Category Archives: Vacuum Degasser

ZCQ/3 vertical type vacuum degasser used to remove the bubbles whose diameter less than 10mm. It uses level centrifugal force field and negative pressure dual function action principle to eliminate it, the throughput is 180m3/h, the degassing efficiency is 95%-99%, it can effectively remove the gas invaded in drilling fluid, avoid the well kick, blowout and blindness aggravate drilling fluid evocable well leakage accidents.

Structure of vacuum degasser 

ZCQ/3 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.

Vacuum Degasser Parameters

Model ZCQ240 ZCQ270 ZCQ300 ZCQ360
Main Diameter 700mm 800mm 900mm 1000mm
Treating Capacity ≤240 m3/h ≤270 m3/h ≤300 m3/h ≤360 m3/h
Vacuum -0.030~-0.045MPa -0.030~-0.050MPa -0.030~-0.055MPa -0.040~-0.065MPa
Ratio 1.68 1.68 1.68 1.72
Efficiency ≥95%
Motor Power 15kw 22kw 30kw 37kw
Vacuum Power 2.2kw 3kw 4kw 7.5kw
Dimension 1750×860×1500 2000×1000×1670 2250×1330×1650 2400×1500×1850
Weight 1150kg 1450kg 1800kg 2100kg

Characteristics 

The volume is small, light weight, structure impact and simple. The design of vacuum degasser use electromotor, vacuum pump, reducer, degassing long impellers and pump impellers equipped in the same shaft in series, and the reducer is coaxial shunt type drive structure, make input axis and output shaft in the same axis, offset the lateral thrust, the lengthways structure size can be shorten.

Installation, operation and maintenance is convenient.

Power is small, degassing efficiency is high, treating capacity is big. The degasser treating capacity is 180m3/h, can dispose the drilling fluid of drilling pump double pumpage at the same times, the treating capacity follows the liquid height to automatic control , when use needn’t do any adjustment.

Barrier- free long working hour, can be as the agitator agitate drilling fluid, also can replace centrifugal pump

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 produced by DC Machinery has the advantages of compact structure, reasonable design and so on.

Function of vacuum degasser 

Treatment gas invaded drilling fluid, wipe off the bubbles in drilling fluid, recover gas invaded density.

The difference of vacuum degasser and mud gas separator

The main function of mud gas separator is eliminating the big bubbles in drilling fluid which refers the expansion gas in well eye annular air, the diameter is about 3-25. The fluid can directly enter into mud gas separator from rotating blowout preventer, also can enter into fluid from throttle manifold place, separate out the big bubbles. The treatment drilling fluids still have small bubbles, after through shale shaker enter into vacuum degasser to treat.

Vacuum degasser is used to eliminating the small bubble sin drilling fluid, main used to wipe off the bubbles whose diameter is smaller than 1mm.

Consist of vacuum degasser 

Vacuum tank.  Three ventilation control valve system.  Ejector system.  Water circulating type vacuum pump.  Water box.  And Foundation

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. 

Checking routine every day

Checking the connection condition of vacuum pipe

Check gas outlet pipe and the connection.

Checking mud outlet pipe whether unimpeded, discharged pipe outlet must be submerged below mud surface.

Check oil pool liquid level.

Check gas discharge value.

Starting degassing 

Check all electrical equipment connection.

Starting degasser

Degasser must gradually enter into normal working condition. check mud discharge pipeline.

Stop degasser

Stop the vacuum degasser

Open the washing value, washing separation impeller 5 minutes.

Check and maintenance of ever week 

A Speed changing box

Check speed changing oil pool every day, on occasion add Dexron III transmission fluid.

B Top washing device.

We must washing vacuum degasser every week, washing out the mud which dry and hard the vacuum chamber. Make the sufficient number of seawater wash the impeller of upper gas cell.

C Other maintenance

Gear case oil, work with 1000 hours should replace lubrication and cleaning or replace filter assembly. The model of lubrication is Dexron III fluid frivr , oil volume is 2 gallon and the liquid level is 25/64 on galss porthole.

