Patent ID: 9274246
Filing Date: 2016-03-01
CPC Classification: G01V

Claim Text:
1. A downhole tool for measuring gas holdup in a borehole flowstream, the tool comprising: (a) a low energy gamma radiation source that emits gamma radiation in a range between 75 kiloelectron Volts (keV) and 150 keV; (b) a long spaced gamma ray detector adapted to detect gamma rays scattered from interactions between the emitted gamma radiation and the borehole flowstream; (c) a short spaced gamma ray detector adapted to detect gamma rays scattered from interactions between the emitted gamma radiation and the borehole flowstream; wherein (d) count rate data of the short spaced detector and the long spaced detector to gamma rays scattered from the emitted gamma radiation in a plurality of predetermined gamma radiation energy regions are combined to yield the measure of gas holdup in the borehole flowstream.