Experimental study on the migration regularity of sand outside a large, deep-water, open caisson during sinking

2019 ◽  
Vol 193 ◽  
pp. 106601
Author(s):  
Bing-Nan Jiang ◽  
Meng-Ting Wang ◽  
Tao Chen ◽  
Lu-Lu Zhang ◽  
Jian-Lin Ma
RSC Advances ◽  
2019 ◽  
Vol 9 (56) ◽  
pp. 32873-32888 ◽  
Author(s):  
Xiao-fang Lv ◽  
Jiang-wei Zuo ◽  
Yang Liu ◽  
Shi-Dong Zhou ◽  
Da-yong Lu ◽  
...  

The formation and accumulation of hydrates in high pressure oil and gas pipelines bring great risks to field development and deep-water transportation.


2014 ◽  
Vol 535 ◽  
pp. 729-733
Author(s):  
Lei Liu ◽  
Qiang Liu ◽  
Li Cheng

Since oil phase materials, oxidizer, and water are important components of emulsion explosive, their influences on compression resistance performance of emulsion explosives in deep water was studied by using reusable experiment device to simulate the deep charging environment. The experimental results show that with the equivalent content of the oil phase material, the sequence of three oil phase types of emulsion explosives from good to bad in terms of compression resistance performance and explosion performance in deep water are composite wax, composite wax and machine oil, paraffin wax, vaseline and machine oil. With the equivalent content of oxidant, the type of oxidant species has quite small influence on compression resistance performance and explosion property. Within a certain range, water content has small influence on compression resistance performance, and explosion performance increases with the increasement of water content, while it significantly decreases with water content increasing to a certain amount.


2015 ◽  
Vol 120 (3) ◽  
pp. 2007-2049 ◽  
Author(s):  
Ho-Joon Lim ◽  
Kuang-An Chang ◽  
Zhi-Cheng Huang ◽  
Byoungjoon Na

Author(s):  
Hamid Alemi Ardakani ◽  
Mohammad Javad Ketabdari

Among the compliant platforms, TLP is a vertically moored structure with excess buoyancy, used for deep water oil exploration. In this structure tethers can be tensioned to such an extent that heave, roll and pitch motions of the platform induced by ocean waves are virtually eliminated. SeaStar is new generation of mini tension leg platforms which is similar to a spar and has favorable response features of a TLP. This paper illustrates the results of experimental work performed on a 1/100 scaled model of SeaStar TLP in a wave flume. The study refers to the induced tension in different tendons of the model and the motion response behaviour of the model on different degrees of freedom under several directional impinging random water waves. The results are presented in the frequency domain and the response amplitude operator for each motion of the platform has been calculated.


2016 ◽  
Vol 60 ◽  
pp. 155-163 ◽  
Author(s):  
Bo Zhou ◽  
Jin Yang ◽  
Zhengli Liu ◽  
Rongxin Zhou

2016 ◽  
Vol 46 (9) ◽  
pp. 094306
Author(s):  
HaiGang ZHANG ◽  
ShengChun PIAO ◽  
ShiE YANG ◽  
ChuanXiu XU

Author(s):  
Isaias Quaresma Masetti ◽  
Ana Paula dos Santos Costa ◽  
Gerson Beraldo Matter ◽  
Rodrigo Augusto Barreira ◽  
Sergio Hamilton Sphaier

Petrobras, through its Research Center and in cooperation with Universities and Research Institutes, has invested in the development of new concept of platform, aiming to minimize the movements of the structure to work in the field of oil and gas in ultra-deep water. One of these developments is related with a Mono-Column conception provided with a moonpool. In the OMAE2005 Conference, an experimental study of the behavior of this concept was presented, showing the influence of the diameter of the opening of the moonpool base in the heave and pitch motions. A new experimental program was carried out in LabOceano/COPPE/UFRJ, to study the influence of different skirts and the influence of variation of the external diameter along the vertical axis in the behavior of the monocolumn in waves. In this new experimental program a storage unit was tested.


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