fluid mud cleaner is made of desilter, desander and fine mesh shaker screen, usually the mesh of
screen is bout 140-200meshes, the purpose is recovering parts fluid and barites
which through hydrocyclone.
we don’t suggest drilling fluid mud cleaner is used in not aggravate drilling
fluid. We can close shale shaker and let bottom flow of hydrocyclone are all
discharged if the mud cleaner is used in not aggravate mud cleaner. In order to
meet the requirements of dispose all drilling fluid, desander and desilter must be made of several rotational flow
cones. In order to ensure hydrocyclone can normal work, liquid inlet pressure
must be kept in 0.25-0.35MPa. Liquid inlet pressure of hydrocyclone should use
the maximum because the number of rotational flow cone is more and pipeline is
long. Liquid inlet pressure of desander should use lesser because the
rotational flow cone is less and the pipeline is short.
size of liquid inlet pressure decided to matching of desander is whether
reasonable, so the choose of centrifugal pump is
very important. Usually the head of centrifugal pump is about 40m, the
displacement is equal to the stander of desander and desilter. Meanwhile when
choose desander and desilter we must reference the maximum displacement of
drilling fluid pump.
What times to use the two
equipments didn’t be limited. When drill shallow and soft stratum and the
content of big particles drilling cuttings in drilling fluids are high, the two
equipments should be used at the same time. When drill the hard stratum, we can
directly use desilter dispose drilling fluid if use fine mesh screen