Just recently, GN has delivered three complete sets of oil rig drilling waste management equipment for a drilling company in Nigeria. In Nigeria and other African countries, there are strict laws to regulate the drilling activities especially when taking environment protection in consideration. In Nigeria, along with each drilling rig, there should be a complete set system for waste management, including drilling cuttings waste management and drilling fluids separation.
Drilling cuttings are mainly from the shale shaker. Shale shakers take the heaviest burden in a solids control system, removing most and largest solids particles. But there is one problem that the cuttings discharged from the shale shaker are always quite wet. The cuttings must be well treated before discharge. For one thing, if the wet cuttings are discharged directly, the chemicals on cuttings will damage the environment badly. For the other, the liquid phase on cuttings is drilling fluids, which are quite expensive. Disposal of them means disposal money.
GN has an efficient solution to help solve those problems:
1. GNCD930 Vertical cuttings dryer. This is used for reducing the oil on cuttings, which means, to dry the cuttings before disposal. In this way, the OOC could reduce to below 0.5%. It is quite popular for oil based mud cuttings’ treatment。
2. GNLW363 Decanter centrifuge. After the vertical cuttings dryer, the liquid phase still contains lots of fine particles, and not clean enough to be return to the drilling system. In this case the high speed decanter centrifuge is used to remove the fine particles from the liquid phase discharged from vertical cuttings dryer.
3. Telescopic skids for both decanter centrifuges and vertical cuttings dryer to allow the liquid phase to fall directly to their containers
4. Feeding and conveying equipment for the GNCD930 vertical cuttings dryers and GNLW363 decanter centrifuges. In a complete waste management system, there are screw conveyors for feeding the vertical cuttings dryer and screw pumps for feeding decanter centrifuge.
In this single PO, there are 6 sets of high speed centrifuges, 3 sets vertical cuttings dryers, 15 screw conveyors and 6 screw pumps included.