Abstract: The structure of a simple，economical and reliable MWD system for turbadrill rbtating speed is introduced.The downhole rotating speed signal generator is a part of the turbine, no other downhole instrument is needed，The interference of the hydraulic channel caused by the triplex mud pump is analyzed and a method for processing the signal received on the surface with adaptive hatch filter and spectrum analysis is suggested.Three spectrum plots obtained from the test at a testing well of l,000 m in Zhongyuan Oil Field in 1989 are shown，It is feasible to make an economical and reliable MWD turbadrill tachometer to measure the downhole turbadrill rotating speed at a depth of mare than 3,000 m.

摘要： 本文介绍了一种简单、经济、可靠的涡轮钻转速随钻测量(MWD)系统,所用井下转速信号信息发生器是涡轮整体的一部分,不需要另加任何井下仪器,转速信号利用泥浆信道传递。本文对三缸泥浆泵工作在泥浆通道中所引起的干扰作了分析,提出了用自适应滤波与谱分析法对地面接受到的信号进行处理的方法,给出了在中原油田实验井1000M井深范围进行试验时实录的三组频谱图。利用本文所述的系统制造一种经济、可靠的涡轮钻转速计用于在地面测量3000m以上井深的涡轮钻转速是完全现实的。

关键词: 涡轮钻, 随钻测量, 转速测量, 频谱分析, 自适应陷波器