August 7, 2025 – Energy Correspondent 1. Upstream Applications: Drilling & Extraction Case Study: The Sakhalin-III Arctic Offshore Project (2024) Deploys API 5L X80 seamless pipes with 550MPa yield strength for -60°C subsea wellheads Wall thickness precision: ±0.15mm prevents gas hydrate formation in permafrost zones Technical Edge: • Drill collars use 4140 chrome-moly seamless tubes […]