At 5:18 on February 22, the land and sea crossing project of the Zhoushan LNG Receiving Station and Filling Station Project of Zhejiang Province, which was undertaken by the China Petroleum Pipeline Bureau, completed a one-time retraction of directional drilling at Niutoushan, creating the largest pipe diameter in China (1016 mm) , The largest water depth (27 meters) land and sea directional drilling crossing record.

Undertaking the two land and sea directional drilling traversing projects of the Niutoushan and Mamu Zhoushan projects are the four companies of the China Petroleum Pipeline Bureau (CPP) known as "pipeline special forces". Among them, the Mamu directional drill was successfully towed back in January this year. The Niutoushan pipeline towed back in this construction is 1080 meters in length, the main geology is silt and silty clay, the depth of seawater is 27 meters, and the horizontal section is buried at a depth of 45 meters. The towed pipeline is prefabricated on a pipelaying vessel and towed by a land drilling rig. Pull back.

In order to speed up the construction progress of the project, the project departments of the four companies of the China Petroleum Pipeline Bureau (CPP) make use of the coordination capabilities of all parties on the site to coordinate the construction plan, the reverse schedule, the precise plan, and scientific scheduling. Facing the sudden outbreak of the new crown pneumonia epidemic, relevant leaders of the four companies of the Pipeline Bureau are on duty 24 hours a day, do a good job of propaganda and guidance of epidemic prevention and control knowledge, and do a good job of reserve of emergency materials to ensure accurate construction production progress and precise management of epidemic prevention and control In place.

According to reports, land-sea directional drilling has the advantages of high safety coefficient, protecting the ecological environment, and saving project investment. It is increasingly used in marine pipeline network projects, and the industry has a very bright future.