Description
1. Introduction to TTMC-1 Non-Magnetic Drill Collar
TTMC-1 non-magnetic drill collar is a high-end drilling tool specifically developed for directional drilling in oil and gas as well as geological exploration. It is manufactured from high-quality non-magnetic stainless steel, with precise chemical composition control and refined through a forging process. It features extremely low magnetic permeability, high mechanical strength, and excellent corrosion resistance, making it an indispensable core component for precision directional drilling operations such as Measurement While Drilling (MWD) and Logging While Drilling (LWD).
2. Performance / Properties of TTMC‑1 Non‑Magnetic Drill Collar
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TTMC‑1 Non‑Magnetic Property Table |
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CHEMICAL ANALYSIS % |
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| C | Si | Mn | P | S | Cr | Ni | Mo | Cu | N | Re |
| ≤0.08 | ≤1.00 | 18.00~22.00 | ≤0.030 | ≤0.020 | 14.00~16.00 | 0.80~1.50 | 0.40~0.60 | ≤0.30 | 0.30~0.60 | 0.02 ~0.10 |
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Mechanical Properties (per ASTM A370, longitudinal sampling 1″ below surface) |
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| Outside Diameter | OD≤241.3mm(9 1/2″) | |||||||||
| Rm(Mpa)Tensile Strength | ≥827 | |||||||||
| Rp0.2(Mpa)Yield Strength | ≥758 | |||||||||
| A(%)Elongation | ≥25% | |||||||||
| Z(%)Reduction Of Area | ≥50 | |||||||||
| Akv2(J)Impact Value | ≥122 | |||||||||
| (HB)Brinell Hardness | ≥285~360 | |||||||||
| IGC | ASTM A262 | |||||||||
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MAGNETIC PROPERTY TEST AS PER ASTM A342 |
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| Field Gradient(μT) | ≤±0.05 μT | |||||||||
| Relative Permeability | < 1.010 | |||||||||
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Untrasonic test as per ASTM A388 or as per customer’s requirements.
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3. Standard Sizes (Dimensions) of TTMC‑1 Non‑Magnetic Drill Collar
| Connection Type | OD | ID | Length | ||
| mm | in | mm | in | (ft) | |
| NC23-31 | 79.4 | 3 1/8 | 31.8 | 1 1/2 | Available |
| NC26-35(2 3/8 IF) | 88.9 | 3 1/2 | 38.1 | 1 1/2 | From 10 to 31 ft |
| NC31-41(2 7/8 IF) | 104.8 | 4 1/8 | 50.8 | 2 | |
| NC35-47 | 120.6 | 4 3/4 | 50.8 | 2 | |
| NC38-50(31/2IF) | 127 | 5 | 57.2 | 2 1/4 | |
| NC44-60 | 152.4 | 6 | 57.2 | 2 1/4 | |
| NC44-60 | 152.4 | 6 | 71.4 | 2 13/16 | |
| NC44-62 | 158.8 | 6 1/4 | 57.2 | 2 1/4 | |
| NC44-62(4IF) | 158.8 | 6 1/2 | 71.4 | 2 13/16 | |
| NC44-65(4IF) | 165.1 | 6 1/2 | 57.2 | 2 1/4 | |
| NC44-65(4IF) | 165.1 | 6 1/2 | 71.4 | 2 13/16 | |
| NC44-67(4IF) | 171.4 | 6 3/4 | 57.2 | 2 1/4 | |
| NC50-672(41/2IF) | 171.4 | 6 3/4 | 71.4 | 2 13/16 | |
| NC50-70(41/2IF) | 177.8 | 7 | 57.2 | 2 1/4 | |
| NC50-70(41/2IF) | 177.8 | 7 | 71.4 | 2 13/16 | |
| NC50-72(41/2IF) | 184.2 | 7 1/4 | 71.4 | 2 13/16 | |
| NC56-77 | 196.8 | 7 3/4 | 71.4 | 2 13/16 | |
| NC56-80 | 203.2 | 8 | 71.4 | 2 13/16 | |
| 6 5/8 REG | 209.6 | 8 1/4 | 71.4 | 2 13/16 | |
| NC61-90 | 228.6 | 9 | 71.4 | 2 13/16 | |
| 7 5/8 REG | 241.3 | 9 1/2 | 76.2 | 3 | |
| NC70-97 | 247.6 | 9 3/4 | 76.2 | 3 | |
| NC70-100 | 254 | 10 | 76.2 | 3 | |
| 8 5/8 REG | 279.4 | 11 | 76.2 | 3 | |
| Note: 1. Small Dia & shorter length is available 2.Delivery status: Solid bar, Hollow bar, Finished Drill collar |
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4. Applications of TTMC‑1 Non‑Magnetic Drill Collar
4.1 Directional Drilling and Horizontal Wells
P530 non‑magnetic drill collars are widely used in directional drilling and horizontal well operations. In practical applications in the Sichuan shale gas block, the P530 drill collar, combined with the MWD system, successfully achieved precise steering over a horizontal section of 2,000 meters.
4.2 Offshore Deepwater Drilling
In a South China Sea deepwater drilling project, the anti‑whirl characteristics of the P530 non‑magnetic drill collar improved drill string stability by 40%, effectively avoiding measurement errors caused by downhole vibration.
4.3 Measurement While Drilling / Logging While Drilling (MWD/LWD)
The P530 non‑magnetic drill collar provides a magnetic‑interference‑free working environment for MWD/LWD instruments, ensuring the accuracy of real‑time downhole data transmission.
4.4 Geological Exploration and Coalbed Methane Development
Suitable for the extraction of oil, natural gas, and coalbed methane, as well as geological formation exploration.
5. Product Advantages of TTMC‑1 Non‑Magnetic Drill Collar Manufactured by TIPTOP
General Corrosion Resistance: Resistant To Weak Corrosive Media (Such As Air And Water Vapor) At Room Temperature, Widely Used In Household Products, Medical Equipment, Etc.
Low-Temperature Toughness: Can Be Used Stably In The Temperature Range Of -196°C To 800°C, Suitable For Low-Temperature Equipment Components.
Low-Carbon Anti-Granular Corrosion (304L): Carbon Content ≤ 0.03%, The Ability To Resist Intergranular Corrosion Is Significantly Improved After Welding, Suitable For Chemical And Petroleum Equipment
6. Why Choose TIPTOP
- Quality Assurance: We utilize internationally advanced forging equipment and a strict quality control system, ensuring full traceability from raw materials to finished products.
- Complete Range of Specifications: Available in various sizes such as Φ90–220mm, Φ100–300mm, Φ200–400mm, and more. We also support non‑standard customizations.
- In‑Stock Availability: We maintain substantial inventory to ensure short delivery lead times.
- Professional Technical Support: Our team of senior engineers provides product selection advice and technical assistance.
- Full Industry Chain Advantage: We have an integrated production chain covering smelting, forging, and precision machining.
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