drill collar
Minimum Order: 0
Quality/Safety Certification: 0.00
The drill collar is according to SY/T5144-1997 and API 7-1 " Specification for Rotary Drill Stem Elements" standard
AB Type Drill collar mechanical properties
OD scope | Yield strength MPa | tensile strength MPa | elongation % | Brinell hardness HB | Charpy impact J | |
mm | in | |||||
79.4171.4 | 31/863/4 | ≥758 | ≥965 | ≥13 | 285341 | ≥54 |
177.8279.4 | 711 | ≥689 | ≥930 | ≥13 | 285341 | ≥54 |
C Type Drill collar mechanical properties
OD scope | Yield strength MPa | tensile strength MPa | elongation % | Brinell hardness HB | Charpy impact J | |
mm | in | |||||
79.4171.4 | 31/863/4 | ≥758 | ≥827 | ≥18 |
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177.8279.4 | 711 | ≥689 | ≥758 | ≥20 |
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