Patent ID: 9321222
Filing Date: 2016-04-26
CPC Classification: B29C,B29K,B29L,E21B,G01H,G01V

Claim Text:
1. An apparatus for estimating at least one parameter in a downhole environment comprising: an optical fiber configured to be disposed in a borehole, the optical fiber having a property that causes intrinsic backscattering of signals transmitted therein, the property varying along a length of the optical fiber to generate a variable intensity of the backscattering, the intensity of backscattering increasing along a length of the optical fiber as a function of distance from an end of the optical fiber, a value of the intensity increasing with increasing distance from the end of the optical fiber; a light source configured to send an optical signal into the optical fiber; and a detector configured to receive a return signal including backscattered signals.