Author: admin

When talking about the function of vibrating screens in mining industry, we cannot bypass the beneficiation. As is known to all, useful minerals and useless gangue are usually coexisting with each other. People have to do something to separate them from each other, for example, the . procedure of crushing ores, then enriching useful minerals and discarding useless gangue. All these procedures are include in the topic of beneficiation. For example, for coal, the process of separating coal from grinding stone to obtain products of different quality is called coal preparation.

GN Vibrating Screens

In nature, except a few minerals which are liquid (such as mercury), most of them are in solid type. Solid minerals have certain crystal structure and physical and chemical properties. In raw ore or coal, the separation of useful components and useless gangue or grindstone through beneficiation is basically based on the differences in physical properties, surface physicochemical properties and chemical properties of minerals. Mineral properties directly related to mineral processing mainly include density, magnetism, conductivity, wettability, etc.

1. Density refers to the mass of mineral per unit volume, which is the basis for gravity concentration.
2. The magnetism of a mineral is the property that it is attracted or repelled by a magnet. General minerals can be divided into strong magnetic minerals (such as magnetite, etc.), weak magnetic minerals (such as hematite, etc.) and non-magnetic minerals (such as diamond, hematite, etc.). Mineral magnetism is the basis of magnetic separation.
3. Electrical conductivity refers to the electrical conductivity of minerals. Generally, minerals can be divided into good conductors, semiconductors and non-conductors, which are the basis for electrical separation.
4. Wettability refers to the property that minerals can be wetted by water. The minerals easily wetted by water are called hydrophilic minerals (such as quartz, calcite, etc.); On the contrary, it is called hydrophobic mineral (such as chalcocite, graphite, etc.). The natural wettability of minerals mainly depends on the crystalline structure of minerals.

Function of mining vibrating screens are working based on the physical properties of minerals.

Solids Control system is an essential part of a drilling rig system, which is used for remove the drilling cuttings from the expensive drilling mud. In this way, the clean mud can be returned to the drilling procedure and to be reused. On the other hand, it is also protecting the environment by discharge less waste.
In a complete drilling solids control system, there should be shale shakers, mud cleaner, decanter centrifuge of middle speed, decanter centrifuge of high speed and the feeding pumps for the mud cleaner and centrifuges.
Just recently, GN Solids Control, the leading manufacturer in China in solids control industry, has provided a client from South America totally 3 sets of solids control equipment, including following:

1. shale shakers with model GNZS594J for 3 packages, totally 12 sets.
2. Mud cleaner, GNZJ594J-3S16N, each rig system need 1 set of mud cleaner to play the roles for desander and desilter cones.
3. Centrifugal pumps for desander and desilter cones, they are same as mission magnum centrifugal pumps.
4. Middle speed decanter centrifuge for each package, with model GNLW363D-GP.
5. High speed decanter centrifuge for each package, with model GNLW363D-VFD.
6. Screw pumps for each centrifuge as feeding pump.

Functions of each equipment: in fact, the solids control system are used for removing the drilling cuttings from the mud in a physical way, which means, each step of separation is based on the drilling cuttings’ particle sizes. The shale shakers are used to remove the most particles larger than 100 microns. Desander and desilter are working with centrifugal force generated by the cyclones’ structure, and their cuttings points are respectively 40 and 20 microns. The middle speed centrifuge are used for removal of particles from 5 to 7 microns, which here means barite recovery. And the high speed centrifuges are used for removing particles from 2 to 5 microns, extra fine ones.

If you need equipment like this or a turnkey solution even including tanks, please contact GN directly.

Drilling companies or drilling contractors are always rig owners who win projects all over the world drilling for oil exploration companies. Along with each rig, there is a solids control system, and a solids control system is comparably independent system among the 8 systems for a rig.

In a complete solids control system, there are following equipment involved:

Shale shakers, desanders, desilters, degasser, decanter centrifuges and pumps. In a recent project, a China drilling company has just purchased from GN Solids Control following equipment for a solids control system：

1. Desander GNZJ752J-1S. The desander cones are located after the shale shaker, which is used to remove particles above 40 microns. For this desander, there is a drying shaker with 2 pieces of shaker screens and a screen size of 1.35 square meter. Normally for weighted mud there should be a desander or desilter with underflow shaker. Here it is a one desander model with a 10 inch diameter desander cone.

