Non-Magnetic Heavy Weight Drill Pipe: Precision Wellbore Surveying Without Compromise
The Magnetic Interference Challenge
Conventional drill pipes distort critical surveying data:
-Azimuth errors >3° in high-latitude wells
-Total field distortion exceeding MWD tool compensation limits
-Well collision risks due to inaccurate trajectory data
Our solution delivers:
✅ <1.005 μ magnetic permeability (10x lower than standard pipes)
✅ ISO 10407-2 survey-grade accuracy
✅ Zero recalibration runs between sections
Engineered for Surveying Precision
Patent-Pending Material Science
Property | Conventional NM Pipe | Our Innovation |
Magnetic Permeability | 1.05-1.10 μ | ≤1.005 μ |
Yield Strength | 120-135 ksi | 155 ksi min |
Corrosion Resistance | PREN 28-32 | PREN 38-42 |
→ Low-carbon stainless steel forged under controlled atmosphere
→ Full-length quench & temper for uniform magnetic properties
Technical Specifications
Parameter | Specification |
Size Range | 3-1/2" to 6-5/8" OD |
Length | 9.5m/31ft standard (custom 8-12m) |
Connections | API NC31-NC50, 4-1/2" FH-6-5/8" FH |
Special Threads | Double-shoulder, VAM, TMK |
Pressure Rating | 15,000 psi internal / 10,000 psi external |
Compliance | API Spec 7-1, SY/T5144, ISO 10407-2 |
Manufacturing Excellence
✅ Cold Rolled Threads
40% longer fatigue life vs. cut threads
ATP thread inspection on every joint
✅ Double-Shoulder Design
200% higher torsional strength
Leak-proof seal to 15,000 psi
✅ Full-Body Hardbanding
Tungsten carbide matrix (HRC 65-68)
Casing wear reduction ≥70%
Field Performance Data
North Sea HPHT Wells: Zero magnetic interference at 185°C
Arctic Drilling: Azimuth accuracy ±0.1° at 85° inclination
Ultra-Deepwater: 12,000+ hours without degradation
Sour Gas Applications: NACE MR0175 compliant for H₂S service
Why Precision Matters
For MWD/LWD Systems:
Guarantees <0.5° azimuth error in 3D well paths
Enables 1.5m collision avoidance separation
Supports magnetic ranging for SAGD well pairs
For Drilling Engineers:
Eliminates dedicated non-magnetic drill collar (NMDC) strings
Reduces survey uncertainty factor by 4x
Enables GPS-level accuracy at 10,000ft TVD
