Jan 12

GN solids control provides the engineering and design of 3-phase separator internals that target high gas volumes and primary L/L dispersions.

Our scope includes the design, engineering and delivery of


  1. a) The inlet gas distributor
  2. b) The foam breaker along with the the L/G separator
  3. c) The dimensional design of the inlet compartmeent, the settling compartment and

the product outlet compartment

  1. d) The separation of the aqueous and hydrocarbon liquid phases utilizing ether plate pack type or wire mesh coalescers Ensepatec provides a process guarantee for


1) The removal efficiency of liquid droplets in the gas stream and the maximum liquid content in the outlet gas stream

2) The maximum content of water in the oil phase

3) The maximum ppm-level of oil in the water outlet flow


Materials of constructions are high grade stainless steel or nickel-based alloys


 This design eliminates the need for a liquid interface controller. Both the oil and water flow over weirs where level control is accomplished by a simple displacer float. The oil overflows the oil weir into an oil bucket where its level is controlled by a level controller that  operates the oil dump valve. The water flows under the oil bucket and then over a water weir. The level downstream of this weir is controlled by a level controller that operates the water dump valve.

The height of the oil weir controls the liquid level in the vessel. The difference in height of the oil and water weirs controls the thickness of the oil pad due to specific gravity differences. It is critical to the operation of the vessel that the water weir height be sufficiently below the oil weir height so that the oil pad thickness provides sufficient oil retention time. If

the water weir is too low and the difference in specific gravity is not as great as anticipated, then the oil pad could grow in thickness to a point where oil will be swept under the oil box and out the water outlet. Normally, either the oil or the water weir is made adjustable so that changes in oil/water specific gravities or flow rates can be accommodated.

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Jan 04

As the main part of solids control system,Decanter centrifuge is one of GN’s most important protect
There is some point user should mention when installing and using:
1. The liquid discharge port should use soft tube when transfer, to avoid effect centrifuge’s balance when running
2. Hydrodynamic coupling will be installing in fixed speed centrifuge,for spped raise slow and working current not over limited,,this unit can prolong centrifuge’s service life
3. Limited system for centrifuge is important when equipment running,like electriclty limited,when the screw blocking by treated material,the momentary current will be very high,limited system will find it and cut power at first time to protect machine,GN’s centrifuge make overall protect design to keep solids control work running well and equipment life longer
4. Keep watching the state of equipment is very useful,the whole centrifuge will start shake when blocking,install detector to the control system will help user make first time decision to solve problem
5. Temperature of equipment was indicate when working,for example about bearing,the temperature will be very high when oil shortage,it will broken if do not have action,the motor’s temperature will be very high when screw sucking by material
6. Schedule regular time to get active, and stick with it,and do regular maintenance can keep quipment at best state and service longer,tosave money for buying new one,for example,the tiles of screw should be fixed after long time using,or the droped part will damage whole screw
7. Most point of using centrifuge is keep bowl running balance,or it will damage very fast,so,check and test balance is necessary after fix or maintencance

Keep checking the equipment is never wrong to make separate well and service longer
More detail,please contact GN solids control

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Dec 29

GN solids control focus on separation

During the production of oil and gas, water is the most part volume waste stream. Produced liquid may contain dispersed and dissolved hydrocarbons, dissolved organics and dissolved inorganic compounds. In addition, it may also contain a significant amount of suspended solids of different origins (formation, precipitation, corrosion, etc.) and thus, different in nature (sand, clay, carbonates, sulphates, other.).

Before water can be reuse, it must be treated to remove some of the contaminants listed above. Typically, this produced water has been separated from the production stream in multistage separation drums.

If the produced water is to be discharged, dispersed hydrocarbons must be reduced to comply with the environmental regulations of the region. Currently, dispersed oil has been separated by gravitational processes ranging from settling and flotation to deoiling hydrocyclones, and in extreme cases centrifugation.

If the pretreated water is to be discharged into disposal wells or re-injected into the formation, suspended solids need to be reduced to prevent potential blockage of the receiving medium. In this case, oil is removed from the process stream by one or more of the methods mentioned above followed by a desanding step. This desanding has been accomplished with filtration in the past and desanding hydrocyclones more recently. In special cases, solids and oil have been removed in a single step and by deep bed filtration or liquid/solids separate centrifuges. Recently, cross flow membrane filtration has been try ,and get success to solve problem

The gravity settling section normally takes up the main part space in the separator.the size depends upon the physical properties of the fluids being separated, the volume of these fluids, the residence time required to achieve gravity settling, and if or not there are separator internals to assist the gravity separation.

