Tag Archives: Vacuum Degasser

DCZCQ series Vacuum Degasser is a special-purpose device and a new type one for the treatment of gas in the drilling fluids. It can get rid of various gas of invasive drilling quickly. Vacuum degasser is very important for returning mud gravity, stabilizing mud viscosity and reducing drilling cost.

Vacuum degasser is one important part but not a phase of solids control, it is used to separate the gas and drilling fluids for safe and enviorment friendly. It is always installed after the shale shaker, and before the desander and desilter (or mud cleaner).

degasser equipment

DC Vacuum degasser produced by DC Machinery is suitable for various supporting of drilling mud solids control system, it plays an important role in restoring drilling mud performance, and can also be an agitator with big power.

vacuum degasser

DCZCQ vacuum degasser is a self-contained unit, DC Vacuum Degasser is monitored by level sensor to protect over suction of the fluids. The gas-cut mud is drawn into the degasser by a vacuum created by a regenerative vacuum without needing centrifugal pump. DC degasser can act as a big agitator for the drilling mud, which helps the treatment for desander and desilter.

Vacuum degasser can wipe off the invaded gas from drilling mud quickly, restore drilling mud proportion, keep mud viscosity performance and improve the quality of drilling fluid.

Vacuum degasser according to a preset program runs daily degassing , degassing through two stages.

vacuum degasser

Water phases:

system fluid through the solenoid valve into the degassing tank , all the gas contained in the liquid will be released and the top off the tank through the air release valve and automatic separation system .

degassing equipment

Vacuum stage :

With the inlet valve closed , vacuum stage of the process begins. Vertical multistage pump tank be continuously evacuated , create a negative pressure state , the gas dissolved in the liquid release , and gathered at the top of the tank is discharged through the automatic vent valve , inlet valve is opened again at this time , a new liquid into the tank , those who have no gas , with absorbent liquid is re- injected back into the system involved in circulation, and can absorb gases already in the system , when these fluids re-entering the degasser , those new gas Similarly dissolve is evacuated .

These units vacuum degasser are positioned downstream from mud/gas separators, gumbo removal equipments (if utilized), shale shakers, and mud conditioners (if utilized) while hydrocyclone desanders and decanting centrifuges follow in the arrangement. If you want to learn more about it, please contact me.

Vacuum degasser actually is the 2nd purification equipment for oilfield drilling fluid. It is used to remove little invaded gas in drilling mud. It will be set between shale shaker and mud cleaner/desander. In oilfield drilling fluid system, there are 2 types degasser. One is poor boy degasser separating large quantity invaded gas, the other is the vacuum degasser, we also call it gas buster.

Degasser in oilfield, main function is get rid of invaded harmful or poisonous gas. To prevent blowout keep oilfield job site safety, restore drilling mud proportion, keep mud viscosity performance and improve the quality of drilling fluid. Vacuum degasser produced by DC Machinery has the advantages of compact structure, reasonable design and so on.

vacuum degasser

Operational Theory:

Vacuum degasser utilize negative pressure by vacuum pump to withdraw entrained gases from the mud. In order for this to work, mud is pumped through a venturi, which develops a negative pressure in the vessel by vacuum pump, thus sucking mud into the unit.  The choice between horizontally- or vertically-mounted units is typically based on the footprint requirements of the specific rig.

Features and Advantages of DC Machinery Vacuum Degasser:

1.Scientific reasonable design for structure,it can get effective gas fluids separation,filter out impurities to
guarantee vent pipe always clear.
2.Adopt belt drive,avoid the complication of the reducing gear,ensure the long working time without trouble.
3.Water circle type of vacuum pump is always at a constant temperature,apply to pump the flammable and explosive.
4.High degassing efficiency,up to 95%.
5.There is gas-water separator in vacuum degasser,which can avoid the gas and fluids are all removed together,and also can supply water for vacuum pump,saving water and environment-friendly.

You are welcome to contact with us to get more detailed infos, we will supply cost-effective vacuum degasser and satisfactory pre-sale, sale and after-sale technical services.

Vacuum Degasser is a special-purpose device and a new type one for the treatment of gas in the drilling fluids. It is an very important safety device for whole drilling fluid circulation system, usually it is located in the back of shale shakers.

In order to meet new and old domestic and overseas clients imperative needs. DC Solid control manufactured many sets of different treating capacity vacuum degasser in stock for new year Chinese spring festival holiday.

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Why must use vacuum degasser when drill above 3000m well.

