Tianjin Enterprises Independently Implement Operations to Fill China's Technical Gap China's first deep-water plough trencher successfully tested

The picture shows the scene of the sea trial. (Courtesy of CNOOC Engineering Company)

　　Yesterday, the first sea trial operation of the mainland's first deep-water ploughing trencher independently implemented by the Tianjin Port Free Trade Zone enterprise Offshore Oil Engineering Co., Ltd. was a complete success in the yacheng waters of the South China Sea, filling the technical gap in the ploughing trenching of the mainland's deep-water submarine pipeline.

　　The plough type trencher in this sea trial is currently the only deep-water submarine pipeline plough type trencher in China, and it is also one of the most powerful plough type trenchers in the world. The projection area of the equipment exceeds 3 standard badminton courts, the self-weight is 180 tons, the maximum working water depth is 500 meters, and the maximum depth of trenching can reach 2.5 meters.

　　"Compared with the traditional jet trenching method, the soil shear force of the plough-type trencher equipment can be increased by 5 times, and the trenching efficiency can be increased by 3 times, which is a veritable 'weapon' for offshore oil and gas development, representing the advanced direction of the development of trenching equipment technology in the world." Lin Shouqiang, chief engineer of CNOOC Engineering Shenzhen Ocean Engineering Technical Service Co., Ltd., said.

　　"There is no precedent in this sea trial in China, and the project personnel have overcome 8 key technologies such as deep water drop and accurate placement of trenching and ploughing, slope construction into mud and mud, underwater precision dragging and dynamic weight adjustment, and successfully mastered the complete set of construction technology of deep water subspoil plough trenching, which not only fills the gap in the domestic deepwater seabed plough trenching technology, but also forms the supporting capacity of the submarine pipeline deepwater development operation fleet." Xia Baoying, head of the sea trial project of the deep-water plough trencher, said.