Patent ID: 9213121
Filing Date: 2015-12-15
Classification: E21B,G01F,G01H,G01V

Abstract:
1. A system for locating an interface between a first material and a second material, comprising: a plurality of acoustic sensing elements operatively arranged to measure a characteristic of one or more acoustic signals at a plurality of locations along a length of the plurality of acoustic sensing elements; and an instrumentation unit coupled with the plurality of acoustic sensing elements, the instrumentation unit operatively arranged to determine a difference in acoustic coupling at specific locations in the plurality of acoustic sensing elements between a first value of the characteristic measured at a first location of the plurality of locations and a second value of the characteristic measured at a second location of the plurality of locations for identifying the interface between the first material and the second material as being located between the first and second locations if the difference is greater than a preselected threshold amount.