The installation of the oil and gas pipeline for the second phase of the "Deep Sea One" project has been completed. The submarine | pipeline | oil and gas

Release time:Apr 13, 2024 22:46 PM

On the noon of June 22nd, in the Lingshui area of Hainan, with the termination of head entry, the key control project of the second phase of the "Deep Sea One" atmospheric field project - the laying of a 20 inch diameter and total length of about 115 kilometers of submarine oil and gas long-distance pipeline - was completed, marking an important breakthrough in China's deepwater long-distance pipeline construction capacity and deepwater equipment technology.

The second phase of the "Deep Sea No.1" project is about 130 kilometers away from Sanya, Hainan, located between the Yacheng 13-1 gas field and the "Deep Sea No.1" energy station. The maximum operating water depth in the area is nearly 1000 meters, and the proven geological reserves of natural gas reach 50 billion cubic meters. After being put into operation, the peak annual production of the "Deep Sea No.1" atmospheric field can be increased from 3 billion cubic meters to 4.5 billion cubic meters, becoming an important gas source to ensure China's energy security.

Submarine pipelines are the lifeline for ensuring the smooth transportation of offshore oil and gas. The Phase II project of "Deep Sea One" is located in a deepwater high-pressure gas field. The oil and gas extracted from the formation have complex composition, high temperature, and high pressure. Conventional materials of submarine pipes cannot meet production needs. China National Offshore Oil Corporation (CNOOC) has for the first time applied the combination scheme of "114 kilometers of deepwater large-diameter seamless steel pipes+1.5 kilometers of deepwater bimetallic composite pipes" in a deepwater environment, building the "aorta" connecting the oil and gas transportation of the "Deep Sea One" Phase II project.

This underwater pipeline is specially designed for the mixed transportation of high-temperature, high-pressure, and strongly corrosive oil and gas flow. The pipeline is designed with a pressure of up to 38.8 megapascals and can transport oil and gas flow at a high temperature of 120 degrees Celsius. The maximum wall thickness reaches 38 millimeters, setting a new record for the wall thickness of China's offshore pipelines. "Hou Jing, Chief Engineer of the Phase II Project of Deep Sea One, introduced: 'We have collaborated with domestic manufacturers to optimize chemical composition, adopt high-precision rolling technology and advanced heat treatment technology, meet the requirements of high strength and high toughness indicators, achieve the full process of research and development and manufacturing localization, and provide strong support for China's ultra deep water oil and gas development equipment.'"


The installation of the oil and gas pipeline for the second phase of the "Deep Sea One" project has been completed. The submarine | pipeline | oil and gas

This is the first 3000 meter deep-water pipe laying crane ship in Asia, "Offshore Oil 201".

The geological conditions in the sea area where the Phase II project of Deep Sea One is located are very complex, which poses great challenges to engineering design, ship equipment capabilities, and offshore installation technology. Guo Qing, the general contracting project manager of the "Deep Sea No.1" Phase II project of CNOOC Engineering, introduced that the project team has successfully solved world-class submarine pipeline engineering technical problems such as ultra long and ultra high suspension spans through extensive calculation and analysis. They have also made adaptive modifications to the key equipment of the main operating ship "Offshore Oil 201", independently developed the first set of fully automatic welding equipment technology for large-diameter and large-wall thick offshore pipelines in China, achieved more than 10 technological breakthroughs, and created a record of 2.65 kilometers per day for the laying speed of 20 inch deep-water pipelines during construction.

It is reported that China has laid over 9000 kilometers of offshore oil and gas pipelines. After years of technological research and development, China has built a pipeline laying vessel equipment represented by the first 3000-meter deepwater pipeline laying crane ship in Asia, "Offshore Oil 201". It has independently mastered core key technologies such as the design, efficient installation, emergency response, and maintenance of submarine oil and gas pipelines under harsh sea conditions and complex landforms. Its operational capabilities have spanned from shallow and deep water to ultra deep water, and it has achieved full coverage of mainstream submarine pipeline types such as single layer, double layer, counterweight, sub main pipe, and steel suspension chain riser.

Two women were stabbed to death and reported to have committed a crime 4 days before the follow-up visit for schizophrenia. Suspect of a bloody murder case in a Hong Kong shopping mall appeared in court today. Male | Last Friday | Murder case
Two women were stabbed to death and reported to have committed a crime 4 days before the follow-up visit for schizophrenia. Suspect of a bloody murder case in a Hong Kong shopping mall appeared in court today. Male | Last Friday | Murder case

According to Hong Kong's Wen Wei Po, a bloody knife stabbing case occurred at Hollywood Square in Diamond Hill last Friday. The police arrested a 39 year old man on suspicion of stabbing two young women, one of whom was stabbed over 30 times. The suspect appeared in the Kwun Tong Magistrates Court this morning. The police at the Kwun Tong Magistrate's Court temporarily charged the suspect with two counts of murder last Sunday. The suspect appeared in court this morning at the Kwun Tong Magistrate's Court. Acting Chief Magistrate Zheng Jihang, after listening to the opinions of both the prosecution and defense, decided to postpone the hearing for two weeks until 9:30 am on June 19th, waiting for two psychiatric expert reports to be obtained. The defense did not object. Zheng Jihang approved the application, and the defendant needs to be temporarily detained at Xiaolan Mental Hospital. When the suspect appeared in court, he wore black framed glasses, a light gray shirt, and camouflage green shorts, and was able to answer the judge's questions normally. accordingly

