Bi J.M.,China offshore Oil Engineering Co.
Advanced Materials Research | Year: 2014
KONIAMBO project affiliated to the OFFSHORE OIL ENGINEERING CO., LTD is the world's first smelting plant using large modular construction and integration, which is the first integrated, modular building project with many potential risks.In this paper, project risk management system, control method and requirements were built based on risk matrix assessment method, potential risks in each stage and aspect were evaluated, controlled and managed,then risk management guarantee is provided for KONIAMBO project implementation. © (2014) Trans Tech Publications, Switzerland.
Li S.M.,China offshore Oil Engineering Co.
Advanced Materials Research | Year: 2014
The structure needs to be lifted-off from the ground during the weighing progress. For that the weighing fulcrum and the building fulcrum are different and the building fulcrum is fewer usually and the weighing system has some asynchronism during the lifting process of the structure, it is very important to measure the stress of the key points of the structure during the weighing progress. The paper uses finite element analysis to get the stress sensitive of the weighing device while weighing and uses the optical fiber sensor technology to measure the dynamic stress. Through the experiment with the weighing test bench show that the optical fiber sensor technology has a clear advantage to the traditional resistance strain gauge technique. © (2014) Trans Tech Publications, Switzerland.
Li S.,China offshore Oil Engineering Co.
Applied Mechanics and Materials | Year: 2012
At present, as the increasing of ultra-large structures, the contradiction that domestic lifting equipments can not meet the requirement of ultra-large structure's lifting has become increasingly prominent. Based on the need of ultra-large steel structures (offshore oil platforms) jack-up, using strength theory and finite element analysis, a hydraulic continuous jack-up system for ultra-large structures' jack-up was studied in this article. A new control system, which combines mechanics, hydraulics and electrics, was presented. More particularly, the modules of speed control and multi-cylinder synchronous control for the ultra-large structure's lifting was designed. In the WINCC environment, a human-computer interface (control software) was developed by VB to achieve the system's real time monitoring and synchronization control. All movements of the jack-up system could be controlled through the software. To conclude, the jack-up system consists of two parts: the mechanical support structures and the control system. The former can assure great height (10m or more) jack-up, and the later can accomplish multi-point (more than 4 points) synchronous jack-up. © (2012) Trans Tech Publications, Switzerland.
Lu M.,Jingdezhen Ceramic Institute |
Wei X.,China National Petroleum Corporation |
Su Y.,China offshore Oil Engineering Co.
Desalination and Water Treatment | Year: 2011
This paper investigated the use of Bacillus coagulans W-15 immobilized on carriers in a bio-contact oxidation reactor to treat oilfield produced water. It researched the effect of hydraulic retention time (HRT) on the removal efficiencies of chemical oxidation demand (COD) and total organic carbon (TOC). The results showed that, when the HRT was 24 and 32 h, the COD of effluent water were less than or equal to 352 mg/L, the removal efficiencies of COD and TOC were greater than or equal to 75% and 68%, respectively. The degradation efficiencies in the bio-contact oxidation reactor immobilized with W-5 were estimated to be 73% for total oil, and 86% for the gas chromatography resolved compounds. The quality of the effluent water met the professional emission standard of petrochemical industry of China. © 2011 Desalination Publications.
Tianfeng Z.,China University of Petroleum - Beijing |
Xianhong F.,China offshore Oil Engineering Co.
Ocean Engineering | Year: 2015
An upheaval buckling solution is proposed using a preheating method combined with constraints from two segmented ditching constructions, which are scheduled before and after preheating. In this solution, some selected pipe segments along the route were curve-laid and preserved resting on the seabed in the first ditching construction, while other straight segments were trenched. The subsequent hot water flushing operation induced the curve-laid segments to buckle on the seabed, and then these prebuckles were laterally constrained by the second ditching operation carried out during preheating. After preheating, the cooling rebound of these prebuckles was constrained by the new trenches, and axial pretension was induced in the pipe wall to offset the axial compression in service and upgrade the thermal stability of the entire pipeline. A detailed design approach is provided in this paper, and corresponding Finite Element Model (FEM) verification is given for an example pipeline. © 2015 Elsevier Ltd. All rights reserved.