The cross-well elastic wave CT complete detection device is mainly divided into two parts: transmitting and receiving The transmitting source is a high-power electric spark source, and the receiving part is composed of a multi-channel engineering CT detector, a string detector, and a downhole cable The system adopts fiber optic technology, precise triggering, good consistency and high excitation energy It is widely used in the field of internal defect quality problem detection, rock mass cavern, loose circle and broken belt detection The electric spark logging source series has the characteristics of small single piece, high integration, simple operation, large launching energy, safe and reliable, and precise triggering It provides an ideal source for sonic logging and seismic logging This product patent number 201320802305 5 Patent name: an inter-well spark source launch probe