Patent ID: 8538701

Claim:
A fluid conductivity tool for measuring the conductivity of a borehole fluid located in a borehole extending through a formation, the tool comprising: a signal processing circuit configured to generate an electric signal; a transmitter driver circuit connected to the signal processing circuit and configured to drive a transmitter coil to produce electromagnetic radiation; a fluid contact with access to the borehole fluid such that borehole fluid can enter the tool and electromagnetic radiation from the transmitter coil is passable through the borehole fluid in the fluid contact; a receiver coil configured to receive the electromagnetic radiation after passing through the borehole fluid in the fluid contact and converting the electromagnetic radiation into a received electric signal; a receiver electronic circuit configured to process the received electric signal; and wherein the signal processing circuit configured to receive data from the receiver electronic circuit and compare the electric signal to the received electric signal to determine the conductivity of the borehole fluid.