The Innovation Design And Critical Technologies Study Of Espcp System Based On Demand Of Increasing Submersible Depth

Electrical-submersible-motor driven progressing cavity pumping (ESPCP) system has been widely used in various fields, with their unique advantages of low energy consumption and high efficiency, have great market potential and good development prospects. With the continued exploitation of oil fields, the increasing of the submersible depth has become an inevitable trend, and appeal higher and higher requirements of performance and life indicators of the oil system. Therefore, the innovation design study of ESPCP system with advanced innovation theory, which facing to the actual needs of deep submergence conditions, has important theoretical and practical value. This kind of study can help to effectively solve the axial load problem of ESPCP system, improve the system's adaptability, and ultimately promote the promotion and progress of ESPCP technology.Based on comprehensively discussing on ESPCP technology development in domestic and international, the major problems of the ESPCP system facing the increase of the submersible depth are analyzed in this paper, then the system's axial load problem is established as a main object of study. And a well-known innovation method- TRIZ (Theory of Inventive Problem Solving) is introduced, as a guide theory of innovation to ESPCP system.Through disserting the basic principles and framework of TRIZ, a general process of problem-solving with TRIZ and principles of selecting the main tools are refined, and the function and demand of ESPCP system are analyzed with TRIZ theory. And then, based on the substance-field analytic method, the innovative substance-field mold of ESPCP system is established, also the macro-ideas of "introducing a new field" is established, and the foundation of seeking innovative solutions has been developed.According to the actual needs on increasing of submersible depth, conflicting and contradiction analysis are performed. And the parameters of physical and technical contradictions are standardized based on the computer-aided innovation software Pro/Techniques5.0, later the right principles of invention for ESPCP system are found on application of Contradiction Matrix. Then the mold of innovation to ESPCP system is developed after comprehensive analysis, and the concrete design program is established ultimatelyAccording to the deep analysis on generation mechanism and relative factors of axial force of ESPCP, the computation module of ESPCP system's axial load is established, which is based on the correlation theory of viscoelastic hydromechanics. And then, the distinguish on bearing load and indicators of life between primary configuration and new system are evaluated as comparison, based on the calculation model of axial force, the effectiveness and value of innovative design to ESPCP system are well verified.Finally, facing the additional critical technology problem of new ESPCP system, that may encounter in condition of increasing submersible depth, several problems such as system start, anti-reverse after stop are discussed and studied briefly, and some measures such as starting with frequency converter, withhold fluid with directional valve are proposed. All of these can considerably improve the ESPCP system's adaptive capacity, and some necessary references for further analysis or study are provided.