Patent ID: 7194902

Claim:
A down hole tool positionable in a well bore penetrating a subterranean formation, the down hole tool adapted to convey at least a portion of a fluid in the formation to a viscometer-densimeter via a flowline disposed between the viscometer-densimeter and the formation, the viscometer-densimeter comprising: a sensor unit positionable within the down hole tool, the sensor unit comprising: at least two spatially disposed connectors; a wire suspended in tension between the at least two connectors such that the wire is available for interaction with the fluid when the viscometer-densimeter is positioned within the down hole tool and the down hole tool is positioned within the subterranean formation and receives the fluid from the subterranean formation, the connectors and the wire constructed so as to provide a frequency oscillator; and at least one magnet emitting a magnetic field interacting with the wire.