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Non-Magnetic Drill Collar
Non-Magnetic Drill Collar provides a non-magnetic environment for MWD and survey tools during directional drilling operations. It ensures accurate wellbore measurement and reliable drilling performance.
Category:
Downhole Tools
The Non-Magnetic Drill Collar (NMDC) is a critical component used in directional drilling Bottom Hole Assemblies (BHA). It provides a non-magnetic environment for sensitive downhole instruments such as MWD, LWD, and gyro survey tools, ensuring accurate directional measurements during drilling operations.
Manufactured from high-strength non-magnetic alloy steel, NMDCs minimize magnetic interference generated by conventional steel drill string components while maintaining excellent mechanical strength and torsional performance.
Unionlever OFS supplies both standard and customized non-magnetic drill collars suitable for vertical, directional, and horizontal drilling applications in demanding oilfield environments.
- Standard Non-Magnetic Drill Collars
- Spiral Non-Magnetic Drill Collars
- Slick Non-Magnetic Drill Collars
- MWD Housing Drill Collars
- Customized directional drilling configurations
- API and premium connection options
- Provides non-magnetic environment for MWD and survey tools
- High strength alloy material with excellent corrosion resistance
- Low magnetic permeability for precise directional measurements
- Designed for high torque and high load drilling conditions
- Compatible with standard API drilling connections
- Suitable for vertical, directional, and horizontal drilling
- Available in spiral and slick configurations
- Directional drilling operations
- Horizontal drilling projects
- MWD and LWD measurement systems
- Gyro survey drilling assemblies
- Extended reach drilling (ERD)
- Offshore and onshore drilling operations
| Parameter | Specification |
|---|---|
| Material | Non-Magnetic Alloy Steel |
| Magnetic Permeability | μr ≤ 1.01 |
| Yield Strength | ≥ 758 MPa |
| Hardness | 285 – 341 HB |
| Surface Treatment | Phosphate Coated |
| Connection Types | API REG / IF / NC connections |
| Available Type | Slick / Spiral |
- Raw material certification inspection
- Ultrasonic testing (UT)
- Magnetic permeability testing
- Dimensional inspection
- Thread gauge inspection
- Mechanical property testing
- Final inspection before shipment
Unionlever OFS can provide technical support and project-based configuration assistance for directional drilling applications, including connection recommendations, thread protection solutions, and export packing support.
- Technical consultation support
- Connection configuration assistance
- Thread protector supply
- Export packing and logistics support
To help us recommend the suitable Non-Magnetic Drill Collar configuration for your drilling project, please kindly provide the following information when sending your inquiry:
- Required OD and ID
- Connection type
- Slick or spiral type
- Length requirement
- MWD or survey tool compatibility
- Operating environment
- Quantity requirement
- Delivery destination and lead time
Request a Quote
For technical details, pricing, and project solutions, please contact: sales@unionlever.com
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Related Products
Building upon more than a decade of field experience, Unionlever OFS offers a comprehensive portfolio covering downhole drilling tools, fishing tools, handling tools, well control equipment, cementing tools, and solid-control systems.
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Unionlever Oilfield Equipment Co., Limited
A Member of
Unionlever International Group Limited
(Established Since 2010)
"To be a globally trusted leader in oilfield equipment and integrated supply solutions."
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