In deepwater and extended-reach wells, good system hydraulics are important for providing maximum annular velocity needed to prevent debris from settling on the low side of the hole. Historical data indicates that as much as 30% of nonproductive time during completions is the result of debris left in the wellbore. Wellbore cleaning systems are used to reduce nonproductive time by effectively removing that debris. A new system of deepwater wellbore cleanup tools has been developed, which features high torque and tensile ratings, new bearing technology for high rotation speeds, and bigger flow areas.

New scraper and brush configurations are more durable and provide an improved method to clean the casing. A new magnet configuration can capture and retain a larger volume of debris. Additionally, a new filter configuration improves the ability to capture and filter debris. Multiple operations can be performed on a single run, thereby further reducing rig time. This is accomplished by running several high-performance tools that can scrape and brush the casing ID, collect and remove debris from the well, filter the wellbore fluid, and displace drilling fluids with completion fluids. These tool enhancements, which are implemented in this new suite of tools, improve reliability, reduce operational risk, and allow the tools to operate more efficiently as a system.

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