Secretary of the Provincial Party Committee: The focus of Henan's "summer harvest" has shifted to agricultural machinery in the northern region of Henan Province. | Support | Science | Organization | Province | Northern Henan | Summer Harvest | Rush Harvest
Secretary of the Provincial Party Committee: The focus of Henan's "summer harvest" has shifted to agricultural machinery in the northern region of Henan Province. | Support | Science | Organization | Province | Northern Henan | Summer Harvest | Rush Harvest

Currently, the highly anticipated summer harvest work in Henan has shifted its focus to the northern region of Henan. According to the Henan Daily client, on June 4th, Lou Yangsheng, Secretary of the Henan Provincial Party Committee, presided over a special video scheduling meeting on the "Three Summers" work in the province, listened to the situation report, analyzed and judged the situation, and arranged and deployed the next steps of work. Governor Wang Kai made specific arrangements. On the evening of May 31, 2023, in Xiafutou Village, Xuliang Town, Boai County, Jiaozuo, Henan Province, villagers braved light rain in the wheat fields to harvest wheat. Visual China Map Lou Yangsheng pointed out that the current summer harvest battle in the province has entered the decisive stage. Doing a good job in summer harvest in northern Henan Province is related to the summer grain yield and seed safety. We should focus on seizing opportunities and make every effort to organize the wheat harvesting work in the northern Henan region, minimize losses, and protect the interests of farmers to the greatest extent possible. Accurate forecasting is essential

Xinhua All Media+| Welcome home! What innovative technologies are protecting the return journey of Shenzhou 15? Spaceship | Shenzhou | Technology
Xinhua All Media+| Welcome home! What innovative technologies are protecting the return journey of Shenzhou 15? Spaceship | Shenzhou | Technology

On June 4th, the return capsule of the Shenzhou-15 manned spacecraft successfully landed at the Dongfeng landing site. Astronauts Fei Junlong, Deng Qingming, and Zhang Lu all safely and smoothly exited the spacecraft, and the Shenzhou-15 manned flight mission was a complete success. What innovative technologies are there to safeguard the return journey of Shenzhou 15 in this mission? On June 4th, the return capsule of the Shenzhou-15 manned spacecraft successfully landed at the Dongfeng landing site. Xinhua News Agency reporter Lian Zhen photographed that "the sky and the ground" ensure the high-precision return of spacecraft. For the Shenzhou series spacecraft, the return and re-entry GNC technology is directly related to the life safety of astronauts. Taking the success of this return mission as a symbol, China has comprehensively upgraded its GNC system since the Shenzhou-12 manned spacecraft, which features autonomous rapid rendezvous and docking, autonomous adaptive prediction and re-entry return guidance, and has completed a comprehensive update and replacement

The Chinese naval fleet has arrived! Assembly | Navy | Chinese Fleet
The Chinese naval fleet has arrived! Assembly | Navy | Chinese Fleet

At noon today, a Chinese naval fleet consisting of Zhanjiang and Xuchang ships arrived at the assembly area of the "Comodo-2023" multinational maritime joint exercise. It is understood that the assembly anchorage for this exercise is 3 nautical miles long and 1.5 nautical miles wide, capable of anchoring up to 50 ships. Naval vessels from various countries participating in the exercise will also arrive at the anchorage today to complete the assembly of the "Komodo 2023" multinational maritime joint exercise, which is held every two years by the Indonesian Navy. This year is already the fourth edition of the exercise. The exercise will be held from June 5th to 8th in the city of Jakarta, South Sulawesi Province, Indonesia, including the port and sea phases. In the coming days, participating navies from various countries will participate in ship reading style search and rescue exercises, maritime interception and damage management exercises, aerial exercises, and other course objectives exercises

New comment: Donkey like "morale" limit pulls US debt "bomb" fuse hard to dismantle US | debt | morale
New comment: Donkey like "morale" limit pulls US debt "bomb" fuse hard to dismantle US | debt | morale

On the evening of June 1st, the US Senate passed a bill on the federal government's debt ceiling and budget, and the flame of the US debt bomb was temporarily extinguished at the last moment. The two parties in the United States have staged an extreme tug of war over the US debt bomb. Some experts believe that the US debt crisis is the result of the reckless politics promoted by the US dollar hegemony, and the underlying cause of this crisis is the highly polarized political system of the US. Since the end of World War II, the US Congress has adjusted the debt ceiling more than a hundred times. The recurring debt crisis will not only have a catastrophic impact on the US economy and people's livelihoods, but also continuously erode the value of US dollar assets such as government credit and US bonds, bringing significant and far-reaching impacts to the global economic landscape. 【