One-trip abandonment system reduces rig time, costs

Well abandonment can involve isolating and abandoning several sections of a well, resulting in a costly, time consuming process. Multiple cement plugs and numerous trips are required, and it is essential that the plug is set in clean casing. Coretrax, a UK-based specialist in wellbore clean-up and abandonment, has been working since 2009 to streamline this process by improving the way bridge plugs are installed during wellbore abandonment programs in the North Sea, having helped successfully abandon 84 wells between 2013 and 2015. ONE-TRIP ABANDONMENT SYSTEM The Coretrax one-trip abandonment system has reduced rig time, costs and the risk associated with additional trips. The system has been enabled through the use of four products: CX-2 bridge plug, CX-drillable brush, inflation support tool (IST) and the CX ball. The CX drillable brush is utilized to perform scraping to set the plug and cement in the same run, in a safe and efficient manner. The integration of a drillable brush (or sacrificial scraper), with the bridge plug, ensures clean casing to provide a solid base for a cement bond, reducing any micro-annulus. Furthermore, it ensures a clean area for plug setting.

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