As we all known, the structure and relationship of the world energy supply are changing frequently, especially the continuous recession of the international oil price so that the requirements for controlling the production costs and improving the safety management are increasing prominently in the production process. So it is necessary to improve the Design Theory & Methods and Simulation Technology for oil and gas equipment, drilling and completion tools, monitoring and controlling system. This special issue is to improve the dissemination of advanced research in the area of design and simulation technology that can fulfill to improve the reliability and reduce the cost of research and development. Original research papers are solicited in any aspect of innovative Design Theory & Methods and Simulation Technology.

Aims and Scope:(Topical that are within the scope of the special issue include, but are not limited to)
Modern Mechanical Design Method and Theory
Optimization Design Method
Research on Simulation Model and Method
Design and Simulation of Electromechanical Control System
Design and Simulation of Monitoring System
Design and Simulation of Sealing Structure
Design and Simulation of Hydraulic System
Fracturing Vehicles, Equipment and Tools
Design and Simulation Analysis of Completion Tools
Simulation and Analysis of Drill String System and Drill Bit