Patent ID: 8330465
Filing Date: 2012-12-11
Classification: G01V

Abstract:
1. A measuring head for use in electrical measurements conducted in holes drilled in the ground, the measuring head comprising an elongated body, adaptable into a hole, for being placed apart from a wall of the hole, the elongated body comprises an electrode, for electrically connecting the measuring head with surroundings of the electrode, for transmitting an electrical signal between the measuring head and the surroundings, wherein the measuring head comprises insulating means placed on the elongated body on both sides of the electrode along a length of the elongated body in order to form a measuring area, electrically insulated from other parts of the hole, around the electrode placed in the hole, wherein the insulating means are flexible and elastic, plate-like insulating sheets arranged around the elongated body and having a free diameter which is at least equal to that of the hole.