Sand content test

Sand content test

Another simple but important test is for sand content. It consists of a 200 mesh sieve, funnel, and glass measuring tube graduated 0-20% which can be read directly as to the percentage of sand in our drilling fluid. This sample is taken from our pits after settling or just before the pump.

Its use is to add mud in the glass tube to a point marked, then add water to the point marked and shake. This is then attached to the top of the screen which is then inserted into the glass tube. The sand is washed from the screen into the tube with clean water. The volume of sand can then be read directly on the tube.

It is important to clean and dry the fine screen. A sand content of not more than 2-3% can be tolerated but the lower the better. High volumes of sand will cause excessive wear and also cause stuck pipe. Pumping this heavier fluid requires additional horsepower and adds mud pressure to the formation.