solids control

The largest size of Liquid Mud Plant that GN Solids Control has constructed is 35,500 bbls. It is composed of NO. 75 mud tanks. GN Solids Control built  a small liquid mud plant for the client first. They are happy with the performance.

Later on, this year, the client order another big size liquid mud plant with totally 35,500 BBL storage capacity. The 35,500 BBL liquid mud plant include the solids control tank, mixing tank, Brine storage tank, WBM storage tank and OBM storage tank.

The solids control tank and mixing tanks are horizontal tank. The tank size is the same with 40ft container. The lifting is utilizing standard container lifting corners. All storage tanks are vertical type to minimize the footprint.

The solids control tank includes solids control equipment shale shaker and a dual decanter centrifuge package.
The shale shaker model is GNZS594F. It is GN latest design shaker model. It is a 4-panel single deck shale shaker. The shaker screens are complied with API RP13C standard and made from composite material frame.

The dual centrifuge package includes No. 2 high speed decanter centrifuge, the centrifuge model is GNLW363C. It is 14inch bowl size decanter centrifuge with fixed speed control. Clients can choose different sizes of pulley and belt to get another fixed speed. Besides fixed decanted centrifuge, GN Solids Control can offer VFD control and FHD control for GNLW363C centrifuge.

There are 2 mixing tank in the big liquid mud plant. Each mixing tank is composed of No. 2 shearing and mixing hopper, No. 2 mixing pump and No. 2 mud agitators.

Unlike other systems, submersible slurry pump is widely used in the liquid mud plant. Normally GN Solids Control use screw pump to feed for decanter centrifuge. But in this liquid mud plant, the client requests to use submersible slurry pump to feed for the dual centrifuge package.

The client does not use centrifugal pumps for mud mixing but they request submersible slurry pump as well.
Centrifugal pumps are used as transfer pump in the liquid mud plant.

A package of solids control equipment is ready for shipment. They are made for a waste management project for a Canada client. A shale shaker, a 1000GPM 3-1 mud cleaner and a high speed decanter centrifuge. They are basic separation equipment for oil and gas drilling mud treatment system.

Shale shaker model is GNZS594. It is a 4-panel linear motion shale shaker with compositeframe pretension screens. There are 2 vibration motors are equipment for the shale shaker. The motor brand are international top brand Italy OLI or US Martin Brand. The EX control panel are made by GN Solids Control with with SIEMENS or Schneider Component. The screens are fixed with wedges and with Gear unit for fast screen change and longer screen life. The Mechanical Deck angle adjustable system is GN patent design. It can adjust shaker deck while the shale shaker is working. And the user only need to adjust shaker deck at one side, both shaker deck angle will be changed levelly.

 

Mud cleaner is a desander & desilter & Shale Shaker 3 in 1 unit for compact footprint combo type shale shaker separator. Its capacity is 1000GPM. The combo type shale shaker is equipment with no. 2 × 10inch desander cone and no. 12 × 10 inch desilter cone. The hydro cyclones are made by Polyurethane Material for long life time. And the hydro cyclone assembly is removable for adjusting to be a shale shaker. The under flow shale shaker model is the same with first stage solids control shale shaker GNZS594.

 

The high speed decanter centrifuge is 14inch bowl size. The separation speed can up to 3200rpm. GN Solids Control can offer fixed speed control, VFD control and FHD control for the 14inch decanter centrifuge. It is located on a telescopic skid. The skid can fall down to less than 2.5m for international container shipment. And it can lift to 2.8m ~ 4.2m per clients request during working.

Mud cleaner is the most popular separation equipment in oil rig drilling mud solids control system. Drilling mud cleaner is used after solids control shale shaker. It includes desander mud cleaner, desilter mud cleaner, and combo type 3-in-1 mud cleaner. 3-in-1 mud cleaner is also widely known as combo type shale shaker. GN Solids Control makes various models of combo type shale shaker.

A package of drilling mud desander cleaner and desilter cleaner are ready for dispatching to a oilfield service company in China. The desander mud cleaner and desilter mud cleaner for this project is combined with 2-panel small size shale shaker.
The desander mud cleaner model is GNZJ752F-3S. It is includes a 2-panel under flow shale shaker, and No. 3 × 10 inch desander cones.

The desilter mud cleaner model is GNZJ752F-12NF. It is includes a 2-panel under flow shale shaker, and No. 12 × 4 inch desilter cones.

API RP13 confirmed shaker screens are used for the mud cleaners.

