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钻井施工中，为了控制井身质量所使用的井下测量仪，常因意外事故落入井中。测斜防掉器就是基于防止测斜仪落井这一要求而研制的。本文介绍了测斜防掉器的结构原理和现场应用情况。
Drilling construction, in order to control the quality of the borehole downhole measuring instrument, often due to accidental fall into the well. Pedestal deflector is based on the need to prevent inclinometer fall into this requirement and developed. This article describes the principle and field application of the inclinometer.