| Joint OD Range (mm) | Min. Yield Strength | Min. Tensile Strength | Elongation (%) | Min. Brinell Hardness (HBW) | V-notch Impact Test at 21°C ± 3°C (Avg/Min) |
|---|---|---|---|---|---|
| 3 1/8 in – 6 7/8 in | 110 ksi | 140 ksi | 13 | ≥ 285 | 40 ft·lbs / 35 ft·lbs |
| 79.4 – 174.6 mm | 758 MPa | 965 MPa | 54 J / 47 J | ||
| > 6 7/8 in | 100 ksi | 135 ksi | 13 | ≥ 285 | 40 ft·lbs / 35 ft·lbs |
| > 174.6 mm | 689 MPa | 931 MPa | 54 J / 47 J |
nspection → End upsetting → Integral heat treatment → Pipe straightening → Pipe inspection (leakage, ultrasonic) → Physical and chemical testing → Finished pipe inspection → Cold straightening → Pipe end machining
Tool joint material incoming inspection → Sawing and forging (if necessary) → Joint upsetting → Joint marking → Joint heat treatment → Joint Brinell hardness testing → Physical and chemical testing → Ultrasonic inspection
Make-up/break-out test (if necessary) → Phosphating → Magnetic particle inspection → Joint marking → Cold rolling (if necessary) → Finished joint inspection → Joint thread machining → Joint profile machining
Final joint inspection
Drill pipe & joint end face preparation → Friction welding → Weld post-heating → Weld flash removal → Weld heat treatment (quenching, tempering) → Physical and chemical testing → Weld finishing → Magnetic particle inspection
Ultrasonic inspection → Finished product inspection → Hardbanding (if necessary) → Internal coating (if necessary) → Measuring, weighing and marking → Final inspection → Packaging → Delivery
