1. Opening pressure can be adjusted and it is not affected by well deviation.
2. Circulation ports are opened by pumping. No fluid trapping and compression while opening and closing circulation ports.
3. The I.D.of upper/lower sub is the same as that of casing, but smaller than that of closing sleeve, which can minimize chances of damages to the closing sleeve.
4. The inner parts are made of an easily drillable rubber/aluminum material. Both the ope ning and closing seats have anti-rotation mechanism for easy drillout.
Specifications# mm (in.)
0139.7 (5-1/2 H)
Max O.D., mm
Drill-out I.D., MM
Overall Length, mm
Rated Load, t
Sealing capacity, Mpa
Opening Pressure, MPa
Lower Sliding Sleeve I.D., mm
Upper Sliding Sleeve I.D., Mm
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