Home > Products > OCTG(oil country tubular goods) > API SPEC. 7-1 Downhole Integral Spiral Steel Drill Collar, Non-magnetic Drill Collar in Oil Field with High Quality
API SPEC. 7-1 Downhole Integral Spiral Steel Drill Collar, Non-magnetic Drill Collar in Oil Field with High Quality
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Product Details
| Brand Name | APS | Model Number | Integral spiral drill collar | |
| Type | Drill Collar | Machine Type | Drilling Tool | |
| Certification | API | Material | Other, Alloy steel, Non-magnetic | |
| Processing Type | Forging | Use | Well Drilling |
Product Description
API SPEC. 7-1 Downhole Integral Spiral Steel Drill Collar, Non-magnetic Drill Collar in Oil Field with High Quality
Drill collar is basic component which provides weight on the bit for drilling and keeps the drill sting in tension. Drill collar is manufactured from 4145H modified quenched and tempered steel, strict metallurgical specifications are followed to insure that full length heat treating produces a consistent maximum depth of hardness.
* Slick Drill Collar: provide weight to drill bit so that drill pipe is in tension. Especially the drill collar can keep centralizing for drill bit and hole track by large rigidity.
* Spiral Drill Collar: reduce contact area with hole so as to avoid efficiently bit sticking from diffirential pressure.
* Non-magnetic Drill Collar: as cold rolled finish on both ID and OD surface with unique technical process strengthen the structure and ensures the tools with optimal resistance to stress, corrosion, cracking and the mechanical performance is greatly enhanced.
1. Material AISI 4145H, 4145HMod, Non-Magnetic Drill Collar
OD+4mm | Connection | ID+1.59mm | Length±152.4mm | Chamfering Diameter ±0.4mm | Length of one spiral ±25.4mm |
79.4 | NC23 | 31.8 | 9140 or 9450 | 76.2 | 679 |
88.9 | NC26 | 38.1 | 9140 or 9450 | 82.9 | 679 |
104.8 | NC31 | 50.8 | 9140 or 9450 | 100.4 | 914 |
114.3 | NC31 | 50.8 | 9140 or 9450 | 100.4 | 914 |
120.6 | NC35 | 50.8 | 9140 or 9450 | 114.7 | 965 |
127 | NC38 | 57.2 | 9140 or 9450 | 121 | 965 |
139.7 | NC40 | 57.2 | 9140 or 9450 | 132.2 | 1067 |
158.8 | NC46 | 71.4 | 9140 or 9450 | 144.5 | 1067 |
168.3 | NC50 | 71.4 | 9140 or 9450 | 154.8 | 1168 |
177.8 | NC50 | 71.4 | 9140 or 9450 | 164.7 | 1168 |
196.8 | NC50/NC56 | 71.4 | 9140 or 9450 | 185.3 | 1626 |
203.2 | NC56/6 5/8REG | 71.4 | 9140 or 9450 | 190.1 | 1727 |
209.6 | 6 5/8REG | 71.4 | 9140 or 9450 | 195.6 | 1727 |
215.9 | 6 5/8REG | 71.4 | 9140 or 9450 | 195.6 | 1727 |
228.6 | 6 5/8REG | 71.4 | 9140 or 9450 | 212.7 | 1829 |
241.3 | 7 5/8REG | 76.2 | 9140 or 9450 | 223.8 | 1829 |
254 | 7 5/8REG/8 5/8REG | 76.2 | 9140 or 9450 | 237.3 | 1930 |
279.4 | 8 5/8REG | 76.2 | 9140v9450 | 266.7 | 2032 |
2. Non-Magnetic Drill Collar Mechanical Property
Fishing Neck OD | Yield Strength Rf(MPa) | Tensile Strength Rm(MPa) | Elongation Ali(%) | Reduction of Area (%) | Impact Value (Joule) | Hardness HB |
3 1/2”-6 7/8” | ≥758 | ≥827 | ≥18 | ≥45 | ≥81J(RT) | 285~341 |
7”-11” | ≥689 | ≥758 | ≥20 | ≥45 | ≥81J(RT) | 285~341 |
* relative permeability: μ(Gauss/Oersted)<1.010
* magnetic fieldgradient: Max. Deviation of the Magnetic field in the inner hole to uniform magnetic field: ≤±0.05μT
* intergranular corrosion(Anti corrosion): as per ASTM A262E for intergranular corrosion test.
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- Shaanxi APS Machinery Equipment Co., Ltd.
- Contact nameKaren yan Chat Now
- Phone86-029-63350698
- AddressRoom 11911, Shuzishenghuo Building A, Keji 5th Road, High-Tech Zone
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