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.

Solids Control Structure and working principle

Solid control system consists of a set of storage tanks and drilling fluid solids control drilling fluid used to remove harmful solid phase composed of a group of devices, storage tanks and solid control of drilling fluid circulation tank with reserve tank is divided into two parts. Ground drilling fluid circulating tank as part of a cycle, the tank surface mounted shaker, vacuum degasser, desander desilter, centrifuges and other equipment for the purification of fluids. Reserve tank is based on the need for preparation of drilling conditions different properties of the drilling fluid, or storage may be used for different drilling conditions of the drilling fluid.


Drilling fluid purification process in the system


1, First purification


Ie mud treatment at the shaker. Preparation of a good drilling fluid under the action of the pump into the bottom of the well, and carry drilling cuttings back to the surface through the wellhead elevated tube into the mud  shaker, the drilling fluid screening out large debris.


2, Second purification


When drilling a gas dip when, through the role of the vacuum degasser will purge gas drilling fluid, thereby restoring the fluid density, fluid viscosity stable.


3, third purification


Two purified fluid supply pump enters through desander Desander, drilling fluid 40 - 60μm or more tiny harmful solid phase is separated desander li.


4, Fourth purification


Three purified by drilling into the supply pump desilter , drilling fluid 15 - 40μm above the tiny harmful solid phase desilter li be isolated.


5, Fifth purification


Four purified by centrifuge feed pump drilling fluid into the centrifuge, the centrifuge will be drilling in 5 - 15μm tiny particles separated.

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.

Function of Drilling Solid Control equipments

Solids control procedures are often ignored in many oil & gas drilling projects. Many people do not understand very well the basic principles of drilling fluids solids control. They persist that drilled solids are evil & insidious. In a short term, drilled solids increasing generally does not reveal their economic impact immediately, and the detrimental effects are also not immediately obvious on the drilling rig. But in a long term, increasing of drilled solids would generate many problems on drilling rigs. So drilled solids need to be removed at the surface by solids control equipment, such as shale shaker, mud cleaner, centrifuge, etc. to reduce the risk.

Drilled solids damage reservoirs, increasing drilling cost, and also create large drilling processing disposal cost. To drill an oil or gas well fast, safely, and under budget, it is necessary to remove the drilled solids which not only include drilling cuttings, but also sloughs that drop from the wall of borehole. If these drilled solids can not be removed timely, they would cause many problems, including:
● Filtrate damage to formation
● Drilling rate limits
● Drilling string stuck
● Borehole Problem
● Lost circulation problem
● Direct drilling fluid cost
● Increasing disposal cost

Decreasing drilled solids is analogous to buying an insurance to an event that will not happen to drilling rig. Nobody wish these above problems happen to any drilling project, but they do exist, and they are real. The effects of drilled solids on economics of drilling a well is subtle, and increasing of drilled solids does not result in a disaster immediately on a drilling rig. When the drill bit ceases to work and torque increases, driller know that it is time to pull the bit. But when the drilled solids increases, the detrimental effects are not apparent immediately.

That is why the drilling fluids are used to bring drilled solids to the surface, and removed timely by the solids control equipment, such as shale shaker, desander, desilter, mud cleaner, centrifuge, etc. But not all the solids are removed, and it is also impossible to remove all the solids. Some solids that smaller than the shaker screen openings would stay in drilling fluids, and other additive agents, such as barite, clay, etc. are also essential to adjust drilling fluids property.

Allen Lee / Sales Manager
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

Good attitude   Active action       Bright future

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.

Solids control system

Enclosed design is for ZJ-50(1500HP) drilling solids control system with treating capacity about 1500 bbls/h.

This system consists :
2 sets linear motion shale shaker BWZS70-3P,treating capacity about 240m³/h
1 sets Mud cleaner BWZS70-2S16N, 2 pcs  10' desander cones,and 16pcs 4' desilter cones.
1 sets BWZCQ270 Vacuum Degasser 
2 sets Feeding pump for Mud Cleaner,BWSB8x6-13J (55Kw) Centrifugal Pump.
1 sets BWLWF450X1000NVFD Decanting Centrifuge
1 sets Submersible Slurry Pump
4 sets  Mud Tanks ,about 1000bbls
14 sets Mud Agitators
1 sets Double-Jet mud mixing hoppers and mixing pump.
10.  1 Mud gas separator and Flare Ignition Device

BW drilling mud  purification system future
The future path of BW drilling mud purification system technology  will continue to increase the overall removal efficiency of undesirable solids from the drilling mud. This will include continued improvements in shale shaker and screen life. Research investigating alternate technology such as using vacuum techniques and different motions.With our talented engineering,they will use the leading drilling mud purification system technology to design, size and operate solids removal equipment properly. And provide end users with proper use of theequipment,and other technique help.And use the technology to carry out BW Solids Control 3P concept:  Produce first-class products for customer,Provide over-expected service for customer,Pursue unlimited value for customers.We strive to make the world class fluids processing system innovate the world's leading drilling mud purification system technology.

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.