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Water Well Drilling 101 for General Exam questions
with verified answers Graded A+
Well construction is comprised of the following componets? - (answer)drilling,
installation of casing, placing well screens, grouting, DEVELOPMENT
Minimum grouting distance? - (answer)10' is code
Artesian Well - (answer)Artesian pressure is the result of gravity and the confining
Aquifer
Artesian Well Layers - (answer)CONFINING Layer (top)
CONFINED AQUIFER (middle)
IMPERMEABLE Layer (bottom)
Types of drilling techniques - (answer)Cable tool, Air rotary, Mud rotary, Reverse
circulation rotary, Jetting & Driving
GROUTING - (answer)IS THE ACT OF INJECTING CERTAIN SUBSTANCES INTO VOID
SPACE TO REDUCE OR ELIMINATE THEIR PERMEABILITY, CONSOLIDATE OR
INCREASE THEIR STRENGTH.
(Filling space between the casing and bore hole with cement or clay)
Methods of Grouting include - (answer)Tremie pipe outside casing,
Tremie pipe inside casing,
, 2
Casing method or Halliburton method
Neat Cement Ratio - (answer)Cement and Water, 5.5 to 6gal of h20 to 1 cubic foot
of Portland cement with 3% bentonite to prevent shrinkage
Tremie Pipe Outside Casing - (answer)Grout placed through small pipe outside
casing,
Centering guides are placed along length of casing,
Lower end of casing has drillable plug,
Casing held down by rig so it doesn't float,
Shallow wells a positive displacement pump can be used.
Tremie Pipe Inside Casing - (answer)Grout Pipe installed temporarily inside casing,
Cement plug or float attached at the bottom of the casing,
Casing is filled with water and grout pumped through pipe,
Casing must be cleaned of all debris after grouting
Well Screens - (answer)Filtering device allowing water while holding back sand,
.006 TO .250
Important Screen Functions - (answer)EASILY DEVELOPED,
MINIMAL INCRUSTING TENDENCY,
Water Well Drilling 101 for General Exam questions
with verified answers Graded A+
Well construction is comprised of the following componets? - (answer)drilling,
installation of casing, placing well screens, grouting, DEVELOPMENT
Minimum grouting distance? - (answer)10' is code
Artesian Well - (answer)Artesian pressure is the result of gravity and the confining
Aquifer
Artesian Well Layers - (answer)CONFINING Layer (top)
CONFINED AQUIFER (middle)
IMPERMEABLE Layer (bottom)
Types of drilling techniques - (answer)Cable tool, Air rotary, Mud rotary, Reverse
circulation rotary, Jetting & Driving
GROUTING - (answer)IS THE ACT OF INJECTING CERTAIN SUBSTANCES INTO VOID
SPACE TO REDUCE OR ELIMINATE THEIR PERMEABILITY, CONSOLIDATE OR
INCREASE THEIR STRENGTH.
(Filling space between the casing and bore hole with cement or clay)
Methods of Grouting include - (answer)Tremie pipe outside casing,
Tremie pipe inside casing,
, 2
Casing method or Halliburton method
Neat Cement Ratio - (answer)Cement and Water, 5.5 to 6gal of h20 to 1 cubic foot
of Portland cement with 3% bentonite to prevent shrinkage
Tremie Pipe Outside Casing - (answer)Grout placed through small pipe outside
casing,
Centering guides are placed along length of casing,
Lower end of casing has drillable plug,
Casing held down by rig so it doesn't float,
Shallow wells a positive displacement pump can be used.
Tremie Pipe Inside Casing - (answer)Grout Pipe installed temporarily inside casing,
Cement plug or float attached at the bottom of the casing,
Casing is filled with water and grout pumped through pipe,
Casing must be cleaned of all debris after grouting
Well Screens - (answer)Filtering device allowing water while holding back sand,
.006 TO .250
Important Screen Functions - (answer)EASILY DEVELOPED,
MINIMAL INCRUSTING TENDENCY,
