CHIMERA WELL-PRAETORIAN™

The CHIMERA WELL-PRAETORIAN™ is a heavy-duty wellbore filter and validation tool designed for all downhole conditions. It is typically used as part of a comprehensive wellbore clean-up bottom hole assembly (BHA), positioned above scraper and brush tools. The tool serves two main functions: wellbore cleaning and debris capture for validation.

While running into the hole, the WELL-PRAETORIAN™ either wipes or brushes the casing, depending on its configuration, while allowing fluid to bypass through the tool. When pulling out of the hole, wellbore fluid is diverted through a heavy-duty filter screen, capturing various types of well debris in a dedicated chamber. This feature allows for validation of the clean-up effectiveness when the tool is examined at the surface.

The tool can be equipped with either a standard-duty rubber wiper cup or a heavy-duty brush element, making it suitable for various applications, including heavy workover operations and high-temperature environments. Key features include a non-rotating centralizer with alloy bronze bearings for high-temperature and chemical compatibility, a shrouded filter screen to prevent accidental damage, and an innovative bypass valve that allows unhindered fluid bypass without jamming. For safety, an emergency bypass sleeve can shear to prevent swabbing.

The CHIMERA WELL-PRAETORIAN™ is available with all API and premium drill pipe connections, offering versatility in its deployment. Its robust design and multi-functional capabilities make it a valuable tool for efficient wellbore cleaning and debris management operations.