Memory tool for a retrievable flow meter device

A method comprising:

• receiving, by a memory tool, multi-phase measurements from one or more sensors, the multi-phase measurements corresponding to a plurality of acoustic signals received by the one or more sensors, the plurality of acoustic signals generated by a plurality of acoustic devices that includes a plurality of fluidic oscillators positioned on a circumference of a flow meter device and arranged about an axis of the flow meter device at a common radial distance for generating the plurality of acoustic signals in response to fluid flowing in a wellbore, the memory tool coupled with the one or more sensors via a dissolvable element;
• storing, by the memory tool, the multi-phase measurements fora predetermined amount of time;
• retrieving, by dissolving the dissolvable element, the memory tool from the wellbore for determining the flow characteristics of the fluid;
• and
• providing, by the memory tool and subsequent to the predetermined amount of time, the multi-phase measurements for determining flow characteristics of the fluid.

A flow meter device comprising:

• a plurality of fluidic oscillators positionable on a circumference of the flow meter device and arranged about an axis of the flow meter device at a common radial distance to generate a plurality of acoustic signals in a wellbore;
• one or more sensors positionable to detect the acoustic signals from the plurality of acoustic devices fluidic oscillators for making multi-phase measurements of fluid with respect to the wellbore;
• and
• a memory tool communicatively couplable to the one or more sensors using a dissolvable element to receive and store the multi-phase measurements for a predetermined amount of time for determining flow characteristics of the fluid, wherein the memory tool is configured for retrieval, via dissolving the dissolvable element, from the wellbore for determining the flow characteristics of the fluid.