kosun, Author at Solids control system, TBM slurry treatment plant, HDD mud recycling system, Drilling mud system-KOSUN

February 23, 2022February 23, 2022

Advanced sludge solid-liquid separation equipment

KOSUN advanced sludge solid-liquid separation equipment for river dredging solid-liquid separation mainly includes the following modules:

(1) Solid-liquid separation mud tank

The sludge solid-liquid separation is equipped with three sets of mud tanks, which are mainly used to install vibrating screen, de-sand cleaner, de-sludge cleaner and store the treated mud.

(2) Sludge dewatering centrifuge

Sludge dewatering centrifuge is a large drum centrifuge. It is mainly used in shield mud treatment, river dredging and other industries. Stable performance and so on. The centrifuge is also equipped with a circulating oil lubrication system, which can effectively reduce the bearing temperature and improve the bearing service life. It is also equipped with a temperature sensor, which can be monitored and controlled in the control system.

(3) Double-layer shale shaker

Double-layer shale shaker adopts double-layer treatment design. The upper and lower layers are screened twice with different sizes and meshes to obtain better screening effect.

(4) Sand removal cleaner

Desander cleaner is a combination of desander and shale shaker, with a compact structure. The desander adopts two 10-inch desander cyclones, which are used to deal with the solid phase of large particles treated by the shale shaker.

(5) Desilting cleaner

The desilter cleaner is composed of a shale shaker and a desilter. The desilter is composed of 12 4-inch desilter cyclones, which are mainly used to remove solid particles larger than 25 microns in the mud.

(6) Centrifugal pump

Centrifugal pump is mainly used to supply slurry to desander cleaner and deslimer cleaner in the system. The pump adopts mechanical seal, which has long service life and reliable performance.

(7) Screw conveyor

In order to facilitate the transportation of the treated solid phase mud. The design length of the screw conveyor is 12 feet, so that each section can be replaced as a standard unit.

KOSUN- China Solids Control Leader&Drilling Waste Management Expert
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February 7, 2022February 7, 2022

6 Types of Piling Mud Treatment Equipment

At present, regarding the mud treatment of construction piling projects, there are 6 main types of piling mud treatment equipment. According to the different requirements of piling projects, how can we correctly use a type of the 6 types of piling mud treatment equipment that suits our project requirements? Please let me introduce these 6 piling mud treatment equipment in detail for you, so that you can choose a piling mud treatment equipment that is really suitable for you according to your actual engineering situation!

1) Mud processing equipment of stacked screw centrifuge: the filter main is formed by the fixed ring and the floating ring stacked on each other, and the screw shaft runs through it.

body. Fully dewatered by gravity concentration and the internal pressure formed by the back pressure plate during the propulsion process of the sludge, the filtrate is discharged from the filter seam formed by the fixed ring and the movable ring, and the mud cake is discharged from the end of the dewatering section.

Centrifugal mud treatment equipment (decanter centrifuge) The working principle is that the equipment consists of a rotating drum and a screw conveyor with a hollow rotating shaft. The sludge is fed into the rotating drum by the hollow rotating shaft. thrown into the drum cavity. Due to the different specific gravity, solid-liquid separation is formed, and the sludge is transported to the conical end of the drum under the push of the screw conveyor and continuously discharged from the outlet; the liquid in the liquid ring layer is continuously “overflowed” and discharged to the outside of the drum. Gravity discharge.

Vacuum suction filter mud treatment equipment: due to the action of vacuum, the sludge immersed in the sludge storage tank is adsorbed on the filter cloth. When the drum rotates to the backflushing area, the adsorbed sludge is removed by the compressed air backflushing sludge filter cake.

Screening cyclone mud treatment equipment: the coarse screen of the vibrating screen first screens the large particles in the mud, and then enters the cyclone in the desander and the fine filtration process of the fine screen of the vibrating screen. The mud was successfully realized in the state of mud-water separation.

Plate and frame filter press mud treatment equipment: This equipment mainly uses the principle of plate and frame extrusion in a closed state, so that the water in the sludge is discharged through the filter cloth, and the sludge is trapped between the filter cloths. , in order to achieve mud dewatering.

6) Belt filter press mud treatment equipment: The working principle of this equipment is that it is formed by a series of rollers in an S shape, and the capillary water in the sludge layer is squeezed by the tension of the filter belt and the pressure of the rollers, so that the mud The water in the slurry is squeezed out to achieve the purpose of solidification and dehydration of the mud.