Day time maintenance

Check the inner surface of wear- resisting rubber cone bush.

Check inlet pressure whether meet the demand, ensure small hole is cleaning and give it fair adjustment.

Lubricate the packing of desander pump and desiltr pump.

Three months maintenance

Add the butter to coupling.

Two years maintenance or using 15000 hours maintenance

Check pump impeller, pump case and sail upstream, discharge water valve, when need should replace impeller, pump case or value

Check the bearing and sealing element, when needed should replace.

Check hydrocyclone cone bush and each component, when needed should be replaced.

 

There are mainly have two reasons why vacuum degasser use vacuum pump, the one is, the degassing mud in degasser absorb to the top of the degasser, make if form into thin layer flow on baffle, vertebral body or between hopper;The second one is the gas discharged in tank and intake air is all discharged. Vacuum pump also can produce a kind of pressure which can discharge the exhaust gas through a pipeline.

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.

The Spirovent Superior is a fully automatic vacuum degasser for heating, cooling and process installations. This device temporarily subjects part of the installation fluid to low pressure or vacuum. As a result, the air dissolved in the fluid is released and removed from the system. Thanks to the electronic, independent control system, reading system information is a breeze.

Vacuum degasser use atmosphere and vacuum degassing theory eliminate the remaining gas in drilling fluid. Vacuum degasser tank is installed a group of wave blade and many mud inlet make flow is uniform distribution and form into turbulence in tank.

The throughput of vacuum degasser is 500g/m, 1200 type is 1200g/m, this is because the different area of wave blade. The blade area of vacuum degasser is 500 times of 500 type which is in order to ensure effective eliminate the remaining gas.

The vacuum tank produce low pressure in tank, the bubbles in the mud can well discharge. According the change of overload, vacuum pump proof motor can be adjusted. The mud liquid level in bottom tank feedback to a group of mechanical transmission device in order to automatic control inlet displacement and vacuum tank liquid level. Jet pump sucks out degassing mud from vacuum degasser tank.

Design characteristic

Drilling fluid enter into vacuum degasser from the inlet pipeline of tank wall. After gas is discharged from mud, flow to the bottom of vacuum tank. Degasser use vacuum and molecular collision / turbulence theory and maximize the surface area of drilling fluid to eliminate the gas.

Low pressure — the low pressure in vacuum tank make the bubble in mud is nature swell. It is more easy float to the surface of mud after bubbles is large and escaping mud.

Collision/ turbulence – the mud flow to the centre of tank and spray out from the ostioles which are in the wall of the tank. The liquid has enough force to impact the blade and tank wall. The result is the remaining gas is more easy escape to vacuum environment. The probability is big of blade is cracked.

Contacting area is maximum — in the process of mud splash to the tank from the odtioles in vertical pipe, the mud through a group of wave plate fine and thin blade make mud is disperse to increase the contacting area of the mud and vacuum environment. The residual gas is more easy to discharge.

Operation theory of vacuum degasser

Drilling fluid is transported to mud inlet from mud tank. Mud through degasser vacuum is bout 29inch of mercury is absorbed to vertical pipe. The mud splashes to wave blade and tank wall from the spray mouth of vertical pipe, the gas evolution this time and expose in the low pressure environment which is extracted by out tank vacuum pump.

The degassing mud ceaseless flow to bottom mud pit from blade group. Centrifugal pump is unceasing extract degassing mud by ejector.

DC Solids control manufacturer combines the advanced technology at home and abroad to design the high quality vacuum degasser. You can be assured that our products are of the quality you expert.

The common basic theory processing gas cut

Gravity separation

Gravity separation is decided by the difference of density, the height of liquid column, the size of bubbles and the flow resistance in fluid. The simple drilling fluid tank or fracturing tank is a gravity separator, it can store fluid, solid phase and gas until they are natural separation. The gas rise and escape from the top of the tank, the oil is separation in other fluid and floating to the top of fluid. When oil over overflow mouth or built-in baffle of the tank is siphoned off, drilling fluid and other fluid are eliminated from the bottom tank. Gravity separation is the main method of used in oil-water separation than and seal type confined separator.

