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| Product Name: |
Drilling collar
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| Supply Ability: |
10000T |
| Related proudcts |
drill pipe, drilling tool, |
| Specifications |
API SPEC 7 |
| Price Term: |
FOB |
| Port of loading: |
SHANGHAI |
| Minimum Order |
1T |
| Unit Price: |
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Material Selected
The collars are made of AISI 4145H forging or finish rolling alloy structural steel.
Processing and thermal treatment of the pipe hole
The drill collar are trepanned and drifted to API Spec 7. Grinding crafts adopted finish boring technology eliminates regions of the weld stress concentration, making welding appearance more perfect, and increases their life. The full length thermal treatment ensure the mechanical performances fullfil even exceed API Spec 7 requirements. Its brinell hardness ranges from 285 to 341, moreover, charpy "v" notch minimum i***ct strength of 40 ft-lb at 70 are guaranteed one inch below the surface.
Traceability
From receipt of mill's certified raw material to the completion of all the processing, in each process of which complete traceablity mechanism workcraft. Serial numbers are die stamped on bar bodies.
Routine and strict inspection procedures
All our drill collars are inspected to comply with the API standards. These inspections include fluorescent magnetic |
| Company: |
shanghai electrical equipment import&export co.,ltd.
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| Contact: |
Mr. deng wesley |
| Address: |
No.333 jinyao road ,shanghai |
| Postcode: |
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| Tel: |
86 18019286169 |
| Fax: |
021-69001966 |
| E-mail: |
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