The above 6 types of piling mud treatment equipment can solve various problems of piling mud treatment for you very well. Regarding the selection of equipment for mud treatment in construction piling projects, consideration should be given to the efficient utilization of mud recycling, water reuse and turning waste into treasure, reducing pollution and harming the environment, water pollution, environmental protection and energy saving, convenient transportation and low cost, and efficient production. High dehydration rate, economical benefits, reduced construction cost, easy operation and maintenance, high degree of automation, long service life and many other factors.

January 26, 2022January 26, 2022

The subsea valve equipped in the mud tank is a vital equipment

The mud tank has been widely used and developed in the mud solids control system in oil drilling operations. The subsea valve equipped in the mud tank is a crucial equipment. The characteristics of several mud tank subsea valves are described below:

Advantages and characteristics of mud subsea valve: applied to the suction pipeline at the bottom of the mud tank to control the suction operation of the mud in each tank. The valve realizes the arrangement in the suction manifold tank and the operation of the tank surface. That is, the integration of the manifold and the mud tank is convenient for installation and transportation.

2.Advantages and characteristics of mud subsea valve structure: mud tank subsea valve (underflow valve) includes outer pipe, connecting rod, connecting pipe and lead screw. The connecting rod in the pipe is connected, the connecting rod is connected with the sealing rubber set at the inner bottom end of the outer pipe, the sealing rubber is sealed and fitted with the valve base, the valve base is a cone structure with an inclined surface on the inside, and the contact surface between the sealing rubber and the valve base is with the valve base For the slope with the same slope, the sealing rubber is fixed by the upper and lower two circular metal plates; the connection part between the outer tube and the outer cylinder of the lead screw is above the surface of the tank. The utility model improves the sealing performance of the subsea valve itself, and the conical surface sealing structure reduces the axial bearing capacity of the lifting screw to the sealing rubber by about 20%, thereby prolonging the service life of the rubber, and the connection part between the outer pipe and the outer cylinder of the screw is reduced by about 20%. Raised above the surface of the tank to meet the requirements of rapid maintenance. The operation realizes the control of the mud tank surface, which is labor-saving, convenient and practical, and the stability of the opening and closing state is good.

3.Advantages of working performance of mud tank subsea valve:

-Good sealing performance, reduce leakage and leakage.

-It is composed of 50 kinds of parts and components precisely.

– Flexible steering and convenient operation.

-Strong practicability, high cost performance, few vulnerable parts, and durable leather.

4. Advantages and characteristics of mud tank submarine valve specifications and dimensions: 6 inches, 8 inches, 10 inches, 12 inches, special bottom flow valve for high-efficiency mud tanks, and submarine valves. This specification of mud tank submarine valve I valve has the conventional requirements of mud tanks and can meet and improve mud tanks. Work efficiency in drilling operations.

December 29, 2021December 29, 2021

Main features of mud mixing tank

According to different design standards, the types of mud mixing tanks can be divided into vertical mud tanks and horizontal mud tanks. According to the conventional model type, it can be divided into solid control system mud tank, skid-mounted vehicle-mounted mud tank, underground tank, and various oil tanks.

No matter what type of trenchless mud mixing tank is used for mud storage, purification, circulation and configuration, the mud mixing tank can also be called a mud storage tank or a mixing tank. Its main features are as follows:

(1) The tank body adopts corrugated board structure, which has the advantages of high strength, beautiful appearance, etc., while reducing the tank body’s own weight;

(2) The solids control equipment has a reasonable layout and reaches the five-level purification standard (coarse screen, degassing, sand removal, mud removal, centrifugation), so that the mud performance can be further stabilized and optimized;

(3) The surface of the tank is made of galvanized steel grating, which is beautiful, light and corrosion resistant;

(4) The tank connection adopts pneumatic tire union and glass steel pipe, which has the advantages of convenient installation, beautiful appearance, and reliable sealing;

(5) The tank has a large capacity, with an effective volume of up to 480m3.

Although there are various types of mud mixing tanks, the selection of suitable mud mixing tanks is determined according to the actual drilling conditions. The trenchless mud mixing tank is to provide drilling mud for horizontal directional drilling. The pump has a strong attractive force, and the flow rate is sufficient, so that the mud is evenly stirred. The general pipelines of all types of mud mixing tank systems are connected by quick connectors and hoses, which are tightly sealed, flexible to disassemble, and have the characteristics of fast and efficient, high degree of automation, and simple structure.

