Author: admin

A set of Construction Mud Solids Liquid Separation Equipment are ready for shipment. The construction slurry separation system are designed per client’s request to meet their applications.

Below are the major separation and processing equipment included in the treatment system:

1.Linear motion dewatering shale shaker. The shaker model is GNLMZ1236. It is a big size shale shaker for coarse separation.

GN dewatering vibrating screen-linear motion is widely used in beneficiation, coal preparation, building materials, metallurgy, chemical industry and other industries. In the beneficiation industry, it is commonly used for desliming, dewatering, demineralization and dry discharge of tailings of iron ore, nonferrous metal ore, coal mine and other materials.

2.Double deck shale shaker. The model is GNZS706. The shaker model can be linear motion or dual motion. The double deck shale shaker has 3 screen panels at bottom deck and 3 screen panels at upper deck. It is used after dewatering shale shaker to remove the fine particles. The double deck shale shaker is widely used for non-oil mud separation.

3.Mud cleaner separator, the under flow shaker model is GNZJ703. It is single deck shale shaker which use the same size screens as double deck shale shaker GNZS706.

4.Big bowl decanter centrifuge. The model is GNLW553. The GNLW553 (High Volume-Big Bowl) centrifuge is supplied with a 22 inch diameter bowl which has a length over diameter ratio of 3.3:1 for effective removal of low gravity solids from the active drilling fluid system.The centrifuge is widely used for various types slurry dewatering treatment.

5.Chemical dosing dewatering unit. It is used together with decanter centrifuge for ultra fine solids separation.

The dewatering unit which is composed of high speed decanter centrifuge and chemical dosing unit are fixed inside a modified container. In this case, it is easy for movement and layout at jobsite. And the design is more compact for less footprint.

GN Solids Control makes 2-phase and 3-phase decanter centrifuge with fixed speed control, FHD control or VFD control.

The VFD panel of GN Solids Control VFD decanter centrifuge is equipped with vortex self-cooling system. GN Solids Control will ask clients what is the max. ambient temperature in summer at their job site? For high temperature areas, GN Solids Control will make high standard VFD panel with A/C cooling system for for self-cooling.

As 3-phase centrifuge can only allow slurry with max. 10% solids content and particle size less than 2mm, 2-phase decanter centrifuge is must to be used before -phase separation to reduce the mud weight and solids percentage. After 2-phase centrifuge separation, the oil, water and soil mixture slurry flow into 3-phase decanter centrifuge to get oil, water and soil.

In order to remove as more ultra fine solids as possible, chemical dosing unit will be used together with decanter centrifuges for dewantering flocculation treatment. GN Solids Control can offer the 3-tank antomatic chemical dosing unit. It is used for powder chemicals. If clients will use liquid chemical, GN Solids Control have other options to fit for neither powder chemicals or liquid chemicals, or both.

As most clients may know, the pre-separation equipment for OBM cuttings and oil sludge is different. For pure OBM cuttings from shale shaker and mud cleaner, Vertical cuttings dryer is better. It can reduce the oil on the cuttings to 3% ~ 5%. It can remove more usable liquid. And the solids discharge is very dry.

But vertical cuttings dryer cannot be used to treat the soil sludge discharged from centrifuge. As its screen basket opening is 0.5mm, 0.35mm and min. 0.25mm. The soil cake from centrifuge is very fine and will all pass the screen opening.

Oil sludge is normally the mixture from different application, like drilling mud, drilling cuttings, soil cake from centrifuge separation, tank bottom slurry, slope oil, refinery waste oil slurry, industry waste oil, etc… The solids size and solids content is more complex. In this case, high G drying shaker is used for pre-seperation. And as the oil slurry is more complex, sometime, need to dilute and heating the sludge before separation. The solids waste discharge from High G drying shaker is with higher oil on the cuttings after separation. For example, before treatment the sludge with 15~20% oil content. After high G drying shaker, maybe around 10~15%, or even higher if the sludge with high viscosity and density.

 

GN Solids Control offers 2-phase separation and 3-phase separation on OBM and oil sludge treatment solution. Vertical cuttings dryer, high G drying shaker, 2 phase decanter centrifuge, 3 phase decanter centrifuge, 3 phase disc centrifuge are the major separation equipment used for the process. Job site operators can choose the suitable separation device to suit for the material situation and clients’ separation demands.

Chemical dosing unit is a necessary device to use together with the separation device. GN Solids Control has various sizes and various type of chemical dosing unit for liquid chemicals and powder chemicals.

For recover the usable drilling mud from OBM cuttings and WBM cuttings, major separation equipment is vertical cuttings dryer, high G drying shale shaker, and decanter centrifuge. The separation equipment can be laid on the same skid for compact design. Or vertical cuttings dryer / high G drying shale shaker and decanter centrifuge are put on different skids for flexible layout and easy movement.