Following the increase of drilling depth, the mud property is increasingly complex and will produce more big bubbles. Vacuum degasser is very important for returning mud gravity, stabilizing mud viscosity and reducing drilling cost. Also, at the same time vacuum degasser can be used as a heavy-power agitator and supported applicable to all types of mud circulation purification system.

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Why more users choose DCZCQ vacuum degasser

Unlike the traditional vacuum degasser, ZCZCQ vacuum degasser is a self-contained unit, DC Vacuum Degasser is monitored by level sensor to protect over suction of the fluids. The gas-cut mud is drawn into the degasser by a vacuum created by a regenerative vacuum without needing centrifugal pump . DC degasser can act as a big agitator for the drilling mud, which helps the treatment for desander and desilter.

Welcome your inquiry of different types and treating capacity vacuum degasser, we have large a mount degassing equipment in stock. You will get superior quality and reasonable price product from DC Solid control.

Vacuum degasser is an important degassing equipment for drilling fluid circulating which is located in the front of shale shakers.

Vacuum degassing apparatus is a used for processing immersion gas drilling fluid of new special equipment, also called negative
pressure deaerator, can quickly remove dip to drilling fluid in various gas, to restore the proportion of mud, stable mud property, a
very important role.

vacuum degasser

The degasser is equipped with water-ring vacuum pump and constant temperature working status, which is suitable for sucking flammable
and combustible gas.

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Features of vacuum degasser:
1. Self-priming device enables it to pump drilling fluids without centrifugal pump.
2. Corrosion is eliminated and cost on repairing as well as maintenance reduced.
3. The design is compact and the footprint is small.
4. It can also work as powerful drilling fluids agitator.

The application of vacuum degasser will not give rise to water and gas discharged at the same time, and the exhaust pipe is always
clear. Can supply water to vacuum pump circularly, and it has the advantages of saving water, environmental protection.

Vacuum degasser is a rugged vacuum unit designed to safely and efficiently remove 99.9% of entrained air and gasses such as methane, H2S and CO2 from drilling fluids. Designed for the rigors of field use, the unit features a 5 hp, 50 or 60 Hz industrial-grade TEXP motor rated for continuous operation.

vacuum degasser

Vacuum degasser utilize negative pressure by vacuum pump to withdraw entrained gases from the mud. In order for this to work, mud is pumped through a venturi, which develops a negative pressure in the vessel by vacuum pump, thus sucking mud into the unit. The choice between horizontally- or vertically-mounted units is typically based on the footprint requirements of the specific rig.

vacuum degassers

Main Features:

Up to 29” Hg performance for viscous fluids
Epoxy coated internal surfaces resist corrosion
Fail-safe overflow valve
Low-maintenance float assembly Easy access to baffles and float switch
Compact design for easy placement
Skid mounted, self-contained unit
Minimum moving parts for reliable operation
4000 lb. dry weight

Vacuum degasser are just a few of the many solids control and waste management offerings that DC Solid Control supplies to the oil and gas industry.

Vacuum Degasser are used to remove the small entrained gas bubbles left in the mud by the mud/gas separator. These units are positioned downstream from mud/gas separators, shale shakers and mud cleaners, while hydrocyclones and centrifuges follow in the arrangement.

Working principle of vacuum degasser

The degassers are used to clean the gas in the drilling fluid, to ensure the drilling fluid property relatively stable, to guarantee the steady operation of swirlers. The degassers can be grouped into two kinds: ordinary pressure type and vacuum type. The ordinary pressure degasser is to use the centrifugal to take out gas to invade the mud, with the help of centrifugal force to make the mud spraying in the jet tanks and striking on the wall to make gas releasing. The vacuum degasser is to use the suction of the centrifugal, forming negative pressure in the vacuum tanks, under the action of drilling fluid at atmospheric pressure, through the suction pipe into the hollow shaft, then by umbrella piece of around the hollow shaft assembly, they jet to the skin of tank.

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Structure of vacuum degasser

ZCQ vertical type vacuum degasser made of explosion proof motor, vacuum pump, coaxial shunting gear reducer. When works, pressuring the start key, motor drive vacuum pump and mud gas separator degassing impeller rotate, gas cut invaded drilling fluid absorbed to mud gas separator and throw to mud gas separator by degassing impeller. Production a fluid lamina which is eddy spiral movement and form the centrifugal force field. Because the centrifugal force is the 32 times of its gravity, make the small bubbles in fluid lamina rapidly buoyancy lift to surface, in the function of negative pressure, the small bubbles rapidly broken, the broken bubbles gas enter into vacuum pump and discharged through the two air holes in reducer.

