Core Viewpoint - The company has achieved a significant breakthrough in the development of an efficient oil-washing isolation fluid, successfully applied in the Sichuan shale gas block, addressing technical challenges in cementing quality in ultra-deep wells [1] Group 1: Technology Development - The newly developed technology was successfully applied in the ultra-deep well Yang 101H48-3, achieving a washing efficiency exceeding 95% [1] - The technology addresses the common industry challenge of oil-based drilling fluids hindering cementing quality due to the formation of strong oil-wetting films [1] Group 2: Application and Impact - The Yang 101H48-3 well reached a depth of 6220 meters, facing severe challenges such as loss circulation and collapse due to complex formation pressure systems [1] - The company has developed a high-efficiency washing agent with well wall wetting reversal functionality, significantly improving cementing quality and achieving domestic leading technical standards [1] - The technology has been scaled for application, with a cumulative use in 12 wells in the Sichuan-Chongqing region and product supply exceeding 100 tons [1] Group 3: Recognition and Performance - The application of this technology in five wells in key areas such as Northeast and Dagang has notably enhanced cement ring bonding quality and cementing success rates, receiving high recognition from construction units and clients [1]