2. Desilter GNZJ752J-8N. This desilte is located after the desander. It is called desilter cause it is used to remove particles larger than 20 microns which are mostly sized as silt. Same as the desander, it has an underflow shaker, too. Both the desander and desilter are fed by centrifugal pumps.

3. Vacuum degasser GNZCQ270B. Vacuum degassers are located after the shale shaker while before the cyclones. GN Vacuum degasser has no need of a large power. Instead, it can be regarded as a large agitator. GN Solids Control has 2 models of vacuum degasser available and the GNZCQ270 is the smaller one. Besides the vacuum degasser, GN Solids Control also has centrifugal degasser available.

In fact, GN is even more professional for design a complete turnkey solution involving all equipment like shake shakers, mud cleaners, middle speed decanter centrifuge and high speed decanter centrifuges. And all pumps needed in the solids control system are available.

The year 2022 now comes into the last month, and GN factory is still fully scheduled with new orders from all over the world. Recently, GN just finished the manufacturing for a batch of double deck shale shakers for oil and gas solids control for an European client.

GNZS706 double deck shale shaker has following features:

1. The shaker model is GNZS706, which means there are totally 6 pieces of shaker screens on the shaker. 3 pieces of screens are mounted on the upper deck, with a total screen area of 2.0 square meters and the lower deck also has 3 pieces of shaker screens with a total screen area of 2.6 square meters. Total screen area is 4.6 square meters.

2. Working principle of the double deck shaker: the upper deck of shaker is equipped with coarse screens as the 1st step separation and the lower deck we use comparably finer screens. In this way, the treating capacity is increased and the screen mesh is better protected for longer life.

3. GNZS706 double deck shaker has the quick pressing device for changing shaker screens easily and quickly. And such device is quite durable for performance. This function highly facilitates the operators when changing shaker screens.

4. GNLW706 double deck shaker uses 2 sets of vibrating motors which generate a linear motional high G force. It is suitable for both land rigs and offshore projects.

5. The shaker screens used on GNZS 706 Shale shakers are also made by GN Solids Control. GN Solids Control has a separate shaker screen factory with robot cutting and welding, producing high quality shaker screens.

Other famous solids control brands also have double deck shakers available, for example, VSM 300 from NOV Brandt is quite a popular model in Europe. Client for this order is buying GNZS706 for replace the existing VSM 300. GN Solids Control also has single deck shale shaker models, with 2 or 3 or 4 pieces of screens. For more information, welcome to contact GN direcdtly.

Each year, GN Solids Control makes and sells tens of solids pumps in different sizes. The solids pumps are widely used in many industries, like the oily sludge transfer, slurry transfer, sand transfer even containing small stones, animal waste and etc. Some clients are even using a small sized mini solids pump for cleaning the waste on bottom tanks, during which the solids pump could serve the function as a vacuum cleaner we daily use in houses.

 

About GN Solids Control

1. The pump is fully air driven. Yes, exactly, cause the solids pumps are really designed as a vacuum cleaner, and it has another name, which is a vacuum pump. It is called a vacuum pump because it is driven by air and helped by an air compressor. The air compressor generated a gas force to the pump and the pump uses travel valves, delay valves and some other parts to suck and push the materials in and out by using the compressed air. Instead, a vacuum pump itself has no need for electricity.

2. Features of vacuum pumps. The air force is high, so the pump is quite powerful. For example, the largest vacuum pump is GNSP-40B among GN vacuum solids pumps and it can suck materials from 500 meters far and discharge to up to 1000 meters away. Even the half sized GNSP 20B can discharge the material to 500 meters distance.

3. Special functions for a mini vacuum pump. Comparing with a large vacuum pump, the mini pump is more compact in structure and equipped by some wheels for easy movement. With a handle, it can be dragged from here to there, just like when you are using a vacuum cleaner at home. GN provides 3 types of inlets for the vacuum pump to make it suitable for different materials.

