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China offshore Oil Engineering Co. and China National Offshore Oil Corporation | Date: 2013-10-01

A new jacket design method is disclosed, especially for deepwater water heavy jacket applications. The method utilizes a special type of air bags, called Ship Launching Air Bags (SLAB), to provide low cost temporary buoyancy used for jacket installation purpose only. A designer only needs to satisfy the jacket stiffness for the resistance of environmental and gravity loads without the consideration of jacket reserve buoyancy. The required jacket reserve buoyancy could be increased with the utilization of temporally attached SLABs during the jacket installation.

China offshore Oil Engineering Co. and China National Offshore Oil Corporation | Date: 2014-02-23

A new pneumatic load transfer and shock absorbing system is disclosed. The pneumatic system includes a layer of air-bags to perform two basic functions during a floatover installation operation: 1) lifting the platform deck from the support to create additional air gaps at the mating surfaces, and the heave motions of the lifted platform deck may be reduced; 2) performing as a shock absorbing device with variable vertical stiffness easily controlled by the air-bag internal air pressure during the mating operation and the separation operation.

Zhang J.,China offshore Oil Engineering Co.
Advanced Materials Research | Year: 2013

The H beam structure has high requirement for the force condition in weighing. The paper do a detailed analysis for the force condition of the cup support in the weighing procedure, through the design and finite-element analysis for the weighing cup support of the 3M101 module A12 cup support. Improves security and at the same time make the stress-strain in the weighing procedure in the allowable range. © (2013) Trans Tech Publications, Switzerland.

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 L.,China offshore Oil Engineering Co.
Applied Mechanics and Materials | Year: 2013

The paper is based on the construction of multi-module on the centralized venue. In the paper, the motion trajectory planning of an axis vehicle during transport is researched. By the trajectory algorithm called Dijkstra, the author makes an analysis of the shortest path during transport. The analysis not only can improve transport efficiency, but also can make the transport of the axis vehicle more scientific. © (2013) 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.

She Y.X.,China offshore Oil Engineering Co.
Applied Mechanics and Materials | Year: 2014

Nickel ore project is the first main part construct project of modular and integrate large smelter. This project includes fifteen modules and its total weight is nearly forty thousand ton and the biggest module is five thousand ton. Use trolley to lade the nickel ore module. Use interim landing stage and shipboard method to land the nickel ore module because of the depth of water. Calculating the three operating modes in the lading process, design the landing stage construct. Thereby lay the foundation to lade the module safely and smoothly. © (2014) Trans Tech Publications, Switzerland.

Bai N.,China offshore Oil Engineering Co. | Zhao D.,China offshore Oil Engineering Co.
Shiyou Kantan Yu Kaifa/Petroleum Exploration and Development | Year: 2011

In the traditional offshore pipe S-lay design, the modeling and configuration parameters adjustment of firing line are completed by manual way. However, the traditional design method costs a lot of time and labors, and can not work with stingers of complex structures. This paper illustrates a program developed to aid offshore pipe laying design. This program can provide precise model for any type of stinger of firing line of any geometry and calculate roller support coordinates automatically with optimized configuration. The program adopts finite element method to solve static offshore pipe S-lay problems, analyzes calculation results and selects the best configuration parameters of firing line. The whole design procedure can be completed automatically by this software. With the method, the efficiency of design increases greatly. An example of a stinger with two sections shows that labor and cost are decreased by 88% compared to the traditional method, and the new method can work with complicated stingers with even three or more sections, which cannot be realized with manual method.

Yang J.H.,China offshore Oil Engineering Co. | Yang G.S.,China offshore Oil Engineering Co.
Applied Mechanics and Materials | Year: 2014

According to the structural characteristic of LNG cryogenic storage tank concrete prestressed wall and heat transfer theory, the paper obtain the calculation formula of the temperature field distribution, emphasis studying the heat flux distribution along the radial and axial and node temperature distribution of the section nodes for a 160,000 m3 capacity LNG cryogenic tank by ABAQUS. The paper also establish a set of method which is suitable for the temperature field analysis, proof the feasibility of finite element analysis technique in the analysis of the LNG cryogenic storage tank, and have a certain reference for the prestressed concrete walls and insulation layer design of the large LNG storage tank. © (2014) Trans Tech Publications, Switzerland.

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