Author: gnadmin

Recently one set of big bowl decanter centrifuge package is ready for delivery to international mining tailings dewatering project. The big bowl decanter centrifuge model is GNLW764A-VFD, which has been widely used for mining tailings dewatering project in the past. The system including 2 containers, the top container with big bowl decanter centrifuge, the bottom container with chemical dosing unit, both of the containers with windows and doors, for convenient transportation and operation.

GNLW764A-VFD decanter centrifuge technical parameter is as below:
Bowl diameter is 30inch (760mm), bowl length is 3328mm, the max capacity is 120m3/h, the treating capacity for oil sludge , mining tailings and other materials will be various as per different conditions. max bowl speed is 2650rpm, max G force is 3000G, the mechanical separation cut point is 2~ 5 microns, differential speed is 5~ 28 rpm, and gearbox torch is up to 25000 N.M., gearbox ratio is 38:1, the main motor is 160KW (217HP)，back drive motor is 90KW (120HP). The bowl main components including big end, small end, are made of duplex stainless steel 2304, the collection box is also made of SS304, the screw is made of stainless steel, and the bearing is from SKF for reliable working. By working with chemical additives, the centrifuge can separate ultra fine solids from the mining tailings, to get more clear water and drier solids. VFD control panel for main motor, back drive motor and feeding pump motor can adjust the motor frequency and control the feeding rate and get required treatment result.

The coal dewatering centrifuge can be utilized for coarse coal, fine coal, ultra fine coal, coal tailings dewatering treatment. Compared with filter press, the dewatering centrifuge is with small footprint, easy operation and maintenance, less cost, less maintenance cost. For more information, pls contact with GN solids.

Recently Several packages of vertical cuttings dryer system are ready for shipment to our international clients. One unit of GNCM-40A drilling cuttings treatment system is shipped to Brazil, 2 units of containerized vertical cuttings dryer system is shipped to Russia. The photo is as below:
The technical configuration of GNCM-40A drilling cuttings treatment system is as below:

1) One set of GNCD930 vertical cuttings dryer with flushing pump, its rotation speed is up to 900rpm reach 420G force, we have 0.25mm, 0.35mm and 0.5mm screen basket opening for option.
2) One set of GNLW363D-VFD decanter centrifuge with feeding pump, the max speed is up to 3900rpm, typical speed is 3200rpm, max G force is up to 3063G, it can be used to separate fine solids from the drilling fluids discharged from vertical cuttings dryer.
3) 2 sets of screw conveyor to transfer the drilling cuttings from drilling mud solids control shale shaker to vertical cuttings dryer feeding port, and transfer the separated solids from discharge port to waste container. We provide customized supporting skid for the screw conveyor for our client to install them easily at rig site.
4) Telescopic skid of vertical cuttings dryer and telescopic skid of decanter centrifuge and fluids collection tank are all on the compact skid for convenient transportation and installation.
The technical configuration of containerized drilling waste management system is as below:

One set of vertical cuttings dryer with flushing pump and one set of decanter centrifuge with feeding pump, both of them are installed inside the container to keep the operation warm in Winter, so the drilling fluids will not be frozen in cold weather.
Both of the drilling waste management system are widely used for oil based drilling cuttings treatment or SOBM treatment, if you need solution for drilling waste management, pls contact with GN solids engineer.

1 set of vertical cuttings dryer, 2 sets of fixed speed decanter centrifuge, 2 sets of VFD decanter centrifuge, 10 sets of screw pump as feeding pump and flushing pump, 4 sets of screw conveyor with some spare parts are shipped to our Africa drilling company client. This is repeat order from our clients who ever cooperated with GN solids control for many years, and he is satisfied with the quality and service.