More detail,please contact GN solids control

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Dec 21

TDU is mainly for hard treatment material,and normally as the last step of whole waste management system

When decided way to treat/manage waste like sludge or slurry,need check contect of material to design economic/fast solution

For example of this material contect:

  • 59% Moisture
  • 30% Solids
  • 11% Oil
  • Total Monthly Volume 1500 MT
  • 24hr Operation

The liquid content is 59%+11%=70%,percentage is very high,it will waste a lot energy if feed to TDU directly,because TDU’s ability is face to liquid part of material and request high energy cost,if have low cost pretreatment way to reduce mainly liquid part of material,the TDU will focus energy to treat hard removable part of liquid,to raise speed and save cost

GN oil sludge treatment system can collect most part of material,and the cost is not high like TDU,we can use it as pretreatment way for TDU to raise treatment speed and save cost

Also the TDU’s capacity is not big normally,like 3.5-5ton/hour,when material quantity is very high,for raise speed of whole treatment progress,pretreatment will be very important to reduce material quantity,and let TDU treat important liquid part,to reach best efficiency


Some pretreatment was will design based on waste management unit, based on different request and quantity


For more question,please contact GN solids control

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Dec 14

With mud system for tunnel boring,GN solids control will give best solution

About the way will be called shield for soft soil layer will be used for rock formation called the TBM Slurry Treatment plant.Shield is generally separated into hand-leg-shield, TBM Slurry Treatment plant squeeze Shield, Shield semi-mechanical (partial pressure, global atmospheric pressure), mechanical shield (thoracotomy cutting shield, according to the working principle of mud pressure shield, pneumatic shield ,mixed shield, EPB shield,  shaped shield).

With shield TBM slurry system construction machine,when with a high degree of automation, to save manpower, construction speed, into the climate,a hole,  and excavation of ground subsidence TBM sludge and slurry separate system can control to reduce the impact of buildings on the ground and the excavation under water, It doesn’t affect the water transport characteristics, long tunnel hole in the line, depth at large, with the shield machine construction more economical and reasonable.

For basic principle of shield machine,it’s a cylinder of steel components along the tunnel axis side forward side of the soil excavation. That component of the cylinder housing shield, TBM MUD separation plant plays a role in temporary support has been excavated tunnel lining segments with stand the pressure of the surrounding soil, TBM slurry treatment System groundwater and sometimes subjected to pressure and will stand in the groundwater outside. Mining, dump, Tunnel boring mud system lining and other operations carried out under cover of the shield.

With more detail about solids control system and sludge treatment,please view at GN solids control

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Dec 11

In soft ground with very high water pressure or where ground conditions are granular (sands and gravels) so much so that a plug could not be formed in the Archimedes screw, Slurry Shield TBMs are needed. The cutterhead is filled with pressurised slurry which applies hydrostatic pressure to the excavation face. The slurry also acts as a transport medium by mixing with the excavated material before being pumped out of the cutterhead back to a slurry separation plant, usually outside of the tunnel. Slurry separation plants are multi-stage filtration systems, which remove particles of spoil from the slurry so that it may be reused in the construction process. The limit to which slurry can be ‘cleaned’ depends on the particle size of the excavated material. For this reason, slurry TBMs are not suitable for silts and clays as the particle sizes of the spoil are less than that of the bentonite clay from which the slurry is made. In this case, the slurry is separated into water, which can be recycled and a clay cake, which may be polluted, is pressed from the water.

Open face TBMs in soft ground rely on the fact that the face of the ground being excavated will stand up with no support for a short period of time. This makes them suitable for use in rock types with a strength of up to 10MPa or so, and with low water inflows. Face sizes in excess of 10 metres can be excavated in this manner. The face is excavated using a backactor arm or cutter head to within 150mm of the edge of the shield. The shield is jacked forwards and cutters on the front of the shield cut the remaining ground to the same circular shape. Ground support is provided by use of precast concrete, or occasionally SGI (Spheroidal Graphite Iron), segments that are bolted or supported until a full ring of support has been erected. A final segment, called the key, is wedge-shaped, and expands the ring until it is tight against the circular cut of the ground left behind by cutters on the TBM shield. Many variations of this type of TBM exist.


While the use of TBMs relieves the need for large numbers of workers at high pressures, a caisson system is sometimes formed at the cutting head for slurry shield TBMs. Workers entering this space for inspection, maintenance and repair need to be medically cleared as “fit to dive” and trained in the operation of the locks.

With more interested about mud management,please check at GN solids control

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Dec 01

Solidification unit is an regular wat to treat material,GN solids control supply relate equipment

Solidification is an appropriate treatment method for highly concentrated, or difficult to treat waste stream which do not respond well to conventional wastewater treatment methods. Transport and off-site treatment of liquid waste can add up to high disposal costs. Solidification provides a cost benefit by converting liquid hazardous waste into solid, often non-hazardous waste material. Solidified material can be transported off-site as a solid waste.

