GN is a leading manufacturer of mud solids control system and drilling waste management system. And GN is a manufacturing with a longer history for drilling solids control equipment research from China and services in USA. With the new environment protection rules comes out in more and more countries, GN drilling waste management equipment becomes more and more worldwide famous, and exported to more and more countries.

GN Thermal desorption unit and GN Drill cuttings drying system is the most popular equipment used for waste management. But many clients are wondering about their performance, they do not know how to choose the suitable type for their projects. Below is a simple introduction to tell the difference of the 2 systems.

Brief Introduction of GN Thermal desorption unit (TDU)

It is also called TDU. It utilizes thermal desorption to treat the oily conents. Normally, the materials treated by TDU, the solids control should be no less than 40%. Other wide, it cannot be spilled well in the pyrolysis furnace.

What kind of waste sludge can be treated by GN Thermal desorption unit (TDU)

In theory, all oil type solids whose vaporization point is below 420 degree centigrade could be treated with this system. The oil type solids above mentioned is oil waste and a certain amount solids, like mixture of mud and sand. The pyrolysis furnace roller in this design heat the material in spilling way, and the material is pushed forward by shoveling plates welled with a certain angle on the roller’s inner wall. If the material is only oily mud, the spilling character would be lower.

Brief Introduction of GN Drill cuttings drying system

It utilizes different separation equipment unit to remove the solids from the fluids step by step. If The fluids can be reused for drilling.

What kind of waste can be treated by GN Drill cuttings drying system

It can be used to treat the cuttings discharged from shale shaker, desander and desilter. It cannot used to remove solids control decanter centrifuge.

Difference of Thermal desorption unit VS Drill cuttings drying system

TDU can get clean water, clean oil and very dry solids with OOC≤0.05%. But the capacity is very small, 1~2 tons per hour.

Drill cuttings drying system use vertical cuttings dryer, and high speed decanter centrifuge to treat the waste material. It can reduce OOC to 3~5%. The fluids phase can be reused for drilling. It cannot get clean end products.

The routing and correct running schedule is necessary for a reliable performance of oilfield decanter centrifuge, and it can extend the lifetime of the centrifuge.

When the oilfield decanter centrifuge arrived jobsite, check every part to ensure them in good condition. Then assembly it well.

The schedule to use GN made oilfield decanter centrifuge are as following.

1) When the centrifuge arrived jobsite, firstly, remove the supporting ring under the bowl, and then remove the fasten belt. The ring and the belt is used to protect the centrifuge bearing during shipment. They are used to protect the bowl from vibrate and rotating during shipment.

Note: You should keep the supporting ring and the fasten belt well for reuse. Every time when the oilfield centrifuge moved from one side to another side. it should be protected by the ring and the belt, and locked well.

Start the centrifuge in a short time to check the rotating direction. if the rotating direction is not correct, you should stop the centrifuge soon, check and Change the phase conductors of the motors.

1). Start and run oilfield decanter centrifuge back motor in a short time to observe whether the gearbox rotates in a correct direction, and make sure there is no adnormal condition occured. Seen from the small end of the bowl, the gearbox shall rotate in counterclockwise.

2). Start and run oilfield decanter centrifuge main motor to observe whether the pulley runs in the correct direction, and make sure there is no adnormal condition occured. Seen from the small end of the bowl, the pulley shall rotate in counterclockwise.

3) If all rotating direction is correct, and the centrifuge running stably, then you can start the centrifuge feeding pump, and feed the centrifuge from small capacity. When the centrifuge is running stably, you can increase the feeding step by step.

Here is only some main point for oilfield decanter centrifuge operation. For detailed operation schedule, please refer the manufacturer’s operation manual.

GN do offers top quality high speed / big bowl decanter centrifuge for on shore and offshore drilling rigs with different sizes.

Main series of GN centrifuges:

1) 8’’ mini size decanter centrifuge GNLW223 / GNLW223-VFD, with 3800 / 4500 rpm fixed speed for option. Variable frequency speed control also available. The mini baby side centrifuge is normally used for diamond drilling with a small capacity and footprint.

2) 14’’ is the most popular size for drilling field. The latest design GNLW363CG for fixed speed and GNLW363C-VFD for variable speed frequency speed control. GN offers premium high standard and economic standard to cater for different standard market and applications. The design for the 2 standards is the same, but economic standard centrifuge utilized economic standard material to lower down the cost, and enable a better price. But even GN economic standard, it is still better than normal Chinese standard.

14’’ centrifuge is widely used in onshore and offshore drilling rigs. It can be used for barite recovery, for fine solids separation, drilling waste management. It can also be used for waste water treatment with its super high speed.

3) GN offers 2 sides of 18’’ decanter centrifuge. One is economic big bowl GNLW452 with middle speed for barite recovery or HDD, CBM drilling rigs. It is fixed speed control.

Another 18’’ decanter centrifuge is GNLW453C-VFD, it is a high speed decanter centrifuge with big bowl.

For customer like big bowl but budget is tight, it is a good choice.

4) 22’’ inch the big bowl big capacity centrifuge special design and made by GN Solids Control. It is widely used in drilling waste management field and the solids control system. Especially in European counties as in these countries, the rigs site do not like desander, desilter cone separator. Big bowl big capacity centrifuge becomes necessary in these applications.

If you have any questions regarding onshore and offshore decanter centrifuges, welcome you contact GN Group.

GN high speed decanter centrifuge is widely used in oil & gas drilling, CBM, HDD, drilling waste management, waste water treatment, oily sludge separation, clay mine, tank cleaning, as well as mining industry.

Last week, GN decanter centrifuge system was dispatch for a East Asia customer. The system will be used for mining industry. The function of the system is to reduce the water content.

The decanter centrifuge system including following:

1) 1 ea shale shaker GNZS594E.

It is 4-panel shale shaker with linear motion. The shaker screen we have steel frame and composite material for option. The shale shaker can be used to treat drill mud as solids control shale shaker. It can also be used as High G drying shaker with high G force to treat drilling cuttings. The linear motion design with Adjustable high G force make GNZS594 very popular for any types of drilling including: oil gas drilling, CBM drilling, HDD, water well, geothermal well drilling mud cleaning. The simple but heavy duty design makes GNZS594 shale shaker have reliable operation with less maintenance.

2) 2 ea decanter centrifuge GNLW363CG-VFD.

It is GN C-generation advance design decanter centrifuge. Two motors of GNLW363 centrifuge mounted on one end, parallel and at equal elevation for smallest footprint and maximum accessibility. The centrifuge Bowl material made from Duplex Stainless steel 2205 by centrifugal casting, which is better than SS304 and SS316. Stainless steel conveyor heat treatment to over 1000℃ for better strength. The opening on the conveyor does increase the capacity of the centrifuge. The centrifuge solids discharge port is protected by special ceramic inserts, it is anti-abrasive and with longer life time. Furthermore, GN equip bowl lifting bracket to protect the bearing during transportation.

3) 2 each Feeding pump for 2 each decanter centrifuge respectively

The feed pump is from German brand NETZSCH. Fluids touch material SS316L.

4) Electrical control system for all above equipments.

4) Mud tank, 1 ea, all above items mounted on the tank for turnkey solution.

For more information of GN made equipment, welcome you contact GN Group with its 7×24 hours service lines.