| After-sales Service: | 24/7 |
|---|---|
| Warranty: | 12 Months |
| Manufacturing Process: | Forging |
| Surface Treatment: | Spray-Paint |
| Operation Pressure: | Atmospheric Pressure |
| Material: | Alloy Steel |
| Customization: |
|---|
Suppliers with verified business licenses
Audited Supplier MWD NMDC(Nong magnetic Drill Collar)is used for setting MWD inside to make sure to keep accurate survey while drilling wells. We offer all sizes and diamerers of NMDC according to API 7-1 standard specifications, and even produce by your designs. Below are the details:
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. Usage: 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.
| Drill collar Number and Connection mm |
Outside Diameter mm |
Bore Diameter mm |
Length mm |
Bevel Diameter mm |
| NC31-41 | 104.8 | 50.8 | 9150 or 9450 | 100.4 |
| NC35-47 | 120.7 | 50.8 | 9150 or 9450 | 114.7 |
| NC38-50 | 127 | 57.2 | 9150 or 9450 | 121.0 |
| NC44-60 | 152.4 | 57.2 | 9150 or 9450 | 144.5 |
| NC44-60 | 152.4 | 71.4 | 9150 or 9450 | 144.5 |
| NC46-62 | 158.8 | 57.2 | 9150 or 9450 | 149.2 |
| NC46-62 | 158.8 | 71.4 | 9150 or 9450 | 150.0 |
| NC46-65 | 165.1 | 51.2 | 9150 or 9450 | 154.8 |
| NC46-65 | 165.1 | 71.4 | 9150 or 9450 | 154.8 |
Note. Customized sizes are also available upon your requests.
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Audited Supplier 
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