本文選題：深水鉆井 + 隔水管��； 參考：《中國石油大學(xué)(華東)》2015年碩士論文

【摘要】：隨著我國石油勘探作業(yè)水深的增加,深水鉆井隔水管系統(tǒng)在海洋油氣勘探開發(fā)過程中得到了越來越廣泛的應(yīng)用。由于海洋作業(yè)環(huán)境惡劣,當(dāng)鉆井作業(yè)過程發(fā)生故障時,為防止隔水管斷裂,必須緊急斷開與井口防噴器的連接,隔水管在緊急脫離后會向上反沖,若反沖得不到有效控制,將會嚴(yán)重損壞井口裝置及平臺設(shè)備。本文結(jié)合國家科技重大專項“深水鉆完井工程技術(shù)”子課題(2011ZX05026-001-05)“深水鉆井隔水管作業(yè)管理及安全評價技術(shù)”,進行隔水管反沖控制系統(tǒng)的研究,為我國深水鉆井作業(yè)過程中隔水管系統(tǒng)的安全保障提供參考。本文所研究的隔水管反沖控制系統(tǒng)主要由隔水管張緊系統(tǒng)、反沖閥、隔離閥和PLC自動控制系統(tǒng)組成。在對深水鉆井隔水管反沖機理及防反沖控制基礎(chǔ)進行分析的基礎(chǔ)上,針對直接作用式隔水管張緊系統(tǒng)工作過程中反沖控制系統(tǒng)各組件的特性建立反沖控制系統(tǒng)的數(shù)學(xué)模型,基于MATLAB建立反沖控制系統(tǒng)的仿真模型,分別采用PID和模糊PID控制算法進行仿真研究,仿真結(jié)果表明基于模糊PID控制算法的仿真模型控制精度更高�；赟7-300系列PLC制定深水鉆井隔水管反沖控制系統(tǒng)的整體控制方案。根據(jù)反沖控制系統(tǒng)的控制要求及特點,進行PLC等設(shè)備的選型及硬件電路設(shè)計,完成隔水管反沖控制系統(tǒng)的軟件設(shè)計,軟件系統(tǒng)包括信號采集處理、隔水管緊急脫離判斷、控制液壓油流速、控制系統(tǒng)氣體體積及系統(tǒng)故障報警等模塊,設(shè)計基于PLC的模糊PID控制算法,以實現(xiàn)深水鉆井隔水管緊急情況下的成功脫離、反沖發(fā)生時的有效控制、故障發(fā)生時的準(zhǔn)確實時報警等功能,并模擬實現(xiàn)了鉆井隔水管緊急脫離時的反沖控制功能。設(shè)計基于WinCC的反沖控制系統(tǒng)的監(jiān)控界面,通過WinCC與PLC之間的通訊,實現(xiàn)對反沖控制系統(tǒng)的實時監(jiān)控及故障檢測報警等功能。
[Abstract]:With the increase of water depth in petroleum exploration in China, deepwater drilling riser system has been more and more widely used in offshore oil and gas exploration and development. In order to prevent the breakage of the riser, the connection to the blowout preventer at the wellhead must be disconnected urgently when the drilling operation is in bad condition. The riser will backwash upward after an emergency detach, and if the backwash is not effectively controlled, Will seriously damage wellhead installations and platform equipment. In this paper, combined with the national scientific and technological project "Deep Water drilling and completion Engineering Technology" (2011ZX05026-001-05) "Deepwater drilling riser operation management and safety evaluation technology", the research on backwash control system of water riser is carried out. It provides a reference for the safety guarantee of the riser system in the process of deep water drilling in our country. The backwash control system of the riser studied in this paper is mainly composed of the riser tensioning system, the recoil valve, the isolating valve and the PLC automatic control system. Based on the analysis of recoil mechanism and backwash control foundation of deepwater drilling riser, the mathematical model of backwash control system is established according to the characteristics of each component of backwash control system in the working process of direct-acting riser tensioning system. The simulation model of recoil control system is established based on MATLAB. The simulation results show that the simulation model based on fuzzy pid control algorithm is more accurate. Based on S7-300 series PLC, the whole control scheme of backwash control system for deep water drilling riser is established. According to the control requirements and characteristics of recoil control system, the selection of PLC and other equipment and the design of hardware circuit are carried out, and the software design of backwash control system of riser is completed. The software system includes signal collection and processing, emergency escape judgment of riser. The fuzzy pid control algorithm based on PLC is designed to control hydraulic oil flow velocity, control system gas volume and system fault alarm module, so as to realize the effective control of escape and backwash of deepwater drilling riser in emergency. The function of accurate and real time alarm when the fault occurs, and the backwash control function of drilling riser during emergency breakaway is simulated. The monitoring interface of recoil control system based on WinCC is designed. Through the communication between WinCC and PLC, the functions of real-time monitoring and fault detection and alarm of recoil control system are realized.
【學(xué)位授予單位】：中國石油大學(xué)(華東)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TE951

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本文編號：2095079