Patent ID: 9182374
Filing Date: 2015-11-10
Classification: E21B,G01N,G01V,G06F,H01Q

Abstract:
1. A pipeline marker comprising: a power source; a computer system electrically connected to the power source and comprising a processor and at least one memory device operably connected to the processor; first and second flux detection systems, each comprising a magnetic flux sensor, a first flux concentrator positioned on a first side of the magnetic flux sensor, and a second flux concentrator positioned on a second, opposite side of the magnetic flux sensor; the first flux detection system, wherein the first flux concentrator thereof is formed of magnetically permeable material shaped and positioned to receive magnetic flux at a first magnetic flux density and deliver the magnetic flux to the magnetic flux sensor corresponding thereto at a second magnetic flux density that is greater than the first magnetic flux density; the first flux detection system rotated in orientation with respect to the second flux detection system; the computer system programmed to record signal output by the magnetic flux sensor of the first flux detection system and signal output by the magnetic flux sensor of the second flux detection system; and a housing containing the power source, the computer system, and the first and second flux detection systems.