| 摘要 |
Method for recording the geophysical characteristics of a ground traversed by drilling, and device for implementing said method. The method is characterized in that the train of rods (32) is kept in the drilling hole (9), in that a probe (30) is permanently arranged in the head rod or mass rod adjacent to the bit (31), in that electrodes (40) directly connected to this probe are also permanently fixed on the head rod and provide one element of a coupler (38), and in that another coupler element (35), comprising electrodes (39) which correspond to those of the former coupler element, is suspended to a self carrier cable (36) and may be brought to a coupling position inside the train of rods. To effect the measurements, electric signals recorded by the probe are collected while the train of rods and the coupler are simultaneously raised up, the electric connection agent between the two coupling elements being the drilling fluid. |
