CHIMERA NR-MAG™

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Robust non-rotating wellbore clean-up magnet for removing ferrous debris

Page last modified
September 3 2025

The CHIMERA NR-MAG™ is a robust, non-rotating wellbore clean-up magnet designed for effective removal of ferrous metal debris from wellbores in various downhole conditions. It can be run independently or as part of a comprehensive wellbore clean-up bottom hole assembly (BHA), typically positioned above casing scrapers and brushes to complement their hard scraping action.

The tool features a non-rotating NR-MAG™ sleeve with interchangeable centralizers that guide and center it within the casing while allowing extended rotation without wear. The external ribbed design incorporates integral rare earth magnets arranged to create defined flow paths for well fluids, capturing ferrous debris as it passes through. These magnetized ribs also prevent collected debris from being dislodged during circulation or tripping.

Key features include high-performance alloy bronze bearings with both axial and radial elements, enabling extended rotation in harsh environments without damaging the tool or casing. The tool's robust design and large debris capacity make it suitable for various applications, including pre-completion clean-ups, workovers, sidetracking, abandonment, and drilling/milling cement plugs.

The CHIMERA NR-MAG™ is available in different sizes to accommodate various casing weights and can be fitted with standard or high-temperature magnet inserts. Its design allows for interchangeability with UNI-BLADE™ scrapers and CHIMERA BRUSH™ tools, enhancing its versatility in wellbore clean-up operations.

Pros & Limitations
1
Effectively removes ferrous metal debris from the wellbore
1
Can be run alone or as part of a comprehensive wellbore clean-up BHA
1
Non-rotating design prevents tool and casing wear during extended rotation
1
Complements hard scraping action to remove rust and ferrous debris
1
Large debris capacity allows for efficient clean-up operations
1
Suitable for all downhole conditions
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Prevents debris-related premature packer setting while running in hole
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Prepares casing wall to ensure proper packer element setting
1
Mitigates risk during completion operations
1
Improves well productivity by ensuring a clean wellbore
Specification
Title Description
Theme/Discipline
Well ConstructionWell OperationsWell Plug and Abandonment
Core Tech
Hardware Tool
Nominal OD
7.000 in, 9.625 in
Weight
23.0 - 38.0 ppf, 36.0 - 64.9 ppf
Connection
NC 38, NC 50
Centralizer OD
5.790 - 6.054 in, 8.120 - 8.594 in
ID
1.50 in, 2.50 in
Length
101.4 in, 103.8 in
Tensile Yield
523,200 lbs, 927,000 lbs
Torsional Yield
28,600 ft.lbs, 59,800 ft.lbs
Max Slack-Off
10,000 lbs, 20,000 lbs
Burst/Collapse
>10,000 psi, >10,000 psi
Max Rotation
120 rpm, 120 rpm
Technology Readiness Level

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[9/9]

Development Technology demonstration Mature / Proven
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Reactive Downhole Tools is a well-established provider of high-performance swellable isolation technology for the global oil and gas industry. The company has evolved to offer bespoke open and cased hole completion systems, with a focus on providing quick turnaround solutions across the entire wellbore. Reactive prides itself on designing, delivering, and implementing customized solutions rather than relying on catalog selections. Founded in April 2012, the company has expanded its operations globally, with offices and manufacturing facilities in the UK, USA, and UAE. Reactive's product range includes the Reflex® and CHIMERA™ lines, which cater to various wellbore needs such as completions, workover, clean-up, construction, and intervention. With a strong emphasis on research and development, Reactive Downhole Tools aims to provide innovative and tailored solutions for the most challenging downhole environments.

Country of Headquarters
United Kingdom

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