API 7-1 Non-Magnetic Drill Collar NC23 NC26 NC31 Thread - 79.4mm to 279.4mm OD, 9140mm Length
Price:
USD500-10000/pc
MOQ:
1 pc
Delivery Time:
30 work days
Product Description
API 7-1 Certified Non-Magnetic Drill Collars
Heavy-duty integral tools designed to concentrate weight onto drill bits for efficient rock breaking during oilfield drilling operations. Manufactured from AISI 4145H or modified steel for superior strength and durability.
Product Categories
- Slick Drill Collar: Provides essential bit weight while maintaining drill centralization and hole tracking through superior rigidity
- Spiral Drill Collar: Reduces contact area with borehole walls to prevent differential pressure sticking
- Spiral Drill Collar with Grooves: Features elevator and slip grooves for safe handling during tripping operations
- Non-Magnetic Drill Collar (NMDC): Cold-rolled finish enhances structural strength and resistance to stress, corrosion, and cracking
Technical Specifications
All drill collars comply with API Spec 7-1 dimensional requirements and include optional slip and elevator recesses for operational safety.
Standard Product Dimensions
| Size (in) | O.D (mm) | I.D. (mm) | Code | Thread | Length (mm) | Weight (kg) |
|---|---|---|---|---|---|---|
| 3 1/8 | 79.4 | 31.8 | NC23-31 | NC23 | 9140 | 298 |
| 3 1/2 | 88.9 | 38.1 | NC26-35 | NC26 | 9140 | 364 |
| 4 1/8 | 104.8 | 50.8 | NC31-41 | NC31 | 9140/9450 | 474/490 |
| 4 3/4 | 120.6 | 50.8 | NC35-47 | NC35 | 9140/9450 | 674/697 |
| 5 | 127 | 57.2 | NC38-50 | NC38 | 9140/9450 | 725/749 |
| 6 | 152.4 | 57.2 | NC44-60 | NC44 | 9140/9450 | 1125/1163 |
| 6 | 152.4 | 71.4 | NC44-60 | NC44 | 9140/9450 | 1022/1056 |
| 6 1/4 | 158.8 | 57.2 | NC44-62 | NC44 | 9140/9450 | 1237/1279 |
| 6 1/4 | 158.8 | 71.4 | NC46-62 | NC44 | 9140/9450 | 1134/1172 |
| 6 1/2 | 165.1 | 57.2 | NC46-65 | NC46 | 9140/9450 | 1352/1398 |
| 6 1/2 | 165.1 | 71.4 | NC46-65 | NC50 | 9140/9450 | 1249/1291 |
| 6 3/4 | 171.4 | 57.2 | NC46-67 | NC46 | 9140/9450 | 1471/1521 |
| 7 | 177.8 | 57.2 | NC50-70 | NC50 | 9140/9450 | 1597/1651 |
| 7 | 177.8 | 71.4 | NC50-70 | NC50 | 9140/9450 | 1494/1545 |
| 7 1/4 | 184.2 | 71.4 | NC50-72 | NC50 | 9140/9450 | 1625/1680 |
| 7 3/4 | 196.8 | 71.4 | NC56-77 | NC56 | 9140/9450 | 1895/1960 |
| 8 | 203.2 | 71.4 | NC56-80 | NC56/6-5/8REG | 9140/9450 | 2040/2109 |
| 8 1/4 | 209.6 | 71.4 | 6-5/8REG | 6-5/8REG | 9140/9450 | 2188/2263 |
| 9 | 228.6 | 71.4 | NC61-90 | NC61 | 9140/9450 | 2658/2748 |
| 9 1/2 | 241.3 | 76.2 | 7-5/8REG | 7-5/8REG | 9140/9450 | 2954/3054 |
| 9 3/4 | 247.6 | 76.2 | NC70-97 | NC70 | 9140/9450 | 3127/3234 |
| 10 | 254 | 76.2 | NC70-100 | NC70 | 9140/9450 | 3308/3421 |
| 11 | 279.4 | 76.2 | 8-5/8REG | 8-5/8REG | 9140/9450 | 4072/4210 |
Customization Available: Drill collars can be manufactured according to customer-specific design requirements.
Product Images
Packaging & Shipping
Contact Information
Company: Dongying OilMan Machinery Equipment Co.
Address: North Two Road, Dongying City, Shandong Province, China
Mobile/WhatsApp/WeChat: +86 13475294399
Email: christal@oilmancn.com
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Dongying Oilman Machinery Equipment Co.,Ltd.
Location
www.oilmanchina.com
Contact Person
Christal