Main electrode probe based on soft focus array side direction

Abstract

The invention relates to a main electrode probe based on a soft focus array side direction. The main electrode probe comprises a metal mandrel, an upper connector, a lower connector, an upper pressure bearing connector and a lower pressure bearing connector. The two ends of the metal mandrel are fixedly connected with the upper connector and the lower connector through pins. A front amplifying module is arranged on the outer circle surface of the front end of the metal mandrel. The outer circle surface of the metal mandrel is sleeved with a mandrel insulating sleeve. A contact spring is fixed to a fixing groove of the mandrel insulating sleeve. Two wire passing grooves are provided with a transmitting wire bundle and a receiving wire bundle. One end of the transmitting wire bundle and one end of the receiving wire bundle are connected with the contact spring in a soldering manner, and the other end of the transmitting wire bundle and the other end of the receiving wire bundle are connected with the upper pressure bearing connector and the lower pressure bearing connector in a soldering manner. A plurality of electrodes and a plurality of isolating sleeves are alternately connected at intervals and are sequentially arranged into the mandrel insulating sleeve, and the electrodes are in pressing contact with the contact spring on the mandrel insulating sleeve. By means of the main electrode probe based on the soft focus array side direction, a plurality of resistivity change curves from a formation invasion zone to an undisturbed formation can be obtained under high temperature and high pressure.

Description

technical field [0001] The invention belongs to the technical field of resistivity logging instruments in petroleum exploration wells, and in particular relates to a soft-focus array lateral-based main electrode probe suitable for arrayed lateral instruments. Background technique [0002] At present, domestic laterologging tools generally use a mandrel integrated with metal and glass fiber reinforced plastics and glass fiber reinforced plastic isolated electrodes with sealed end faces to form the distribution of electrode systems, or use integral adhesive bonding to form electrode system distribution. The process required in the production process is complicated, and the disassembly and assembly are difficult, which is not conducive to the maintenance of the instrument. In the software focused array laterologging tool, the main electrode probe electrode leads out more cores (including preamplifier input and output lines), and the preamplifier module is required to be placed ...

AI Technical Summary

Problems solved by technology

The existing structural form is difficult to meet the above requirements. According to the requirements and characteristics of the instrument, a new structure of the main electrode probe is redesigned.

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