DH-FJG Stage CollarApplication  • 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,Website:http://www.dhpetrotools.com, 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 /in5 1/2"[Φ139.70]7"[Φ177.80]Opening pressure2465 psi(17MPa)2300 psi(16MPa)Opening force23480 lbs(104KN)23480 lbs(104KN)Closing pressure1200 psi(8MPa)1200 psi(8MPa)Closing force27700 lbs(123KN)45650 lbs(123KN)Sealing capacity3600 psi(25Ma)3600 psi(25Ma)Rated load463000 lbs(210t)463000 lbs(210t)ThreadAPI 5 1/2"LCSGAPI 7"LCSGMax ODΦ6.625"[Φ168.27]Φ8.275"[Φ210.19]Drill-out IDΦ4.810"[Φ122.17]Φ6.260"[Φ159.00]