Zero-Discharge System has became the trend of drilling waste management Dilled cuttings and the waste drilling water should be disposed in a safe way to avoid the harm to sensitive environment. This is crucial to oil based drilling mud. A set up of one zero-discharge system contains the following parts:

1. Linear motion shale shakers to separate the drilling cuttings of size over 200 mesh from the drilling mud. The solids off the shakers are discharged over a screw conveyor to transport them to vertical cuttings dryer.

2. Vertical cuttings dryer is used to recover the oil from the drilling cuttings. The centrifugal force inside the dryer allows the liquid portion of the feed pass through the cake bed of solids while the cake bed itself is continuously sent to the discharge at the outer diameter of the screen basket. The “dried” cuttings exit from the front of the machine where they are discharged to another screw conveyor for further handling and treatment. The recovered oil exists tangentially from the base of the unit into a holding tank.



3. Centrifugal pumps feed the desander cone and desilter cones of the mud cleaner. The overflow discharge and the screen undersize are sent to the next compartment on the mud tank system. The cuttings with size over 250 mesh discharged by the mud cleaner screen are sent to the cuttings dryer.



4. Progressive displacement pump (PDP) feeds the low-speed decanter centrifuge to recover the barite. The effluent is then fed to the high-speed decanter centrifuge to separate the colloidal particles from the drilling fluid. This fluid is mixed with the liquid from the cuttings dryer discharge.




5. The effluent from the high-speed centrifuge is mixed with the barite from the low-speed centrifuge and returned to the mud system with a centrifugal pump.

GN centrifuge provide you with efficient centrifugal separation technology both in the horizontal and vertical types of centrifuges.

Vertical cuttings dryer and decanter centrifuge as the key waste management equipment was shown on CIPPE exhibited by GN Solids Control. GNCD930 Cuttings Dryer is designed to treat the drilling cuttings off the shakers and under flows of hydro cyclones. The purpose of this dryer unit is to dry the wet drilling cuttings to a more environmental protective standards in term of harmful liquid existence in the drilled cuttings.

GNLW553 series decanter centrifuge is often selected for dealing with the effluent of drilling wastes. GN beat the other suppliers by choosing the duplex stainless grade 2205 as the bow material; the stainless steel 316L as the screw material. The screw is protected by tungsten carbide tiles. All these ensure the long service life and less down time.

PLC control and VFD cabinet is available to make it easy for operation and adjustment of technical parameters.

GNLW553 series decanter centrifuge is now leaving for Houston, USA for attending OTC 2014. This is the third time for GN to show the latest centrifuge technology to the oilfield related companies. Big volume decanter centrifuge unit is our choice to show this year.

Big bowl big volume decanter centrifuge available in PLC (Programmable Logic Control) and VFD (Variable Frequency Drive)

GNLW553 Decanter Centrifuge is big bowl big volume centrifuge for fast continuous drilling or big volume mud treatment projects. It is a trend that big volume centrifuges are welcomed to nowadays drilling contractor and drilling mud services companies. GNLW553 can be used for fine/ultra fine solids separation, barite recovery and zero-discharge dewatering.

The drilling waste management is one of the most important challenges in the oil gas drilling industry. The used drilling mud and cuttings are the main problem. The main pollution of cuttings is caused by:
●Drilling Mud ●Oil
●Biocides ●Completion or stimulation fluid components
●Corrosion inhibitors ●Reservoir Fluids
A sustainable development requires the zero discharge of wastes into environment. Decanter centrifuge and vertical cuttings dryer have proven to be an important and efficient piece of equipment to treat the drilling cuttings after solids control process.

Drilling operators have to follow the national environmental policy worldwide. Because the sustainable development becomes a basis of environmental policy it is no more possible to continue the open system of drilling waste management. Research institutions and drilling operators are looking for technology meeting the closed system requirements. There are three main points such approach:
●Amount of waste has to be minimized as much as possible
●Reusing and recycling is necessary
●Only safe and similar to the local environment material can be deposited

Reach us at GN Solids Control for your drilling waste management sulotions.