The subsea connector for manifolds is working in bad conditions. The water environment is harsh. And the inner pressure of the jumper which is connected by the subsea connector is high. In this paper, a new design of metal gasket for the connector is proposed. The metal gasket develops a surface contact with the upper and lower hubs. Under the effect of internal pressure, the seal ring will expand outward to ensure good seal performance. The design has a simple structure, and is easy to manufacture and disassemble .This paper uses the finite element analysis to investigate the gasket’s performance in different working conditions, and provides reference for real tests and the engineering application.

Installation is the key technology of the deepwater vertical collet connectors. Based on thorough analysis of the existing installation technology and construction resources, combined with the technical features of installation used to connect different types of jumpers, new designs of vertical collet connectors installation for rigid jumpers and flexible jumpers are proposed in detail in this paper.

Subsea connector is one of the critical device used in the development of subsea wells. Analyzing the locking mechanism is important for the optimization design of it. An simple method based on freebody diagrams and simple friction theory is demonstrated to analyze the mechanical advantage of subsea connectors, which is mainly related to coefficient of sliding friction. The equation derived is plotted for different sets of friction coefficient to analyze their influences. It is demonstrated that the mechanical advantage(MA) is highest at friction coefficients near zero. Changes of a few range may alter connector clamping force by a significant factor.

Traditional studies suggest oil & gas resources clusters lack effective demand for innovation and resource endowments play the most important role in their development. In this paper, we analyzed the correlation of regional innovation networks and oil & gas resources clusters. Based on identification of oil & gas resources clusters in China by calculating location entropy, we did an empirical analysis on the correlation by using related panel data. It shows that resource-based clusters demand for innovation doesnt diminish at all. With oil and gas resources deep exploration, the demand for technology innovation increases, thus forming a strong and active regional innovation networks. In turn, effective regional innovation networks contribute to these clusters sustainable development.

Developing deepwater oil and gas resource is the trend of oil industry development. It is important to select a proper development scenario and riser system which works as a key tool to connect subsea equipment and surface body in a deepwater project. Based on the West Africa’s deepwater target field CNOOC owned, this paper designs a detailed development scenario-FPSO +SPS +Shuttle tanker according to the following factors: well, reservoir layout, environment, floaters availability, commercial considerations. Floater and riser selection interact with each other. Considering the development scenario, a basic method for selecting a proper riser system is presented. As a result, FSHR is selected from existing risers based on technology, reliability, risk and cost.