Recently, GN finished the fabrication of one set oil based drilling cuttings treatment system for CNPC project. Before, CNPC has ever purchased several units drilling cuttings treatment system from GN Solids Control.

The drilling cuttings treatment system is used to treat the drilling cuttings discharged from primary solids control equipment like shale shaker, mud cleaner and barite recovery decanter centrifuge. For environment protection and cost saving consideration, the drilling operators is using the cuttings treatment system to recover more drilling fluids from cuttings, in the meanwhile, less waste will be discharged into the nature. To increase the working efficiency, GN released the vacuum pump unit that performs well to transfer cuttings sludge to treatment system.

This oil based cuttings treatment system is a compact design with all relevant equipment mounted on one skid for easy position on drill site. The equipment lists as below:
1.Cuttings Dryer unit – this is the main equipment used to remove the large size cuttings and recover oil base drilling fluids. After treated by this unit, the OOC will be going down to less 5%. It is the most important equipment in this cuttings treatment system.
2. High Speed Decanter Centrifuge – the decanter centrifuge is used to polish the effluence liquid coming from the dryer unit by remove the fine solid particles. With a speed up to 3200rpm, the centrifuge will remove the solids bigger than 5 microns to make the drilling fluids more acceptable for reusing.
3. The skid of the system is designed to with a buffer tank that is divided into 2 compartments. First compartment is used for collecting the drilling fluid from the dryer unit, and the second compartment is to store the polished drilling fluids after treated by centrifuge. GN is using the Netzsch screw pump to transfer the fluids from first tank compartment to the centrifuge unit.

GN has rich experience in designing and manufacturing the drilling cutting treatment system and solids control system. Besides this skid mounted system, GN is also able to provide the modularized cutting treatment equipment.

Last week, GN shipped out one set high standard solids control system to Australia for a client from oil gas industry. Though the Australia standard is considered to be the strictest one in industry, GN was confident that the solids control system could be fabricated as per the standard and achieve client requirement.

Actually, GN ever shipped one sethelicopter lifting mud tank system to Australia client last year. That system was also high standard request on weight and tank design.

Below few request from Client to show Australia high standard

1. All electrical material needs to be Australia standard like the wire cable color which is considered to consistence concern when client’s engineer does the cable wiring job. This will not confuse the client so as to make the job easy. In oil gas industry, all electrical material like motors, control panels, even cable glands need to be explosion proof. For Australia, client request it should be IECEX standard, and GN is able to provide that.
2. In designing the tank system, client also provided many suggestions and notices to GN engineer to ensure the design is comply with the safety standard. These comments almost covered all aspects of the tank design from walkway, handrail, lifting pad, valves and even the distance between adjacent components. All these designs have specified request and need to be approved.
3. The tank top surface is fixed with high strength glass fiber reinforced plastics for long time working time and better resistance to impaction and UV. They also have very high standard in welding and painting.

The client is using this solids control system for a work over rig drilling project. The system is consisting of 2 tanks. The first tank would be used to fix 2 unit shale shakers for drilling mud cleaning, and second tank is used for adding mud chemicals as equipped with mixing pump and mud hopper. Both tanks have mud agitators and mud guns for mud mixing. For more information, welcome call to GN.

This month, GN arranged the shipment of two sets large bowl decanter centrifuge to Australia for coal mining slurry dewatering process.
The model of the large bowl decanter centrifuge is GNLW764 that is the largest centrifuge GN can make at this time. For the coal slurry dewatering project, always a large flow capacity is required. That is why the client selected GN largest decanter centrifuge.

Features of GN Large Bowl Decanter Centrifuge GNLW764A

1. The rotating bowl is made from duplex stainless steel 2304 with centrifugal casting processing for better balance performance.
2. Screw conveyor is also rom stainless steel and the blade is protected with tungsten carbide for long working life.

