction Study Guide
Guidehttps://www.stuvia.com/dashboard!@_)#*)(@$)($@*($@)($@*_
NGWA _ Groundwater & Well Construction Study
NGWA
Guide.pdf
_ Groundwater & Well Construction Study
NGWA
Guide.pdf
_ Groundwater & Well Construction Study Guide.pdf
,NGWA.pdf NGWA.pdf NGWA.pdf
National Groundwater Assocation
Water well defined Drilled, cored, bored, washed, dug, driven, jetted excavation,
constructed for extracting groundwater.
Cable tool drill string Socket, jars, stem, and drill bit.
Drill String Entire column of string or drill pipe,drill collars, and
accessories that transmit fluid and/or rotational power from
Kelly(top head drive) to the drill collars and bit.
Rotary Drill string Drill bit, Drill collar (stabilizer), Drill pipe, Kelly (top head)
NGWA.pdf NGWA.pdf NGWA.pdf
,NGWA.pdf NGWA.pdf NGWA.pdf
Porosity The percentage of void spaces or holes in geologic
formation. The amount of connected pore spaces
Barite barium sulfate (BaSO4), a mineral used to increase the weight
of drilling fluid (mud); its specific gravity is 4.2
Air Rotary Drilling a method of rotary drilling that uses compressed air as the
circulating medium; compressed air at high uphole velocity
removes the cuttings
Surfactants Improve flushing of cuttings from bit. Used in air-based
drilling to produce foam during well drilling, also well
development to disaggregate clays
2.31 Unit of energy constant to overcome gravity. Head calculation
2.31 X 40psi = 92.4' of lift. 600' / 2.31 = 260psi
NGWA.pdf NGWA.pdf NGWA.pdf
, NGWA.pdf NGWA.pdf NGWA.pdf
Well Development a procedure to facilitate the removal of fine solids and
materials from the water-bearing zone of a water well to
optimize production
Well Development Methods Chemical, Over pumping, Rawhiding (Washing and
backwashing), Mechanical Surging, Jetting, Air surging.
Over Pumping Well Development method; involves pumping well at a much
higher rate than it will be pumped during well evacuation or
sampling.
Rawhiding (washing and back washing) Well Development method, involves pumping water to the top
of the well then allowing it to flow back through the intake of
the pump, breaking up the bridge of sediments only around
the pump intake.
NGWA.pdf NGWA.pdf NGWA.pdf
NGWA
Guide.pdf
_ Groundwater & Well Construction Study
NGWA
Guide.pdf
_ Groundwater & Well Construction Study Guide.pdf
NGWA | Groundwater & Well
Construction Study Guide
Guidehttps://www.stuvia.com/dashboard!@_)#*)(@$)($@*($@)($@*_
NGWA _ Groundwater & Well Construction Study
NGWA
Guide.pdf
_ Groundwater & Well Construction Study
NGWA
Guide.pdf
_ Groundwater & Well Construction Study Guide.pdf
,NGWA.pdf NGWA.pdf NGWA.pdf
National Groundwater Assocation
Water well defined Drilled, cored, bored, washed, dug, driven, jetted excavation,
constructed for extracting groundwater.
Cable tool drill string Socket, jars, stem, and drill bit.
Drill String Entire column of string or drill pipe,drill collars, and
accessories that transmit fluid and/or rotational power from
Kelly(top head drive) to the drill collars and bit.
Rotary Drill string Drill bit, Drill collar (stabilizer), Drill pipe, Kelly (top head)
NGWA.pdf NGWA.pdf NGWA.pdf
,NGWA.pdf NGWA.pdf NGWA.pdf
Porosity The percentage of void spaces or holes in geologic
formation. The amount of connected pore spaces
Barite barium sulfate (BaSO4), a mineral used to increase the weight
of drilling fluid (mud); its specific gravity is 4.2
Air Rotary Drilling a method of rotary drilling that uses compressed air as the
circulating medium; compressed air at high uphole velocity
removes the cuttings
Surfactants Improve flushing of cuttings from bit. Used in air-based
drilling to produce foam during well drilling, also well
development to disaggregate clays
2.31 Unit of energy constant to overcome gravity. Head calculation
2.31 X 40psi = 92.4' of lift. 600' / 2.31 = 260psi
NGWA.pdf NGWA.pdf NGWA.pdf
, NGWA.pdf NGWA.pdf NGWA.pdf
Well Development a procedure to facilitate the removal of fine solids and
materials from the water-bearing zone of a water well to
optimize production
Well Development Methods Chemical, Over pumping, Rawhiding (Washing and
backwashing), Mechanical Surging, Jetting, Air surging.
Over Pumping Well Development method; involves pumping well at a much
higher rate than it will be pumped during well evacuation or
sampling.
Rawhiding (washing and back washing) Well Development method, involves pumping water to the top
of the well then allowing it to flow back through the intake of
the pump, breaking up the bridge of sediments only around
the pump intake.
NGWA.pdf NGWA.pdf NGWA.pdf
