Abstract: New type VSP logging tool uses hydraulic and mechanical complex st ructure. It can avoid the failure of breaking eccentering machinery arms which caused by seizure of driving screw , and can withdraw the logging tool safely. Based on
ADAMS sof tware a mathematics model was established by choosing sensitive unit s size as varieties to do the analysis of dynamicsimulation, and also used penalty function to optimize the system. The simulation model also took eccentering machinery arms and support arms into consideration to adopt different well’s diameter, the range of testing well could be f rom 100 to 420 mm.
Af ter the experimental stage, this system can work steadily 2 000 times without stop under the condition of 180 ℃, water, drilling mud, oil and other kinds of erosive fluid, and the t ravel length can reach 10 000 m, the reliability arrives above 98 %. The using of virtual prototyping shorts the design periodicity, and the theoretical data is relative to the actual data which is obtained through experiment f rom physical prototype. New type VSP logging tool eccentering machinery is improved f rom the older one, and can avoid the t rouble of disassembly and save the cost a great deal.

Key words: VSP logging tool , Eccentering machinery , Optimization design , Safe withdraw

摘要： 新型VSP 推靠机构采用机液复合式结构形式，避免了因机械装置卡死而造成的推靠臂折断等弊端，保证了仪器的安全回收。运用ADAMS 软件对推靠机构进行动力学仿真分析，并选择较为敏感的部件尺寸作为设计变量建立数学模型，用惩罚函数算法对其进行优化设计。仿真模型还针对不同井径对推靠臂、支撑臂尺寸进行调整，可测井径100～420 mm。经试验验证，在180 ℃高温，水、泥浆及油液等腐蚀性液体的模拟工况环境下保证连续工作2 000 次无故障，可靠度达98 %以上。虚拟样机技术的应用缩短了产品的设计周期，理论分析的数据与经实际测量的物理样机数据较为接近。并且新型VSP 推靠机构在原推靠器的基础上进行了改良，可极大程度上减少推靠臂拆装带来的不便，节省大量成本。

关键词: VSP 测井仪 , 推靠机构 , 优化设计 , 安全回收