Many clients want to know more and understand better of the equipment to treat OBM and WBM, all (vertical cuttings dryer, Decanter centrifuge, Screw Conveyor) are necessary to effectively treat oil base mud cuttings, and High G dryer, decanter centrifuge to effectively treat water base mud cuttings.

A client contacted GN Solids Control, they would like for package Solution to be installed next to concrete oil base mud tanks that they will build on their yard in order for OBM to be pulled directly from tanks to treatment solution. GN Solids Control can design layout of this all process to meet for clients’ request.

Regarding Decanter centrifuge, GN Solids Control can make 2-phase decanter centrifuge to separate liquids and solids phase. GN Solids Control is also capacity to make 3-phase decanter centrifuge which is able to separate Oil, Water and Solids. The tricanter centrifuge can help to extract and recover the oil from the mud.

GN Solids Control is now working on the packing of a 1500GPM drilling mud cleaner for a drilling company in China. The drilling mud cleaner model is GNZJ594F-3S16N. It is a combo type 3-in-1 mud cleaner, which is composed of a single deck 4-panel shale shaker, number 3 desander cones, and number 16 desilter cones. The desander cone size is 10 inch, cut point of the 10 inch desander cone is 47 microns. The desilter cone size is 4 inch, cut point of the 4 inch desilter cone is 27 microns.

The 3-in-1 mud cleaner is for 2 steps solids control separation. Shale shakers are used before the mud cleaner. For 1500GPM mud cleaner, qty 3 shale shakers are recommended before the mud cleaner. After the dirty drilling mud pre-separated by the first stage solids control shale shaker, the recovered drilling mud will be transferred to desander separator and than fed to desilter separator for the 2 steps separation.

According to the vibration type, the shale shakers can be divided into 4 types:

1. Ordinary elliptical motion shale shaker: during operation, the screen box moves in a circular track and makes a pitching motion around the center of mass.

2. Circular motion shale shaker: the screen box moves in a circular track during operation.

3. Linear motion shale shaker: the screen box moves in a straight track during operation.

4. Translational elliptical vibrating screen: during working, the screen box moves in a translational elliptical track.

GN Solids Control makes linear motion shale shaker and dual motion shale shaker. Beside shale shaker and mud cleaner, GN Solids Control can make other drilling mud treatment equipment as well as drilling waste management equipment, like vacuum degasser, decanter centrifuge, mud gas separator, mud agitator, mud gun, centrifugal pump, screw pump, screw conveyor, sludge and solids transfer vacuum pump, high G drying shaker, vertical cuttings dryer, etc…

Screw conveyor is a popular transfer device used at oil and gas drilling site. It can collect drill cuttings from solids control equipment, like shale shaker, mud cleaner, or desander, desilter, and it can used to transfer drill cuttings to cuttings dryers, vertical cuttings dryer, cuttings box, cuttings pits, etc…

GN Solids Control makes 5 sizes auger diameter: 10 inch, 12 inch, 14 inch, 16 inch and 18 inch. GN Solids Control makes 12ft per section as standard length. Clients can choose the auger diameter and section quantity per their needs. GN Solids Control makes various sizes screw conveyor, the transfer length is from 12ft to 48ft.

The driving unit of screw conveyor is composed of helical bevel gearbox reducer, explosion proof motor, driven section, middle section, and feed section. The gearbox reducer and motor is combined by the flange.

The Augurs are sometimes inclined at an angle, particularly the Secondary Augur. Normally, the first screw conveyor is laid at shale shaker and mud cleaner in horizontal. And then there are other augers next to the horizontal auger to transfer drill cuttings to requested position. Some clients said they faced the problem that, the oil may come from gearbox reducer to motor. Clients want isolation plate between gearboxes and Electric Motors for screw conveyors electric Motors to prevent Lubricating Oil from going into the Electric Motors.

GN Solids Control provide good quality oil seal between gearbox reducer and motor to prevent oil to enter into the motor. The screw conveyor impellers are made of wear-resistant and thicker manganese steel. According to the clients’ special requirements, the screw conveyor impellers can also be sprayed with wear-resistant coating to extent the service life of the screw conveyors.

Besides screw conveyor, GN Solids Control can also offer other transfer equipment, like centrifugal pump, slurry pump, screw pump, solids and sludge vacuum pump, etc…

Mud tank is a basic device for drilling mud solids control system. Drilling mud tank looks sample. It seems easy for fabrication. The difficulties lie in design and pipelines to allocate all equipment. It is difficult to design the mud tanks to suit for clients demands on requested separation equipment and mixing system.

