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[China]
Trade Verify
Address: No.10 West of North Second Rig, Weiyang District, Xi’an City, China
Contact name:Sunny Lee
Xi'an TianRui Petroleum Machinery Equipment Co., Ltd. |
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Verified Suppliers
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AISI 4145H Sprial Drill Collar Non Magnetic Drill Collar
Product Descrption
We supply slick drill collars, spiral drill collars and non-magnetic drill collars. Their sizes are from 3-1/8 to 11 inches. Besides the drill collars in the table below, we can supply other drill collars at customers' request.
Trepanning and Heat Treatment:
Drill collars are trepanned and drifted to API Spec 7-1.
Full-length heat-treatment processes ensure that mechanical
properties meet or exceed API Spec 7-1 requirements. A hardness
range of 285-341, Brinell hardness and Charpy "V" notch minimum
impact strength of 40 ft-lb at 70 F are guaranteed one inch below
the surface.
Traceability:
Drill collar material and process traceability are maintained from
receipt of the mill's certified raw material to completion of
manufacturing. Serial numbers are die stamped on bar bodies.
Rigid Inspection Procedures:
We inspect all our drill collars to ensure compliance with API SPEC
7-1 standards. These inspections include visual dimensional checks
as well as ultrasonic inspections over the entire body of the drill
collar.
Main Advantages of Application of Our Drill Collar
Technical Parameters of Our Oilfield Drill Collar
| Type | OD(mm) | ID(mm) | L(m) ±152.4mm d | DF(mm) ±0.4 |
NC23-31 | 79.4 | 31.8 | 9.14 | 76.2 |
| NC26-35 | 88.9 | 38.1 | 9.14 | 82.9 |
| NC31-41 | 104.8 | 50.8 | 9.14or9.45 | 100.4 |
| NC35-47 | 120.6 | 50.8 | 9.14or9.45 | 114.7 |
| NC38-50 | 127 | 57.2 | 9.14or9.45 | 121 |
| NC44-60 | 152.4 | 57.2 | 9.14or9.45 | 144.5 |
| NC44-60 | 152.4 | 71.4 | 9.14or9.45 | 144.5 |
| NC46-62 | 158.8 | 57.2 | 9.14or9.45 | 149.2 |
| NC46-62 | 158.8 | 71.4 | 9.14or9.45 | 150 |
| NC46-65 | 165.1 | 57.2 | 9.14or9.45 | 154.8 |
| NC46-65 | 165.1 | 71.4 | 9.14or9.45 | 154.8 |
| NC46-67 | 171.4 | 57.2 | 9.14or9.45 | 159.5 |
| NC50-70 | 177.8 | 57.2 | 9.14or9.45 | 164.7 |
| NC50-70 | 177.8 | 71.4 | 9.14or9.45 | 164.7 |
| NC50-72 | 184.2 | 71.4 | 9.14or9.45 | 169.5 |
| NC56-77 | 196.8 | 71.4 | 9.14or9.45 | 185.3 |
| NC56-80 | 203.2 | 71.4 | 9.14or9.45 | 190.1 |
| 6-5/8REG | 209.6 | 71.4 | 9.14or9.45 | 195.6 |
| NC61-90 | 228.6 | 71.4 | 9.14or9.45 | 212.7 |
| 7-5/8REG | 241.3 | 76.2 | 9.14or9.45 | 223.8 |
| NC70-97 | 247.6 | 76.2 | 9.14or9.45 | 232.6 |
| NC70-100 | 254 | 76.2 | 9.14or9.45 | 237.3 |
| 8-5/8REG | 279.4 | 76.2 | 9.14or9.45 | 266.7 |
| NC50-67 | 171.5 | 71.4 | 9.14or9.45 | 159.5 |
Cold Rolling: Drill collar thread roots, as well as elevator recess
upper radius, are cold-rolled. Cold rolling creates a compressive
recess upper radius stress condition that increases fatigue life by
minimizing crack initiation.
Phosphate-coated or Copper Plating: All connections are phosphate-coated or copper plated to improve resistance to corrosion.
Slip Groove, Elevator Groove and Size: We offer optional slip and elevator recesses to improve handling efficiency and safety. Unless otherwise specified, slip and elevator recesses are machined in compliance with API spec 7-1 guidelines.
Xi'An TianRui Petroleum Machinery Equipment Company Limited with perfect attitude, product and service, is going to make further development together with customers at home and abroad.
Competitive Advantages
1. We offer high quality products at competitive price.
2. Shortest delivery time.
3. Flexible payment terms.
4. Timely after-sale service.
5. Most of our equipment can be replaceable with international
brands.
6. Our products have been exported to Argentina, Egypt, US,
Australia, Romania, Pakistan, Dubai, Abu Dhabi, Iran, India,
Indonesia, Vietnam, Malaysia and many other countries.
