What is a non-magnetic drill collar?

A thick-wall austenitic stainless steel collar in the bottom hole assembly that houses MWD and LWD tools. Its relative magnetic permeability stays below 1.005, shielding the instruments from the steel drill string's magnetic field so directional and horizontal surveys stay accurate. SHUNFU forges every collar from high-purity P530 or P550 steel and verifies permeability on each bar before delivery.

Which grade should I choose?

We supply P530, P550, P580 and P750 in slick, spiral and flex designs to API Spec 7-1. P530 is the standard Mn-Cr-N steel for routine directional wells. P550 adds chromium and nitrogen, giving roughly 140 ksi minimum yield and better pitting resistance for deeper, sour or high-pressure wells. Share your well profile and our engineers will recommend the right grade, size and connection.

What quality standards does the manufacturer follow?

All products are manufactured under a Quality Assurance System compliant with ISO 9001.

P550 P530 Non-Magnetic Drill Collar for Mwd Directional Drilling API Spec 7-1

Name: P550 P530 Non-Magnetic Drill Collar for Mwd Directional Drilling API Spec 7-1
Brand: Hunan Shunfu Metal Material Co., Ltd.
SKU: 2327126365

Hunan, ChinaHunan Shunfu Metal Material Co., Ltd.

US$2,300.00

1-9 Tons

US$2,200.00

10-24 Tons

US$2,100.00

25+ Tons

Sample price:US$50.00/kg.Request sample

Product profile

Customization

Available

Warranty

Technical/Sample/Quality

Manufacturing Process

Forging

Model NO.

P550 / P530

Surface Treatment

Painted

Operation Pressure

Atmospheric Pressure

Material

Alloy

Applications

Across Oil and Gas, Horizontal and Extended-Reach

Length

up to 40 FT

Delivery Condition

Solution-Annealed, Forged

Surface Condition

Painted (Black), Phosphated, or Bare Machined

Design

Slick, Spiral or Flex Profile, with Spiraling

Transport Package

Standard

Specification

3 1/8" - 11"

Trademark

SHUNFU

Origin

China

Production Capacity

100000 Tons Per Year

Key features

Zero Magnetic Interference: permeability 1.005 max keeps MWD and LWD readings precise in any well.

High Strength Alloys: Available in P530, P550, P580, and P750 grades with superior mechanical properties.

Corrosion Resistance: Enhanced chromium and nitrogen content provides resistance to pitting and stress corrosion.

Longer Run Life: shot-peened ID resists stress-corrosion cracking in H2S and sour-gas service.

P550 Grade 140 ksi: extra nitrogen and chromium add strength and pitting resistance beyond P530.

API Spec Compliance: Manufactured to meet API Spec 7-1 standards for drill string tools.

ISO 9001 Certified: Full quality assurance system with continual audits and state-of-the-art lab testing.

Custom Cutting Service: Stocking and sales of solid NM material cut to length at customer request.

Company profile

Fast DeliveryLow MOQExperienced Team

Hunan Shunfu Metal Material Co., Ltd.

Hunan, China

CertifiedBusiness Type: Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples CertifiedExport Year: 7 years CertifiedNearest Port: shanghai portAverage Response Time: ≤15h

AI-Powered supplier vetting

SummaryHunan Shunfu Metal Material Co., Ltd. is a limited company supplying steel pipe, with 24 employees and stated annual output of 100,000 tons of oil steel products. It provides OEM and ODM services and can customize from samples or designs, but it does not provide 3D software design, has no SDK, and launched no new products in the past year. Export sales represent 71%–90% of total sales, with Southeast Asia and the Middle East identified as primary markets; however, it reports no overseas showroom, agents, branches, or offline trade-show participation. Lead time is one month in both peak and off-peak seasons. The available audit record identifies SGS as the auditor, but the stated audit result is 0 and no certification is identified. Quality and service governance evidence is weak because written procedures or records are absent for supplier approval, corrective actions, complaint handling, and service assessment. Financial records are referenced for 2021–2023, but their actual performance is not provided.

Supplier typeThe supplier is identified as Hunan Shunfu Metal Material Co., Ltd., a limited company with 24 employees whose primary and offered product is steel pipe. It is not part of a larger company group, and its stated business scope includes permitted company operations and import/export activities.

After-Sales capabilityThe supplier has no overseas showroom, agents, branches, or reported offline trade-show participation. It also has no written procedures or records for customer complaints, corrective and preventive actions, or service-capability assessment, indicating limited documented after-sales infrastructure.

R&D capabilityThe supplier is described as a professional technical supplier and offers ODM services, but it has only one year of total R&D engineer experience, no SDK, no 3D software design service, and no new products launched in the past year. These stated limitations demonstrate a deficiency in innovation resources and recent product development.

Production capacityThe supplier reports annual production of 100,000 tons of oil steel products, with one-month lead times in both peak and off-peak seasons. Its product scope is steel pipe, and the stated production information supports established manufacturing capacity, although the slices do not provide independent verification of output or quality performance.

Customization capabilityThe supplier explicitly provides customization from samples and designs, along with OEM and ODM services. This supports both customer-specified product adaptation and design-manufacturing cooperation, although 3D software design and SDK support are unavailable.

Product Q&A

Q:What materials are used for the Non Magnetic Drill Collars?

They are made from high purity austenitic stainless steel with grades P530, P530 HS, P550, P580, and P750.

Q:Can the collars be customized to specific designs?

Yes, they are manufactured to the customers specification and design, including custom cutting to length.

Q:Are the collars suitable for H2S environments?

Yes, the non-mag material ID is treated with shot peening to prevent stress corrosion in H2S environments.

Q:What is the Minimum Order Quantity?

The Minimum Order Quantity is 1 Ton.

Q:What sizes and testing are provided?

Sizes range from 3-1/8 inch to 11 inch OD, cut to any length, with standard or custom API rotary-shouldered connections. Each collar is tested for chemistry, tensile, impact, hardness, ultrasonic soundness and magnetic permeability, and ships with full mill certificates under our ISO 9001 system. Shot-peened IDs are available for sour-gas service.