As every jobsite has different request for mud tank size, the number of mud tanks, mud tank usable capacity, the layout of mud tanks, and most clients have different request on separation equipment and mixing equipment, they request different models and numbers of shale shaker, desander, desilter, decanter centrifuge, jet mud mixer, pumps, etc… In this case, nearly every mud system is different. It is a big work to make the mud tank system designs and drawings, and need to change the designs and drawings again and again during the communication with clients. It is a huge work to make full package mud tank systems. It has high request on the manufacturers’ capability.

Shale shaker is a basic separation equipment. There are various types of shale shakers, like 3-panel shale shaker, 4-panel shale shaker, single deck shale shaker, double deck shale shaker, etc… Shale shaker is nearly used for all separation system. And it is the 1st stage solids control separation equipment in mud systems.

There is normally a sand trap under the shale shaker. The drilling fluid enters the drilling fluid mud tank system after passing through the shale shaker screen. The sand trap plays a very important role in the daily use of 80 mesh screen cloth or coarser screen cloth.

The bottom of the sand trap should be inclined by 45 ° to promote the sedimentation of large sand particles and rapid discharge outside the tank. The bottom inclined by 45 ° or more has a self-cleaning effect. The sand trap shall not be stirred, but shall enter the lower tank through overflow. Both linear and balanced elliptical motion drilling fluid shale shakers have this technology. Fine cobalt chips generally do not have enough residence time to precipitate. When cheap drilling fluid is used, the grit pump shall pump 1 ~ 2 times every 1H. At present, ultra-fine mesh screen cloth is widely used. Due to the expensive waste treatment cost and environmental concerns, such discharge is not allowed and the cost is limited.

After shale shaker, there are various types of separation equipment, clients can choose per jobsite demands and jobsite situation, like 3-in-1 mud cleaner, desander, desilter, vacuum degasser, middle speed decanter centrifuge, high speed decanter centrifuge, jet mud mixing unit, etc…

Centrifugal separation is the process of separating heterogeneous mixtures such as liquid – solid, liquid – liquid – solid and liquid – liquid by centrifugal force. The process is divided into three types: centrifugal filtration, centrifugal sedimentation and centrifugal separation. The corresponding centrifuges are also divided into three categories: filtration centrifuges, sedimentation centrifuges and centrifugal separators.

Decanter centrifuge is widely used in oil field to treat drilling mud, drilling cuttings, and oil sludge and waste water generated from the drilling activities.

GN Solids Control makes various sizes of 2-phase decanter centrifuge, 3-phase decanter centrifuge, vertical centrifuge (normally called as vertical cuttings dryer), and disc centrifuge. GN Solids Control is capable to make explosion proof centrifuge to suit for hazardous environment, and non-explosion proof centrifuges for safety areas.

According to clients request and the application requirements on rotating speed and conveyor speed, GN Solids Control can make fixed speed control centrifuge, variable frequency control (VFD) control centrifuge, and full hydraulic drive (FHD) centrifuges.

Below are the major components of decanter centrifuge:
The rotating assembly:
The rotating assembly consists of a cylindrical stainless steel bowl, conveyor assembly, and related components. The bowl has openings at both ends: A conical head at the solid discharge end and a flat liquid bowl head at the opposite end. The bowl ends are supported by greased ball bearings.

The bowl assembly:
The bowl assembly consists of a cylindrical bowl closed on one end by the liquid bowl head and at the other by the solid bowl head.

Screw Propeller or the conveyor assembly:
The conveyor assembly is a hollow, cylindrical auger that receives the inlet slurry into its interior, disperses it through nozzles to the bowl assembly, and transports the solids to the solid discharge
outlet.

Besides centrifuge, GN Solids Control make other separation equipment to treat drilling mud and drilling cuttings, like shale shaker, high G drying shaker, desander, desilter, mud cleaner, etc…

GN Solids Control makes various sizes of oil sludge separation system. GN Solids Control is capable to make and offer the full package separation solution on various types of oil sludge. Double deck shale shkaer, decanter centrifuge and disc centrifuge are the major separation equipment used in oil sludge separation system.

Many clients are not familiar with disc centrifuge. Below is a detailed introduction of the disc centrifuge.

Disc centrifuge is a kind of sedimentation centrifuge, which is used to separate difficult materials, such as suspension composed of viscous liquid and fine solid particles, or emulsion composed of liquid with similar density, etc. Disc centrifuge is one of the most widely used sedimentation centrifuges.

Disc centrifuge is mainly used for 2 applications:

1) Liquid – solid separation (i.e. separation of bottom concentration suspension), it is also called clarification operation; It can be used to treat waste water or waste slurry, and recover liquid from waste slurry.

2) Liquid – liquid separation (or liquid-liquid-solid) separation (i.e. separation of emulsion). It is called as separation operation. It is widely used in oil sludge treatment system. Disc centrifuge is equipped after 2-phase decanter centrifuge. After disc centrifuge, operators can get oil, water and soil. It is liquid – liquid – solids separation.

