Core Viewpoint - China National Petroleum Corporation's Bohai Drilling Company has developed an integrated technology for complex lost circulation prevention, achieving international advanced standards as recognized by a technology appraisal committee in Tianjin [1] Group 1: Technology Development - The project has addressed multiple technical bottlenecks in complex lost circulation prevention by developing intelligent decision-making software, high-pressure adaptive plugging fluids, real-time intelligent pressure control techniques, and low-friction loss cementing systems [1] - The integrated technology combines materials, software, processes, and systems to enhance the success rate of plugging and reduce downtime [1] Group 2: Achievements and Applications - The project has secured 20 authorized invention patents, 5 registered software copyrights, and published 10 papers, along with establishing 3 industry standards [1] - The technology has been successfully applied in over 800 well instances in regions such as the Tarim Basin and the southern edge of the Junggar Basin, contributing to high-quality completions of key deep wells like Qingbei 1 and Deep Earth Taka 1 [1]