关键词: VSP 测井仪 , 推靠机构 , 优化设计 , 安全回收

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