Centrifugal separation

Drilling fluid is sent to the circular container with tangential or cylinder container. Oil, gas, water and solid phase particles produce the artificial gravity by the centrifugal force of a rotating fluid. The method is used in many open or West Texal separator, but the involute spiral is widely used in seal type bearing system, it produces gravity separation.

Impacting, baffling, spray separation

Impacting, baffling, spray separation make drilling fluid impact the baffle with high speed, the separation the gas. It can directly separate the drilling fluid which is discharging from overflow pipe and chip removal pipe, it can separate after using pump increase the drilling fluid flow speed.

Parallel-plate and membrane separation

Parallel-plate and membrane separation is aim at the gas of drilling fluid. Drilling fluid is tile expansion on parallel plate, make gas is easy to escape. In parallel separator, the drilling fluid has gas is forced between the two parallel plate, male bubbles distortion, the thin film processing is used in most vacuum degassing device. 

Vacuum separation

Vacuum degassing device is using separate the drilling fluid mixed gas, it using decrease pressure to urge bubbles swell and fracture. The method is used in degassing device to eliminate the drilling fluid mixed gas.

Vacuum degasser is a special equipment to deal with gas drilling fluid, which is applied to the mating of the other drilling equipment to eliminate the harmful gas of the fluid, to recover the specific gravity and stabilize the viscosity of the fluid. The vacuum degasser is an important part of drilling mud cleaning system.

Function

According coercive measures make the gas is separated from gas cut drilling fluid, ensure the performance of mud is good. So the drilling fluid mud purification system is widely used.

Working theory

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.

ZCQ Vacuum Degasser Parameters

TYPE ZCQ240 ZCQ270 ZCQ300 ZCQ360
Main Tank Diameter 700mm 800mm 900mm 1000mm
Thurput ≤240 m3/h ≤270 m3/h ≤300 m3/h ≤360 m3/h
Vaccum Degree -0.030~-0.045MPa -0.030~-0.050MPa -0.030~-0.055MPa -0.040~-0.065MPa
Drive Ratio Vacuum Degree 1.68 1.68 1.68 1.72
Degassing Efficiency ≥95%
Host Motor Power 15kW 22kW 30kW 37kW
Vacuum Pump Power 2.2kW 3kW 4kW 7.5kW
Overall Dimension 1750×860×1500 2000×1000×1670 2250×1330×1650 2400×1500×1850
Weight 1150kg 1450kg 1800kg 2100kg

Installation and use

It is must be installed before drilling

The installation should be steady, connection, tension and reasonable.

The filter screen should be installed in the air inlet place of exhaust pipe, preventing particles enter into vacuum degasser.

Checking before start

The rotation of motor, vacuum pump and the main motor should be unanimous with mark direction.

The end of discharge pipe and inlet pipe should be immersed in mud pool at the same time.

Turn the coupling number ring to ensure it is didn’t locked or damage phenomenon.

After use

After use we must discharge the water in the pump or gas water separator.

It is must be tested run every week.

Before enter into gas layer, it is must be normally operated.

 

DC poor boy vacuum degasser is a self-contained unit, The gas-cut mud is drawn into the degasser by a vacuum created by a regenerative vacuum without needing centrifugal pump.Moreover, DC poor boy degasser can act as a big agitator for the drilling mud.

DC poor boy 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.

Benefits

Small footprint, save much space
Get better effect, decrease general cost
Make installation and handling more convenient
Mix drilling mud evenly, break the bubble
Enable installation in confined spaces due to small footprint
More convenient, save cost and tank space

ZCQ Vacuum Degasser Parameters

TYPE ZCQ240 ZCQ270 ZCQ300 ZCQ360
Main Tank Diameter 700mm 800mm 900mm 1000mm
Thurput ≤240 m3/h ≤270 m3/h ≤300 m3/h ≤360 m3/h
Vaccum Degree -0.030~-0.045MPa -0.030~-0.050MPa -0.030~-0.055MPa -0.040~-0.065MPa
Drive Ratio Vacuum Degree 1.68 1.68 1.68 1.72
Degassing Efficiency ≥95%
Host Motor Power 15kW 22kW 30kW 37kW
Vacuum Pump Power 2.2kW 3kW 4kW 7.5kW
Overall Dimension 1750×860×1500 2000×1000×1670 2250×1330×1650 2400×1500×1850
Weight 1150kg 1450kg 1800kg 2100kg

