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Vertechs Applied Upper-Section Cementing Technology with Stage Collar Successfully on Unconventional Gas Well in Southwest China

In April, 2014, Vertechs completed the cementing operation successfully on the unconventional gas well in southwest China with the application of the new cementing technology with the use of stage cementing collar & external casing packer.

The well depth is 4727m, and in order to protect the main gas reservoir between 4500m and 4700m from the contamination of the cement slurry and meet the needs of the later multi-stage fracking, the casing tally with stage cementing collar & external casing packer is adopted for the production casing cementing. Upper section above the stage collar was cemented and lower section was left open hole.This cementing application is the first ever successful case on southwest unconventionalgas wells.