wedge wire borescreens-faq
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For Those , who want to Achieve a Hole lot more
FrequentlyAsked Questions
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Wedge –WireBore Screens
Stainless SteelWire Wedge
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Frequently Asked Questions & Answers for
Wedge –wire Bore Screens
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FrequentlyAsked Questions
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Question 1 -
What is a Water Bore Screen?
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Answer 1 -
A water bore screen is usually a round pipe with perforations in it to allow water to enter into the center for pumping or bore testing, and keeping out sand or other ground conditions
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Question 2 -
Advantages of a Quality Manufactured Screen?
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Answer 2 -
Stops sand from entering in the pump
Limits pump damage
Higher bore efficiency
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Answer 2 – cont.
Higher flow of water for pumping
Less maintenance
Longer life of bore
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Question 3 -
What types of Screens are available ?
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Answer 3 -
There are basically four types
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1- Slotted Casing
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2- Wire Mesh
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3 – Perforated Punched sheet metal
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4 – Wedge Wire Screens
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Question 4 -
What is the most common Borescreen ?
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Answer 4 -In its standard formation, is made from UPVC pressure pipe and is slotted with horizontally around the pipe, standard slotting is 0.8mm wide slots with 10mm between the slots and between 3 and 8 rows around the pipe.
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Bore Casing & Screens Pipes & Components Environmental Drilling Water Treatment Safety Products Sand Spears Pumps
Question 5 -
What type of screen can Deps manufacture?
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Answer 5 -
We slot casing nearly every day
Manufacture punched sheet metal or tube
Supply- wedge wire & mesh Screen
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Bore Casing & Screens Pipes & Components Environmental Drilling Water Treatment Safety Products Sand Spears Pumps
Question 6 -
What size pipe can we slot?
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Answer 6 -
Your screen can be from 15mm dia. To 630 mm dia
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Question 7 -
What slotting pattern can we do?
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Answer 7 -
With our computerized and manual slotting machines we can slot to your requirements.
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Bore Casing & Screens Pipes & Components Environmental Drilling Water Treatment Safety Products Sand Spears Pumps
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FrequentlyAsked Questions
Bore Casing & Screens Pipes & Components Environmental Drilling Water Treatment Safety Products Sand Spears Pumps
Question 8 -
What slot sizes are available ?
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Answer 8 -
0.2 – 12mm
Std. 0.2, 0.4, 0.8, 1.0, 1.2, 1.6, 2.0, 2.2, 3.0
Other slot sizes can be catered for.
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Question 9 -
What type of pipe can we slot ?
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Answer 9 –
We can slot -
Pressure pipe,
Poly Pipe,
HDPE Pipe,
Drainpipe,
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Answer 9 - Stormwater,
Black Max,
Storm Pro,
Recycled pipe, etc.
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Question 10 -
What materials can we slot?
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Answer 10 -
We can slot,Upvc, MPVC, Abs, Poly , HDPE Pipe,
Fiberglass, Steel, Gal and Stainless pipe
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We can slot, Upvc, MPVC, Abs, Poly , HDPE Pipe, Fiberglass, Steel, Gal and Stainless pipe
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Bore Casing & Screens Pipes & Components Environmental Drilling Water Treatment Safety Products Sand Spears Pumps
Question 11 -
What length of screen are available?
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Bore Casing & Screens Pipes & Components Environmental Drilling Water Treatment Safety Products Sand Spears Pumps
Answer 11 -
Any length of screen is available or we can slot only a section of the pipe.
Std length of most pipes is 6m
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Bore Casing & Screens Pipes & Components Environmental Drilling Water Treatment Safety Products Sand Spears Pumps
Question 12 -
What alternatives are there for slots ?
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Answer 12 -
Holes, Perforations, Horizontal slots
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Bore Casing & Screens Pipes & Components Environmental Drilling Water Treatment Safety Products Sand Spears Pumps
Question 13 -
What slot size do I need ?
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Answer 13 -
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This critical design component is based around allowing 40-60% of the aquifer sand or gravel to enter the bore for removal during development.
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Bore Casing & Screens Pipes & Components Environmental Drilling Water Treatment Safety Products Sand Spears Pumps
Question 14 -
What is the open area of a screen ?
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Bore Casing & Screens Pipes & Components Environmental Drilling Water Treatment Safety Products Sand Spears Pumps
Answer 14 -
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This is the ratio of the slot open area per length of screen as a percentage
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Bore Casing & Screens Pipes & Components Environmental Drilling Water Treatment Safety Products Sand Spears Pumps
Question 15 -
Why is the open area so important ?
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Answer 15 -
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This dictates to, how many slots and rows needed, length of the screen to have and what flow is achievable
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Bore Casing & Screens Pipes & Components Environmental Drilling Water Treatment Safety Products Sand Spears Pumps
Question 16 -
What is my open percentage of the screen I am using ?
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Answer 16 -
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We can calculate this for you, or you can go to our website and use our calculator that we designed for you.?http://www.deps.com.au/screen-open-area-calculator/
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Question 17 -
Will I get enough water through my screen ?
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Answer 17 -
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The standard entrance velocity for a Borescreen is 1.83m/minute.To check the maximum flow through your screen go to
http://deps.com.au/data-sheet-hidden-menu/open-area-slotted-pvc
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Answer 17 -
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or send us your details and we will calculate it for you.
PS, A Calculator will be coming soon.
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Question 18 -
Slotted Screen or Wedge wire screen ?
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Answer 18 -
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A wedge wire screen can have a much larger open area than a slotted bore screen andhas a stronger construction method.
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Answer 18 -
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Slotted casing screen can have a max of approximately 24%.
Wedge wire screen can have over 50% open area, allowing a much greater flow.
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Answer 18 -
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Slotted casing screens are a much cheaper alternative.
Wedge Wire due to construction can be set at a much greater depth.
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Question 19 -
How to join my screen to the casing ?
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Answer 19 -
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The main method is to use a solvent welded coupling glued to the casing.If the casing is threaded then a female thread is attached or machined in one end of the screen.Or
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Answer 19 -
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If the screen is to be telescoped in the bore a K-packer is attached to the top of the screen.
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Question 20 -
Do I need a sump on my Borescreen ?
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Answer 20 -
A sump is used to catch any fines that may enter the screen over a period of time and instead of blocking the screen it just fills the sump.
A good idea if a pump is to be fitted into the bore.
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Question 21 -
Are they called by any other name ?
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Answer 21 -
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Bore Screen
Borescreen
Filter pack
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Answer 21 -
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Johnson Screen
Lowering spears
Machine slotted screens
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Answer 21 -
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Monitoring screen
Perforated or punched screens
Piezometer
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Answer 21 -
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Pvc screen
PVC slotted Pipe
Sand screen
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Answer 21 -
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Sand Screens
Sand spear
Screen
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Answer 21 -
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Screened casing
Slotted casing
Slotted pipe
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Answer 21 -
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Standpipe piezometer
Spear Points
Water Bore screens
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Answer 21 -
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Water spear
Wedge wire screens
Well points
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Answer 21 -
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Well screens
Wire mesh screens
Wire wrapped screen
Wrapped wire screens
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Bore Casing & Screens Pipes & Components Environmental Drilling Water Treatment Safety Products Sand Spears Pumps
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Thank you for taking the time to look at the information we have created for you,We hope this will be of assistance to solving your piping, drainage , cleaning and drilling challenges.
If you have any more questionsPlease feel free to contact myself or one of our team
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• For more Information
• go to www.deps.com.au
• 0r contact us on
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