The casing wall scraper is used to remove mud or cement sheath, rust, mill scale, paraffin, and similar substances from the casing inner diameter (ID). This is especially important in precompletion stages where tight tolerance equipment will be run.
The casing wall scraper's standard operating mode is in the nonrotating position. The 360° coverage blades and stabilizers remain stationary while the drillpipe can be rotated for long periods during circulation to clean the wellbore.
The casing wall scraper is designed with ample circulation area to allow for high-rate circulation and bypass of debris.