| Customization: | Available |
|---|---|
| After-sales Service: | Yes |
| Warranty: | 1 Year |
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Drill collar is a bar made of solid steel, either common carbon steel or non-magnetic steel alloy. It is used in the drilling of oil wells for weighting drill bit, enabling it to drill through rock. Drill collar is the lowest element of a drill string. Our drill collars are manufactured strictly according to API standard.
1. Material: P550,P540,P530
2. Shape: It is the round pipe with smooth surface and thick wall, and the both ends are machined screw thread for connection.
3. Use: It is mainly used for the inspection in the process of petroleum drilling.
4. Standard: API Spec 7-1 or SY/T5144 Standard.
5. Inspection&Test: When producing, traceability are maintained from the receipt of raw material to completion of final products, and serial numbers are die-stamped on each workpiece body. During each manufacturing process, inspection and test are performed.
6. Magnetic permeability(MPS=1×105/4∏A/m)
1). Average: Ur<1.010.
2). Magnetic Field Gradient: ΔB≤0.05μT.
| Size | O.D(mm) | I.D.(mm) | Code | Thread | Length(mm) | Weight(kg) |
| 3-1/8 | 79.4 | 31.8(1-1/4) | NC23-31 | NC23 | 9140 | 298 |
| 3-1/2 | 88.9 | 38.1(1-1/2) | NC26-35 | NC26 | 9140 | 364 |
| 4-1/8 | 104.8 | 50.8(2) | NC31-41 | NC31 | 9140/9450 | 474/490 |
| 4-3/4 | 120.6 | 50.8(2) | NC35-47 | NC35 | 9140/9450 | 674/697 |
| 5 | 127 | 57.2(2-1/4) | NC38-50 | NC38 | 9140/9450 | 725/749 |
| 6 | 152.4 | 57.2(2-1/4) | NC44-60 | NC44 | 9140/9450 | 1125/1163 |
| 71.4(2-13/16) | NC44-60 | 9140/9450 | 1022/1056 | |||
| 6-1/4 | 158.8 | 57.2(2-1/4) | NC44-62 | NC44 | 9140/9450 | 1237/1279 |
| 71.4(2-13/16) | NC46-62 | 9140/9450 | 1134/1172 | |||
| 6-1/2 | 165.1 | 57.2(2-1/4) | NC46-65 | NC46 | 9140/9450 | 1352/1398 |
| 71.4(2-13/16) | NC46-65 | NC50 | 9140/9450 | 1249/1291 | ||
| 6-3/4 | 171.4 | 57.2(2-1/4) | NC46-67 | NC46 | 9140/9450 | 1471/1521 |
| 7 | 177.8 | 57.2(2-1/4) | NC50-70 | NC50 | 9140/9450 | 1597/1651 |
| 71.4(2-13/16) | NC50-70 | 9140/9450 | 1494/1545 |
Dongying Zhaoxin Industry and Trade Co.,Ltd is an ISO-9001, ISO-14001, ISO45001 certified company and has all the quality systems in place for design, planning,manufacturing and quality monitoring & traceability to ensure that Dongying Zhaoxin Industry and Trade Co.,Ltd products match the highest quality & reliability Standards similar to any International major in this field.
Dongying Zhaoxin Industry and Trade Co.,Ltd with perfect attitude, product and service, is going to make further development together with customers at home and abroad .
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