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v wire wedge wire screen Johnson screen wedge wire screen pipe
which has it's own characters:
Area open to flow=6% to 8% for 12 spf, 0.75" EH (assumes all perfs open),
4% open area in base pipe
Skin--1 to 5
Adavantages of v wire wedge wire screen Johnson screen wedge wire screen pipe
Low cost than full sand control routine completion
Zone and water control
Disadavantages
Sand restrained only by choke
low reliability in many cases
low inflow area
Why to choose v wire wedge wire screen Johnson screen wedge wire screen pipe
the special wedge shape wire and rods to make of the well screen as the above drawing.
and the specifications of the wedge wire screens:
How to find proper screen dimensions and correct slot sizes of the wedge wire screens
Diameter, Specific capacity and available drawdown indicate the productivity of a well to be expected.
If the pump is installed above the screen the rising velocity at the screen head should not exceed v = 1.75 meter/sec.
If the pump is installed below the screen in a pump sump then the screen diameter depends mainly on the pump size and the remaining annulus space between the screen and the riser pipe.
Screen length, once decided on the screen diameter the laminar flow conditions at the entrance of the screen determine the requested length. Screen length in the total height of a water bearing formation is - especially when using the con-slot screen - not necessary. The Kozeny concept of investigation for partial penetrated formation is an excellent practice to determine max. Necessary screen length.
Package and Delivery
Each with bubble bags and then in wooden case.
Each case is clearly marked with:
1.Batch number
2.Date of manufacture
3.Safe heating & application temperature
Transported by sea
Any needs, please feel free to contact me.
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