【摘 要】
：
机械式自动垂直钻具具有耐高温、成本低和适用范围广等优点,其在深部资源勘探领域有广阔的应用前景,但纯机械式结构导致其纠斜精度易受外界环境的干扰.为进一步提高机械式自动垂直钻具的纠斜精度,对不同强度黏滑振动下钻具稳定平台的控制性能进行研究.首先,通过构建钻具稳定平台控制性能的数学分析模型,得到影响稳定平台控制性能的因素.然后,利用ADAMS(automatic dynamic analysis of mechanical systems,机械系统动力学自动分析)软件建立黏滑振动下钻具稳定平台的多刚体动力学仿真
【机 构】
：
中国地质大学(北京)工程技术学院,北京 100083;自然资源部深部地质钻探技术重点实验室,北京 100083
论文部分内容阅读
机械式自动垂直钻具具有耐高温、成本低和适用范围广等优点,其在深部资源勘探领域有广阔的应用前景,但纯机械式结构导致其纠斜精度易受外界环境的干扰.为进一步提高机械式自动垂直钻具的纠斜精度,对不同强度黏滑振动下钻具稳定平台的控制性能进行研究.首先,通过构建钻具稳定平台控制性能的数学分析模型,得到影响稳定平台控制性能的因素.然后,利用ADAMS(automatic dynamic analysis of mechanical systems,机械系统动力学自动分析)软件建立黏滑振动下钻具稳定平台的多刚体动力学仿真模型,并对不同影响因素以及振动强度下稳定平台的控制精度和控制效率进行分析.最后,综合分析得到钻具稳定平台控制性能最优时各影响因素的推荐值.分析结果表明:PDC(polycrystalline diamond compact,聚晶金刚石复合片)半径对钻具稳定平台控制精度的影响最大,而填充物密度的影响极小;轻度和中度黏滑振动对钻具稳定平台控制效率的影响不大,重度黏滑振动可大幅提高控制效率,但黏滑振动强度对控制精度几乎没有影响.研究结果可为黏滑振动下机械式自动垂直钻具的优化设计提供参考.
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