On 29 September 2023, the world's first set of deep-sea sediment (combustible ice) pressure-retaining and heat preservation sampling/storage equipment independently developed by Academician Xie Heping's team was carried on board the 10,000-metre-class manned deep submarine "Striver" to complete the sea trial mission. The sea trial realised the active pressure preservation and thermal insulation acquisition of solid combustible ice samples at in-situ pressure temperature in the deep sea, which is the first time in the world, and is expected to crack the problem of in-situ exploration and development of combustible ice resources, and at the same time provide brand-new instrumentation and equipment for the in-situ pressure preservation and thermal insulation scientific research and engineering in the deep sea.
Promote marine science and technology to achieve a high level of self-reliance is an important strategic direction of our country. Academician Xie Heping led by Shenzhen University, Sichuan University team and Kingstone Drilling (Tangshan) Co., Ltd. team, based on the national major scientific research instrument development project "deep rock in situ fidelity coring and fidelity testing and analysis system" technical results, independent development of the world's first set of deep-sea sediment (combustible ice) pressure preservation and thermal insulation sampling/storage The equipment adopts the deep in-situ self-centering and analysis system. The equipment adopts self-triggered pressure preservation and active-passive joint heat preservation in deep-sea in-situ to keep the temperature and pressure of the samples in the whole process of coring and transfer consistent with the deep-sea in-situ, and is designed to have a pressure preservation capacity of 40MPa and a heat preservation range of 0~20℃. "(TS-36-2), after 8 hours of deep-diving operation, it successfully obtained solid deep-sea sediment/combustible ice samples with 14.5MPa in-situ pressure and 3℃ in-situ temperature in 1385m deep-sea, which overcame the technical difficulties of pressure-retaining sampling of deep-sea sediment (combustible ice) and filled the blank of deep-sea sediment (combustible ice) heat preservation sampling technology in the world.
Deep Sea Sediment Insulation and Pressure Retention Coring/Storage Equipment Launched
"It's an honour to be able to personally dive deep into the seabed and complete this historic moment." Associate Professor Chen Ling of the research team told reporters excitedly, "This sea trial successfully obtained solid combustible ice samples with in-situ temperature pressure in the deep sea, which verified the principle of pressure preservation and thermal insulation technology and working ability of our equipment."
Deep sea pressure preservation insulation sampling/storage equipment submarine coring operation
Academician Xie Heping's team focuses on China's deep-earth and deep-sea strategic science and technology direction, and has long been committed to deep in-situ fidelity coring and fidelity testing technology and equipment research, and has promoted China's deep resource and energy fidelity coring exploration and development technology from scratch to a qualitative leap. His team pioneered the development of the world's first set of deep-sea sediment (combustible ice) pressure preservation and insulation sampling/storage equipment, realising the world's first 1385m deep seabed to successfully obtain the in-situ pressure and temperature of solid combustible ice samples.
Xie Heping academician team undersea Mark
It is reported that in September last year, the team used the set of pressure-retaining insulation coring laboratory principle prototype, in the South China Sea 1370 metres water depth area to obtain maintain in situ pressure of 13.8MPa, temperature 6.51 ℃ of the flow state of the combustible ice (secondary hydrates) samples.