The disc separator is a kind of vertical centrifuge. The drum is installed on the upper end of the vertical shaft and rotates at high speed driven by the motor through the transmission device. There is a group of disc-shaped parts – discs which are nested and stacked with each other in the drum. There is a small gap between discs.

The suspension (or emulsion) is fed to the drum through the feed pipe located in the center of the drum. When the waste slurry or oil sludge (or emulsion) flows through the gap between the discs, solid particles (or droplets) settle on the discs under the action of a centrifuge to form a sediment (or liquid layer). The sediment slides along the surface of the disc and separates from the disc and accumulates at the position with the largest inner diameter of the drum.

The separated liquid is discharged from the outlet of the drum. The function of the disc is to shorten the settling distance of solid particles (or droplets) and expand the settling area of the drum. Due to the installation of the disc in the drum, the production capacity of the separator is greatly improved. The solid accumulated in the drum shall be removed manually after the separator is shut down, or discharged from the drum without shutdown through the slag discharge mechanism.

There are many kinds of centrifugal pump for various material transfer in various field. The drilling mud centrifugal pump is also called as sand pump. Centrifugal pump is widely used for oil and gas drilling mud system,horizontal directional drilling (HDD) fluids transfer. GN Solids Control makes various sizes centrifugal pump to meet for various applications.

Impeller is an important part of centrifugal pump to transfer and convert energy. Through the impeller, the mechanical energy of the motor is transformed into pressure energy and kinetic energy. The impeller is composed of front and rear cover plates (impeller discs) and curved blades. According to whether there are front and rear impeller, it is divided into closed type, semi open type and open type impeller.

In general, the pump conveying sundries adopts open impeller. The tank injection pump and sand pump, as well as drilling mud pump adopts semi open impeller, while the slag pump adopts closed impeller. Through investigation, it is found that the most easily worn part of the semi open sand pump impeller is the origin of the blade. Due to the ball impeller out! High strength and uniform wear. At the same time, when the wear increases the gap between the suction end side cover plate and the front side, the performance of the pump is more stable.

GNSB Series centrifugal pumps are designed with the following characteristics. Below are some features of the GN Solids Control centrifugal pump design:

1. GN Solids Control centrifugal pump adapts composite mechanical seal. It means the mechanical seal is installed in the inner end of the sealing box, the auxiliary packing seal mounted in the outer end. The double sealing makes the sealing more reliable.

2. The impeller of GN Solids Control centrifugal pump adapts open vane structure.

The open vane structure impeller reduces the shaft load greatly, and it is running more smoothly and performs more efficiently.

3. GN Solids Control centrifugal pump is with Higher output and high efficiency. The impeller profile complying with the hydraulic principle, it can increase the output and efficiency.

4. GN Solids Control centrifugal pump adapts wear-resistant materials for the key parts to prolong the service life

5. More choice. GN Solids Control offers a variety of pump casing and impeller. It can meet different demands of different customers.

Some sets of drilling mud solids control decanter centrifuge and drilling waste vertical cuttings dryer are ready. They are customized for an international drilling company. It is not the 1st time the client buy from us. All their drilling rigs are equipped with GN Solids Control drilling waste management equipment. There is a fixed speed decanter centrifuge, a VFD decanter centrifuge and a vertical cuttings dryer for a drilling rig for drilling mud and drilling cuttings treatment.

There are fixed speed decanter centrifuges, Variable frequency speed decanter centrifuges included in the project. Even for the fixed speed decanter centrifuge, GN Solids Control can offer another set of pulley and belt for another fixed speed control.

GN Solids Control offer German brand NETZSCH pump as feeding pump for decanter centrifuges. The feeding pump screw pump control is inside the decanter centrifuge control panel. There are interlock between decanter centrifuge main motor and back drive motor, and the pump motor. As the 3 motors must be started and stopped in order. It is to protect decanter centrifuge from overload. With the interlock control the feeding pump can be stopped automatically in case of too much mud feeding.

There is a lubricating oil system for the vertical cuttings dryer. The lubricating system must be started before the vertical cuttings dryer main motor start running. The oil system drive pump motor is included in the vertical cuttings dryer control panel to start oil pump for some minutes and then to start the main motor. GN Solids Control offers German brand NETZSCH pump as flush pump for vertical cuttings dryer. Screw pump flush pump control is included inside the vertical cuttings dryer control panel.

GN Solids Control offers telescopic skid for decanter centrifuges, VFD control panel and screw pump are mounted on the skid. GN Solids Control offers heavy duty skid for vertical cuttings dryer. Screw conveyors are used together with decanter centrifuges and vertical cuttings dryer to transfer drill cuttings.