Drilling waste management

Drilling and Completion waste generation and classification

Drilling and completion fluids and waste management into solid two elements. when the liquid waste generated from sewerage waste drilling mud separation , wash water well field , formation outflow of water, diesel motor cooling water , improvement instrumentation and wellsite sewerage water , etc. ; solid waste , together with waste drilling mud contamination occurred when separation mud, drilling cuttings square measure contaminated with harmful drilling parcels , wellsite construction residue , contaminated soil , drilling materials and packaging.

Drilling waste management, there square measure several waste substances harmful to humans , significant metal ions , some harmful parts like chemical science , once discharged into the atmosphere round the well web site , can inevitably result in soil, surface water and groundwater pollution , impact on the atmosphere cannot be assess the injury , notably in environmentally sensitive areas , would endanger people's health and life , therefore, the drilling and completion of waste treatment is important .
 

Drilling and Completion standing waste treatment abroad

At present, foreign countries usually price the event of the industry drilling and completion technology, waste disposal , from the start of the last century , the corresponding process instrumentation and installations are within the international advanced level , just like the us , Canada, France and different countries within the drilling method of drilling completed abandoned wells on liquid waste treatment employing a four solids management instrumentation to gather cuttings and dust , so were cured of their waste or transport . usually used instrumentation shale shaker, desander , desilter , decanter centrifuge, and different rubble recovery.

Brightway Centrifuge Structure

1. Structure

This decanter centrifuge consists of unit assembly of revolving half, power gear mechanism, overload unharness system, base and casing, feed tube, electrical system, etc.

Graph one shows external dimensions of the most machine while Graph five illustrates the exploded drawing of the unit.

1.1 Unit assembly of revolving half

The rotating assembly consists of such parts as bowl,  conveyor, gearbox, etc., and that is fastened horizontally on the bottom through 2 pillow blocks. The bowl may be a column - cone structure and there ar six adjustable dams with a pool depth on the large finish semi-shaft of the bowl. Inner ribs ar welded on the axis of inner columnar surface and inner conic surface. The unit of the screw conveyor is especially welded together with core pipes, accelerators, volute flight, etc. and that is placed coaxially within the bowl by the bearings on the semi-shafts of 2 finish of it. The spline housing of the large finish is connected with case by spline shaft. The screw conveyor is double-ended, left rotating, whose conveyance face is bead welded with wear-resisting laborious alloy layer.

Graph seven indicates the exploded drawing of motion components assembly.

1.2 Power transmission and overload unharness system

1.2.1 Power transmission

The main power transmission drives the bowl to rotate by motor and hydro-coupling put in on the axis of it, through belts and pulleys. the rear power transmission drives the input shaft of case to rotate by motor and machine, through reducer and therefore the machine of case and thru overload unharness.

1.2.2 Over load unharness

This machine adopts a double protection live of mechanism-electric appliance, embody hydro-coupling, mechanic overload unharness.

1.3 Base and casing

Consist of vessel assembly, base, vibration dampers, and transport frame.

1.4 Assembly of feed tube

The assembly of feed tube involves that of feed tube and improvement tube. The improvement tubes is employed for flushing the centrifuge before shuting down.

1.5 electrical system

Electric system includes management cupboard, limit switch and corresponding cables.

Brightway is the professional manufacturer in the solids control euqipment and drilling fluid system.Welcome every customer to visit our factory.

What centrifuge we can provide similar as MI Swaco CD-250 centrifuge?

Brightway Centrifuge BWLWF220 can be used for the mineral drilling rigs, with the similar capacity as MI Swaco CD-250 centrifuge.

Decanter centrifuge

Model	CD-250	BWLWF220
Brand	MI-SWACO	Brightway
Bowl diameter	253mm	220mm
Bowl length	941mm	880mm
Rotary speed	0~4500rpm	0~4800rpm
	4000rpm operation speed	4000rpm operation speed
G-force	2773G	2840G
Weight	1010 KGS	1000KGS

Advantage:

1. Small footprint
2. High efficiency, with max speed as 4800 rpm and separation force as 2840G
3. Already being used in mineral drilling,diamond drilling, HDD etc.
4. Competitive price 

As the professional solids control equipment manufacturer, we also produce shale shaker, vacuum degasser, mud cleaner, mud tank, and mud gas separator etc.

