Drilling mud Equipment

The horizontal Solid Bowl decanter centrifuge design by GN Solids Control is very popular for oilfield drilling mud solids control application of drilling waste management system.

The centrifuge are the solid bowl, horizontal, continuous feed, scroll type specifically designed for drilling mud processes to continuously separate one solid and one liquid phaseMounted on a rugged, portable skid made of a fabricated carbon steel base with 304 stainless steel wetted parts.

Solid bowl decanter type centrifuges often will dewater materials which are too fine for effective dewatering by filtering centrifuges.

In decanter-type units, extraction of liquid takes place in the cylindrical part of the bowl. Dewatering of solids by compression of the cake takes place in the conical part of the bowl. Bowl geometry must be adapted to achieve optimum results for the desired application.

The solid bowl decanter centrifuge consists of two horizontal concentric rotating elements contained in a stationary casing. The outer rotating bowl element is tapered so that the solids discharge from a smaller radius than the liquor. The inner element is a hollow hub screw conveyor with blade tips shaped to fit closely to the contour of the bowl. Feed slurry is introduced into the conveyor hub. The feed accelerates to the machine speed the slurry is delivered by centrifugal force into the rotating bowl by way of ports in the conveyor hub. The solids settle through the liquor pool formed on the wall of the bowl. The solids are then conveyed, due to a slight differential between the screw and bowl, up the drying beach to the solids discharge ports. The clarified liquors are discharge in the opposite direction from adjustable overflow ports.

For a longer lifetime and reliable performance, suitable and on time operation and maintenance on decanter unit is essential. Below instruction from work top cantrifuge manufacturer- GN Solids Control

Operation

A. All safety protection guards shall be installed before starting up. It is forbidden to open the guards of decanter centrifuge to observe the running state of the machines.

B. During the operation of the decanter centrifuge, touch to moving parts and rotation parts should be avoided.

C. It is forbidden to brake in any way before the decanter centrifuge is stopped.

D. If there is abnormal noise and vibration, close down decanter centrifuge immediately and make troubleshooting.

E. It is forbidden to have the decanter centrifuge running at the rotating speed out of active speed that indicated in the instruction and nameplate.

△Only after power is cut off can electrical devices be wired or plugged/unplugged!

Maintenance

A. Only after power is cut off and bowl stops completely running can the decanter centrifuge be dismantled and adjusted.

B. When opening the cover of collecting box, it should be opened sufficiently and be fixed to prevent the sudden closure of the cover and injure the operators.

As a professional mud cleaning system manufacturer in China, GN Solids Control are providing rental business for the mud cleaning system to customer for drilling.Normally we provide the mud cleaning system to GN Solids Control local partners,and the local companies rent the mud system from our partner.

GN Mud Cleaning system for rental including following industry:

• Oil Gas Drilling Solids Control System, XJ350 drilling rig (350HP),XJ450 drilling rig (450HP),XJ550 drilling rig (550HP),XJ650 drilling rig (650HP),XZJ750 drilling rig (750HP),ZJ40 drilling rig (1000HP),ZJ50 drilling rig (1500HP),ZJ70 oil drilling rig (2000HP) mud tank system for rental.
• HDD(Horizontal Directional Drilling mud cleaning system for rental including:150GPM, 350GPM, 500GPM,1000GPM.
• CBM (Coal Bed Methane) drilling mud recycling system.

GN Solids Control mud system can meet standards for following countries and regions:

China, USA(America),Canada, Russia,Middle East (Kuwait, Saudi Arabia, UAE, Iran, Iraq, Oman, Yemen Qatar etc.), Latin America (Brazil,Argentina,Columbia, Venezuela etc), Australia, New Zealand, Europe, India, Indonesia,Thailand ,and Africa (Nigeria,Libya,Egypt Sudan)

What type for mud cleaning system available for rental:

• Skid Mounted mud cleaning system
• Trailer mounted mud cleaning system
• Containerized mud cleaning system.
• Hydraulic Jack up mud system

Except the complete mud system for rental, GN Solids Control also provide the rental for solids control equipments with our partner like Decanter Centrifuge, Veritcal Cutting Dryer, Shale Shakers, Mud Cleaners, Mud Tanks etc.

GN manufacture screw conveyor for drilling cutting transfer to feed the Vertical Cutting Dryer or the HI-G Dryer Shakers. The Screw conveyor allows the drilling waste treatment company to connect the Solids Control System with the drilling waste management equipment.