The solidification process requires pre-selected solidification chemistry be added to the waste. The chemistry is mixed into the waste and within minutes the material is converted into a solid by stabilization of all free liquids.

The solidification process operates as a continuous flow treatment. Liquid waste material is pumped to the solidification unit. A chemical feed system introduces the solidification agent into the liquid waste at the required dosage rate. The liquid waste and solidification chemistry are thoroughly mixed. A steady flow of solidified material is deposited into a roll off bin for offsite disposal.

Each waste type/stabilization process combination can be further categorized according to one of several treatment levels based on regulatory regimes/disposal scenarios that are applicable now or might be in the near future. The three categories are:

Treatment Level A: Treatment to present commercial mixed waste disposal facility requirements. Since there is only one such facility presently operating in the Envirocare of Utah – the requirements for disposal at that facility are used in this document. These requirements comply with present RCRA LDRs and with NRC’s Class A LLW minimum requirements.

Treatment Level B: Treatment to typical RCRA requirements (present or future) that might be applied to mixed waste disposal facilities at some time in the future, based on proposed or pending regulations, as well as developments in the RCRA Corrective Action and CERCLA areas. This includes more stringent metals leaching levels, and higher strength specifications.

Treatment Level C: Treatment to NRC requirements or recommendations for low-level radioactive waste solidification waste form stability requirements (Classes B and C LLW) for cement and noncement waste forms. More stringent ANS 16.1 leachability standards may be required at specific site, for example, Westinghouse Savannah River Company.

The reasoning behind this further sort of classification is that all of these processes have been developed with some set of criteria in mind, but not the same set for all processes. For example, the PAT, SP, and PE processes were designed to produce moderate to high strength monoliths that would meet NRC requirements, while most Grout processes produces low to moderate strength waste forms that may be either granular and soil-like to meet the Envirocare Waste Acceptance Criteria (WAC) (Class A LLW), or monolithic to meet NRC Classes B and C LLW cement waste form requirements.

GN solids control supply solidification unit,more detail please check our website

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Nov 24

GN focus on drilling waste management

Oil and gas producers face a significant problem with managing the waste generated in the drilling process.  A single well can produce up to 1,200 tons of waste.  This waste is comprised of drilling mud, which is injected into the well to lubricate and cool the drill head, and drill cuttings – the broken bits of rock and soil cut away in the drilling process and circulated up to the surface by the mud.


The oil content of this waste ranges from 10-30%, representing a significant cost if not recovered.  Furthermore, disposal of drilling waste is receiving intensifying scrutiny from regulators and environmental agencies.  Historically buried or landfilled, the high oil content in drilling waste has been proven detrimental to the environment

Self-Lifting Mud Recycling System

Self-Lifting Mud Recycling System

Before the introduction of mechanical solids-removal equipment, dilution was used to control solids content in the drilling fluid. The typical dilution procedure calls for dumping a portion of the active drilling-fluid volume to a waste pit and then diluting the solids concentration in the remaining fluid by adding the appropriate base fluid, such as water or synthetic oil.


Using solids-control equipment to minimize dilution has been a standard practice for the drilling industry for more than 60 years. Equipment and methods have changed over that time, but the fundamentals behind the process have not:


Solids concentration matters—increasing solids content is detrimental to fluid performance.

Economics matter—mechanical removal of solids costs less than dilution.

Volume matters—the volume of waste generated is indicative of performance.

Size matters—fine solids are the most detrimental and difficult to remove.

Stokes’ law matters—viscosity and density affect gravity separations.

Shaker-screen selection matters—shaker screens make the only separation based on size.

Footprint matters—the space available for equipment on rigs always is limited.


Increasing solids concentration in drilling fluid is a problem for the operator, the drilling contractor, and the fluids provider. It is well established that increasing solids content in a drilling fluid leads to a lower rate of penetration (ROP). Other problems that are related to excessive solids concentration include:


High viscosity and gel strengths.

High torque and drag.

Lost circulation caused by higher equivalent circulating density (ECD).

Less efficient drilling hydraulics.

Abrasion and wear on pump fluid ends.

Production loss caused by formation damage from filtrate or solids invasion.

Stuck pipe caused by filtrate loss.

Poor cement jobs caused by excessive filter cakes.

Generation of excessive drilling waste.

Higher drilling-fluid maintenance costs.

