Drilling Mud Recycling System

Portable decanter centrifuges are ready for shipment to core drilling company in Mexico. The mini centrifuge is attached with lifting pad on the four corners, the user can lift the portable decanter centrifuge easily to their work site, especially in some places where road transportation is limited. The technical specification is as below:

Model: GNLW223D
Centrifuge bowl diameter: 9 inch (220mm)
Centrifuge bowl length: 26.4inch (670mm)
Max bowl speed : 4500rpm
Typical bowl speed : 3800rpm
Max G force: 2492G
Typical G force: 1777G
Main motor: 11KW
Gearbox ratio: 35:1
Gearbox torque: 500N.M
The bowl material is made of duplex stainless steel 2205, the screw is made of SS316L, the screw propeller is protected by tungsten carbide tiles, the solids discharge port and fluids distribution port is protected by tungsten carbide alloy. The bearing is from SKF brand for reliable operation.
If the client need bigger treating capacity of fluids and cleaner treatment water, they can select GNLW224 series, which with longer centrifuge bowl length. Both of the GNLW223 and GNLW224 series mini decanter centrifuge are widely used for diamond core drilling mud cleaning unit, the purpose is to clean the mud, recycle the water and reused for drilling. When it is required to reduce the start electric current, VFD control panel will be installed on the skid, the VFD decanter centrifuge can be used in high altitude mountain.

GN mini decanter centrifuge is the main equipment for diamond core drilling solids removal unit, which consist of shale shaker, picking up pump, decanter centrifuge, centrifugal pump / mixing pump, mixing hopper, mud tank and generator on the skid. The complete solids removal unit has been widely used for waste water treatment , we have standard compact design for convenient transportation and economic solution, also we can make customized design as per client’s requirement.

As a complete zero discharge system manufacturer in China, GN solids control can produce customized zero discharge system and major equipments, including linear motion shale shaker, mud cleaner, decanter centrifuge, vertical cuttings dryer, screw conveyor, screw pump, collection tanks, etc. The working process is as below:

The used drilling fluids flow to 2 or 3 or 4 units of solids control shale shaker, the fluids dropped into the mud tank, the drilling cuttings are separated out and collected by screw conveyor and transfer to vertical cuttings dryer ( if for oil based mud or synthetic oil based mud), to reduce the moisture and oil content, the discharge cuttings with oil content below 5%, which can be disposal directly or for land fill. If for water based mud, we will use high G drying shaker to dry the water based drilling cuttings. The recovery fluids flow to intermediate tank, which will be feed to VFD decanter centrifuge by its feeding pump ( screw pump). The fluids discharged from decanter centrifuge will be transferred back to solids control system mud tank and mix with chemicals to prepare for new drilling fluids.
The mud cleaner is a combination of desander cone, desilter cone, bottom shale shaker, with 2 units of centrifugal pumps as feeding pump of desander cone and desilter cone. The desander cone separation cut point is 45 microns, the desilter cone separation cut point is 25 microns. The fluids treated by desilter cone flow to mud tank. If required, middle speed decanter centrifuge and high speed decanter centrifuge will be installed after mud cleaner. The discharged solids from mud cleaner and decanter centrifuge will be collected and transferred to solidification unit together with the solids discharged from VFD decanter centrifuge.
If you need zero discharge system, pls contact with GN solids control.

Recently one unit of GNOST-05B Oil Sludge Treatment Package System are ready for shipment to Kazakhstan.
The system consists of 3 major modular as below:

1. 20ft container size pre-mixing modular, including 1 unit of pre-mixing and heating mud tank with standard 20ft container size, 2 unit of GNJBQ110G mud agitator, submersible slurry pump GN50YZ20-18 as feeding pump to shale shaker modular, 1 set of liquid level meter, 1 set of electric control system, 1 sets of tank accessories, heating pipelines, handrails, 2 units of lightings.
2. Coarse shaker modular to separate coarse solids from the oil sludge, to reduce the solids content and protect the further treatment equipment – decanter centrifuge. It includes oil sludge treatment shale shaker GNZS706F-DZ with spray system and sealing cover, heating tank, 2 units of mud agitator, screw pump (as decanter centrifuge feeding pump) with Static mixer, electric control system, liquid level meter, heating pipelines and tank accessories, lightings.
3. 3 phase centrifuge separation modular , including VFD decanter centrifuge, three phase separation disc centrifuge, VFD feeding pump and flushing unit, solids discharge unit for 3 phase disc centrifuge, decanter centrifuge fluids collection tank and skid, mud agitator, liquid level control system, oil buffer tank, water buffer tank, electric control system, pipelines, handrails, explosion proof lightings. The disc centrifuge flushing unit include a flushing tank, a water pump, the function as operation water and flushing water. The solids discharge unit include a solids collection box, solids discharge pump and pipeline connected to shaker tank.
   GN can design and produce standard oil sludge treatment system, GNOST-02C with 2m3/h treating capacity, GNOST-05A with 5m3/h treating capacity, GNOST-15A with 15m3/h treating capacity. Also we can produce customized oil sludge treatment system as per client’s requirement. If you need a oil sludge treatment solution, pls contact with GN solids.

As a tank cleaning unit manufacturer in China, GN produced automatic tank cleaning system mainly consist of 3 components, tank cleaning unit, buffer tank, inclined plate clarifier (IPC).

The general working process is as below:
The high pressure centrifugal pump transfer the clean water from buffer tank to tank cleaning unit to clean the mud tank. GN provide automatic flushing gun to clean the mud tank, which can be designed as skid mounted with frame for offshore drilling application. According to client’s requirement, we can design 1 unit flushing gun or 2 units of flushing gun according to client’s requirement.
The suction pump transfer the washed water from mud tank through the strainer ( to filter the coarse solids bigger than 2mm), then through the static mixer to inclined plate clarifier. In the meantime, the chemical dosing unit supply chemical to the static mixer with the washed water to improve the separation efficiency in the inclined plate clarifier.
The inclined plate clarifier separate the settled solids out and the treated water will overflow to buffer tank. The membrane pump will take out the settled solids from IPC to waste box.
The whole tank cleaning unit can be controlled by the explosion proof control panel on the skid.
After long time operation, the solids control system mud tank need to be cleaned due to the accumulated solids on the tank bottom, which will influence the mud density, to keep the drilling fluids balancing, tank cleaning unit is necessary to be applied.
Except for tank cleaning unit, GN solids control also produced oil sludge separation unit to treat oil tank bottom oil sludge for oil recovery, solids discharge and water treatment. If you need mud tank cleaning machine, tank cleaning slurry treatment unit, oil sludge treatment system, pls contact with GN sales engineer.

Recently one complete set of automatic mud tank cleaning unit are ready for shipment for offshore drilling platform to our international client. The automatic mud tank cleaning unit consist of the modular below:

1. Automatic Flushing Gun , 2 sets of automatic flushing gun are installed on one skid with lifting frame for offshore lifting application.
2. Mud Suction Unit, the peristaltic type pump sucked the sludge from tank bottom, it can be widely used to suck the sludge with either coarse solids or fine solids, weather with high content or not.
3. Mud Clarify Unit, it is also called inclined plate classifier, it is a equipment to separate the solids which can be transferred by the bottom installed screw conveyor to waste storage box. By using chemical dosing unit to add flocculants, the fine solids can be separated out easily.
4. Mud Storage and Transfer Unit, the treated water is storage in the mud storage tank, the water can be reused in the circulation system for tank cleaning by transfer pump.
5. Waste Cuttings Box, the discharged solids from mud clarify unit will be discharged into waste storage box, when it is full, it will be dumped by crane or forklift.
   Why need to use automatic mud tank cleaning unit for offshore drilling platform?
   After long time operation, fine solids will accumulate in the tank bottom, which need to be cleaned. The traditional method to clean mud tank will take 5 hours with 4 workers, it is a time and labor cost consumption cleaning method. GN automatic mud tank cleaning unit will make the cleaning much easily, reduce the labor cost and reduce the cleaning time. GN produced automatic tank cleaning unit can be widely used for drilling mud tank cleaning by using high pressure flushing nozzles. If you need more information, pls contact with GN solids sales.