• Model NO.：7 " & 9 5,8" & 13 3,8"
• OEM：Acceptable
• Transport Package：Wood Cases
• Specification：7 inch
• Trademark：zhongshi
• Origin：Henan, China
• Production Capacity：2000PCS,Month

Basic Info.

Model NO. 7 " & 9 5/8" & 13 3/8" OEM Acceptable Transport Package Wood Cases Specification 7 inch Trademark zhongshi Origin Henan, China Production Capacity 2000PCS/Month

Product Description

         double stage collars for oilfield  /API Hydraulic Stage Collars

The multi-stage cementing collar provides an effective, economical way to cement one or more specific casing intervals or to cement upper zone saft era lower zone has been cemented. The collar should be used with centralizers aboce and below and a cementing basket positioned below the ports. The operation of the collar is simple and reliable. It features a double locking mechanism consisting of a snapring lock and ball lock system to assure that the ports are permanently locked closed after cementing is completed. Internal parts are designed to lock to prevent rotation during drill out and are constructed of easily drillable materials.

API hydraulic stage collar

1.first-stage plug
2.closing plug
3.shut-off baffle

Features:
1.Opening pressure can be adjusted and it is not subjective to hole angle.
2.The pressure-relief design prevents fluid trapping and compression during the closing phase of the tool's operation.
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.

Technical Parameters:

 

Specification (in)	7 ² (Φ177.8 )
Opening Pressure (MPa)	16~18
Opening  Acting  Force (KN)	96~102
Closing Pressure (MPa)	5
Closing  Acting  Force (KN)	97
Sealing Capacity (MPa)	25
Rated Load (t)	180
Connection  thread	API 7 ²  BTC
Max .  OD. (mm) ))	208
Drill-out ID. (mm)	159 .4
Overall Length (mm)	930
Length  of first-stage plug  (mm)	320
Length  of Closing plug  (mm)	280