| 摘要 |
<p>PCT No. PCT/FR90/00574 Sec. 371 Date Jan. 29, 1992 Sec. 102(e) Date Jan. 29, 1992 PCT Filed Jul. 27, 1990 PCT Pub. No. WO91/02269 PCT Pub. Date Feb. 21, 1991.The invention relates to the principle of a probe to improve the quality of imaging logs in excavations, providing especially a good coverage of the wall 2 of the excavation by the beam of sensors 4 or electrodes. The basic component is constituted by a casing 6 moulded from a material of the elastomer type and made to allow it to be unfolded in the working position for the helically implanted zones of measurements 7, and applied against the wall 2. The material of the zones 7 of measurements is selected as a function of the parameter to be measured, the immediate but non-limiting applications concerning microresistive and acoustic imaging. The helical arrangement of the sensors 4 improves the coverage of the measurements with respect to conventional probes. Moreover, by eliminating the drilling mud 3 between the sensors 4 and the formation, this probe improves, in certain cases such as acoustic imaging for example, the response thereof and the quality of the measurements.</p> |
