Marsh Funnel

Marsh Funnel

First we have a Marsh Funnel and measuring cup, with a built-in screen to remove foreign material, which will give us the viscosity of our fluid. It is measured by placing 1500 cubic cm. of our fluid as it is being displaced from the well bore and placing it into the funnel. Our finger is over the end of the funnel and when removed one quart is allowed to flow into the measuring cup. Time required to flow one quart of fluid would be 25 to 30 seconds.