GN provide Solid control equipment and package solution for Drilling waste management

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Nov 10

As solids control equipment producer,GN’s product use for HDD a lot

Trenchless technology is a type of subsurface construction work that requires few trenches or no continuous trenches. Solids control as main part of it,as equipment to give support ,It is a rapidly growing sector of the construction and civil engineering industry. It can be defined as “a family of methods, materials, and equipment capable of being used for the installation of new or replacement or rehabilitation of existing underground infrastructure with minimal disruption to surface traffic, business, and other activities

GN500 GPM mud recycling system for HDD

GN500 GPM mud recycling system for HDD

Trenchless construction includes such construction methods as tunneling, microtunneling (MTM), horizontal directional drilling (HDD) also known as directional boring, pipe ramming (PR), pipe jacking (PJ), moling, horizontal auger boring (HAB) and other methods for the installation of pipelines and cables below the ground with minimal excavation. Large diameter tunnels such as those constructed by a tunnel boring machine (TBM), and drilling and blasting techniques are larger versions of subsurface construction. The difference between trenchless and other subsurface construction techniques depends upon the size of the passage under construction.

The method requires considering soil characteristics and the loads applied to the surface. In cases where the soil is sandy, the water table is at shallow depth, or heavy loads like that of urban traffic are expected, the depth of excavation has to be such that the pressure of the load on the surface does not affect the bore, otherwise there is danger of surface caving in.

Trenchless rehabilitation includes such construction methods as sliplining, thermoformed pipe, pipe bursting, shotcrete, gunite, cured-in-place pipe (CIPP), grout-in-place pipe, mechanical spot repair, and other methods for the repair, rehabilitation, or replacement of existing buried pipes and structures without excavation, or at least with minimal excavation. Mechanical spot repair is applied where damaged pipelines require the re-instatement of structural integrity. Sliplining, CIPP, and thermoformed pipe lining involve pulling or inverting a new liner into an existing pipe, then applying heat and/or pressure to force the liner to expand to fill the pipe. CIPP technologies combine a carrier (felt or fibreglass) impregnated with heat, ultraviolet light, or ambient curable resin to form a “pipe within a pipe”. Pipe bursting fractures a pipe from the inside and forces the fragments outwards while a new pipe is drawn in to replace the old.[2] The other methods are primarily for fixing spot leaks. Trenchless rehabilitation methods are generally more cost-effective than traditional exhume (dig) and replace methods.

With trenchless technology was used in all over the world,GN solids control can give more equipment and solution support

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Nov 03

G force acceptability is important for shale shaker,GN engineer use heat treating to make it higher,up to 8.0G

Heat treating (or heat treatment) is a group of industrial and metalworking processes used to alter the physical, and sometimes chemical, properties of a material. The most common application is metallurgical. Heat treatments are also used in the manufacture of many other materials, such as glass. Heat treatment involves the use of heating or chilling, normally to extreme temperatures, to achieve a desired result such as hardening or softening of a material. Heat treatment techniques include annealing, case hardening, precipitation strengthening, tempering, normalizing and quenching. It is noteworthy that while the term heat treatment applies only to processes where the heating and cooling are done for the specific purpose of altering properties intentionally, heating and cooling often occur incidentally during other manufacturing processes such as hot forming or welding.

The purpose of heat treating carbon steel is to change the mechanical properties of steel, usually ductility, hardness, yield strength, or impact resistance. Note that the electrical and thermal conductivity are only slightly altered. As with most strengthening techniques for steel, Young’s modulus (elasticity) is unaffected. All treatments of steel trade ductility for increased strength and vice versa. Iron has a higher solubility for carbon in the austenite phase; therefore all heat treatments, except spheroidizing and process annealing, start by heating the steel to a temperature at which the austenitic phase can exist. The steel is then quenched (heat drawn out) at a moderate to low rate allowing carbon to diffuse out of the austenite forming iron-carbide (cementite) to precipitate leaving ferrite, or at a high rate, trapping the carbon within the iron thus forming martensite. The rate at which the steel is cooled through the eutectoid temperature (about 727°C) affects the rate at which carbon diffuses out of austenite and forms cementite. Generally speaking, cooling swiftly will leave iron carbide finely dispersed and produce a fine grained pearlite and cooling slowly will give a coarser pearlite. Cooling a hypoeutectoid steel (less than 0.77 wt% C) results in a lamellar-pearlitic structure of iron carbide layers with α-ferrite (nearly pure iron) between. If it is hypereutectoid steel (more than 0.77 wt% C) then the structure is full pearlite with small grains (larger than the pearlite lamella) of cementite formed on the grain boundaries. A eutectoid steel (0.77% carbon) will have a pearlite structure throughout the grains with no cementite at the boundaries. The relative amounts of constituents are found using the lever rule.

Higher G force acceptability means Service life of shaker is longer,same time means maintenance less for final user,can save time and repurchase cost.

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