Production logging tool for measuring fluid densities

Abstract From the Canadian patent

A fluid density measuring tool is set forth a, structure having a shielded sonde supporting a radiation source having a characteristic gamma ray emission pattern preferably in all directions of azimuth, and a cooperative first detector is disclosed. Ports aligned with the first detector and source preferably limit the gamma ray pathway primarily to the fluid surrounding the tool. Additional detectors are included and, they measure gamma radiation which involves a surrounding casing and other materials about the well. This provides sufficient measurement data enabling one to sort the data and thereby determine the bulk density of the fluid in the well.