The vertical cuttings dryer, decanter centrifuge, screw pump, screw conveyor is the most popular solids control equipments sold to Africa market, as a solution of drilling waste treatment for our clients. We had updated our equipments and system design according to client’s feedback during the past years. The decanter centrifuge lastest version is “D” version, the vertical cuttings dryer lastest version is “G” version, compared with the original “A” version design, the updated model with less problem, more efficiency, lower maintenance cost, easy operation and reliable working.
The vertical cuttings dryer model is GNCD930G, with customized control panel which is installed besides the VCD with connection cables, The verti-G dryer is with fixed speed 900rpm and generates up to 420G , we have 0.25mm, 0.35mm and 0.5mm screen basket for option based on different material. Sometimes the drilling waste is collected from primary shale shaker, sometimes it also comes from desander cone and desilter cone separation, so we need to select the proper screen size accordingly.

The VFD decanter centrifuge and fixed high speed decanter centrifuge is applied as client’s requirement, the VFD decanter centrifuge can be utilized for more applications, but the price is higher and the operation is more complicated. The fixed speed centrifuge with different size pulley belt set for replacement, with easier operation and lower purchasing cost.
If you need decanter centrifuge and vertical cuttings dryer, pls contact with GN solids control.

Recently one set of GNZS595J triple shale shaker equipped with ViST electric vacuum unit are ready for shipment to China drilling company. Each single shaker installed 5pcs of 585x1165mm composite material frame shaker screen which is compliant with API RP13C standard.

The GNZS595J-SHBJ linear motion shale shaker with drilling fluids flow rate approx. 140m3/h ( 616gpm), the flow rate is for reference only, it will be different based on different API No. of shaker screens. it is drived by 2ea of 1.72KW vibration motor, the max vibration G force is up to 7.5G, the shaker screen is 5pcs of 585x1165mm, total screen area is 3.4m2, the deck angle adjustable range is -1° ~ +5°, the feeding method is back feeding box by receiving drilling fluids from drilling rig to its possum belly then flow to shaker buffer box. We have CNEX, IEC EX, ATEX for option based on client’s requirement.

The ViST vacuum screen technology is utilized to work with shale shaker to reduce drilling waste and recycle more useful drilling fluids, it can be widely used for OBM, SOBM, WBM and for both onshore and offshore applications. A good ViST vacuum screen can reduce waste by 30~50% effectively, for less cost of drilling waste transportation, storage and waste treatment.
The catch pan is installed under the last screen panel by connecting with the vacuum unit, it could be 100% air operated or electric for your option. One ViST vacuum unit can be connected to 2~3 shakers with only one air supply to the ViST vacuum unit. Each electric vacuum unit is for one unit shaker only.
The 3 units of single shale shaker are installed on one triple shaker skid for convenient movement and installation, one set of possum belly is designed for these three units of shale shaker.

One unit of Diamond core drilling solids removal unit are ready to delivery to South Africa. This is our standard GNSR-130L solids removal unit with customized design for client’s special requirement. The system capacity is 130L/min, the separation cut point is 2~5 microns.

The technical configuration is as below:
1) One unit of GNZS752 two panel shale shaker to separate coarse solids and reduce solids content
2) One unit of GNLW224F-VFD decanter centrifuge to separate fine solids from the water
3) One unit of mixing hopper with mixing pump to prepare for new drilling fluids
4) The centrifugal pump can be also used as centrifuge feeding pump by switch the button of the control panel
5) 2 unit of mud gun as mud mixing to avoid the solids sediment
6) The tank volume is up to 6m3
7) Compact design to be installed on top of the trailer for convenient operation and movement
8) It can be lifted freely by lifting pad when used in the mountain

According to the client’s requirement, we may remove shale shaker when solids content is very low and no coarse solids in the mud, only use a decanter centrifuge to clean the waste water, which can be reused for drilling , reduce water consumption and reduce drilling cost, and protect the drilling machine to expend its working life.
The decanter centrifuge bowl and screw is made of duplex stainless steel 2304, the other components is made of stainless steel 316L, the screw blade is protected by tungsten carbide tiles which is replaceable once repaired. The bearing is SKF brand for reliable operation, max speed is up to 5000rpm, and typical speed is 0~4500rpm, the max capacity is 130L/min. The centrifuge bowl and screw is drived by main motor 11KW and back drive motor 5.5KW.