Allen Lee
Name：Xian Brightway Energy Equipment Co., Ltd
Phone：+86-29-89305763
Fax：+86-29-89305769
Address：No.118 Fuyu Road, Yuhua Industrial Zone, Yanta District, Xi’an City, China
E-mail：brightway@bwsolidscontrol.com

All rights by Alice from Xi'an BW solids control Co.,Ltd.

Decanting Centrifuge for Solids Control & Waste Management

Decanting centrifuge is the most important solids purification units in drilling fluids solids control system, centrifuge is normally mounted at the last stage in the system, to remove non aggravated drilling mud, and can remove the evil solids that is larger than 2 μm, and remove the superfluous colloid in the drilling fluids. and control the fluids viscosity by collecting the barites in the drilling mud. Centrifuge can also collect the liquid phase by recovering the drilling mud that flow through the hydro-cyclone, and Centrifuge is also an ideal equipment to treat oil drilling fluids waste, preventing environmental pollution.

Centrifuge is consist of main & auxiliary electrical motor, belt, feed pipe, drum, spiral propeller, differential mechanism, etc. The main motor drives the drum and outer casing of differential mechanism through the belt, while the auxiliary motor drives the spiral propeller through the differential mechanism, which would rotate the drum & spiral propeller in the same direction, but with speed difference.
 
The drilling fluids would enter into the spiral propeller center through the feeding pipe. When the spiral propeller rotates, with the centrifugal effect, the solids in the drilling fluids would be thrown to the inner wall of drum, and pushed to the smaller end of the drum and be out through the discharge port, while the liquid phase would flow through the spiral propeller to the larger end, to finish the solid-liquid separation processing.

As an professional manufacturer,BW solid control for drilling fluid systems: Shale Shaker, Vacuum Degasser, Mud Cleaner, Desander Cleaner, Desilter Cleaner, Decanting Centrifuge, Sand Pump, Submersible Slurry Pump, Mud Agitator, Self-Suction Sand Pump, Jet Mud Mixer, Mud Gas Separator, Mud Gun, Series Screw Pump, Shear Pump, Flare Ignition Device, Oil Tank, Water Tank, Mud Tank etc..

Good attitude     Active action       Bright future

MI -Swaco centrifuge VS BW centrifuge

Centrifuge is a widely used equipment in the O&G drilling mud system. It always adopts decanter principle to separate suspension liquid. In the tank system, centrifuge is located as the fourth stage handling equipments to treat the drilling mud out from the mud cleaner.

MI-Swaco is one of the world famous solids control specialist either in products quality or in service. Known to all the persons in solids control field, MI-Swaco equipments also have a higher price. Many clients inquiried us for the equivalent equipments of MI-Swaco, Derrick and NOV or some other famous brand. 

Take the MI-Swaco centrifuge model of 518 HV as an example. A customer inquire us for whether we can offer a equivalent for equipment. After comparing the main parameter, we propose our model of BW LWF450-1250N to customer for reference, below is the main parameters compare:

So far, BW dancanting centrifuge is more and more popular in word market, just shortly before we exported 6 sets centrifuge to Nigeria and Brazil for 1000HP to 2000HP drilling rig. For more information on BW centrifuge and other solids control equipments, just feel free to contact with us.

     Allen Lee  / Sales Manager

Name：Xian Brightway Energy Equipment Co., Ltd

Phone：+86-29-89300061 +86-29-89305763

Fax：+86-29-89305769

Address：No.118 Fuyu Road, Yuhua Industrial Zone, Yanta District, Xi’an City, China

E-mail：brightway@bwsolidscontrol.com

BW Decanter Centrifuge Working Principle and Function

Decanter centrifuge is the important phase cleaning equipment in a complete solids control system to separate fine solids. It is the most high technology products among all solids control equipments.

Centrifuge Working Principle

A centrifuge works on the principle of accelerated settling. By imparting addition “G” forces to the content of a centrifuge, solids (in a solids laden fluid) will settle much quicker. To understand how a decanting centrifuge works after desilter , first look at a simple sedimentation vessel.
Solids in this fluid will settle to the bottom of the vessel over a period of time. One way to speed the process of settling is to reduce the height of the vessel so the solids do not have as far to drop. If a specific volume is required, the vessels dimensions can be lengthened or widened . Depending on the rheological properties of the fluid and the size and density of the solids, settling time can still prove quite slow. 
Centrifuge Functions
A decanting centrifuge consists of a conical, horizontal steel bowl that rotates at high speed using a double screw type conveyor. The conveyor rotates in the same direction as the outer bowl but at a slightly slower speed. 
Functions including:
1) De-water hydrocyclone underflow;
2) Remove drilled solids from the active mud system
3) Control rheological properties by removing colloidal particles in weighted drilling fluids.

