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Home > Drill collars > 30 ft Drill Rig Tools API 7-1 Spiral Shape Non Magnetic Drill Collar for Oil Field Equipment
30 ft Drill Rig Tools API 7-1 Spiral Shape Non Magnetic Drill Collar for Oil Field Equipment
30 ft Drill Rig Tools API 7-1 Spiral Shape Non Magnetic Drill Collar for Oil Field Equipment
30 ft Drill Rig Tools API 7-1 Spiral Shape Non Magnetic Drill Collar for Oil Field Equipment
30 ft Drill Rig Tools API 7-1 Spiral Shape Non Magnetic Drill Collar for Oil Field Equipment
30 ft Drill Rig Tools API 7-1 Spiral Shape Non Magnetic Drill Collar for Oil Field Equipment
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30 ft Drill Rig Tools API 7-1 Spiral Shape Non Magnetic Drill Collar for Oil Field Equipment
30 ft Drill Rig Tools API 7-1 Spiral Shape Non Magnetic Drill Collar for Oil Field Equipment
30 ft Drill Rig Tools API 7-1 Spiral Shape Non Magnetic Drill Collar for Oil Field Equipment
30 ft Drill Rig Tools API 7-1 Spiral Shape Non Magnetic Drill Collar for Oil Field Equipment
30 ft Drill Rig Tools API 7-1 Spiral Shape Non Magnetic Drill Collar for Oil Field Equipment

30 ft Drill Rig Tools API 7-1 Spiral Shape Non Magnetic Drill Collar for Oil Field Equipment

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Product Description

API 7-1 Non-Magnetic Spiral Drill Collar
Our non-magnetic spiral drill collars are essential rig tools specifically engineered for precision in oil field equipment applications, meeting the rigorous API 7-1 specifications.
Drill Collar Thread Outside Diameter (D) Inside Diameter (d) Length L (mm) Ledge Chamfer Df (mm) Bending Strength Ratio
mm in mm in
NC31-41(2 7/8IF)104.84 1/850.829150100.42.43:1
NC35-47120.74 3/450.829150114.72.58:1
NC38-50(3 1/2IF)127.0557.22 1/49150121.02.38:1
NC44-60152.4657.22 1/49150/9450144.52.49:1
NC44-62158.86 1/457.22 1/49150/9450149.22.91:1
NC46-62(4IF)158.86 1/471.42 13/169150/9450150.02.63:1
NC46-65(4IF)165.16 1/271.42 13/169150/9450154.83.05:1
NC46-67(4IF)171.46 3/457.22 1/49150/9450159.53.18:1
NC50-70(4 1/2IF)177.8771.42 13/169150/9450164.72.73:1
NC50-72(4 1/2IF)184.27 1/471.42 13/169150/9450169.53.12:1
NC56-80203.2871.42 13/169150/9450190.13.02:1
NC61-90228.6971.42 13/169150/9450212.73.17:1
Technical Features & Specifications
Premium Materials Manufactured from AISI 4145H modified steel, supplied in "as rolled" finish with alternative finishes available.
Heat Treatment Full-length processes ensure properties exceed API Spec 7-1. Hardness range: 285-341 Brinell.
Strict Traceability Complete material and process tracking from raw mill receipt to finished product via stamped serial numbers.
Rigid Inspection Comprehensive visual dimensional checks and ultrasonic inspections over the entire tool body.
Cold Rolling Thread roots and elevator recesses are cold-rolled to increase fatigue life and minimize crack initiation.
Protective Coating Phosphate-coated or copper plating applied to all connections to enhance corrosion resistance.
Spiral Drill Collar
Rig Tool Equipment
Workshop & Related Products
Manufacturing Workshop
Related Oil Field Tools
Frequently Asked Questions
Do you provide OEM services for drill rig tools?
Some specific items accept OEM services. Please contact our support team for detailed information regarding your requirements.
What is the standard delivery time?
Generally, the delivery time for sample orders is 3-7 days. We prioritize swift delivery while maintaining strict guaranteed quality standards.
Which payment methods are accepted?
We accept Trade Assurance, L/C, T/T, Western Union, and Escrow. We are open to discussing other convenient payment options.
What is the recommended mode of transport?
For large orders, we recommend sea freight. For smaller orders, air courier is usually better. We respect and accommodate your preferred logistics choices.
What manufacturing standards do your drill collars meet?
All our drill collars are manufactured and inspected in strict compliance with API Spec 7-1 standards, ensuring high performance in oil field environments.
Are your drill collars treated for corrosion resistance?
Yes, all connections are either phosphate-coated or copper-plated to significantly improve resistance to corrosion and wear.

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