4 1 2 stage cementing collar

... and features 1-It can only manufactured by SWS in domestic china as one unique tech. 2- It can be used in horizontal and highly deviated well bores and applications where opening of the stage collar after displacement of the first stage cementing is...

... Collar Description: The multi-stage cementing collar provides an effective, economical way to cement one or more specific casing intervals or to cement upper zone after a lower zone has been cemented. The collar should be used with centralizers above...

...Stage Cement Collar Hydraulic stage collar meets the challenges of cementing holes at any angle with a hydraulically opened port system,the opening pressure of the stage collar can be adjusted at rig site to meet well requirements, providing operational flexibility. API Hydraulic Double Stage Cement Collar Features Hydraulic stage collar meets the challenges of cementing......