Besides the 2 models desander mud cleaner and desilter mud cleaner. GN Solids Control makes other models mud cleaner. Below are the major types of mud cleaner GN Solids Control can make:

1) Desilter mud cleaner and desilter mud cleaner without downstream drying shale shaker. It is the most economic mud cleaner. Its design is compact and price is low. Typical model is GNWS-2SF / GNWS-3SF and GNWS-12N / GNWS-16N for 1000GPM or 1500GPM handling capacity.

2) Desilter mud cleaner and desilter mud cleaner with GNZS752 Series Mini Shale Shaker Screen. There is a small size shale shaker under the hydro cyclone separator. Typical model is GNZJ752F-1S / GNZJ752F-2S and GNZJ752F-8NF / GNZJ752F-12NF

3) Desilter mud cleaner and desilter mud cleaner with GNZS703 Series 3 Panel Shale Shaker Screen. It is combo type shale shaker.  Typical model is GNZJ703F-S2SF / GNZJ703F-S3SF and GNZJ703F-D8NF / GNZJ703F-D12NF / GNZJ703F16NF.

4) Desilter mud cleaner and desilter mud cleaner with GNZS594 Series 4 Panel Shale Shaker Screen. It is combo type shale shaker.  Typical model is GNZJ594F-S2SF / GNZJ594F-S3SF and GNZJ594F-D8NF / GNZJ594F-D12NF / GNZJ594F16NF.

GN Solids Control is a professional manufacturer to make different sizes Solids Removal Variable Speed Centrifuge includes stand, feed pump and connecting hoses, and other processing equipment and accessory processing equipment before and after decanter centrifuge.

GN Solids Control makes Variable speed from 0 up to 4,000 RPM per different models. GN Solids Control is capacity to make both VFD control decanter centrifuge and full hydraulic drive (FHD) decanter centrifuge per meet clients’ request.
GN Solids Control brand decanter centrifuge is designed with high G-force to get a better separation performance.

GN Solids Control has big bowl decanter centrifuge vary from 18 inch to 22 inch, and max. to 30 inch for big fluid processing rate. In the world, few companies have the capability to make big bowl decanter centrifuge up to 30 inch. GN Solids Control is one of them who have the abilities.
GNLW553 VFD decanter centrifuge is a 22 inch bowl decanter.
GNLW453 VFD decanter centrifuge is a 18 inch decanter.
GNLW363 VFD decanter centrifuge is a 14 inch decanter.
Roughly, for the same conditions, 1 set 22inch decanter = 2 x 14 inch decanter centrifuge.

And 1 set 18 inch decanter = 1.4 x 14 inch decanter. The operators cannot expect to use an 18 inch decanter centrifuge to replace 2 x 14 inch decanter or to replace a 22 inch decanter.

GN Solids Control 14 inch, 18 inch and 22 inch decanter centrifuge can all be used for heavy mud solids control. And also some clients want to use the decanter centrifuge for different applications like for barite recovery, HGS (high gravity solids), LGS (low gravity solids), waste management, and dewatering treatment, or other different applications, the centrifuge features are not all the same. When GN Solids Control makes the design for standard models, GN Solids Control need to balance the performance for all the situations. If clients have fixed applications with the centrifuge, suggest clients to share the information to GN Solids Control sales engineer before order to get and best solution to suit for the projects and maximized the separation performance.

 

GNLW363 FHD centrifuge is a Full Hydraulic Drive decanter centrifuge. It is designed to remove low specific gravity solids from slurries. After the FHD centrifuge separation, the solids are removed and the liquid is returned for recirculation. Like in the drilling mud system, the recovered slurry is drilling fluids, it can be reused in drilling mud system, in waste water treatment system, the recovered slurry is water, which can be reused in the waste water treatment plant. And in some cases, like in the barite recovery treatment, the solids are returned to the active system and the liquid is discarded, or goes to further treatment processing.

GNLW363C-FHD decanter centrifuge is fully hydraulic drive. Th Full hydraulic driven system is imported from leading brand from Switzerland. The bowl speed and conveyer speed of GN FHD decanter centrifuge is adjustable within the permitted range. It can achieve independent, step-less and large-range speed regulation for the bowl and conveying. The bowl speed and conveyer speed during working is showing on the screen.

The advantage of the full hydraulic drive centrifuge is for use in high temperature ambient for heavy mud with flexible bowl and differential speed. The compact one skid design makes it easier for rig up.