DC Solid Control is a total solids solutions provider. We offer industry leading solids control equipment including shale shakers, degassers, mud cleaners, deserter, desander and centrifuge. They are a complete circulating of mud systems.

Mud gas separator is a special equipment of gas cut drilling fluid, it belongs to the ordinary pressure, it is the degassing theory of ordinary pressure, but it is the primary degassing equipment of disposed the gas cutting drilling fluid, the main distinguish with vacuum degasser is; it can remove the big bubbles which the diameter is bigger than 3mm. The big bubbles are refers to the swelling gas of the most drilling fluid is full of the well, their diameter are about 3-25mm.  This big bubbles can cause well kick, even erupt the surface of turntable. The gas liquid separator is mainly depend on the effect of gravity collision to realize the liquid and gas separate, the vacuum degasser use the principle of vacuum, flocculated flow and centrifuge, the quality of processing gas of vacuum degasser is less than the liquid gas separator, but it remove the gas more thoroughly. Usually the gas is processed by the liquid gas separator also have small bubbles, after through the shale shaker, it needs enter into the vacuum degasser to conventional gas.

        

The types of liquid gas separator

1 Cover type

The bottom of vacuum degasser is closed, drilling fluid through a U type pipes to return the circulation tank. The depth of drilling fluid in the degassing tank, it can control by the depth of the U type pipes.

2 Open bottom type

The separator have not bottom, the lower parts dive into the drilling fluid, the liquid level in the tank depends on the drive depth of bottom to control, this type of separator is called the “poor children” in foreign, it explains the simplification.

ZYQ Mud Gas Separator Parameters

TYPE ZYQ800 ZYQ1000 ZYQ1200
Separator Main Body 800mm 1000mm 1200mm
Thruput 200~260m3/h 240~300m3/h 280~360m3/h
Inlet Pipe 5″ 5″ 5″
Outlet Pipe 8″ 8″ 10″
Exhaust Pipe 8″ 8″ 8″
Weight 1600kg 2100kg 2800kg
Overall Dimension 1900×1900×5700mm 2000×2000×5860mm 2200×2200×6634mm

The most simple and reasonable liquid gas separator is the cover types. The open bottom types is take second place, because the depth of drilling fluid is limited to the liquid level depth in circulation tank. The working pressure of liquid gas separator is equal to the frictional drag of when the free gas discharge tubes discharge.

Now, abroad strengthen the research of the throughput and the speed of the centrifugal, increase the separation factors of the centrifugal, the most of the material of the centrifugal use the stainless steel, increase the corrosive. in order to increase the throughput of the centrifugal, improve the separation factors, a lot of details are amended and innovated.

The sand removing effect of many domestic centrifugal, because the separation factors is small, the separation of many foreign manufacturing is with in500-1000, it is appropriate for fresh water drilling fluid, overall vibration of the centrifugal is big, there are two main reasons;

1 The solid phase in the drum is not washed, have a part of residual sediment, destroyed the balance.

2 The bearing is abraded, the revolve of the drum is unbalance, the throughput of the centrifugal can’t reach the design requirements, the life time is lower recognition of the manufacture.

From the view of the reaction, we need a kind of centrifugal with large displacement, frequency control and speed regulation, so it can aggravate the drilling fluid and dispose the not aggravate drilling fluid. This kind of centrifugal is called all-around centrifugal, the whole system is frequency control and speed regulation, the rotation of speed can be regulated, the most high speed is above 3000r/min, as a high speed centrifugal , the separation factors F1 can reach 3050, as the mass flow centrifugal, the biggest through put is 100m3/h.

       

DCLW horizontal type helical-conveyer centrifuge is a mechine to separate the soild particles and liquid or separate the liquid and mixture mixed in the liquid by centrifugal force. The main function of centrifuge is to separate the liquid and solid particles in the suspension, or to separate the two kind of different liquid with different density which can not dissolve in each other in the emulsion. And also, can be used to remove the liquid from the mixture of liquid and solid. Some sedimentation centrifuge also can classificate the solid particles in the fluid with different density or granularity by identify the different sedimentation velocities.

DCLW horizontal type helical-conveyer centrifuge is special for theseparation of liquid and solid in oil drilling fluid, can finish the percedure of feeding, centrifuge sedimentation, unloading when it is fully operated. The main function is to recover the barite, clean the small solid, decrease the quantity of solid in the fluid, control the density and viscosity of drilling fluid to guarantee a good performance of the fluid.

The centrifuge is widely used in chemical industry, oil mining, food industry, pharmacy, minerals, coal mining, water treatment and shipping.

