OCTG Deep Well Steel Grades
OCTG Deep Well Steel Grades
Deep well steel grades for the deepest drilling environments.
API P110 is an API grade for general use in deep wells. This grade is not generally considered suitable for sour condensate wells.
API Q125 is an API grade for deep well service, not generally for use in sour condensate wells. Quadrant hardness testing is required without any specified limits other than the variation between readings. Impact testing is required for each heat and/or lot. NDT inspection is required with two methods of inspection; typically EMI and UT are performed on this product.
Product | Minimum Yield Strength | Maximum Yield Strength | Minimum Tensile Strength | Maximum Hardness |
API P110 | 110,000 psi | 140,000 psi | 125,000 psi | None |
API Q125 | 125,000 psi | 150,000 psi | 135,000 psi | Hardness variation requirement |