Description
P530 non-magnetic drill collar is a precision-engineered downhole tool made from P530 non-magnetic stainless steel, featuring low magnetic permeability, high mechanical strength, and excellent corrosion resistance.
It is an essential component in Measurement-While-Drilling (MWD) and Logging-While-Drilling (LWD) systems, ensuring accurate directional data by eliminating magnetic interference.
Key Benefits of P530 NMDC
P530 NMDC’s non-magnetic precision and magnetic permeability of ≤ 1.010 ensure accurate MWD/LWD measurements. Its high mechanical strength withstands high drilling loads and torsional stresses.
Resistant to corrosion and wear – Operates reliably in sour gas, saline mud, and high-pressure environments.
Meets API standards – Available with API NC and REG connections.
Tiptop also offers a variety of sizes, lengths, and wellbore diameters, providing customization options.
How the P530 Non-Magnetic Drill Collar Works
Magnetic Interference Isolation
Positioned above MWD/LWD tools, the P530 NMDC acts as a non-magnetic isolation section, preventing magnetic distortion caused by standard steel collars.
Rigid Structural Support
Provides weight on bit (WOB) and stiffness to maintain wellbore stability in vertical, directional, and horizontal drilling.
Instrument Protection
Shields precision electronics from vibration, impact, and drilling shock.
Technical Specifications
| Tool Joint | OD in |
Bore d in |
Length ft |
Bevel Diameter in±1/64 in |
BSR |
| NC23-31 | 3 1/8 | 1 1/4 | 30 | 3 | 2.57:1 |
| NC26-35 | 3 1/2 | 1 1/2 | 30 | 3 17/64 | 2.42:1 |
| NC35-41 | 4 1/8 | 2 | 30 or 31 | 3 61/64 | 2.43:1 |
| NC35-47 | 4 3/4 | 2 | 30 or 31 | 4 33/64 | 2.58:1 |
| NC38-50 | 5 | 2 1/4 | 30 or 31 | 4 49/64 | 2.38:1 |
| NC44-60 | 6 | 2 1/4 | 30 or 31 | 5 11/16 | 2.49:1 |
| NC44-60 | 6 | 2 13/16 | 30 or 31 | 5 11/16 | 2.84:1 |
| NC44-62 | 6 1/4 | 2 1/4 | 30 or 31 | 5 7/8 | 2.91:1 |
| NC46-62 | 6 1/4 | 2 13/16 | 30 or 31 | 5 29/32 | 2.63:1 |
| NC46-65 | 6 1/2 | 2 1/4 | 30 or 31 | 6 3/32 | 2.76:1 |
| NC46-65 | 6 1/2 | 2 13/16 | 30 or 31 | 6 3/32 | 3.05:1 |
| NC46-67 | 6 3/4 | 2 1/4 | 30 or 31 | 6 9/32 | 3.18:1 |
| NC50-70 | 7 | 2 1/4 | 30 or 31 | 6 31/64 | 2.54:1 |
| NC50-70 | 7 | 2 13/16 | 30 or 31 | 6 31/64 | 2.27:1 |
| NC50-72 | 7 1/4 | 2 13/16 | 30 or 31 | 6 43/64 | 3.12:1 |
| NC56-77 | 7 3/4 | 2 13/16 | 30 or 31 | 7 19/64 | 2.70:1 |
| NC56-80 | 8 | 2 13/16 | 30 or 31 | 7 31/64 | 3.02:1 |
| 6 5/8 REG | 8 1/4 | 2 13/16 | 30 or 31 | 7 45/64 | 2.93:1 |
| NC61-90 | 9 | 2 13/16 | 30 or 31 | 8 3/8 | 3.17:1 |
| 7 5/8 REG | 9 1/2 | 3 | 30 or 31 | 8 13/16 | 2.81:1 |
| NC70-97 | 9 3/4 | 3 | 30 or 31 | 9 5/32 | 2.57:1 |
| NC70-100 | 10 | 3 | 30 or 31 | 9 11/32 | 2.81:1 |
| 8 5/8 REG | 11 | 3 | 30 or 31 | 10 1/2 | 2.84:1 |
Chemical Composition of P530 Non-Magnetic Steel
| Grade | Chemical composition | |||||||
| C | Si | Mn | P | S | Cr | Ni | N | |
| P530 | Max0.05 | Max1.00 | 18-20 | Max0.03 | Max0.015 | 13-14 | Max2.00 | 0.25-0.40 |
High Cr and Ni levels deliver excellent corrosion resistance and low magnetic permeability.
Mechanical Properties
OD less than 4″
- Tensile strength Rm N/mm²: Min 900
- Yield Strength Rp N/mm²: Min 830
- Elongation A %: min 25%
- Reduction of area %: min 50%
- Impact energy %: min 122 J
- Hardness Brinell: 260-350
FROM 4″ TO 9 1/4″
- Tensile strength Rm N/mm²: Min 830
- Yield Strength Rp N/mm²: Min 760
- Elongation A %: min 25%
- Reduction of area %: min 50%
- Impact energy %: min 122 J
- Hardness Brinell: 260-350
Applications of P530 NMDC
Onshore & offshore oil and gas drilling
Directional and horizontal well drilling
MWD/LWD-equipped drilling programs
Sour gas and deep well environments
Ordering Information
We supply Various products in standard API sizes or as custom-engineered solutions.
Options include hardbanding, spiral grooving, and premium connection machining.
📞 Contact us today for a quote or technical consultation.
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