December 29, 2021December 29, 2021

Advantages of piling mud solidification equipment

Large-scale piling mud solidification treatment equipment is used to treat the mud generated in urban piling construction and municipal engineering. This kind of mud has the characteristics of high concentration and high viscosity, so the discharge of the mud is very inconvenient. In order to meet market demand, the piling mud solidification treatment equipment designed and produced by KOSUN can solidify mud in oilfield drilling, trenchless construction, municipal engineering and other fields to achieve harmless mud treatment. It can effectively reduce the treatment cost of mud produced by municipal construction. Convenient operation, convenient maintenance, automatic continuous processing, adjustable loading and unloading capacity, and adjustable various added materials. Save labor cost and high efficiency.

Mud solidification treatment equipment can also be used in oil drilling and trenchless fields to effectively treat oil-based and water-based drilling cuttings. The treated waste is harmless to the environment and can meet the environmental protection requirements of on-site or cultivated land burying. The solidified waste mud has a large volume and is convenient to transport. The liquid drilling waste is easy to store after solidified treatment and is safe and harmless.

According to different working conditions, Mud solidification treatment equipment can adjust different processing volumes and different additives. The application of this set of equipment can help customers save labor costs, improve construction efficiency, facilitate transportation, save transportation costs, ensure the smooth progress of piling projects, avoid environmental pollution caused by the discharge of pile mud, and benefit environmental protection.

November 30, 2021June 25, 2022

Solids control system equipment selected according to the drilling depth

Solids control system equipment selected according to the drilling depth. The choice of equipment for the same well depth in different regions is also different. Generally, we will choose according to the model of the drilling rig, from ZJ20-ZJ90, under normal circumstances, ZJ30 drilling rig only needs 3 levels of solids control equipment, namely: drilling fluid shale shaker, de-sander, and desilter.

Above ZJ30 is a level 5 purification equipment: drilling fluid shale shaker, vacuum degasser, de-sander, desilter, drilling fluid centrifuge. Among them, the mud tank is indispensable as a carrier. The commonly used mud tank specifications are: 95000x2300x2100mm and 125000x2400x2300mm. The number of mud tanks is calculated according to the total volume of the drilling mud, and the appropriate number and size are selected. The amount of circulating mud that needs to be processed is approximately 65% of the total volume of the mud tank. The processing capacity of the solids control equipment at all levels can be selected to meet the circulating mud volume or slightly larger.

The main equipment in the solids control system is the 5-level purification equipment, shale shaker, vacuum deaerator, desander, desilter, centrifuge. The choice of equipment is flexibly selected according to different drilling rigs, and other auxiliary equipment is also indispensable. Desander and desilter must be powered by sand pumps one-to-one. Centrifuges can be supplied by submerged slurry pumps or screw pumps. Where there is a agitator, you must bring a mud gun. The mud gun can flush the dead corners of the tank and start the auxiliary agitator. In addition, the jet mixing device in the solids control system is also indispensable. The jet mixing device can exist as a separate entity, or it can be directly connected to the tail end of the mixing tank and connected by a pipe manifold.

November 27, 2021November 27, 2021

Research on High-efficiency Separation Technology of Shield Dregs

In urban subway construction, the shield method has become one of the main options for tunnel construction. The large amount of waste muck produced by shield tunneling has brought many challenges to the urban environment. The processes of dewatering, transportation, and landfilling of muck will have great adverse effects on the environment.(Separation Technology of Shield Dregs)

As a kind of urban mineral resources, muck will occupy a large amount of land resources for landfill disposal. If the reclaimed muck is used as synchronous grouting material, ecological brick material, roadbed filler, etc., it will effectively enhance the ecological and environmental protection function of subway construction. Carrying out the recovery and treatment of shield dregs, and using shield dregs as an urban mineral resource can greatly reduce the development of natural resources, protect the urban ecological environment, and have significant social, environmental and economic benefits. Shield excavated soil has been used as building materials and garden soil at home and abroad, and certain application results have been achieved.

At present, in the construction of subway shields at home and abroad, there is still a lot of room for the research on the efficient separation technology of shield dregs. The existing mechanical screening technology has relatively high cost. When tunneling in different strata, the particle size distribution of the generated muck is also different, and the use effect is not good. It is urgent to carry out research on the efficient screening technology of shield muck. The moisture content of shield muck soil is as high as 40%, and it is difficult to dehydrate. At present, there are two commonly used dehydration methods in construction: one is mechanical dehydration after adding an industrial agent to the mud; the other is natural drying. The former is costly and the latter is inefficient.

November 27, 2021

The slurry separation system is an indispensable supporting facility in shield construction

The slurry separation system is an indispensable supporting facility in modern shield construction. Shield construction refers to the use of shield tunnel boring machines to excavate tunnels on railways, highways, subways, municipalities, water and electricity and other pipes. With the improvement of shield technology, the selection of equipment and technology of the slurry separation system in shield construction have put forward higher requirements.

