【Ten Years of Rapid Development in Chemical Engineering Equipment】The First Domestic Sea-to-Sea Directional Drilling for Oil and Gas Pipelines from 1973 to 2022

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This post was last edited by Desert Fish on December 24, 2022, at 16:56. Witness the ten-year development of chemical processing equipment and celebrate the prosperity and strength of modern China. More people’s participation makes things more lively; HaiChuan becomes even better with you in it. This is just a starting point – we welcome everyone to engage more in discussions on this forum. Replies will be rewarded; feel free to discuss! ------------------------------------------------- At 5:56 p.m. on July 5, 2022, in the waters off Zhoushan, Zhejiang, with the last drill pipe pulled out of the water, the offshore directional drilling project for the Zhejiang Petroleum Huangzeshan-Yushan crude oil pipeline was successfully completed after 68 hours. This is the first sea-to-sea directional drilling crossing of an oil and gas pipeline in China, as well as the deepest and largest-diameter sea-to-sea directional drilling crossing of an oil and gas pipeline in the world. The total length of the pipelines for this project is approximately 46.5 kilometers, with the deepest point being 35 meters below the sea floor. The sea-to-sea directional drilling technology used in this project has no precedents in China; both the difficulty of construction and the scale of the work make it one of the most challenging projects of its kind in the world. The success of this crossing has established a completely new construction method for offshore oil and gas pipelines in China. It will provide strong technical support for the development of marine areas where existing pipelines and cables, ecological protection zones, and shipping anchorages exist, thereby significantly enhancing the utilization of complex marine areas in our country. It is understood that this project is a landmark initiative undertaken by Zhejiang Energy Group to implement the new strategy for energy security and to support major strategic investments; it is expected to supply 20 to 30 million tons of crude oil per year to the Zhejiang Zhoushan Green Petrochemical Base, which is the largest single-industry investment project in the world.