A decanting centrifuge is so named because it decants or removes free liquid from separated solids. It consists of a conveying screw inside a rotating bowl By exerting increased G-force on the drilling fluid, the particles are accelerated and settle on the outside of the bowl The free liquid pool is removed and the solids are pushed away and discharged from the bowl. 
Please contact BW Solids for inquiry freely.

The problems of Centrifuge

Because the centrifuge is high rotate speed equipment, it should take urgent measure (stop the operation) in case some abnormal phenomenon happens. The solution detail is after the correct understand instruction book, and take the measures accordingly.

Fault 1. The centrifuge vibration is heavy.
Fault cause, 1. The last time solid particle clean is not complete; 2. defective shock absorber
Exclusion methods: 1. Clean the expansion cylinder and conveyor. 2. Replace the shock absorber

Fault 2. The bearing temperature is overhigh ( higher than 75 ℃)
Fault cause, 1. oil lack 2. Bearing wear
Exclusion methods: 1. Greasing. 2. Replace the bearing

Fault 3. Drum does not rotate after the main motor starts
Fault cause, too much solid particles accumulated in the main motor caused overload.
Exclusion methods: Clean the drum solid equipment particles, and adjust the inlet fluid.

Fault 4. Speed differential has abnormal voice
Fault cause 1. Unreasonable choosing of oil amount and oil type. 2. Bearing wear
Exclusion methods, 1. Check the oil mount and its type. 2. Replace the bearing.

Fault 5. Slag discharge mouth has clear plasma discharge
Fault cause: overload mud supply
Exclusion methods: regulate the mud cleaner supply pump

Name：Xian BW Solids Control Co.,Ltd

Phone：+86-29-89300061 +86-29-89305763

Fax：+86-29-89305769

Address：No.118 Fuyu Road, Yuhua Industrial Zone, Yanta District, Xi’an City, China

E-mail：brightway@bwsolidscontrol.com

Decanting Centrifuge

BWLWF series decanting centrifuge is the fourth phase solids control equipments. It is set behind the mud cleaner and desilter cleaner, using the principle of centrifugal action to separate the solid particles of 2-7μm from the drilling fluids. According to different speed we have middle speed decanting centrifuge, high speed decanting centrifuge and high speed variable frequency decanting centrifuge.



Features & Benefits of BW Decanting Centrifuge:
1. Combination the abroad and domestic oilfield site experience, invite the senior consultant to optimize structure design and continue to test.
2. Main body adopt Q235 material, core components adopt Q345 high-strength wear-resistant alloy material
3. Screw propeller made from 1CR18NI9TI material, bowl made from SS304 material, bearing adopt SKF or FAG.
4. Discharge port protected by tungsten carbon alloy ring or coating.
5. Electric elment adopt SIMENS or Schneider
6. Main frame has been grinding sand, pickling phosphating and hot dip galvanizing
7. Painting: Heavy anti-corrosion paint adopt national famous Dewei Brand.
8. Electrinic control system is from Huarong brand or Helong brand explosion-proof electronic switch.
9. Adopt Nanyang or other national famous brand explosion-proof motor

10.Reduce shocking with high strength seismic composite material.

Parameters of Decanting Centrifuge:

Oilfield Decanter Centrifuge For drilling fluids
Decanter centrifuge are used to process unweighted and weighted, water-based and oil-based drilling fluids (muds). Mechanical energy is utilized to increase the gravitational force exerted on solids that are present in the mud system.oilfield Decanting Centrifuge are able to apply over 3,000 G-forces on the liquid/solids mixture, which separates the heavier solids from the lighter solids. Additionally, high G-forces separate fine solids from liquid.
Mechanical separation of solids from the mud system through the use of a decanter centrifuge is a highly-effective means of maintaining proper mud weight and viscosity.

 When used in conjunction with other Solids control equipment, decanting centrifuge enable users to maintain the mud properties within the prescribed range as per the drilling program. Typically,oilfield decanting centrifuge is the final processing units in the arrangement of solids control equipment. Decanting centrifuge preceded by gas busters, gumbo removal equipment (if utilized),shale shakers, mud Cleaners (if utilized), Vacuum degassers and hyrdocyclones.