The slurry separation system mainly includes a shale shaker, a cyclone screen device and a filter press device, the vibrating screen device and the cyclone screen device are connected, the cyclone screen device and the filter press device are connected, and the connection mode is stacked connection Or connect with conveying equipment. The KOSUN shield slurry separation system can perform different separation treatments according to different particle sizes, make full use of the favorable particles in the excavated soil, improve the self-making capacity of the system, and effectively realize the slurry separation system in the shield tunneling, and the separation latter water is re-injected into the muddy water system for circulation. The equipment can be flexibly adjusted according to different terrain conditions. The convenient construction operation reduces the trouble of the slurry separation system occupying a large area and reduces the pollution of the mud to the environment.

The modern slurry separation system pays more attention to environmental protection in design, and highlights the concept of environmental protection in various aspects such as pulping, slurry mixing, separation equipment selection, and waste discharge. KOSUN’s slurry separation system is built based on the previous construction experience at home and abroad and the high-standard rationalization suggestions put forward by customers. With scientific and technological innovation as the standard, the current situation of low separation level is improved by increasing the configuration standard of the desilting device, so that the separation particle size reaches about 15 microns, which greatly reduces the amount of slurry preparation and reduces engineering costs.

October 27, 2021October 27, 2021

Mud treatment solutions in trenchless construction

In the trenchless construction, a large amount of mud and rock debris are produced. How to deal with the mud? This article will introduce common solutions for mud treatment in trenchless construction. Trenchless construction technology is a kind of underground engineering. Trenchless construction includes tunnels, micro tunnels (MTM), horizontal directional drilling (HDD) and other construction methods, also known as directional drilling, pipe ramming (PR), pipe jacking (PJ), underground drainage, horizontal drilling Boring (Habu) and other methods to install pipes and cables underground with minimal excavation. Large-diameter tunnels, such as tunnel drilling machines (TBM), drilling and blasting technology.

According to different construction methods, choose the appropriate slurry treatment equipment as an excellent slurry treatment solution, including: slurry treatment device (separation device), mud water separation station, mud recovery system, etc.

1. Large-scale tunnel drilling and shield construction (TBM). Due to the large diameter of the shield tunneling machine and the large amount of mud, large-scale slurry separation stations with large processing capacity are generally required. This type of slurry separation station is often through several sets of modularization. The slurry separation system is assembled, and the large-scale slurry separation station is used to treat the shield muddy water, which can process a large amount of 2000-4000 m³/h.

2. For the construction of small tunnels, micro tunnels (MTM), pipe jacking (PJ), etc., as well as the diameter of the pipe jacking machine, a slurry separation system with a processing capacity of 120-250m³/h can be selected.

3. For horizontal directional drilling (HDD construction), horizontal drilling and boring (HAB) construction, it can be matched according to the design of the mud pump processing capacity in the trenchless project or the drag force of the HDD trenchless drilling rig, and the processing capacity is 40- 250m³/h mud recovery system (recycling plant).

The above are three long-term effective non-excavation construction mud treatment programs. The selection of suitable mud treatment equipment for different trenchless projects is a prerequisite for scientific construction.

October 19, 2021October 19, 2021

What is the Trenchless Horizontal Directional Crossing Mud Recovery System?

Horizontal directional drilling crossing is a horizontal directional drilling crossing construction technology used for trenchless construction. Trenchless Horizontal Directional Crossing Mud Recovery System, also known as horizontal directional drilling traversing mud recovery system, or mud purification recovery system, is a set of mud processing equipment specially designed for the drilling characteristics of horizontal directional drilling rigs. The system is mainly composed of a mud shale shaker, a desander and mud removal machine, a jet mixer, a sand pump, a mud storage tank and other equipment. The trenchless mud recovery system can separate the excavated spoil from the liquid mud base fluid to achieve the purpose of mud recovery and reuse. Combining the characteristics of the mud solids control system for oil drilling with the characteristics of trenchless horizontal directional crossing, a variety of mud purification and recovery systems suitable for trenchless horizontal directional crossing construction have been developed.

The Trenchless Horizontal Directional Crossing Mud Recovery System is designed and produced to meet the domestic and foreign trenchless technical requirements. It is used to purify the mud returned from the underground during the horizontal directional traversing process. Separate the large-diameter drill cuttings through solid-phase control equipment such as shale shaker and mud cleaner, add the required mud material through the mixing device, and mix and circulate uniformly to meet the performance requirements of reuse, and pump into the level through the mud pump. The directional drilling system is repeatedly recycled.