GN FHD decanter centrifuge is composed of bowl assembly, collection box, hydraulic drive system, electrical control panel, drive motor, vibration switch (optional), case, base assembly, and skid.

During decanter centrifuge operation, drilling mud or slurry is pumped through the feed tube into the center of the rotating conveyor, where it splashes against the feed accelerator. Screw pump is widely used as feeding pump for decanter centrifuge, besides screw pump, centrifugal pump and submers. The high velocity slurry is then dispersed out four feed nozzles mounted in the periphery of the conveyor cylinder. Rotating at a higher speed than the conveyor, the bowl creates an additional shearing effect, which further increases the slurry’s acceleration. The depth of the slurry in the bowl (pond depth) is determined by the setting of weirs on the liquid bowl head (large end of the bowl).

This week, a full package of compact oily sludge separation system was finished from GN factory in Beijing China. The compact design fast movable oily sludge treatment system is purchased by a reputable Environmental Solutions Company from China domestic market.

There are 3-stage separation equipment included in the oily sludge treatment system.

1) There is a 2-panel small footprint shale shaker equipped in the system for coarse solids separation. The model is GNZS752. As mostly, the oily waste come out from different sources and it is mixture of different wastes. There may be big size solids in side. The big sides solids may block or even broken the centrifuges. The small size shale shaker is used to remove the possible big size solids in the sludge.

2) There are 2 centrifuges in the oily sludge treatment system. The first centrifuge we call it decanter centrifuge. The decanter centrifuge model is GNLW224, it is a 2-phase separation centrifuge. The 2-phase decanter centrifuge is help to remove solids or soil from liquid mixture. The 9 inch centrifuge is a min size decanter centrifuge. The bowl diameter is only 9 inch, but the bowl length and diameter ration is up to 4. The longer ration can help to get cleaner liquid. It is the smallest centrifuge from GN Solids Control for industry separation.

3) The second centrifuge inside the oily sludge treatment system is disc centrifuge. It is also called 3-phase centrifuge. As the name mean, the disc centrifuge can separation oil, water and soil.

Many people may wonder: in case the disc centrifuge can separate and get oil, water and soil. While you add 2-phase decanter centrifuge inside the system? Really, the 2-phase decanter centrifuge is surely not to increase the cost. The disc centrifuge can only allow liquid mixture with liquid content less than 3%. Otherwise, it will damage the centrifuge. While the decanter centrifuge can allow liquid with solids content up to 15% ~ 20%. Decanter centrifuge is a necessary as pre-separation before disc centrifuge.

GN Solids Control was firstly known as a manufacturer of drilling fluids recycling equipment that are used to remove the solids in the drilling fluids, thus the drilling fluids could be reused. In China, there are several this kinds of manufacturers who can fabricate the traditional solids control equipment like shale shaker, mud cleaner, agitator and mud tanks.
Keeping improving is one of GN’s features. In the past few years, GN has invested a lot on upgrading the traditional solids control equipment to make it easier for operation. Moreover, GN has developed many new products that keep GN a leader in the solids control industry. In the year of 2016, GN released the system for hydrocarbon recovery. It is an effective solution to treat the waste oily sludge.

Oil-sludge-Recovery-System

Oil Sludge Recovery

GN’s hydrocarbon recovery system is a three phase separation system. It includes primary coarse solids separation shaker package, fine solids separation centrifuge package and oil & water separation package.
The working principle of GN hydrocarbon recovery system is to remove the solid particles step by step from the oil sludge. The high G force drying shaker unit is equipment with hot water spraying system for better washing performance, this process will remove most of the oil content on the solids.
Decanter centrifuge is equipped with chemical dosing system for fine solids separation after demulsification process. GN’s dosing system could be used in all kinds of dewatering system for ultra fine solids separation.
The liquid discharged from the decanter centrifuge flows into the oil water separator package. Here an inclined plate clarifier is installed for further removing the remaining silt in the liquid for clarifying the oil and water mixer. Then the liquid mixer flows into the micro bubble separation for oil and water separating.
GN’s hydrocarbon recovery system makes GN a real separation solution provider other than a solids control equipment manufacturer. GN would like to communicate with all the clients on this hydrocarbon recovery system.

