Mechanical Property of Slick and Spiral drill collars:
OD Range (in) | Yield Strength (MPa) | Tensile Strengt h (MPa) | Elongation (%) | Hardness (HB) | Impact Test (J) |
3 1/8 ~6 3/4 | ≥758 | ≥965 | ≥13 | 285~341 | ≥54 |
7~11 | ≥689 | ≥930 | ≥13 | 285~341 | ≥54 |
Mechanical Property of Non-mag Drill Collars:
OD Range (in) | Yield Strength (Mpa) | Tensile Strength (Mpa) | Elongation (%) | Hardness (HB) | Impact Test (J) |
3 1/8 ~ 6 3/4 | ≥758 | ≥827 | ≥18 | ||
7 ~ 11 | ≥689 | ≥758 | ≥20 |