Caisson of CNOOC Wenchang 19-1D platform completed and shipped
Thread Content
On July 15, CNOOC reported that the jacket of the Wenchang 19-1D platform was successfully completed and loaded onto a ship in Zhuhai, Guangdong, setting off for the operation area and marking the beginning of the offshore installation process. It is reported that the jacket for the Wenchang 19-1D platform began construction on August 8, 2023, at CNOOC Engineering’s Zhuhai Deepwater Equipment Manufacturing Base. Fixed jacket platforms are key equipment for offshore oil and gas development; the jacket serves as a \"foundation,\" supporting the stability and safety of the entire offshore oil and gas platform. The jacket of the Wenchang 19-1D platform is of the 8-leg, 12-pile type, with a total height of approximately 135 meters, equivalent to 45 floors. Its launch weight exceeds 13,000 tons; it is the first structural element of the Wenchang project to be completed on land. During the construction of the engineering project, the project team overcame the adverse weather conditions, accelerated the construction pace, coordinated construction resources effectively, strictly ensured safety and quality, vigorously adopted digital management approaches and modular integrated construction methods, innovatively applied sophisticated 3D modeling techniques, optimized the construction process, and adjusted construction plans and sequences in real time, thereby reducing the overall assembly time by 10%. At the same time, strict quality control is maintained, with the flaw detection success rate for jacket structures reaching 99.85%, ensuring that the jackets are delivered on time in high quality. According to Wang Minfeng, the project manager for the jacket construction at the Wenchang 19-1D platform, the jacket was loaded onto the ship during the rainy season, when severe convective weather occurs frequently. To this end, the project team organized numerous technical discussions, developed customized construction plans based on key factors such as tidal windows, barge loads, and structural dimensions, planned the cleaning and transportation routes in advance, inspected and tested critical equipment one by one, and identified potential risks. To ensure the progress of project construction and reduce the downtime of construction vessels, the project team develops a detailed work plan to identify and eliminate risks in advance. Four tension jacks were used in combination to pull the jacket into place during this loading operation. After 9 hours of pulling, the jacket was successfully installed on the \"Offshore Oil 228\" barge, 2 hours ahead of the original schedule. Next, the jacket for the Wenchang 19-1D platform will be lowered and installed in the waters off Wenchang. Together with the subsequent platform modules and drilling rig units, it will form a multi-functional offshore oil development platform for drilling, production, and living purposes, thereby injecting fresh momentum into the expansion of oil production in the western South China Sea oil fields.
January 22, 2024, 17:04 – Source: Southern Plus. Recently, the largest structural component of the Wen Chang 19-1D platform, namely the 1HM component, was fully assembled at CNOOC Engineering’s Zhuhai facility. The Phase 2 development project for Wenchang 19-1 involves the construction of a new 8-leg drilling and production platform – the Wenchang 19-1D platform – which will be connected to the Wenchang 19-1 pier. The jacket of this platform is constructed horizontally using slides, with a total height of 135.2 meters. The 1HM segment is the largest segment of this jacket, with a total length of over 70 meters and a total weight of approximately 300 tons. The overall prefabrication of the panel elements is carried out through integrated construction using temporary pads on slideways, which effectively saves assembly time, reduces the need for high-altitude work later on, lowers operational risks and construction difficulties, and improves efficiency in the subsequent overall construction process. As the construction progress accelerates, the site continues to increase its investment in human resources, pushing the project development forward at a rapid pace. All members of the Wenchang project team have maintained a careful and meticulous attitude, giving full play to the vanguard role of Party members. They have strictly controlled safety and quality throughout the production process, strengthened the approval and review of design documents as well as the inspection of materials on site, thereby ensuring the steady progress of the project. Currently, 70% of the pipe segment rolling work has been completed for the jacket of the Wenchang 19-1D platform, while sandblasting and painting operations as well as the prefabrication of the skirt are also in progress. The project team will remain committed to the goal of completing and putting the project into operation, accelerating its construction, and contributing to CNOOC Zhanjiang Branch’s successful achievement of its production targets with its engineering efforts.
New construction progress! The main structure of the Wen Chang 19-1 jacket has been completed. CNOOC Engineering recently succeeded in finishing the construction of the main structure of this jacket at the Zhuhai Deep-water Equipment Manufacturing Base. This jacket will be used in the Wen Chang oil field complex; the average water depth there is 120 meters, the total weight is around 12,120 tons, and the total height is approximately 134.2 meters. Over 77 days, the project team completed 29 prefabricated components and carried out 23 lifting operations, thereby achieving the completion of the project’s main structure. The total weight of the SB4-1~3 skirt pile structures to be lifted this time is 417 tons, with a net weight of 397 tons; thus, the lifting process is challenging and high precision in terms of dimensions is required. The project team used the “three-lift synchronization” method to ensure the successful completion of the capping work. The project innovatively adopted segmented construction and made maximum use of slipway resources, optimizing and combining large-scale lifting operations more than 20 times, thus creating a new \"large-section installation\" model for jacket structures. Next, the jacket will enter the stage of commissioning of the auxiliary structures, and the project team will continue to focus on safety and quality management to ensure that the project is delivered on time and to a high standard.