Research On Intelligent Communication System Of Oil Well Based On Self-powered Energy Technology

With the development of society,the human society's demand for oil as an energy source is also increasing.In order to reduce the risk and cost of oil exploration,oil systems are gradually developing in the direction of informatization and intelligence.However,the current intelligent oil communication system faces two important problems: the first is the problem of downhole energy supply.The second is the problem of downhole communication.Currently,the most widely used mud pulse telemetry technology,the data transmission rate is too slow and can reach about 40 bps/s,which seriously affects the efficiency of real-time communication.Aiming at the above two problems,this thesis combines the self-powered environmental energy harvesting technology with a low-power communication system to design a self-powered intelligent oil communication system to solve the energy supply and communication problems in the harsh underground environment.In the aspect of downhole energy supply,this thesis uses the non-contact vibration power generation of the pipe wall,and designs a hybrid power generation structure of piezoelectric and triboelectric power generation based on the cantilever beam structure.In the aspect of downhole communication,this thesis proposes a hybrid relay data transmission method of wired and wireless.The communication part adopts low power consumption design,which reduces the power consumption of the communication system as much as possible.In this thesis,low-power consumption technology and self-powered technology are combined to design a self-powered intelligent oil and gas communication system,which realizes the non-contact vibration energy acquisition and downhole real-time communication of the intelligent while drilling system.The main research contents of this thesis are as follows:1.Based on piezoelectric nanogenerator(PENG)and triboelectric nanogenerator(TENG)environmental energy harvesting technology,which can effectively collect vibration energy,the hybrid power generation system can effectively improve the power generation efficiency.This thesis adopts the hybrid power supply mode of piezoelectric and triboelectric.2.The self-powered piezoelectric-friction hybrid power generation system is introduced from three aspects: working principle,structural design and output performance.The piezoelectric power generation module uses lead zirconate titanate piezoelectric ceramic sheet(PZT),and the friction power generation module uses two friction materials,polytetrafluoroethylene(PTFE)and polyvinyl chloride(PVC).In this thesis,a rectifier circuit is built to compare and analyze the output performance before and after rectification under the three conditions of piezoelectric,triboelectric,and hybrid power generation.The conclusion is that the hybrid power generation module combines the advantages of high PENG current and high TENG voltage,and the output performance is high.Compared with the single power generation mode,the output performance of the hybrid power generation module has a certain improvement3.Based on the research on the charging capacity of the three power generation modes of PENG,TENG and hybrid power generation,the energy supply and demand of the communication system is studied.The energy charged by the hybrid power generation system to the capacitor continuously supports the normal operation of the communication system.The designed self-powered communication system adopts the underground relay communication method combining wired communication and wireless communication.High-speed communication of intelligent oil and gas systems can be realized based on self-powered technology.