For more information, welcome to contact GN directly.

According to the environment protection laws and regulations in many countries, the drilling waste management system is mandatory for a drilling rig’s solids control system. A complete drilling waste management system includes 2 systems, one is to treat the drilling cuttings discharged by the solids control shale shakers, which is used for reduce the cuttings for a safe discharge, and also for recovery of the drilling fluids. The other is drilling fluids waste management, which is used to remove the extra particles in the drilling fluids after a long time recycling in a solids control system.

1. Drilling cuttings waste management system. In a word, this system’s first mission is to minimize the cuttings to be discharged. Based on different mud type, the first separation equipment is different.

1.1. For oil based mud, which is used in most of drilling fields, a vertical cuttings dryer is more efficient. A vertical cuttings dryer is a high speed rotating machine which uses the centrifugal force to splash the liquid to through a mesh while the same mesh is used to block the cuttings. GNCD930 series vertical cuttings dryers can reduce the oil on cutting to below 5%.

1.2. For water based mud, a high G drying shaker is a better choice. It is similar as a shale shaker. And the main differences from a solids control shale shaker are: a high G shaker has a larger G force and the feeding of a high G shale shaker is like a hopper.

2. The second step for separation, for both the OBM cuttings and WBM cuttings is always a high speed decanter centrifuge, which is used to remove the finer solids particles in the liquid after the first equipment’s work. Unless a solids control centrifuge, this centrifuge for drilling waste management is always equipped by a VFD control panel, which is more flexible for variable mud condition.

Next time we will talk about the drilling waste management system.

Africa is a wide and beautiful land with rich resources including the gold mines and black gold mines, the crude oil. During exploration of the crude oil, the environment protection should be fully taken into consideration, for example, in the drilling mud, there are drilling cuttings to be removed and chemicals to be safely discharged. In this case, an efficient solution for solids control system is quite important. In all countries, the solids control system and drilling waste management system are legally requested.

GN Solids Control, as a professional manufacturer for decanter centrifuges and solution provider for solids control and waste management systems has been cooperating with many companies in Africa. This time, just in last week, GN Solids Control has provided to a client in Africa with a drilling mud solids control centrifuge.

What functions could a decanter centrifuge to serve in a solids control or waste management system for oil and gas drilling?

1. Decanter centrifuge are always located as the 4th stage for solids control, after the desilter cones. Before the centrifuge, there are shale shakers, desander cones and desilter cones, each has a smaller cutting point than last stage. A middle speed decanter centrifuge is always used for recover the expensive barite in the drilling mud.

2. If there is a 5th stage for separation as in many high configuration solids control systems, it should be a high speed centrifuge, too. This centrifuge is used to separate out the cuttings from 2 to 5 microns in the drilling mud.

3. As in many countries in Africa, where there is a drilling rig, along with the solids control system, there should be a drilling cuttings waste management system containing s vertical cuttings dryer and a decanter centrifuge. The vertical cuttings dryer is used to remove the oil on cuttings and the high speed centrifuge is used to remove the small particles in the recovered mud from vertical cuttings dryer.

Those above mentioned equipment are all within GN’s product range. Welcome to consult from GN Sales Team.

HDD is a quite common way for pipeline works in cities or for pipelines across the rivers or so. This word is short for horizontal directional drilling. Just as other drilling, the drilling mud is to be used for HDD and the drilling mud should be well treated and prepared for reuse. A complete mud cleaning system for HDD always includes following steps for separation:

