Sonic transmission research of geosteering drilling tools

In geosteering drilling technology, the transmission of information measured by near-bit sensor has always been a problem. Downhole drilling tool is a very complex medium for sonic transmission. This paper takes geosteering drilling tool as the study object, and puts forward a method of short distance transmission, which is based on sonic wave transmission theory. The experiment testing the drilling pipes sonic transmission characteristics in the laboratory is done. This paper analyzes the sensitivity of sonic wave to some parameters when it acts as carrier. These parameters include the position of the excitation signal, the frequency of the excitation signal, the amplitude of the excitation signal and the position of the response signal. The strength of the propagated sonic signal would be weakened or strengthened because of reflection wave and multipath, but the data transmission is feasible by sonic wave underground short distance.