Zhong Guo Hua Gong Bao·2025-10-15 02:58Core Insights - China's Bohai Oilfield has established the most densely packed underwater pipeline network in the country, with over 3,200 kilometers of underwater oil and gas pipelines, contributing to a total length of over 10,000 kilometers, ranking among the top in the world [1][2] Group 1: Underwater Pipeline Network - The underwater pipeline is referred to as the "lifeline" of the marine oil and gas production system, connecting internal facilities of oil and gas fields and ensuring stable transportation of resources to land terminals, forming a complete production chain from "subsea wellhead - underwater pipeline - land terminal" [1] - The construction of underwater pipelines has seen significant advancements, with China National Offshore Oil Corporation (CNOOC) enhancing original technology and accelerating deepwater oil and gas exploration and development [1] Group 2: Technological Advancements - CNOOC has achieved comprehensive upgrades in pipeline laying capabilities, covering a full range of specifications from 2 inches to 48 inches, including single-layer, double-layer, composite, and mother-son pipe types, with technology and equipment capabilities reaching international advanced levels [1] - The evolution of vessel equipment, from first-generation shallow water S-lay pipelaying vessels to second-generation deepwater vessels, has driven the independent and comprehensive upgrade of China's underwater pipeline construction [2] Group 3: International Contributions - CNOOC is actively contributing to energy development in countries and regions along the "Belt and Road" initiative, having undertaken over 10 projects in Southeast Asia, the Middle East, and Africa, with a cumulative laying of over 500 kilometers of underwater oil and gas pipelines [2]