【Ten Years of Rapid Development in Chemical Engineering Equipment】7,200–4,060 meters: China’s mainland record for the length of directional drilling crossings for gas pipelines from 2007 to 2019
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Witnessing the decade-long rapid development of chemical processing equipment, I admire the prosperity and strength of modern China. This is just a modest contribution; I invite everyone to participate more actively in the forum discussions – the more people involved, the more lively it becomes. HaiChuan becomes even better with your presence. There are prizes for those who leave replies; feel free to discuss! ------------------------------------------------- On July 26, 2019, the gas transmission pipeline associated with the Sino-Science Refining and Chemical Integration Project, located in Zhanjiang, Guangdong, was successfully drilled through the Tongming Strait using directional drilling. The length of this drill passage was 4,060 meters, setting a new record for the longest directional drilling passage for natural gas pipelines on the Chinese mainland. According to the China Securities Journal, the pipeline project supporting the Sinochem Refining and Chemical Integration Project consists of one main line and one branch line, with a total length of 75.5 kilometers, a pipe diameter of 508 millimeters, and a designed annual gas transmission capacity of 1.8 billion cubic meters. The main line starts at Chengbeimen Station in Mazhang District, Zhanjiang City, crosses the Tongming Strait, and then heads southeast to Sinopec Refining & Chemical ； The branch line starts at Huguang Gas Transmission Station and extends eastward to Dongxing Refining and Chemical Plant.
The pipeline project supporting the Sinochem Refining and Chemical Integration Project consists of one main line and one branch line, with a total length of 75.5 kilometers, a pipe diameter of 508 millimeters, and a designed annual gas transmission capacity of 1.8 billion cubic meters. The main line starts at Chengbeimen Station in Mazhang District, Zhanjiang City, crosses the Tongming Strait, and then heads southeast to Sinopec Refining & Chemical ； The branch line starts at Huguang Gas Transmission Station and extends eastward to Dongxing Refining and Chemical Plant. The directional drilling passage through the Tongming Strait is the key control project for the pipeline system associated with the Sinopec refining and chemical integration project. The site is located near the First-Class Mangrove Nature Reserve as well as large areas dedicated to marine aquaculture, and it is characterized by a complex stratum structure and high environmental requirements. Sinopec Natural Gas Branch actively fulfills its commitment to being a green enterprise by protecting the marine ecological environment. It has invited domestic experts to conduct technical evaluations on multiple occasions and organized efforts to address technical challenges; construction materials such as mud are used in environmentally friendly formulations, all in an effort to maintain the health and stability of the ecological environment in the Tongming Bay Strait.
This successful crossing has laid a solid foundation for the timely completion and operation of the entire gas pipeline project. It has also provided experience for the construction of long-distance gas pipeline crossings, and once completed, it will ensure a stable supply of gas for the Sino-Science integration project. A responsible official from Sinopec explained that the pipeline resources required for the integrated refining and chemical processing project are mainly sourced from Sinopec’s Beihai LNG receiving station. Since it began operating commercially in 2016, this station has received a total of 4.64 million tons of liquefied natural gas (LNG), contributing to ensuring a supply of gas for industrial use and household needs in South China.
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