Electromagnetic viscosity sensor

摘要

An apparatus for estimating a property of a downhole fluid includes: a flexural mechanical resonator having at least one magnetic permeable element traversing a pressureretaining wall with a portion of the magnetic permeable element protruding into the fluid, the portion of the magnetic permeable element protruding into the fluid being configured to oscillate; and a monitor for receiving a response of the flexural mechanical resonator to estimate the property.