GN Screw Conveyor Summary 

Generally speaking A screw conveyor or auger conveyor is a mechanism that uses a rotating helical screw blade, called a “flighting“, usually within a tube, to move liquid or granular materials. They are used in many bulk handling industries. Screw conveyors in modern industry are often used horizontally or at a slight incline as an efficient way to move semi-solid materials, including food waste, wood chips, aggregates, cereal grains, animal feed, boiler ash, meat and bone meal, municipal solid waste, and many others. The design of the conveyor is dependent on operating conditions, the type of transported material and its properties. Traffic enforcement can be controlled by changing the speed of propulsion.

 

Screw Conveyors main parts

♦ Conveyor Body (tube or trough)

♦ Worm (spiral shaft with iron)

♦ End Bearings

♦ Feeding Hopper

♦ Dump-tips

♦ Drive System

 

GN Screw Conveyors Feature

♦ Conveyoring Material: Drilling Cuttings,Drilling waste solids

♦ Tilt Angle: 0~40 º

♦Temperature materials transportation: <=200 °c

GN Screw Conveyor market including USA,China,Russian,Middle East,Africa and asian countries.We give customer complete set of equipments for solids control and drilling cutting treatment.

GN Shearing pump saves the cost of mixing polymers and clays while improving mud properties. Shearing the polymers eliminates fish eyes and prevents polymer chaining (long strings), which cannot pass through the shaker screens. The Shear pump is available as a belt-driven or diesel-driven package including a mud hopper, mud gun, and transfer line orifice plate. A complete system with skid, tanks, and piping are also available.

Feartures of GN Shear Pump

The GNJQB6545 shear pump adopts a set of compound seal for no leakage at stuffing box. Inside pump is a 300series stainless steel turbine containing 44 nozzles, four scoops and shear plate. Fifty(50)% of the fluid is sheared twice each time through the pump. This turbine shear pump is mounted on a special base with belts and sheaves to drive pump, OSHA type belt guard and a 75HP(55KW)1800RPM EXPLON PEROOF U/L approved electric motor, 460 volt, 3 phase 60 cycle. Included is a special hopper(ZHP150) with nozzle sized for this
application and one mud kit as a package in order to build a complete shear and hydration system. The pump is designed to give longer service life through the improved.

Principles of the installation for shear pump

There are many principles of proper pump installation and application as well as special considerations for the pump design which, if followed, will further enhance the performance of your GNJQB turbine shear pump.

The pump should be located the liquid source so that the suction line can be short and reduce loses. The foundation should be sufficiently rigid and substantial to adsorb any vibration and support the base plate at all points. The base plate should be installed in a level
position.

The capacity of a centrifugal pump should never be adjusted by throttling the suction line, but a positive shutoff valve of a type to cause minimal turbulence should be installed in the suction line to permit the closing of the line for removal of the pump for inspection and maintenance.

The mud mixing system normally use shear pump to connect with hopper for mixing.

Desilter is the third phrase solids control equipment. It is usually used following shale shaker, desander.

Desilter is usually combined of a under fluid shale shaker and desilter hydrocyclone assy.

Under fluid shale shaker:

For a better separation result, many users will choose a under fluid shale shaker under desilter hydrocyclone assembly.

Solids phase discharged from desilter cyclone can be further separated by shale shaker. Useful mud falls into tank for recycling.

Hydrocyclone Assy:

4’’ hydrocyclone is most widely used for desilter in oil & gas drilling field. And quantity can customized per clients requirements, vary from 4 each to 24 each.

Advantages of GN brand desilter

As world top solids control manufacturer, GN Solids Control have following strong points compare with othes:

1) Big underflow shale shaker: GNZS752 for better separation and compact design with small footprint of non-underfluid model

2) 100% Polyurethane (PU) ,material for desilter cnoes with longer using lift, and interchangeable with Derrick.

3) Shut off stainless steel ball valve available for option on each cone inlet permit individual cone removal and inspection without interrupting operation of the desilter

4) Tangentially blended into the cone entry as a narrow rectangle to minimize turbulence in the upper section of the cone, allowing the solids to move quickly to the cone wall.

5) Flexable fast connection are available for user friendly assy.

The shale shaker is the most important solids control equipments, it’s the first phase of the solids control for drilling mud.The following tips will help you to achieve the
Use finest shale shaker screens possible
Unless specific drilling fluid requirements dictate otherwise, always use the finest screens possible without incurring mud carryover and with the shaker being configured in optimum set-up condition i.e. angle, pool depth etc.

Replace Damaged Shaker Screens
Never allow torn screens to be used. As holes appear change and repair out at the first opportunity.

Proper Cleaning of the Shaker
Never clean shaker screens with brushes or sticks. The poor transportation requiring the use of brushes should be addressed at source. Always use appropriate cleaning solution. Never use water with an oil or synthetic based mud.

