| Customized: | Customized |
|---|---|
| Surface Treatment: | Spray |
| Type: | Spiral Drill Collar |
| Standard: | API |
| Usage: | Oil Mining, Coal Mining, Well Drilling |
| Material: | Non-Magnetic Material |
| Customization: |
|---|
Suppliers with verified business licenses
Audited Supplier Non-magnetic drill collars have unusual design requirements, and as a result pose unique problems of corrosion resistance. Drill collars are the bottom components in a drill string, where their weight generates the force on the drill bit allowing it to drill and their stiffness allows the force to be transmitted without buckling. Conventional drill collars are made of alloy steel, like the rest of the drill string, and their corrosion usually poses no problems except to their threaded connections. A typical drill collar is 30 feet long and 4 to 9 inches in diameter.
1. Double Top Structure:
drill pipr joints adopt the double ledge(double top)structure, such structure can enhance the tightness of joints so that the pressure of the mud could realize non-leakage half way. greatly reduce the resistance to polit drilling and back using this sturcture improves the torional strength of drill pipr so that the box thread will not deformed
2. After optimal design of equal strength and the dispersion of stress to give dull play to the potiontioal of the drill pipr matrial.
3. After forging joints materials, increased matrial density and change the material of fibrous tissue, thereby enhancing its machanical properties.
4.Using joints nitride, phonsphide or copper treatment to ensure thread anti- corrosion, anti-stick, and improve joint surface fatigue resisitance.
5. Unsetting& thickening to the tube, improvinig the metallurgical structure and enhancing the impact toughness, ensuring comprehansive mechanical properties and the friction weld seals not be broken.
| Nominal size | D | d | L | DF | Bending Strength ratio | ||
| mm | in | mm | in | mm | mm | ||
| NC31-41(2-7/8IF) | 104.8 | 4-1/8 | 50.8 | 2 | 9150 | 100.4 | 2.43:1 |
| NC35-47 | 120.7 | 4-3/4 | 50.8 | 2 | 9150 | 114.7 | 2.58:1 |
| NC38-50(3-1/2IF) | 127.0 | 5 | 57.2 | 2-1/4 | 9150 | 121.0 | 2.38:1 |
| NC44-60 | 152.4 | 6 | 57.2 | 2-1/4 | 9150/9450 | 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 | 6-1/4 | 57.2 | 2-1/4 | 9150/9450 | 149.2 | 2.91:1 |
| NC46-62(4IF) | 158.8 | 6-1/4 | 71.4 | 2-13/16 | 9150/9450 | 150.0 | 2.63:1 |
| NC46-65(4IF) | 165.1 | 6-1/2 | 57.2 | 2-1/4 | 9150/9450 | 154.8 | 2.76:1 |
| NC46-65(4IF) | 165.1 | 6-1/2 | 71.4 | 2-13/16 | 9150/9450 | 154.8 | 3.05:1 |
| NC46-67(4IF) | 171.4 | 6-3/4 | 57.2 | 2-1/4 | 9150/9450 | 159.5 | 3.18:1 |
| NC50-67(4-1/2IF) | 171.4 | 6-3/4 | 71.4 | 2-13/16 | 9150/9450 | 159.5 | 2.37:1 |
| NC50-70(4-1/2IF) | 177.8 | 7 | 57.2 | 2-1/4 | 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 | 2-13/16 | 9150/9450 | 195.7 | 2.93:1 |
| NC61-90 | 228.6 | 9 | 71.4 | 2-13/16 | 9150/9450 | 212.7 | 3.17:1 |
| 7-5/8REG | 241.3 | 9-1/2 | 76.2 | 3 | 9150/9450 | 223.8 | 2.81:1 |
| NC70-97 | 247.6 | 9-3/4 | 76.2 | 3 | 9150/9450 | 232.6 | 2.57:1 |
| NC70-100 | 254.0 | 10 | 76.2 | 3 | 9150/9450 | 237.3 | 2.81:1 |
Xi′an BOBAN Oil Tools Co., Ltd. Make & Supply a full line of equipment for O& G, horizontal directional drilling (HDD), micro-tunnelling, pipe jacking, etc, In O& G section, we can supply drilling rig component, downhole drilling tools, fishing tools, tubular handling tools, well control equipments, drilling fluid mixing & Recycling system, solid controling equipments and other relevant oiltools,
All our products are API certified, and we are also authorized by ISO: 9001-2000. With advanced production facilities, rigorous quality management, and the joint efforts of our experting staff, Boban has been qualified vendor for many renowned companies in Italy, Germany, Poland, UAE, Kuwait, Egypt, & South East Asia, etc since its establishment in 2018. And obtained a good reputation among the offshore customers as well as other industrial clients.
With our reasonnal prices, quick reaction, high quality products and deliver anywhere on time as well as superior service, Boban has stablished good cooperation relationship with many well-known customers in the world, and also wish to have the chance to work with more and more customers from all over the world!
1. As a professional oil and gas service company, Boban petroleum has many good experience is selling and serve for the oilfield industries, quality is the culture of the company, we obtained the API standard for all the oiltools, and also certified by ISO:9001-2000.
2. Good service for the communication, delivery and after sales.
3. With rich experience, so we can be your long term supplier.
4. Own factories in China mainland
5. QUALITY SESTEM to make sure the superior high quality
6. Large product series for one-stop service
7. Consulting, suggesting, help find perfect solution
Suppliers with verified business licenses
Audited Supplier 
){kind=link}
){kind=link}