Cementing is one of oilfield service, It delivers engineered solutions to prepare the wellbore to receive cement. The main objectives of cementing are to seal the annulus (the space between the casing and the borehole) and to isolate each producing zone in the well. The cement sheath also protects the producing zone from unwanted water and gas, protects the casing from corrosion and stabilizes the wellbore. 
Except for Cementing, oilfield service also includes sand control, well completion , drilling fluids service, etc. GN solids control provide complete line of drilling fluids solids control system & equipments.