Clean critical casing sections with up to three tools (scraper, brush, and mill) in one string
The SWITCHBACK SCRAPER versatile casing cleaning tool can be run as a part of the reservoir-section drilling BHA. Including one or up to multiple tools in a single string enables scraping, brushing, milling, or a combination of all three operations. For instance, the SWITCHBACK SCRAPER tool is ideal for cleaning critical casing sections on the trip out of the hole to begin running sand screens.
This tool is ideal for sand screen completions where, with one bit run left in openhole, a scraper or scrapers (or a combination of scraper, switchable mill, and switchable magnet) can be run in the drilling assembly. With the lowest tool spaced to reach the casing shoe as the bit reaches TD, a ball is dropped to activate the tool. The well is cleaned on pulling out of hole, whereupon sand screens can be run without the need for a dedicated clean-up run.
Other applications include:
preparing packer setting depths for lower completions