Groundwater Exploration Drilling - SUPRA International Indonesia - Capability Statement
SUPRA portfolio of well drilling, construction, completion, and maintenance services enables us to design comprehensive water well feasibility asessestment as asset and investation that reduce costs in the short and long term operational need. In all cases it is essential that the wells have the correct design in terms of location, depth, screen level, filter design and pumping system. If these aspects are not engineered to high standards then poorly performing and uneconomic wells may result. The well design planning includes the selection of suitable materials, the size of the components (diameter, wall thickness) and the size of the screen slot widths. In order to achieve the best and optimal design, we work very closely with our clients for ensuring well planned design for each clients. This is very important when it comes to construct wells of greater depth or diameter, since the larger the dimensions, the greater the use of materials, which increases the investment costs. We optimize the material specification and the investment cost needed by calculating the optimal screen placement, material combinations, and pump selection which require careful calculation. SUPRA drills using integrated method, according to national standards and take international standards into account with prior underground water study and exploration. It includes literature study, geophysics, geological survey and field mapping. SUPRA has drilled numerous wells for various purposes to clients’ satisfaction. During this time, SUPRA could, and still can, always benefit from its decades of experience and its knowledge of well drilling and construction. This enables the us to carry out drilling and completion professionally even in the most difficult project. As a leading nationwide water well drilling operator, we operate everywhere from Aceh to Nusa Tenggara Timur. We are providing state of the art services and partnering with our clients on managing the complexity, cost, and risk of water resources and supply to improve the competitiveness of our client business.
SUPRA portfolio of well drilling, construction, completion, and maintenance services enables us to design comprehensive water well feasibility asessestment as asset and investation that reduce costs in the short and long term operational need. In all cases it is essential that the wells have the correct design in terms of location, depth, screen level, filter design and pumping system. If these aspects are not engineered to high standards then poorly performing and uneconomic wells may result.
The well design planning includes the selection of suitable materials, the size of the components (diameter, wall thickness) and the size of the screen slot widths. In order to achieve the best and optimal design, we work very closely with our clients for ensuring well planned design for each clients. This is very important when it comes to construct wells of greater depth or diameter, since the larger the dimensions, the greater the use of materials, which increases the investment costs.
We optimize the material specification and the investment cost needed by calculating the optimal screen placement, material combinations, and pump selection which require careful calculation. SUPRA drills using integrated method, according to national standards and take international standards into account with prior underground water study and exploration. It includes literature study, geophysics, geological survey and field mapping.
SUPRA has drilled numerous wells for various purposes to clients’ satisfaction. During this time, SUPRA could, and still can, always benefit from its decades of experience and its knowledge of well drilling and construction. This enables the us to carry out drilling and completion professionally even in the most difficult project. As a leading nationwide water well drilling operator, we operate everywhere from Aceh to Nusa Tenggara Timur. We are providing state of the art services and partnering with our clients on managing the complexity, cost, and risk of water resources and supply to improve the competitiveness of our client business.
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Technical Memo
Capability Statement
Groundwater Exploration Drilling
SUPRA is striving to
achieve the best
result possible for
each and every
drilling project
Commercial water
well typically includes
industrial, irrigation,
and major water
supply well. The
major objective when
drilling a commercial
well is to ensure that
the formation
remains stable and
capable of being
pumped at the
maximum efficient
water yield. It is
important in
constructing a
commercial water
well that the longterm
stability and the
efficiency of the
operation are not
compromised by
imprudent cost
savings.
A drilled well co nsists of a hole
bored into the ground, with the
upp er part being lined with
casing. The casing pr events the
collapse of the bor ehole walls and
(grout seal) pr events surface or
sub surfac e co ntaminant s from
ent ering the water supply. The
casing also provides a housing for
a pumping mechanism and for
the pipe that moves water from
the pump to the surface. Drilled
wells ar e co nstruct ed by rotarydrilling
rig. Drilled wells that
penetrate unconsolidated
material require installation of
casing and a scr een to prev ent
inflow of sediment and collapse.
They can be drilled more than 300
meter s deep. The sp ace around
the casing must be sealed with
grouting mat erial of either neatFigure :Groundwater sustainability assessment with pumping test
cement or bentonite clay to
prevent co ntamination by water
draining from the surface
downward around the outside of
the casing.
Dep endi ng on the lithology, SUPR A carriesout all methods of drilling: the use of
direct rotary fl ush, air-lift, coring, or dow n the hole ha mmer drilling makes it
possible to adj ust to the pr evailing co nditions. This is possible only by using
modern, well-maintained drilling rigs and associat ed eq uipm ent and by having
responsible, sa fety-co nscio us employ ees for the company’s operations, ev en
when being confront ed wit h the mo st diffic ult co nditions. Our strong
commitment to innov ation is reflected in the technologies we broug ht to the
market throughout the year. By adopti ng technologies that addr ess sp eci fic
challenges, we enable our client s to ac hi eve their objectives mor e efficiently and
profitably.
Other important factors that must be co nsidered includ e: selecting a casing si ze
based on the desired or pot ential yield and the required pump si ze; selecting a
screen length appropriat e to the aq uifer thickness being scr eened; choo sing the
screen slot s si ze and grav el pack si ze based on analysi s of the gradatio n of the
aquifer materials; sel ecting a screen diamet er and lengt h that will transmit the
bore yield at low entrance velocities; selecting a large hol e diam eter; and
selecting gravel pack material that is well rounded and clean.
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