1. Shale shaker. In many mud cleaning systems or so called solids control systems, the shale shaker is always the first step for separation. It is used to remove most of particles and also the largest particles. In those 2 systems GN recently made for SINOPEC, the shale shakers are GNZS703F. This shaker model is quite popular in HDD projects and also used for oil and gas solids control systems. It has a screen area of 2.63 square meters provided by 3 pieces of shaker screens each sized 1250*700mm.
2. Mud cleaner. In fact, in an HDD mud cleaning system, there are always desander cones and desilter cones. Desander cones are of 10 inch diameter, which is used for removal of particles larger than 40 microns. And the desilter cones are of 4 inch diameter for removal of particles larger than 20 microns. A mud cleaner is a combination of desander cones and desilter cones, with a shared underflow shaker for drying.
3. A mud mixing hopper is a must for a HDD mud cleaning system, which is used for adding the loss components into the recycled drilling mud in order to prepare the drilling mud for the future drilling. A mud mixing hopper has a hopper and a centrifugal pump, the hopper can be located together with pump by the mud tank, or on tank top with the centrifugal pump on tank bottom.
4. A decanter centrifuge, which is not a must but quite efficient in high configuration systems. A middle speed centrifuge like GNLW452D is used to remove particles from 5 to 7 microns. And a high speed centrifuge is used to remove particles from 2 to 5 microns.
Welcome to consult GN for more information.

If you are familiar with oil service industry, you must know about drilling waste management systems, which is mainly about 3 kinds of treatments: drilling cuttings treatment, drilling fluids treatment and oily sludge treatment. Among which the drilling cuttings treatment was most commonly requested by laws and regulations.

GN Solids Control is a professional solution provider for above mentioned 3 applications, and recently, GN Solids Control just finished the delivery of a drilling cuttings waste management system including 2 decanter centrifuges and 1 vertical cuttings dryer. Normally, for OBM or SBM’s drilling waste management, there should be a vertical cuttings dryer. In fact, the vertical cuttings dryer is specially designed for the OBM’s drilling cuttings, which can reduce the OOC to 5%. After the vertical cuttings dryer, the liquid phase still contains some fine particles. Those particles could be removed by a high speed decanter centrifuge before being returned to the clean mud tank.

In this system there are following features:

1. A GNCD930 vertical cuttings dryer is located in a container which is easy to be transported by land or by sea. Meanwhile, a well isolated container can keep the vertical cuttings dryer to operate in a comparably warmer condition during winter.
2. There are 2 sets of decanter centrifuges in this system, one for solids control, the other for the OBM drilling cuttings. Traditionally, there are 4 steps solids control in a solids control system, the shale shaker, desander and desilter cones, then the centrifuge. Nowadays, more and more clients are choosing decanter centrifuge to replace the cyclones and put them directly after the shale shaker (sometimes 2 decanter centrifuges are used for solids control, a middle speed one plus a high speed one, although in this project the client uses 1 set for solids control only). And the 2^nd set of centrifuge is used after the GNCD930 for drilling fluids treatment.

Here are some working videos of similar projects to show more information.

https://www.gnsolidscontrol.com/drilling-video

When talking about oil and gas drilling, there is one type of equipment we can never by-pass, which is shale shaker. Shale shaker is located at the first place of a complete solids control system. GN Solids Control has just finished the manufacturing for some dual motion shale shakers for an offshore drilling company.

1. Dual motional shakers. According to the motional type of the shale shaker, the shale shaker could be divided into several types: linear motional, oval motional and dual motional one, as the model GN just provided to this offshore drilling company. This motional means the motion route of the drilling cuttings on the shaker screens during operation, which determines the time the cuttings spend on screens and the positions they fall on screens. GN Solids Control has also linear motional shakers available.

2. GN shaker models. GN Solids Control has various shaker models for option based on different treating capacities, including mini shaker with 2 shaker screens GNZS752F shale shaker, the normal shakers with 3 or 4 pieces of screens, GNZS703F and GNZS594F, with screen size as 2.63m2 and 2,73m2, and double deck shale shaker GNZS706F which can use 2 different screen API’s, the coarse ones on top deck while fine ones on bottom deck in order to achieve a larger capacity.

3. GN High-G shakers. Besides the normal shale shakers used for drilling rig solids control purpose, GN Solids Control also has High G drying shakers available. The high-G drying shakers are used for treating the drilling cuttings collected from the shakers’ discharged material, mainly for water based mud. For the high-G models, GN has models based on GNZS703 and GNZS594, and the vibrating G force can reach upto 8.5. For the similar purpose, the drilling cuttings treatment, GN has GNCD930 vertical cuttings dryer for oil based mud and SBM
For more information, please contact GN directly.