As the demands for environment protecting
is much higher than before in everywhere of the world, only a solids control
system used for the drilling rig is not enough for treating the drilling
cuttings. In case of water based mud drilling cuttings further treatment, there
is a zero-discharge system including a so called drilling waste management
system and a dewatering unit.
In a waste management system, there is an
auger to collect drilling cuttings from the solids control system, for
collecting and transporting the cuttings discharged from the solids control
system. And another auger with is slope, for feeding the cuttings into the
waste management system, always a high-G shale shaker or a vertical cuttings
dryer. Then the treated liquid from the first treating equipment will be
further treated by a decanter centrifuge, the waste management centrifuge.
After a long while, some solids phase
particles are smaller and smaller than before, too small to be separated out by
a 2-5 microns’ centrifuge. Then comes the dewatering unit, constructed with a
flocculation unit including PAM dissolving system, dosing and electric control
for PAC, dosing pumps, some agitators, tanks and a container for installing all
of above. After the flocculation step, the fine particles become larger ones,
at least large enough for being separate out by centrifuge.
GN is cooperating with many mud companies
and mud service companies, who don’t only use the waste management systems, but
also the dewatering units for their services. Some of them are making their own
dewatering units and buying centrifuges from GN for their package. Sure in the
future GN will provide more and more centrifuge in different fields for
different applications.