| specification | Outside diameter(mm) | Inside diameter(mm) | designation | Screw thread | Length(mm) | Step chamfer diameter | Bending strength ratio |
| 3-1/8 | 79.4 | 31.8(1-1/4) | NC23-31 | NC23 | 9140 | 76.2 | 2.57:1 |
| 3-1/2 | 88.9 | 38.1(1-1/2) | NC26-35 | NC26 | 9140 | 82.9 | 2.42:1 |
| 4-1/8 | 104.8 | 50.8(2) | NC31-41 | NC31 | 9140/9150 | 100.4 | 2.43:1 |
| 4-3/4 | 120.6 | 50.8(2) | NC35-47 | NC35 | 9140/9150 | 114.7 | 2.58:1 |
| 5 | 127.0 | 57.2(2-1/4) | NC38-50 | NC38 | 9140/9150 | 121 | 2.38:1 |
| 6 | 152.4 | 57.2(2-1/4) | NC44-60 | NC44 | 9140/9150 | 144.5 | 2.49:1 |
| 71.4(2-13/16) | NC44-60 | 9140/9150 | 144.5 | 2.84:1 | |||
| 6-1/4 | 158.8 | 57.2(2-1/4) | NC44-62 | NC44 | 9140/9150 | 149.2 | 2.91:1 |
| 71.4(2-13/16) | NC44-62 | 9140/9150 | 150 | 2.63:1 | |||
| 6-1/2 | 165.1 | 57.2(2-1/4) | NC46-65 | NC46 | 9140/9150 | 154.8 | 2.76:1 |
| 71.4(2-13/16) | NC46-65 | NC50 | 9140/9150 | 154.8 | 3.05:1 | ||
| 6-3/4 | 171.4 | 57.2(2-1/4) | NC46-67 | NC46 | 9140/9150 | 159.5 | 3.18:1 |
| 7 | 177.8 | 57.2(2-1/4) | NC50-70 | NC50 | 9140/9150 | 164.7 | 2.54:1 |
| 71.4(2-13/16) | NC50-70 | 9140/9150 | 164.7 | 2.37:1 | |||
| 7-1/4 | 184.2 | 71.4(2-13/16) | NC50-72 | NC50 | 9140/9150 | 169.5 | 3.12:1 |
| 7-3/4 | 196.8 | 71.4(2-13/16) | NC56-77 | NC56 | 9140/9150 | 185.3 | 2.70:1 |
| 8 | 203.2 | 71.4(2-13/16) | NC56-80 | NC56/6-5/8REG | 9140/9150 | 190.1 | 3.02:1 |
| 8-1/4 | 209.6 | 71.4(2-13/16) | 6-5/8REG | 6-5/8REG | 9140/9150 | 195.7 | 2.93:1 |
| 9 | 228.6 | 71.4(2-13/16) | NC61-90 | NC61 | 9140/9150 | 212.7 | 3.17:1 |
| 9-1/2 | 241.3 | 76.2(2-13/16) | 7-5/8REG | 7-5/8REG | 9140/9150 | 223.8 | 2.81:1 |
| 9-3/4 | 247.6 | 76.2(3) | NC70-97 | NC70 | 9140/9150 | 232.6 | 2.57:1 |
| 10 | 254.0 | 76.2(3) | NC70-100 | NC70 | 9140/9150 | 237.3 | 2.81:1 |
| 11 | 279.4 | 76.2(3) | 8-5/8REG | 8-5/8REG | 9140/9150 | 266.7 | 2.84:1 |
| Mechanical property: < 7 inch drill collar: yield strength ≥758Mpa, tensile strength ≥965Mpa, quadruple elongation ≥13%, impact work ≥54J, (single impact work ≥47J, average value ≥54J) hardness range 285HB-341HB ≥7 inch drill collar: yield strength ≥689Mpa, tensile strength ≥931Mpa, quadruple elongation ≥13%, impact work ≥54J, (single impact work ≥47J, average value ≥54J) hardness range 285HB-341HB | |||||||
Company Profile
Incorporated in August 2005,Yancheng Xinyongjia Petroleum Machinery Manufacturing Co., Ltd. is a first-class network enterprise of PetroChina &Sinopec and a national high-tech enterprise in Jiangsu Province,east China. The company has passed API and CE international certification, ISO9001: 2008 quality management system certification, ISO14001: 2004 environmental management system certification and OHSAS18001: 2007 occupational health and safety management system certification.The company has a registered capital of $15 million and covers an area of 80000 square meters.
