Research On The Key Technologies Of Integrated Monitoring And Control System For Deepwater Drilling Rig

Deepwater drilling rig is the key equipment of offshore oil and gas development.Integrated monitoring and control system of deepwater drilling rig is the key component which is a complex giant system with the function of control,surveillance and monitor,and plays an important role in safe and efficient deepwater drilling.It demands higher reliability because of marine environment.With the increasing number of corollary equipment of deepwater drilling rig system and the improvement of subsystems automation,it becomes more difficult to integrate monitoring,surveillance and controlling of rig system.At present,the development technologies of the integrated monitoring and control system of deepwater drilling rig are controlled by Europe and America.Therefore,research on the key technologies and theories of the integrated monitoring and control system of deepwater drilling rig with independent intellectual property possesses a strategic significance.Supported by the National High-Technology Research and Development Program of China(863 Program),the dissertation focuses on the optimal study of the integrated monitoring and control system of deepwater drilling rig applied on the semi-submersible drilling platform(water depth of 3000 m,drill depth of 10000m).Firstly,the overall scheme design of the integrated monitoring and control system of deepwater drilling rig is proposed.Due to the special nature of deepwater drilling,the nonfunctional requirements and functional requirements of the system are studied with an analysis of the factors of the integrated monitoring and control system of deepwater drilling rig.The functions and structures of the system are studied and the partition of functional modules is proposed.The special function modules are analyzed.The hierarchy of system function construction is divided into different level,and the design of physical and logical architecture is accomplished.This article proposes an overall structure of integrated monitoring and control system of deepwater drilling rig based on industrial Ethernet and the development of man-machine interface is completed.Secondly,the optimal study of reliability redundancy allocation of the integrated monitoring and control system of deepwater drilling rig is carried out.The using of the redundant method in improving the reliability of the system leads to the increase of cost,volume and weight,therefore,series parallel and parallel series connection structures are compared and analyzed.The multi-objective optimal allocation of reliability redundancy is studies aiming at reliability,cost,volume and weight.As the diversity of element and component,and the uncertain of redundancy’s number,an GAG1-IASGA is proposed using the hybrid algorithm strategy.According to comparative analysis of GAG1-IASGA and other algorithms,the multi-objective optimal allocation of reliability redundancy scheme is achieved,which provides an important reference for reliability optimization design of the integrated monitoring and control system of deepwater drilling rig.Then,the optimal study of network allocation of the integrated monitoring and control system is carried out.Because the local network congestion affects the performance of the whole network,the net structure of the integrated monitoring and control system of deepwater drilling rig is analyzed and researched.Aiming at decreasing total traffic and balanced traffic distribution,the optimal allocation of the integrated monitoring and control system network of deepwater drilling rig is studied,and an APSO-GA hybrid algorithm based on simulated annealing algorithm is proposed.The multi-objective network optimal allocation scheme is made,which is according to the results compared with other algorithms.The scheme provides theoretical basis for optimal design of the integrated monitoring and control system network of deepwater drilling rig.Finally,according to the optimized scheme of this thesis,the network testing experiment platform of integrated monitoring and control system of deepwater drilling rig has been constructed,and the testing methods,means and tools of network system have been explored.According to the national regulations,the system has been debugged,and also the testing of redundant function of CPU,the server,one-way loop network communication,double loop network communication,loop network coupling,power source and so on,have been conducted.The testing of control function and remote monitoring function has been carried out through a typical test case.The testing and analysis of the network performance,such as the connectivity,the redundancy self-healing properties,network latency,latency jitter,packet loss rate,throughput capacity,etc.have been completed.The results proved that the faster performance,real-time performance,stability and reliability of the system network transmission,and the rationality and validity of the optimization design.The results also provided effective proof for optimizing the network structure and configuration,and improving system network performance and also provided technical supporting for more effective management of network performance.