The deep-sea scientific drilling vessel CHIKYU, owned by the Japan Agency for Marine-Earth Science and Technology (JAMSTEC) and provided to the Integrated Ocean Drilling Program--jointly funded by Japan and the United States--has recently undergone successful testing operations, according to JAMSTEC-CDEX Director-General Asahiko Taira. Successful performance results are now available for the Blow Out Preventer (BOP) handling System Integration Test (SIT). Dr. Taira also reported successful piston-coring operations (part of the BOP-SIT), including recovery of two piston cores, i.e. cylindrical sediment samples taken from strata using a hydraulically actuated piston corer (Hydraulic Piston Coring System: HPCS). HPCS is used for sampling mud and sand from geological layers beneath the seafloor.
JAMSTEC conducted ship-steering training using the Dynamic Positioning System (DPS), as well as training in deploying and retrieving transponder signals, the acoustic locator off Nagasaki, Suruga Bay, and Boso Peninsula. During two test periods (Oct. 10–Dec. 1, off Shimokita Peninsula, and Dec. 4–Dec. 12, off Suruga Bay), the following CHIKYU systems/equipment were tested to confirm performance:
"These results confirm the basic performance of the drilling equipment and that the CHIKYUs systems meet our expectations and are ready for upcoming, full-scale drilling operations," declared Dr. Taira. "Testing enabled us to acquire new information to facilitate CHIKYUs safe and smooth operation. Our plan is to move CHIKYU to Sukumo Bay in Kochi as a base port to conduct more tests, especially ship positioning."
The piston coring test was performed 60 kilometers to the east off Shimokita Peninsula from Nov. 22-28. Two piston cores, 50 meters and 70 meters long, respectively, were retrieved by HPCS from 1,200-meter water depths. JAMSTEC also conducted performance tests for research and core analysis systems onboard, using the recovered cores. To confirm the strength of strata for BOP supporting/landing during upcoming riser drilling in FY2006, measurements were made of whole 50-meter core share strength. As a result, said Taira, "We are confident that the strength of strata around this area is sufficient for BOP landing and successful riser-drilling."
Nancy Light | EurekAlert!
Greenland ice flow likely to speed up: New data assert glaciers move over sediment, which gets more slippery as it gets wetter
17.08.2017 | Swansea University
Climate change: In their old age, trees still accumulate large quantities of carbon
17.08.2017 | Universität Hamburg
Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.
As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...
Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.
Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...
For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.
While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...
An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.
The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...
A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.
Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...
16.08.2017 | Event News
04.08.2017 | Event News
26.07.2017 | Event News
21.08.2017 | Materials Sciences
21.08.2017 | Health and Medicine
21.08.2017 | Materials Sciences