Abstract: An example omnidirectional sensing system may include a fiber optic cable wrapped around a sphere or spheroid in no preferred direction. The wrapped fiber optic cable may make the system more receptive to acoustic disturbances and increase the fidelity of the sensor in the area of the sphere or spheroid. The system may be used, for instance, for vertical seismic profiling via a wireline technique, placement at the surface of the earth for surface seismic, and in marine applications.

Abstract: Methods and systems are presented in this disclosure for fluid flow metering with point sensing. A transducer (acoustic sensor) located at a point externally along a pipe (e.g., deployed in a wellbore) can transform a mechanical energy of a fluid flow in the pipe into an acoustic signal, which is then acquired and digitized to obtain a digital signal. The acquired digital signal related to the fluid flow can be processed by applying various advance signal processing techniques in order to remove sharp and/or broadband resonances due to a turbulent fluid flow to determine energy associated with the fluid flow. A rate of the fluid flow can be then estimated by mapping the determined energy to a fluid flow rate.