desander

    Desanders are the second phase of drilling fluids process. Includes two 12-in.(305-mm) diameter polyurethane hydroclones slant mounted over the shaker. Each desander clone includes four replaceable wear resistant polyurethane sections that are joined together with quick release stainless steel clamps. Thedesander is furnished with an 8-in.(203-mm) diameter feed manifold and a 10-in (254-mm) diameter discharge manifold and a 0-60 psi (4.1-bar) pressure gauge. The desandder also includes a solids discharge trough to distribute the hydroclone underflow evenly onto the screening surface.They are used to separate sand from drilling fluids which is mixed with drilling muds and big articles. During drilling process mud is being poured from inlet and is getting deeper. when the vortex in the hydroclone running, the water spray from a pipe and the mud ,soil,big articles subside down the outlet. That is the recycling of mud in order to separate water from mud and get clean water that will be used in next excavations.

     Desander operates on exactly the same principle as hydrocyclone. Hydrocyclone is made of an upper cylindrical section and a lower conical section. A vortex finder pipe protruding downward at the top of the upper cylindrical section that is a little bit below the tangential feed section . Fluid from centrifugal pump enters the tangential feed section of the hydrocyclone at high velocity on swirling motion creating a centrifugal force that accelerates the solids to the cone wall. The solids and liquid mixture rotates rapidly.While swirling downward the higher mass solids move toward the wall and exit the down section- cylinder through its apex while the lighter mass which are concentrated away from the wall towards the centerline are now forced to reverse direction swirling upward exiting the vortex finder.