Adair James C, Luke Robert R: Method of placing explosive charges. Shell Oil Company, Moran Tom M, Denkler Harold L, April 16, 1974: US3804182 (13 worldwide citation)

Seismic energy for geophysical prospecting is provided by drilling a shot-hole to a selected depth using a cutting tool such as a hydraulic jet nozzle or a downhole drill motor attached to a non-rotating, continuous flexible spooled conduit; pumping a liquid explosive and detonating means actuatable ...