Vertical rotating drilling rig is the normal machine used in piling project. During the drilling process, in order to protect the inner wall of the drilling hole and speed up the process, the operator always chooses to use drilling mud. Then here comes another problem how to reduce cost of the drilling mud thereby to reduce the cost of drilling. The solution is to use mud recycling system to make the drilling mud reusable.
The purpose of the mud recycling system is to remove the large size solid particles in the drilling mud by several separation machines. In regards to the mud recycling system for piling project, it could be a very compact design as separation process is not so complex as that for oil gas drilling. GN solids control is one of the most experienced separation solution providers who could provide the mud recycling system for almost all the industries will use it. GN already developed the standard mud recycling system especially for the piling project.

gn-de-sanding-unit-piling

De-sanding Unit

Strictly speaking, the mud recycling system used in piling should be called de-sanding unit as the drilling depth is normally shallow and most of the solid particles are sand. A de-sanding unit would be enough for processing the separation to get the expected reusable drilling mud.
GN’s de-sanding unit is a compact structure 2 steps separation system. The main equipment in this de-sanding
unit is combined with a 2 layers shaker and cyclone manifold. The double layers shaker is used for coarse solids separation by the under layers and the upper layer screen is for drying the slurry discharged from the cyclone unit. The tank under the shaker unit is used to store the drilling mud. One centrifugal pump is installed in the system for transferring the mud to the cyclone unit for sand separation.
This de-sanding unit could be connected with extra mud tank for larger capacity mud storage. The operators can also equip a jet mixing unit to make an self-contained mud recycling system for other drilling project like HDD and water drilling.

Solids control is one of the main jobs where GN’s centrifuge could be used. Now the latest design of GN decanter centrifuge is the C version with premier configuration.

By the end of this year, 2 of GN premier decanter centrifuge caught up the last ship to Latin America for the solids control job there.  Below are the main features of this premier model.

solids-conrol-centrifuge

Solids Control Decanter Centrifuge

  1. High level material used for the rotating parts. The bowl is the core part of the centrifuge unit; the separation is process when the bowl is rotating. GN uses duplex stainless steel 2205 to make the bowl with centrifugal casting technology. The evenly material distribution ensures the excellent balance performance when rotating. Inside the bowl the scroll is made of SS316L which is much better than the other China suppliers who are using SS304.
  2. All around protection is put on the parts that will bear a lasting friction coming from the solids. The scroll is protected by 4mm thick tungsten carbide tiles that are replaceable for longer lifetime. The outlet port of liquid speeding up cone on the scroll is covered with ceramic liner. The same ceramic liner is also installed at the solids discharge port on the bowl. To prevent the building up of solids in the collection box, the tungsten material scrapers are fixed on the bowl to protect the bowl from wearing.
  3. To ensure the treating capacity, GN makes the slurry feeding direction and solids delivery direction same. This will speed up the solids delivering in the bowl. On the scroll blade, there are several openings allow the liquid passing through for large flow rate.

GN premier decanter centrifuge is also widely used in waste management like the waste cuttings treatment and the oily sludge recovery project. For safety consideration, GN premier decanter centrifuge is equipped with DNV lifting certified skid for transportation.

Shale shaker is very common equipment used in the drilling mud recycling system. Its function is the first stage for remove the coarse solids in the drilling mud. Sometimes, we may see the double layers shale shakers are installed in the mud system. Below we would like to share some information on how the double layers shale shaker works in the mud recycling system.
Some mud system may has limitation on the footprint, thus, the operators would like to equip a shale shaker with high treating capacity but compact structure. The double layer shaker no doubt is the ideal choice.

shale-shaker

Shale Shaker

For shale shaker application – when the unit is used as primary shale shaker, it is located at the very beginning of the mud system. As we know, the shale shaker unit has buffer box for mud feeding into the shaker unit. The mud overflow out from the buffer box would flow into the upper shaker screen panels with coarse screen for larger size solids separation. The lower screen panels would be much finer for small solids separation. Double layer shale shaker will have a relative larger capacity; in the meanwhile, it can remove out smaller
solids.
For Mud Cleaner application – Shale shaker can also be used as underflow drying shaker by combining with hydro cyclone unit. This type mud cleaner functioned as both shale shaker and cyclone unit. The lower screen with coarse mesh is for larger solids separation, and the upper screen with fine mesh is for drying the slurry discharged from the cyclone.
GN now has main two models of double layers shale shaker. One is coming from the shaker model of GNZS703. Its deformation GNZS706 double layer is for larger capacity shaker and GNZS705 for mud cleaner unit. The other is GNZS752; it can be upgraded to GNZS753 double layers. These double layer shale shakers are widely used in GN’s compact design mud recycling/de-sanding unit for area limitation project.