三维可视化HDD钻导向孔钻柱力学分析软件的研制与应用——以3300m长江天然气管道穿越工程为例

钻导向孔的成功与否是决定3 300m长江天然气管道穿越工程成败的关键,需要对钻导向孔的钻柱进行力学分析,提前判断钻柱的受力情况,并判断钻具组合是否满足施工要求。为此,综合利用传统的软钻柱模型和较新的ABIS模型,研发了HDD钻导向孔钻柱力学分析软件,可进行钻导向孔时钻柱的受力分析和三维图像显示。将该软件与国外常用的Ridgewood Software(RS)软件进行对比,从井口推力及井口扭矩来看,两者的计算结果很接近;同时还将该软件在某管道穿越工程中进行了模拟应用,将软件计算结果与实测数据进行了比较。结果表明:HDD钻导向孔钻柱力学分析软件能够很好地预测钻导向孔时钻柱的力学状态,并能用三维图像直观地显示导向孔内钻杆的变形与应力分布情况。该软件的成功研制与应用,为长江3 300m天然气管道穿越工程钻导向孔的钻具组合提供了技术支持,其国产化对管道穿越工程钻导向孔的设计和大规模的工程应用奠定了基础。

A mechanical analysis software with 3D visual display and its application to pilot hole drilling in the Jiangyin Yangtze River Crossing Project 3300 m HDD

The success or failure of the pilot hole drilling is fundamentally important for the Jiangyin Yangtze River Crossing Project 3300 m HDD, a new world record in this field. At the pilot hole drilling stage, a mechanical analysis on the drill pipes is quite necessary for engineers to determine the stress on the pipes and judge if the drill tool assembly will meet the drilling requirement. In view of this, based on the traditional soft drill string model and the latest ABIS model, an HDD pilot hole drilling pipe mechanical analysis software was developed with 3D image display. The calculated wellhead thrust and wellhead torque by this new software were almost in agreement with those by the commonly used Ridgewood Software (RS). Also this software was applied to a simulation process of an HDD project, and the calculated results were compared with the actual measuring results. The results showed that the newly developed software can not only predict the mechanical status of drill pipes but also through three dimensional images visually display the transformation and stress distribution of drill pipes in the pilot hole drilling. The successful development and application of this software provides a robust technical support for the drill tool assembly used for the pilot hole drilling in this project, and its domestication lays a foundation for the design and large scale engineering application of pilot holes in HDD projects.