The Slurry Treatment Plants for Slurry Shield Tunnel Boring Machine

Dec. 9, 2010 - PRLog -- The Slurry Treatment Plants for Slurry Shield Tunnel Boring Machine have to conform to more and more stringent specifications :
- from the geological point of view, the diversity and instability of terrains demands an exceptionally flexible design, which in particular must enable rapid modifications of the rheological characteristics of the slurry in terms of its density and viscosity.
- from an ecological point of view, it is important to treat all the water and sludge produced. It must be entirely transformed into solid form to facilitate disposal and reduce transport cost.
These plants comprise 4 sections :
- scalping/desanding/ dessilting
- recycled mud management
- excess mud management,
- surface and drainage waters management.

http://www.gnsolidscontrol.com/drilling/slurry-separation-plant/

Our originality lies in having developed equipment and techniques specific to each of these 4 sections :
- in the scalping section, trommels are superior to vibrating screens to avoid clogging with sticky clay, while maintaining a lower dilution of these clay and therefore a better control of the quality of the sludge.
- in the desanding-desilting section, GN propose complete plants with one, two or three stages of high-performances cyclones depending on the geological type of bored soils.
GN supplies plants composed of monobloc modular units. Sands are dewatered in order to obtain a minimal residual water content.

as far as the Sludge Management Section is concerned, GN has developed and patented a monitoring system, designed to assure 4 essential functions :
• maintaining the balance of the sludge volume, i.e. compensate any losses in the ground or anywhere else,
• maintaining the balance of the solids, i.e. mainly eliminate or compensate any addition of excavated materials in order to keep the desired density of the conveying slurry,
• maintaining and adjusting the rheologic characteristics of the conveying slurry, according to the choice made by the operator thanks to the information given by the rheometer (viscosities, densities & Yield value),
• direct addition to P1 of a fresh specific mud for any particular need, for example to prepare one hyperbaric maintenance operation.

http://oilfield.gnsolidscontrol.com/tbm-slurry-treatment-...

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Solids Control Equipments & System China Manufacturer,Supply fluids Processing system, Shale Shaker, Mud cleaner, Centrifuge,Vacuum degasser,Sand pump,Gas-liquid Separator,desander,desilter,mud tanks,mud hoppers,for oilfield oil&gas well drilling rig.