On December 26, COOEC announced that the vessel Offshore Oil 201 successfully completed all subsea pipeline laying works for the first phase of the Qatar RUYA EPCI 09 Turnkey Project, as the final end closure was lowered into water.
As the largest-value Middle East subsea pipeline laying project undertaken by Chinese enterprises, the first phase of the RUYA Project involves 28 subsea pipelines with a total laying length of 137.88 kilometers. The pipelines come in 10 different sizes, featuring a maximum outer diameter of 26 inches and a maximum wall thickness of 20.62 millimeters.
During construction, the project adopted the internationally advanced automatic GMAW (Gas Metal Arc Welding) process. A total of over 11,000 weld joints were completed, with an overall weld length exceeding 14,000 meters and a one-time welding qualification rate of 97.36%. The peak pipeline laying speed reached 3 kilometers per day. In addition, 370 subsea structures were installed within 48 days. All works of the first phase were finished ahead of schedule.