Innretning tilsiktet for forseglet elektrisk forbindelse av elektroder ved skjermede kabler og system for petrofysisk målingved bruk av innretningen

摘要

- device for carrying out the connection by means of shielded cable of electrodes to a measuring device, situated on either side of a wall (18) between an enclosure under pressure of the medium outside. - the device comprises a rigid sleeve of protection (16) of insulating material which passes through the wall of a sealed manner and is extended as far as the immediate vicinity of the electrode, in which the mineral-insulated screened cable (c). Inside the rigid sleeve (16) is disposed a tube made of conducting material (23) which is in electrical contact with the shielding of the cable. A plug (24, 28) is secured to the rigid sleeve (16). It is connected to the electrode (15) and - electrically connected to the core (21) of the shielded cable to the inside of the metal tube (23) an electrical connector (20) is associated with the rigid sleeve (16) to the outside of the wall (18) for the connection of a shielded wire connected to the measuring device. This device can be used in a system for measuring the electrical resistivity of a sample in a frequency range which can reach several tens of mhz. - applications, for example, to the petrophysical measurements on rock samples porous.