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DH-FJG Stage Collar
Time:2016/6/22 9:43:28 []Passengers

Application

 Excessive injection of cement at one shot.

 The formation cannot bear the gigantic fluid pressure.
 Pack off special strata.
 Avoid the occurrence of annual air channeling after the cementing job.
 The considerable temperature difference between the upper and lower section makes
it rather difficult to adjust the slurry performance.
 Two-stage cementing for deviated and horizontal wells
 
Feature
 The multi-stage cementing collar provides an effective, economical way to cement
one or more specific casing intervals or to cement upper zones after a lower zone
has been cemented.
 The collar should be used with centralizers above and below a cementing basket
positioned below the ports. The operation of the collar is simple and reliable.  
 Opening pressure can be adjusted and it is not subjective to hole angle.
 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.
 The inner seats are made of an easily drillability good rubber/ aluminum materials.
Both the opening and closing seats lock against rotation for easy drill-out.
 
Parameters

Size /in
5 1/2[Φ139.70]
7[Φ177.80]
Opening pressure
2465 psi(17MPa)
2300 psi(16MPa)
Opening force
23480 lbs(104KN)
23480 lbs(104KN)
Closing pressure
1200 psi(8MPa)
1200 psi(8MPa)
Closing force
27700 lbs(123KN)
45650 lbs(123KN)
  Sealing capacity
3600 psi(25Ma)
3600 psi(25Ma)
Rated load
463000 lbs(210t)
463000 lbs(210t)
Thread
API 5 1/2LCSG
API 7LCSG
Max OD
Φ6.625[Φ168.27]
Φ8.275[Φ210.19]
Drill-out ID
Φ4.810[Φ122.17]
Φ6.260[Φ159.00]

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