Complaint
| Drill Collar Specifications | |||||||
| Nominal Size | OD | ID | L mm | Bevel Diameter mm | Bending Strength Ratio | ||
| mm | in | mm | in | ||||
| NC31-41(2 7/8IF) | 104.8 | 41/8 | 50.8 | 2 | 9150 | 100.4 | 2.43:1 |
| NC35-47 | 120.7 | 43/4 | 50.8 | 2 | 9150 | 114.7 | 2.58:1 |
| NC38-50(3 1/2IF) | 127 | 5 | 57.2 | 21/4 | 9150 | 121 | 2.38:1 |
| NC44-60 | 152.4 | 6 | 57.2 | 21/4 | 9150 | 144.5 | 2.49:1 |
| NC44-60 | 152.4 | 6 | 71.4 | 2 13/16 | 9150/9450 | 144.5 | 2.84:1 |
| NC44-62 | 158.8 | 61/4 | 57.2 | 21/4 | 9150/9450 | 149.2 | 2.91:1 |
| NC46-62(4IF) | 158.8 | 61/4 | 71.4 | 2 13/16 | 9150/9450 | 150 | 2.63:1 |
| NC46-65(4IF) | 165.1 | 61/2 | 57.2 | 21/4 | 9150/9450 | 154.8 | 2.76:1 |
| NC46-65(4IF) | 165.1 | 61/2 | 71.4 | 213/16 | 9150/9450 | 154.8 | 3.05:1 |
| NC46-67(4IF) | 171.4 | 63/4 | 57.2 | 21/4 | 9150/9450 | 159.5 | 3.18:1 |
| NC50-67(4 1/2IF) | 171.4 | 63/4 | 71.4 | 213/16 | 9150/9450 | 159.5 | 2.37:11 |
| NC50-70(4 1/2IF) | 177.8 | 7 | 57.2 | 21/4 | 9150/9450 | 164.7 | 2.54:1 |
| NC50-70(4 1/2IF) | 177.8 | 7 | 71.4 | 2 13/16 | 9150/9450 | 164.7 | 2.73:1 |
| NC50-72(4 1/2IF) | 184.2 | 7 1/4 | 71.4 | 2 13/16 | 9150/9450 | 169.5 | 3.12:1 |
| NC56-77 | 196.8 | 7 3/4 | 71.4 | 2 13/16 | 9150/9450 | 185.3 | 2.70:1 |
| NC56-80 | 203.2 | 8 | 71.4 | 2 13/16 | 9150/9450 | 190.1 | 3.02:1 |
| 6 5/8REG | 209.6 | 8 1/4 | 71.4 | 213/16 | 9150/9450 | 195.7 | 2.93:1 |
| NC61-90 | 228.6 | 9 | 71.4 | 213/16 | 9150/9450 | 212.7 | 3.17:1 |
Hebei Ruishi Bits Manufacturing Co., Ltd. was established in 1990. It is engaged in diamond drill bit and drilling tool research and development, design and manufacture, sales and service of specialized companies. The company is located in Renqiu of Jizhong Plain, which is rich in oil resources. Renqiu is also the location of Huabei Oilfield.
The company has a number of experts experienced in diamond bit design of drilling technology, and is equipped with 5-axis machining center, NC lathes, NC sintering furnace, Ring sewing machine and other advanced production equipment. We are using domestic and foreign advanced professional design software, and doing continuous technological innovation and sustainable development. Ruishi owns full production lines of PDC bit and core bit, which is covering all sizes of the 2"--26" bit.
Ruishi has been promoting the comprehensive quality management and focus on the customer's demand. In order to ensure the stability of quality and the excellent performance of the bit, we strictly comply with the ISO9001 quality management system and ISO14001 environmental management system and OHSAS18001 Occupational health and safety management system in the enterprise operation, and strictly implement API Spec7-1 quality management standards in the process of production.
As the first grade supplier for Sinopec, CNPC and CNOOC, Ruishi's products are widely used in the Tarim, Tuha, Changqing, Dagang, Sichuan, Zhongyuan,Jidong, Huabei and other major oil fields. Ruishi has also established long-term strategic partnership with these oil fields. We have been highly recognized by the stability of excellent product quality and timely and thoughtful service. The company's products have been widely exported to North America, the Middle East, Russia and other countries and regions.
Why Choose Us?
1. 30 years rich experience in drill bits producing. Ruishi was founded in 1990.
2. Professional R & D team, offering OEM service.
3. Premium quality and favorable price. Reduce your comprehensive drilling cost.
4. API 7-1 & ISO9001 certificated.
5. Win highly prasied from our respected clients, reach deep cooperation with loyal customers domestics and abroad.
6. First grade supplier of Sinopec, CNPC and CNOOC for many years.
1.Q:What kind of packing do you have?
A:Plywood box or as your required.
2.Q:What is your price advantage?
A:We are 100% factory directly sales,API production process guarantee,Provide OEM services for you.
3.Q: Wonder if you accept small orders?
A: Yes, of course.
4.Q:Can you do OEM for me?
A:We accept all OEM orders,just contact us and give me your design.
5.Q:When can I get the quotation ?
A:We quote you ASAP after recieving your inquiry.
6.Q:Are you a manufacturer or trading company?
A: We are professional manufacturer.
7.Q: What kind of shippment method you provide?
A: By sea, air press or by train and other transports.
