| After-sales Service: | Yes |
|---|---|
| Warranty: | 1 Year |
| Manufacturing Process: | Casting |
| Surface Treatment: | Galvanized |
| Operation Pressure: | Atmospheric Pressure |
| Material: | Alloy |
| Samples: |
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| Customization: |
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Audited Supplier Drill collar is mainly used to provide bit weight to drill bit so that drill pipe is in tension.especially drill collar can keep drill bit centralized and hole track by large rigidity.drill collar are manufactured strictly API 7-1 standard.
There are different kinds of drill collars,including round drill collar,spiral drill collar,non-magnetic drill collar,square drill collar and so on.Ordinary drill collar is the circular cross section, the center has a water hole,the wall thickness is larger,the nozzle is smaller, the weight of per unit length is greater than the size of drill pipe almost 4- 5 times .The majority of drill collar is thread processing directly on the pipe body , but some of them also use the replaced joint.
1. Material: P550,P540,P530
2. Shape: It is the round pipe with smooth surface and thick wall, and the both ends are machined screw thread for connection.
3. Use: It is mainly used for the inspection in the process of petroleum drilling.
4. Standard: API Spec 7-1 or SY/T5144 Standard.
5. Inspection&Test: When producing, traceability are maintained from the receipt of raw material to completion of final products, and serial numbers are die-stamped on each workpiece body. During each manufacturing process, inspection and test are performed.
6. Magnetic permeability(MPS=1×105/4∏A/m)
1). Average: Ur<1.010.
2). Magnetic Field Gradient: ΔB≤0.05μT.
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m |
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Design |
O |
D |
ID |
Lengh |
Chamfer Diameter |
|
|
|
in |
mm |
+1.6-0.0mm |
+152.4mm |
+0.4mm |
Reference ratio for curvature strength |
|
NC23-31 |
3 1/8 |
79.4 |
31.8 |
9.15 |
76.2 |
2.57:1 |
|
NC26-35 |
3 1/2 |
88.9 |
38.1 |
9.15 |
82.9 |
2.42:1 |
|
NC31-41 |
4 1/8 |
104.8 |
50.8 |
9.159.45 |
100.4 |
2.43:1 |
|
NC35-47 |
4 3/4 |
120.7 |
50.8 |
9.159.45 |
114.7 |
2.58:1 |
|
NC38-50 |
5 |
127.0 |
57.2 |
9.159.45 |
121.0 |
2.38:1 |
|
NC44-60 |
6 |
152.4 |
57.2 |
9.159.45 |
144.5 |
2.49:1 |
|
NC44-60 |
6 |
152.4 |
71.4 |
9.159.45 |
144.5 |
2.84:1 |
|
NC44-62 |
6 1/4 |
158.8 |
57.2 |
9.159.45 |
149.2 |
2.91:1 |
|
NC44-62 |
6 1/4 |
158.5 |
71.4 |
9.159.45 |
150.0 |
2.63:1 |
|
NC46-65 |
6 1/2 |
165.1 |
57.2 |
9.159.45 |
154.8 |
2.76:1 |
|
NC46-65 |
6 1/2 |
165.1 |
71.4 |
9.159.45 |
154.8 |
3.05:1 |
|
NC46-67 |
6 3/4 |
171.5 |
57.2 |
9.159.45 |
159.5 |
3.18:1 |
|
NC50-70 |
7 |
177.8 |
57.2 |
9.159.45 |
164.7 |
2.54:1 |
|
NC50-70 |
7 |
177.8 |
71.4 |
9.159.45 |
164.7 |
2.73:1 |
|
NC50-72 |
7 1/4 |
184.2 |
71.4 |
9.159.45 |
169.5 |
3.12:1 |
|
NC56-77 |
7 3/4 |
196.9 |
71.4 |
9.159.45 |
185.3 |
2.70:1 |
|
NC56-80 |
8 |
203.2 |
71.4 |
9.159.45 |
190.1 |
3.02:1 |
|
6 5/8REG |
8 1/4 |
209.6 |
71.4 |
9.159.45 |
195.7 |
2.93:1 |
|
NC61-90 |
9 |
228.6 |
71.4 |
9.159.45 |
212.7 |
3.17:1 |
|
7 5/8REG |
9 1/2 |
241.3 |
76.2 |
9.159.45 |
223.8 |
2.81:1 |
|
NC70-97 |
9 3/4 |
247.7 |
76.2 |
9.159.45 |
232.6 |
2.57:1 |
|
NC70-100 |
10 |
254.0 |
76.2 |
9.159.45 |
237.3 |
2.81:1 |
|
8 5/8REGc |
11 |
279.4 |
76.2 |
9.159.45 |
266.7 |
2.84:1 |
Dongying Zhao Xin Industry and Trade Co., Ltd. was established in 2001. Our company is located in Dongying city which has the second largest Oilfield (Shengli Oilfield) in China. We are a company, which conducts scientific research, development, manufacture, sale and after sale service, is one enterprise for oilfield tool and equipment manufacturer. We cover an area of more than 9000 square meters which manufacture different oilfield products. Our main products include drilling equipment, oil production equipment, oil well service tools. Such as sucker rod, drill pipe, OCTG products, bridge plug. Currently, our products are already exported to North America, South America, Middle East, Middle Aisa, India and other countries and regions. The warranty period of all our products is 18 months.
We are an I S O 9 0 0 1, I S O 1 4 0 0 1, I S O 4 5 0 0 1,API certified company and have all the quality systems in place for design, planning, manufacturing and quality monitoring & traceability to ensure that all products match the quality & reliability Standards. We also have an independent measurement and inspection department, the inspection and measuring tools are fully equipped, we control each process to ensure that all products are qualified.
Dongying Zhaoxin Industry and Trade Co.,Ltd with perfect attitude, product and service, is going to make further development together with customers at home and abroad .
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Audited Supplier 
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