自动垂直钻具液控导向机构的研制与动力学特性分析  

Development of Hydraulic Controlled Steerable Mechanism of Automatic Vertical Drilling Tools and Its Dynamics Characteristic Analysis

作　　者：卢志芳[1] 刘白雁[1] 

机构地区：[1]武汉科技大学机械自动化学院,湖北武汉430081

出　　处：《机床与液压》2009年第11期74-77,共4页Machine Tool & Hydraulics

基　　金：国家自然科学基金项目(50574070);国家863重大专项(2006AA06A102)

摘　　要：针对石油自动垂直钻井研制出一种能长期工作于井下并产生主动纠斜力的微型液压动力系统,即液控导向机构。它集液压动力源(油泵、油箱、溢流阀等)、控制元件、执行元件于一体,且系统结构紧凑、尺寸微小、耐井下恶劣环境,并可直接在井下提取纠斜所需的动力。结合理论建模和仿真分析,探讨了该液控导向机构在不同工况下的动力学特性,特别是机构中的控制元件,即微型电磁阀的特性对系统动力学特性的影响。仿真和实验表明,液控导向机构井下纠斜动作的可控性与钻杆的转速有关,只要最大转速下纠斜系统产生的最大流量符合要求,液控导向机构就能可靠工作。A hydraulic controlled steerable mechanism of automatic vertical drilling was developed, which is a micro-hydraulic system and can work for a long-term in the well and generate automatic anti-deviation power. It integrates the hydraulic power source （pumps, tank, relief valve, etc）, control components and implementation components, has compact system structure, tiny dimension and tolerance for hard environment in the well. It could extract the power needed by anti-deviation in the well. The dynamic characteristic under different conditions of this hydraulic controlled steerable mechanism was discussed with the combination of theoretical modeling and simulation analysis, the effect of the characteristic of micro-electromagnetic valve on the system＇s dynamic characteristic was analyzed. Simulation and experiment indicate that the controllability of anti-deviation action of hydraulic controlled steerable mechanism in the well is related to the rotational speed of drill stem. The hydraulic controlled steerable mechanism would work reliably, as long as the maximum flux which is generated by the anti-deviation system in the maximum rotational speed time is satisfactory.

关 键 词：垂直钻井 液控导向机构 液压动力系统 动力学仿真 

分 类 号：TE249[石油与天然气工程—油气井工程]