Abstract: A device is described for a plug (12) for pressure testing of bore holes and the like in a formation or the like, and associated pipe (10) in which the plug is installed in a plug-carrying chamber (14), and the plug (12) seals the passage through the pipe by cooperating with sealing bodies (23, 25), with the underside of the plug (12) being arranged (rests) in a seat at the bottom of the chamber. The plug is characterised in that it comprises a number of layer-formed or tier-formed ring disc elements of a given thickness, on fitted on top of the other.

Abstract: Ultrasound imaging pack composed of a hardware part for ultrasound imaging preprocessing and of a software part intended to be installed on a microcomputer, the hardware part including at least one ultrasound probe connected to a module of electronic circuits at least part of which is configurable, this module comprising analog FEC circuits, an assembly of analog/digital converters, an array of logic electronic gates and a high throughput link between this module and the microcomputer, the software part being stored on a removable medium.