DC poor boy vacuum degasser is vertical type. It’s compact, fresh style, Actually, vacuum degasser always set behind shale shaker. The internal impellers will mix the drilling fluid and break the bubble. Poor boy vacuum degasser will keep drilling fluid density, viscosity and weight. Get rid of small part of harmful invaded gas, such as H2S.

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.

ZCQ vacuum degasser is a special equipment to deal with gas drilling fluid, which is applied to the mating of the other drilling equipment to eliminate the harmful gas of the fluid, to recover the specific gravity and stabilize the viscosity of the fluid.  ZCQ series Vacuum Degasser is a special-purpose device and a new type one for the treatment of gas in the drilling fluids. 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。

The function

The ZCQ Series Vacuum Degasser can quickly remove all kinds of entrained gas from the fluids. It is an indispensable equipment in gas wells, prospect wells and deep wells. It is also used with various kinds of clean circulating systems for drilling. The gas-fluids separation structure of the HV Series degasser is well designed, ensures efficient separation and proper filtering. A water ring vacuum style degasser is used for degassing combustible gas and explosive gas. Do contact us for further sales enquiries.

The ZCQ vacuum degasser has performed reliably on hundreds of thousands of wells and has earned its reputation as the standard of the industry, 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 environment friendly. It is always installed after the shale shaker, and before the desander and desilter

Features & Benefits

       ·Skid-Mounted – Simplifies spotting and installation.

       ·Self-Contained – The unit consists of a cylindrical vacuum tank with internal baffle system, vacuum      pump, jet nozzle and three-way float valve.

       ·Three-Way Float Valve – Unique design allows venting to the flare line during hydrogen sulfide service.

       ·High Performance – The D-GASSER can handle up to 1,000 gpm while restoring mud to its original  density.

       ·Robust - The unit is ruggedly built and is coated inside and out with a corrosion-resistant epoxy to ensure long life and minimum maintenance.

 DC solid control is a professional manufacturer of solid control system/equipment in china. We will provide our clients high quality products with most reasonable price, at the same time we also sincerely offer the high level after sales service for any home or abroad clients.

You are welcomed to consult or visit us any time.

 

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.

the picture of factory

Vaccum Degasser  is 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, gumbo removal equipments (if utilized), shale shakers and mud conditioners (if utilized), while hydrocyclone desander and follow in the arrangement. decanting centrifugals follow in the arrangement.

When to use vacuum deaeration?

1.
2.3.
In installations with many branches and low flow rates.
For small temperature differences between supply and return. A vacuum degasser is not limited by the fluid temperature.
If a deaerator cannot be mounted on the installation for practical reasons. A vacuum degasser can be connected to almost every part of an installation
 TangShan Dachuan Mechanical Equipment Co., Ltd. is a company focuses on the production, sales and after-sales maintenance service of solid control equipment of petroleum drilling (not excavation). The main products are mud vibrating screen, vacuum degasser, desander, disilter, mud cleaner, mud gas seperator, mud agitator, desander pump, shear pump, centrifugal, flare lgnition device, mix funnel, jet mud mixer, mud tank, water tank, diesel tank, etc.
We will always supply the drilling fluid system, the parts and the technology service to ensure the efficiency in the production of our customers. Our tenet is, making the advanced technology, ensuring the good quality, and offering the best service.
advantages

1The water ring type of the vacuum degasser in the process of working, always in the constant temperature to work, the performance of safety is high.

2 Use the belt to drive, avoid the complexity of the deceleration institutions.

3 Two levels of the separation gas and the tank is the assembly, the structure is compact.
4 the mud through the window of the trochanteric spray to the wall of the tank, the effect of the degassing is good