LW Centrifuge Parameters

TYPE DCLW450-842N DCLW450-1000N DCLW600-1019N DCLW700-1200N
Drum Diameter mm 450 450 600 700
Drum length mm 842 1000 1019 1200
Drum Rotate Speed r/min 2200 2000 1800 1500
Separation Factor 870 860 850 823
Separation Point μm 5~7
Motor Power(Main) 22kw 30kw 45kw 55kw
Motor Power (Vice) 5.5kw 7.5kw 7.5kw 11kw
Power Of Fluid Supply Pump 5.5KW 5.5KW 7.5kw 11kw
Maxmum Thruput m3/h3/h 40 40 60 90
Weight kg 2800 3000 3600 4300
Size mm 2450×1750×1350 2600×1750×1350 2900×1600×900 3100×1700×950

GLW Centrifuge Parameters

TYPE DCGLW250-980N DCGLW355-1257N DCGLW450X1258N DCGLW600X1200N
Drum Diameter mm 250 355 450 600
Drum Length mm 980 1257 1258 1200
Drum Rotate Speed r/min 3500 3200 3000 2600
Separation Factor 2607 2035 2260 2550
Separation Point μm 2~5
Motor Power (Main) 11kw 37kw 37kw 45kw
Motor Power (Vice) 7.5kw 11kw 11kw
Power Of Fluid Supply Pump 2.2KW 5.5KW 7.5kw 11kw
Maxmum Thruput m3/h3/h 20 35 45 90
Weight kg 1000 2950 3100 4300
SIZE mm 1900×1200 ×800 2900×1850×1400 2900×1900×1450 3200×1600×900

Note:DCGLW centrifuge can be made with power frequency or frequency conversion according to the requirement of the customers.

DC shaler shaker is a new style shale shaker produced by our company, it is the first-level process equipment in the mud cleaning system, to separate the drilling cuttings from the drilling fluid. The shale shaker can be useds exclusively or combined with other machines.

The shale shaker is the most important equipment in the drilling fluid solid control system,  Not only using in deep well, but also using the shallow well, the mud must through the shale shaker to filter.

     

So the importance part is the screen, the size of the mesh influence the purification degree of the mud, the more of the mesh, the solid phase particles to be got rid of will be increase, the less of the mesh, the solid phase particles to be got rid of is decreased. So the screen is easy to abrade.

The motor is other importance part of the shale shaker, the motor drive the exciter to rotate to produce the inertial force of periodic change, get rid of the different size of solid phase particles.

The major factors are throughput and the separation size, now the biaxial liner shale shaker is widely used in the drilling fluid mud cleaning system. There are two equal power motor to work together, make the mud do liner motion, it can increase the throughput of the shale shaker, and extended the service life.

Shale Shaker Parameters

TYPE DCS585-3/4 DCS630-3 DCS700-3/4 DCS830-2/3
Shake Locus linear type or ellipse type
Motor Power 2×1.5/1.72KW 2×1.5KW 2×1.5/1.72KW 2×1.3/1.72KW
Shake Strength ≤7.0G
Amplitude 5~6mm
Thruput Per Screen 100/130 m3/h 440/572GPM 120 m3/h 528GPM 110/130 m3/h 440/572GPM 80/130 m3/h 352/528GPM
Angle Of Screen -1°~5°
Motor frequency and voltage 380V/50HZ(Foreign custom motor according to customer requirements)
Screen Area 2/2.73 m2 2.36m2 2.2/2.94m2 1.8/2.7m2
Screen Specification 585×1165mm (40~250) 630×1250mm (40~250) 700×1050mm (40~250) 830×1080mm (40~250)

Tangshan Dachuan Mechanical Equipment Co., Ltd. is a company focuses on the production, sales and after-sales maintenance service of solid control equipment of mud cleaning equipment. We are concentrated on matching the requirements of our customers. Our management principle is to supply a high quality, rapid, honest, considerate service to our customers. DC shale have a lot of advantages. Such as;

1 The motor of the shale shaker use the vibration motor of import in Italy, the excite of vibration motor can adjust.

2 The screening area of the screen is big, the throughput is large, the effect of the treatment is good.

3 the shale shaker designed with the solidwordks ansys, the structure is optimization, the structure of the shale shaker is simple, compact, the performance is excellent and cost-effective

4 the screen of the shale shaker is the agglutinate screen edge rigidity, use the plate type close fixed, is convenient and quick to replace.

5 the design is reasonable, make the mud buffer, average flow, reduce the directly impact, the life of the screen is long.

6 The shale shaker use the ratchet wheel lift, the structure of lift is easy and easy to operate.