CNOOC leak points weaker flame began maintenance work

Data Figure: The figure, the leakage of natural gas to promote water the formation of water column (December 19, photo). The figure, in order to prevent pipeline explosions, Zhuhai authorities ignited gas leak in the sea (December 20 photo).

Xinhua Zhuhai, December 23 (Reporter Wei Meng) 23 am, CNOOC has commenced on the Shenzhen Branch of CNOOC Zhuhai sea submarine pipeline leak repair work. The same morning, the Shenzhen Branch of CNOOC organization, the reporter came by boat from the leak point at 400-500 m, on-site flame height has been significantly reduced, aircraft, vessels remain on high alert, the sea was no oil, nor see dead fish dead shrimp.

day 9:50 Xu, reporters arrived at the northwest corner of Hengqin Island of Zhuhai City, Shenzhen Branch of CNOOC Zhuhai terminal. At this point, the torch at the end of the decompression did not see the fire has been. “22 the evening, an engineering ship has been anchored near the success of the leak, ready to begin operations, divers near the location of the leak has been carried out preliminary exploration work and found that the water is clear, the basic operation for 23 am, undersea natural gas pipelines pressure has been reduced to fit the state of repair, the morning, continue to the sea terminal in Zhuhai tube into the nitrogen. “CNOOC’s Shenzhen Branch 党办 director Lin Zhongming said.

in carrying the reporter’s “drag Zhuhai 0133″ road round to the leak process, the reporter saw one project after another ship and guard ships, boats, about 200 meters away from the leak point there is a observation ship. Once the ship should Yuanlin told reporters, no flame, when stirred by the leakage of natural gas up to 3-4 m water column, a flame, the flame burned high at first, but is now significantly reduced to 2 meters.

500 meters away from the flames, the crew discover the measuring line with a water depth of berth depth of only 4 meters. They also discover the instruments here are the oxygen content of air within the normal data. “We do not see the phenomenon of oil spills, but also did not find any dead fish dead shrimp, after all, the leakage of natural gas, is generally not contaminated.” 19 After the accident near the scene of the forest should be repeated once said.

morning, the scene of the wave height of 1-1.5 meters, wind 5-6, but in the reporters is 11:40 promised land, the coincidence of the point of being ready to leak a group of divers. A diver, said: “Although the wave temporarily with diving and wind conditions, but we still want to wait for the right time in the field.”

day 14 am, divers who dive into the sea. “Divers operating in the repair pipeline will play a crucial role in Zhuhai has been developed according to the pipeline closure program, the repair work is divided into three stages of the first stage is the relief phase, and the nitrogen delivery to the damaged point, send an inert nitrogen into the possession of two purposes, first, to prevent water entering the pipeline, the second is to maintain a certain pressure points to help divers find the damage; to be the remnants of the sea tube was replaced with nitrogen gas, after all the second phase, sea exploration by divers, and find the cause of damage, while the use of temporary closure measures; the third stage, the leak about 2 km upstream of the location to build dry storage isolation upstream pipe, then cutting off the already damaged part, and replace the old pipe with new pipe. “CNOOC Panyu, Shenzhen Branch Manager of Qiu Daqing field operations, said.

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