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随钻测斜仪(SST)的测量元件为磁通门传感器及重力加速度传感器。本文仅对前者的定向原理进行了粗浅的探讨,与同行者讨论。SST已在定向井中广为使用,但磁通门传感器却为人鲜知:本文从电磁感应原理推导了当施加恒定的地磁场以后,则出现二次谐波畸变,从而可产生感应电压,该电压与地磁场强度以及磁场方向与磁通门轴线的夹角余弦成正比的关系。
Measurement components while drilling Inclinometer (SST) are fluxgate sensors and gravitational acceleration sensors. This article only on the former principle of the direction of the shallow discussion, discussion with colleagues. SST has been widely used in directional wells, but the fluxgate sensor is well known: This paper deduces from the principle of electromagnetic induction when the application of a constant magnetic field, then the emergence of second harmonic distortion, which can produce induced voltage, the The voltage is proportional to the strength of the earth’s magnetic field and the direction of the magnetic field with the cosine of the included angle of the fluxgate’s axis.