DEVICE FOR ELECTRICAL LOGGING Russian patent published in 2008 - IPC G01V3/20 

FIELD: invention refers to mine geophysics and may be used at electrical logging primarily in devices with focusing of the current.

SUBSTANCE: device has an insulated metallic cylindrical body covered with electro-insulating material. On the body there are the main electrodes and additional insulated metallic bodies being continuation of the main body and fulfill functions of additional electrodes. The coupling of the main and the additional bodies is made with the aid of a screwed joint, whose carving is covered with electro-insulating material. In the but-end of each screwed joint there is installed a thrust ring out of insulating material of high durability. In the body under each of the main electrodes there are radial openings. In each main electrode there is an opening with carving into which corks with sealing rings are screwed.

EFFECT: device is insensitive to the quality of insulating materials, increased noise immunity.

4 cl, 4 dwg