How to Inspect the Desander Cone
Many of our readers might not realize that desander cones wear out, and need to be replaced. If your desander cones are not performing like they used to, and you are seeing more liquid than sand coming out of your cones, it may be time to inspect them.
Inspecting your desander cones is important and easy to accomplish. To inspect your desander cones, first remove them from the manifold. Remove the clamp that bands the top and bottom half of the cones together. The two halves will split apart. (See figure 1.1) Look inside of the bottom half towards the output nozzle. If you see grooves or wear it may be time to replace your desander cones. The top half of the cone will also show wear around the outside edges near the input jet. (See figure 2.1-2.4)
Both the top and bottom half of the cone need to be replaced if there is excessive wear. When the sand enters the cone at a proper psi, the pressure creates centrifugal force which pushes the heavier sand to the outside of the cone. This pressure forces the sand down the smooth sides of the cone. The lighter, clean mud goes back up the center of the cone and into the tank. As the sand swirls around however, it carves grooves on the inside of the top and bottom halves of the desander cone. The grooves disrupt the centrifugal flow of the sand and then will get mixed back in with the clean mud. This means your desander cones have lost their efficiency and may need to be replaced.