Description
P550 non-magnetic drill collars are made from specially formulated high-nitrogen austenitic manganese-chromium steel, ensuring an ultra-low magnetic permeability (≤ 1.005) to protect sensitive MWD and LWD tools from magnetic interference. This precision-engineered drill collar offers exceptional strength and durability, making it an ideal choice for directional drilling and complex wellbore trajectories.
That every P550 drill collar undergoes rigorous magnetic and ultrasonic testing to meet the highest quality standards. With exceptional corrosion resistance and fatigue strength, P550 drill collars provide reliable wellbore stability and protect your downhole tools, helping you drill confidently and accurately in the harshest environments.
About Our P550 Non-Magnetic Drill Collar
P550 Non-Magnetic Drill Collar, a integral downhole device designed for MWD and LWD applications. Manufactured from a specialised non-magnetic austenitic Mn-Cr metal alloy with excessive nitrogen, this collar successfully eliminates magnetic interference, making sure exceptionally correct directional measurements.
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 P550
P550″ is a special nonmagnetic, austenitic Mn-Cr-steel with a high nitrogen content.
| C | Mn | Cr | Mo | N | Ni |
| Max.0,06 | 20,50-21,60 | 18,30-20,00 | Min.0,50 | Min.0,60 | Min.1,40 |
Mechanical Properties
Following mechanical properties (tested at room temperature) are achieved by a special cold-working process over the full length of the collar:
| Yield Strength (min.): | OD up to 9 1/4″ | 140 ksi | 965 N/mm² |
| 0,2%-offset method | OD 9 1/2″ and larger | 130 ksi | 900 N/mm² |
| Tensile Strength (min.): | 150 ksi | 1035 N/mm² | |
| Elongation (min.): | 20% | 20% | |
| Reduction of area (min.): | 50% | 50% | |
| Impact energy (min.): | 60 ft.lb | 82 J | |
| Endurance Strength / N=105 (min.): | ± 80 ksi | ± 550 N/mm² | |
| Hardness Brinell: | 350-430 HB | 350-430 HB | |
Corrosion Resistance and Quality Assurance
P550 collars undergo advanced surface treatments to prevent transgranular and intergranular stress corrosion cracking. Each collar is:
- 100% magnetically inspected using Förster Magnetomat 1.782 (“hot spot” test)
- 100% ultrasonically inspected per ASTM E 114 standards
- guarantee full compliance with API and customer-specific quality standards.
Why Choose P550 Non-Magnetic Drill Collar?
- Enhanced measurement accuracy in MWD/LWD applications
- Outstanding strength and durability for demanding drilling environments
- Comprehensive testing and traceability for total quality assurance
- Customizable specifications to suit your project needs
- Reliable protection for sensitive downhole electronics and wellbore stability
Contact Us
If you want to learn more about P550 Non-Magnetic Drill Collar or request a custom quote, please contact us today. At Tiptop, we are committed to delivering the highest quality drill collars to support your drilling success
Reviews
There are no reviews yet.