[Ten years of development of chemical equipment] 1166-2022 The world’s largest special-shaped pipe clamp was successfully installed on the seabed
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This post was last edited by Swimming Fish in the Desert on 2023-10-4 14:17 to look at the development of chemical technology in the past ten years and praise China's prosperity and strength in the prosperous age. It will be more lively with everyone's participation and the sea will be more exciting with you. [Ten Years of Development of Chemical Equipment] Continue to update the summary post. Welcome to participate in the discussion https://bbs.hcbbs.com/thread-3576046-1-1.html Happy National Day! ! ! , ---------------------------------------- On July 26, 2022, the submarine pipe card permanent repair project for the permanent repair of deformation defects of the submarine pipeline in Cezhen of the National Pipeline Network Group, implemented by China Petroleum Offshore Engineering Company EPC general contracting, was successfully installed. This is the largest special-shaped pipe clamp currently used in the world. It has set six domestic firsts and two world firsts, and provides a new solution for the permanent repair of defects in global submarine pipelines. The Cezhen submarine pipeline is an important part of the Yong-Shanghai-Ningbo crude oil pipeline network and is a guarantee * * Important facilities for energy security, their maintenance projects are * * The Pipeline Network Group has listed it as the No. 1 safety hazard management project. The pipe clamp used in the project maintenance has a maximum diameter of 762 mm, a weight of 24 tons, and a length of 6.15 meters. The installation accuracy reaches millimeter level. The saturation of diving operations is rare in the world, and it is known as the "World's No. 1 Card". The offshore engineering company has established a strong scientific research team, independently designed and produced a special pipe clamp installation frame, and adopted advanced offshore engineering equipment such as an H-shaped rear trencher. Relevant experts in the industry have determined that it is the first in the country in terms of underwater high-precision positioning, ultra-deep trenching, and ultra-high-pressure demolition. The installation method of the mounting frame and the underwater blind installation of three-dimensional angle special-shaped pipe clamps are the first in the world.
Plan design and preliminary preparation strive for excellence. After the construction plan design was completed, the company invited 38 well-known domestic experts to conduct demonstrations four times, and conducted underwater tests and practical training on all operating procedures. The pipe clamp installation process is the core of the project. The company organized 50 days of above-water and underwater training, simulation training and installation tests in advance, optimized 11 design plans, and eliminated foreseeable operational obstacles. Many new technologies are the first in the country. Demolition must be carried out under 30 meters of water, and the difficulty of construction organization is rare in China. Through scientific and technological research, technicians adapted the H-type rear trenching equipment to achieve a digging depth of 9.5 meters, the first in the country ； Using 180 MPa fully automatic underwater high-pressure jet demolition equipment, it can not only effectively remove the anti-corrosion layer and protective layer of pipelines, but also ensure that the pipelines are not damaged. It is the first domestic application. ； It uses Trimble satellite station differential GPS navigation signals with an accuracy of less than 10 centimeters, and uses three-dimensional sonar and other methods for simultaneous positioning, providing three-dimensional centimeter-level positioning support for underwater construction. ； The use of underwater fully automatic three-dimensional dot-type high-precision automatic surveying and mapping equipment is 10 times more efficient than manual surveying and mapping. At the same time, 30-meter water depth laser dry warehouse measurement is used for accuracy verification. Both technologies are successfully applied for the first time in China. ； The submarine pipeline in-situ monitoring system was used to observe the pipeline settlement. The actual settlement was 2.5 centimeters, which was far lower than the design requirement of 7 centimeters. It was the first successful application in China.
【Haichuan's Eye-Opening】More pictures! ! ! ! How are subsea pipelines repaired? ? ? https://bbs.hcbbs.com/thread-5262200-1-1.html (Source: Haichuan Chemical Forum Network)