Xinyongjia Petroleum is a professional manufacturer of downhole motors, screw drilling tools,drill pipe for measurement while drilling(i.e.directional cable drill pipe) and accessories. The downhole motors and other underground power tools that the company has manufactured according to the American API standard and other related standards are not only used in drilling and workover for major Chinese oil fields and coal mine ,but also exported to North America, the Middle East, North Africa, Central Asia, Southeast Asia, Russia,etc. They enjoy good market reputation. In 2020, the annual sales volume exceeded $15 million.
As a comprehensive petroleum machinery manufacturer integrating R&D,production,sales and services,Xinyongjia Petroleum has been deeply engaged in high-end production over 20 years.We can also customize products to meet the customer's requirements.
We are committed to become one of the most professional manufacturer in the industry.We will continue to provide our Chinese and overseas customers with high-quality products, favorable prices and professional services!
All Chinese and overseas customers are sincerely welcome to come and discuss cooperation with us.Thank you!
Our Advantages
1. Mature R&D team
Our company has formed an industry-university-research consortium with well-known Chinese colleges and universities such as Tongji University, East China University of Science and Technology, and established Jiangsu Enterprise Technology Center and Jiangsu Downhole Motor Engineering Research Center. Now the company has 15 invention patents, more than 30 utility model patents, 10 high-tech products , etc
2. Wide range of products
We don't only have a wide range of products for our customers to choose but also provide customization service to meet the need of our customers.
3. Perfect QMS certifcation
Our company has passed API and UDEM international certification, ISO9001: 2008 quality management system certification, ISO14001: 2004 environmental management system certification and OHSAS18001: 2007 occupational health and safety management system certification.
4. Advanced production and testing equipment
Production equipment includes CNC spiral slot milling machine, CNC pipe thread lathe, tungsten carbide supersonic flame spraying equipment, CNC deep hole drilling machine, etc.while testing equipment includes motor test stand, no rotor vulkameter, magnetic particle flaw detector, Menni viscosity testing machine. All products must pass strict inspection before they can be delivered.
5.The delivery period is short wothout complicated approval procedures. usually it is within a week for ordinary order while it is half a month for bulk order.
6.Timely and thoughtful after-sales service. At present, the company has set up nearly 20 after-sales ceneters in Petrochina, Sinopec,China Coal Group ,etc. In order to keep up with the development of the international market and meet the need of foreign users, the company will also set up after -sales centers abroad.
FAQ
1. Who are you?
Our company is called Yancheng Xinyongjia Petroleum Machinery Manufacturing Co., Ltd. located in Jiangsu Province,east China. Xinyongjia Petroleum is a professional manufacturer of downhole motors, screw drilling tools,drill pipe for measurement while drilling(i.e.directional cable drill pipe) and accessories.
2. Are you a manufacturer or trading company?
Our company is an enterprise integrating industry and trade,that is , our company does not only manufacture downhole motors ,other related products and accessories , but also sell them both at home and abroad.
3.How do you control product quality?
We produce downhole motors in accordance with API standards. We have always carried out strict quality-control in raw materials, downhole motor production process and finished products, and never let unqualified parts go into the next process, so that each downhole motor has passed inspection before delivery.
4. How can I place order?
4.1 our customer need inform us of the product name ,quantity ,detailed specifications ,packaging requiremnets and other related conditions.It is better to provide us with pictures or videoes of similar products so that we can understand exactly what he needs;
4.2 As per the customer's requirements , we will submit an offer and detailed specifications for confirmation;
4.3 After the customer's confirmation ,we will prepare proforma invoive(P/I) for both parties to sign and stampt;
4.4 The order will not be placed until payment is made for the supplier.
5. What about payment terms?
5.1 T/T 30% deposit, and 70% before delivery. We will show you the product photoes and packaging photoes before 70% payment. or
5.2 L/C at sight if the quantity is big.
