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The corrosion of
well casings or screens can cause holes to develop in a casing
and cause the screen slot size to increase, allowing sand,
fines and gravel pack to enter the well.
The Link-Pipe
internal repair sleeves, designed for rehabilitation of well
casings and screens, repairs holes, cracks and corrosion
damage.
For a successful installation story in Park Falls Wisconsin, please
click here.
For the original link please
click
here.
Benefits
of Link-Pipe Repair Products for Water Well Rehabilitation:
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Extends service life of the
well
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Reduces pump equipment cost
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Only
one crew is needed to perform inspection and repair
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Repair
Sleeve Installation takes approximately 0.5 to 1.5 hrs
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Minimum
diameter loss in the well casing
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Complete
control in locating the repair
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Repair
sleeves fit a wide range of well casing diameters
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Repair
Sleeves can be customized for a different
chemical environments
Products
| High
Pressure Filter-Sleeve™
is an internal repair
method, designed for rehabilitation of well casings,
designed for differential pressure up to 50 psi .
Repairs holes, cracks and corrosion damage. |
|
Advantages
Compared
with resin-sealed repair sleeves, dry Filter-Sleeve™ has
several advantages:
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No
time pressure for resin handling
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No
wait for resin to cure
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The
process is clean and dry and allows good control over
handling and installation
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Fast
application … 20 minutes to 1.5 hours depending on local
conditions: Accessibility, Depth, etc.
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Fast
return to service.
Technical
Data:
| Sleeve
O.D............................................................................... |
8"-30"* |
| Sleeve
Length.......................................................................... |
6”-36”* |
| Critical
buckling pressure (External hydraulic)............................ |
50
psi* |
| Water
Well diameter Reduction (Approx.).................................... |
1.25" |
*
Customization
is available on request.
Installation
Set Up:
Installation
Scheme:
1.Expandable perforated non-corrodible,
preferably stainless steel core equipped with a locking
mechanism. (The choice of core material is
determined by the chemical regime in the well.)
2.
Filter Material. After installation, infiltrating water is going through
filtration material and perforated sleeve.
In
time the fines and sand will clog the filter felt and
the design pressure comes slowly to the core.
3.
Damaged Area
4.
Casing
Installation
Process:
Water Well
ř
15.25” Repair with Link-Pipe High Pressure Filter-Sleeve
™
Repair
made by Hellema Holland Engineering
Ltda.
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Corrosion
damage at: _____________________________550
Ft. (166.65 m)
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The hole
size (approx):____________________________ 2”x3”
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Differential
pressure at the point of damage ___________50psi
|
|
Link-Pipe
High Pressure Filter- Sleeve
™ is placed on
the installation plug.
|
|
|
Insertion
Sleeve/Plug is ready
for insertion
|
|
|
Insertion
|
|
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On
the CCTV monitor the entire installation process
can be followed. |
|
|
Sleeve
is installed
Once
the sleeve is brought into repair position monitored by
the CCTV camera, the air/hydraulic pressure is
introduced and the sleeve is expanded. When full
installation pressure is reached the sleeve locks itself
in place. Air pressure is then released. |
|
|
Quality
Control Process
The
project is considered completed when:
- All damaged pipe is
covered with the SLEEVE
- All SLEEVE locks are
engaged
If
some locks are not engaged, insert the plug again, move
the plug to the unlocked end of the sleeve and apply 5-15
psi more pressure and repeat the installation. |
|
|
|
| Low
Pressure Sleeve™
is an internal repair method, designed for
rehabilitation of water mains and water wells with
differential pressure up to 5 psi. All
product components have individual NSF or FDA approval. |
Technical
Data:
| Sleeve
O.D............................................................................... |
8"-30"* |
| Sleeve
Length.......................................................................... |
6”-36”* |
| Critical
buckling pressure (External hydraulic)............................ |
5
psi |
| Water
Well diameter Reduction (Approx.).................................... |
1.25" |
*
Customization is available on request.
Installation
Scheme:
1.
Sleeve Structural Core equipped with locking mechanism
2.
Gasket saturated with resin
3.
Damaged Area
4.
Casing
Installation
Process:
Potable
Water Well ř
25” Repair with Link-Pipe Low Pressure Sleeve
™
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In this case
the existing corrosion is limited to a 2-sq. inch area in
the carbon steel casing above the stainless steel screen
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Damaged area
at 70’ depth
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Accuracy of
installation +/-1”
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Installation
time 20 min.
|
Video
survey
Existing corrosion is
limited to a 2-sq. inch area in the carbon steel.
Damaged area at 70’ depth |
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Resin
Application
The resin is worked
into sleeve's gasket. |
|
Sleeve/Plug
Assembly
The SLEEVE is placed on
the installation plug. |
|
Insertion
Sleeve/Plug is ready
for insertion |
|
Insertion
|
|
Sleeve
is installed and the plug removed.
Once
the sleeve is brought into repair position monitored by
the CCTV camera, the air/hydraulic pressure is
introduced and the sleeve is expanded. When full
installation pressure is reached the sleeve locks itself
in place and the resin behind the sleeve starts curing.
Air pressure is then released immediately and equipment
is retrieved. There is no need to hold the pressure
inside the sleeve while resin is curing, since the
sleeve is designed as a self curing repair device.
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