3. To protect the motor of the large bowl decanter centrifuge. GN equips the VFD control panel for the operation of the centrifuge. So that the motor can be started to run at a low speed to prevent the over high electric current to burn the motor. In the meanwhile, a VFD control panel will let the operator to run the decanter centrifuge with different speed for various process purposes.
4. The lubrication system is using oil pump to feed lubricants to both of the bearing seats. The plate type heating exchanging system can effectively cool down the lubrication oil so that to get a better cooling performance and the temperature sensor installed on the bearing seat will send signal to the PLC to trip off the centrifuge in case of over high temperature.

GN decanter centrifuge is mostly used in drilling mud solids control. However, now is applied in more and more other industries like mining slurry dewatering, waste water treatment and oily sludge treatment. For more information on GN big bowl decanter centrifuge, please contact us freely.

Last week, GN finished the manufacturing of several units poorboy degassers and shale shakers that ordered by an Egypt client. Now the order has been packed well and waiting for delivery.
Manufactured per API and ISO standard, GN pooboy degasser could be used in underbalanced condition drilling to prevent a dramatic pressure surges. For safety consideration, the poorboy degasser is seen as indispensable equipment on oil gas drilling site, especially for deep drilling rig. The poorboy degasser is also named as mud gas separator.

The poor boy degasser is always installed beside the mud system. In normal condition, the drilling mud coming out of the well will flow directly to the shale shaker unit for cuttings removing. In case gas layer was intruded by drilling tools, a blowout might happen. This is the time the poor boy degasser will be applied to relieve the high pressure of the gas- invade drilling fluids and separate the gas that might be flammable or hazardous.

GN’s mud gas separator has a simple structure with fluid inlet at upper part of the vessel. Inside the vessel, several baffle plates are welded on the inner wall of the vessel. The drilling fluids coming from the inlet will impact on the baffle plates so as to release the gas in the fluids.

Gas accumulates and then is vented out from outlet on top of the vessel. The treated mud will fall down and accumulate at the lower part of the vessel, and then discharged out to the shale shaker unit. At bottom of the vessel, there is a drain valve for cleaning of the poorboy degasser.

GN shale shaker has below features to provide excellent performance to client
1. Simple structure with strong vibration deck for easy operation
2. Composite frame screen for long working time and convenient replacement
3. Patented embedded sealing technology to prevent fluids leakage
4. Stainless steel screen support frame for better anti-corrosion performance

To get more information on GN solids control equipment, please go to GN website or make a call for assistance.

Hebei GN Solid Control Co., Ltd. is located in Chaobai River Industrial Zone in the east of Beijing. It focuses on the research and development of mud separation equipment, mud recovery system, waste slurry treatment system, sludge treatment system and diversified mud transportation equipment. “GN Solid Control” has developed into a leading brand in the industry through unremitting efforts. The products manufactured are sold in more than 70 countries and regions around the world. GN Solid Control established a branch in Houston, USA in 2013: GN Solids America, the first Chinese manufacturer of mud solid-control equipment in the United States. In addition, GN Solid Control has established cooperative branches in Russia, Australia, the Middle East and Latin America. Our international brand: GN Solids Control is a well-known brand in the industry, and its products and services are highly praised by domestic and foreign customers.


The mud recovery system produced by GN Solid Control is currently the largest manufacturer and largest exporter of mud recovery systems in China. Its products have obtained the long-term cooperation strategy agreement of the country’s largest non-excavation construction unit in the non-excavation industry.


First, GN solid control G series products are divided into the following seven standard models:

  1. GNMS-200G processing capacity is 200GPM, 50m3/h


  1. GNMS-350G processing capacity is 350GPM, 80m3/h


  1. GNMS-500B/G/GL processing capacity is 500GPM, 120m3/h


4, GNMS-1000G processing capacity is 1000GPM, 240m3 / h


5, GNMS-2000GL processing capacity 2000GPM, 480m3 / h


Second, the main application areas of GN solid control G series mud recovery system:

  1. Non-excavation horizontal directional crossing/HDD


  1. Coalbed methane drilling


  1. Large, medium and small shield engineering


4, water wells, geothermal wells


  1. Mining drilling engineering, etc.

According to different projects, GN’s engineering team will design a corresponding solution to achieve the best processing results.

More question,welcome contact GN solids control