Screen Storage.
Shale shakers are the first and main defence against solids. The screens are fundamental in the operation. Do not store, transport or handle them inappropriately.

Correct supervision
Screens can significantly improve solids control efficiency.

Never By Pass
Never by-pass the shaker except in an Emergency.

Maintenance of the Shaker
Ensure the shaker components are in good order; rubber supports, tensioning mounts etc.

For proper mixing and suspension of solids, the mud agitator must be properly sized and installed.

To properly size a mud agitator, proceed as follows:
1. Select desired style – horizontal with welded or casting impeller
2. Determine available electric power – 440V/460V/380，60HZ , 380V/400V/415V，50HZ or customized.
3. Select horsepower and impeller(s) as determined by the following factors:
a. Tank design – round or square
b. Tank dimensions
c. Maximum mud weight
d. Desired turnover ratio (TOR)

After gathering the required information, the agitator can be properly sized to meet the horsepower demand and correct agitation for the application. GN Solids Control as world top 4 solids control and waste management supplier,can offer  customized agitator size to meet different tank situation.

To ensure accurate sizing, GN recommends clients to communicate with GN people to make sure size and model.

Following are operational recommendations for mud agitators:
1. Maintain uniform tank dimensions, i.e. equal width-to-length ratio or as close as possible to equal.
2. Avoid TOR values greater than 85 seconds, as this may jeopardize solids suspension.
3. Avoid TOR values less than 40 seconds, as this may result in formation of a vortex and increase air entrapment.

Solids control system is very popular used in the oil and gas drilling, HDD and CBM drilling. For oil and gas drilling, in the past, the driller would dig a large pit on the groud to reserve the used drilling fluids. After the drilling cutting sedimented to the bottom of the mud pit, the upper lever drilling fluids would be reused. To some extent, this method could save some drilling fluids, but the enviromental harmful mud pit brought problems for the driller.

With the fast developing of the drilling industry, the traditional mud pit for solids control would not meet the driller’s request for quickly drilling, as the traditional mud pit solids control would cost much time to sediment the drilling cuttings. If the driller start a new drill, then they need new drilling fluids.

In order to enhance the efficience of solids control, reduce the cost for drilling fluids and harm to environment. The technology of pitless was brought into solids control. Pitless solids control system often used in closed loop drilling system. Including the shale shaker, mud cleaner and centrifuge based on the mud tank, the pitless solids control system could circulate the drilling fluids out of the borehole without reserving in the digged sump. The mud tank functioned as the mud pit, after treatment by the solids control equipments, the drilling fluids could be reused without waiting for cuttings sedimentation.

The cuttings discharged from the solids control system and waste management equipments like Verti G cutting drier would be moved to the cuttings drying and holding area bottom built with an impermeable clay bed covered with caliche. After complete drying, the cuttings could be transported for further disposal.

GN Solids Control, the first API certified manufacturer for drilling mud solids control and waste management equipments, could offer the complete pitless solids control system for drilling projects, for more information,please contact with GN Solids Control.

With the reason of decreasing overall environmental impact, and reducing total cost for drilling operation.Fluids recovery technology is growing fast and wide. One of the major concerns about fluid loss recovery technology is ultrafines. Vacuum screen drilling recovery system does not create fines, which solve this problem.

Vacuum shaker screen can fit all types of shakers. It sucks the drilling mud out of the cuttings as it passes over the last screen on the shaker.

Vacuum shaker screen recovery system is attaching a vacuum manifold under the shaker screen or installing a vacuum manifold that has a shaker screen attached to it. The system is attached to the shaker’s vibrating basket so the manifold vibrates with the shaker as it is running. Attached to the manifold is a vacuum line with a fluid/air separator; this is connected to the vacuum collection tank. The vacuum unit is installed as close as possible to the shaker to keep the distance that the recovered fluid is transported as short as possible.

Advantages of vacuum shaker screen system:

1. Increased emulsion stability in recovered fluid
2. Higher density in recovered fluid
3. Lower viscosity in recovered fluid
4. No detrimental effects on main drilling fluid system rheology
5. Decrease in low gravity solids to high gravity solids ratio
6. Dehumidify fluid
7. No evident increase in concentration of ultrafine solids
8. Elimination of sawdust/rubber crumb usage for mixing off shaker cuttings
9. Initial review saw a decrease in waste haulage by 20%
10. Elimination or severe reduction in oil spray gun usage to clean shakers.
11. Reduced centrifuging required
12. Improved shaker operations, allowing for finer screens to be run
13. Increased shaker screen life