Jun 11

Vertical cuttings dryer and HG dryer for drill cuttings treatment

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Vertical cuttings dryer and High G dryer is the 2 major processing equipment for drilling cuttings treatment. But many clients do not know the difference. Here is a sample introduction of the 2 drilling waste management to help clients find the right model equipment:

1) Vertical Cuttings Dryer (VG dryer)

Vertical Cuttings Dryer utilizes centrifugal force to dry drill cuttings with oil or synthetic base. The stainless steel screen basket rotates at speed up to 900 RPM, which generates G force up to 420 G to separate the drilling cuttings. The solids bigger than the screen opening will be blocked by the screen and fall down, the fine solids and liquid will go through the screen and recovered by the dryer. Tungsten carbide protects the flights from abrasive solids and ensures long operational life. This aids in maintaining a constant gap between the scroll and screen bowl, which is crucial for proper operation.

2) High G dryer (It is also called as cuttings dryer, HG dryer, or high G drying shaker)

GN High G Force Drying shaker is design for primary solids control and drying the cuttings from the primary solids control equipment (solids control shale shaker, mud cleaner, desander, and desilter), recover useable drilling fluids and ultra-fine sands, provide solids in a consistently stackable and conveyable form and requires no expensive chemicals or polymers.

GN high G drying Shaker can generate G force Up to 8.0 G. The G force is adjustable. The high G force and achieve a dryer solids separation and recovery more usable drilling fluids, while the shaker screen servicing time will be shorten. The lower G force and ensure a longer life time of the shaker screens. The operation people can balance the performance and screen servicing time depending on the mud condition.

In many case, the drilling rig will utilize water base mud in some stage and then oil base mud will be used for deeper drilling. Clients can choose booth VG dryer and HG dryer in their pitless drilling cuttings recovery system. Equip a dual discharge on the screw conveyor for feeding. Job site can choose to treat with VG or HG flexibly.

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Jun 04

Two sets Construction slurry dewatering system for America Client

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This week, GN Solids Control finished fabrication of another 2 sets Hydro Vac Slurry Treatment dewatering system. The 2 sets Hydro Vac Slurry Treatment dewatering system is designed for construction field waste water treatment. They will be shipped to the sea port for an America client.

The hydro vac construction slurry separation system is composed of below treatment modular:

1) Feeding Hopper modular for waste collection: A hopper tank with coarse screens to collect the waste material and remove the big particles, like rocks.

2) Scalping shale Shaker separation modular. The scalping shale shaker separation modular is composed of a Scalping Shale shaker and a hold tank package. The scalping shale shaker is equipped with special metal frame screen with big opening to remove big solids. It can reduce the wearing of next processing equipment. The recovered liquid will be collected by the mud tank under the scalping shale shaker.

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3) Double deck shale shaker unit for fine solids separation: the double deck shale shaker is located in #2 mud tank. As the waste material is already pre-separated by scalping shale shaker, the double deck shale shaker is equipped with normal API shaker screen for D100 separation.

4) Hydro Vac Slurry Treatment modular: Desilter hydra cyclone is used in this modular for hydra separation. The cut point of desilter modular is up to 20microns.

5) The final modular is centrifuge dewatering unit. Big bowl and High speed decanter centrifuge will be used together with chemical dosing system for dewatering treatment. GN Solids Control makes different sizes of decanter centrifuges to suit for difference types of waste material application. The centrifuge bowl size varies from 9inch, 14inch, 18inch, 20inch and the biggest bowl 30 inch.

If clients want more information of the Construction slurry dewatering system, you can contact GN Solids Control. Besides the Construction slurry dewatering system, GN Solids Control can also make automatic tank cleaning system, waste water treatment system, oily sludge separation system, etc…

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May 30

GN Solids Control Oily sludge separation system

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GN Solids control makes complete solution for oil field oily sludge separation, it can get output solids with limited oil content, water with limited oil and soil, and oil with low content oil and soil.

GN oily sludge separation system can be used to treat below materials, it is the typical oily sludge GN Solids Control oily sludge separation system can treat, but it not only limited to below materials:
1) The oily sludge and waste from Crude Oil storage tank cleaning sludge
2) The oily sludge and waste from Refinery plant waste oil sludge
3) The oily sludge and waste from Drilling waste disposal.

GN oily sludge separation system is including below processing unit:
1) The solids and sludge vacuum transfer pump unit. It is 100% Air driven pump without electric driven parts.
2) The pre-mixing and heating system, it is equipped with slurry transfer pump, mud agitator, mud tank, and heating system.
3) The shale shaker separation system with mud tank and heating system.
4) Dewatering centrifuge unit for solids and liquid 2-phase separation
5) Disc centrifuge for 3-phase separation: solids, water and oil

Below is some popular questions clients are normally concern:
1) The air compressor was excluded. Can they send a quotation or specification?
GN can send clients the specification for the air compressor, as GN is not the manufacturer for air compressor. It’s better client to buy for them. GN need to know if clients need GN to provide the Vacuum pump for suction of the oil sludge to recommend the suitable model air compressor.

2) How will they heat up the sludge to 70 degrees C? Is it Electrical or by a heat exchanger? I did not see the price for the heat exchanger (Boiler)
GN answers: You can use the hot water boiler to heat up by steam, or you can use hot oil boilers. We already have the heating lines inside the tank; you can feed it with hot steam or hot oil. The volume of the hot heat depends on the ambient temperature. What will be the minimum ambient temperature for your operation? So we can calculate the size of the boiler for you.

3) In the Process Flow Diagram “PFD”, they mentioned about the water treatment unit, it was not included in the price
Mostly clients does not need this one, since GN unit already meet you requirements.

4) What is the maximum solid content that can be fed to the decanter? Before feeding the the shale shaker, in the premixing tank, you need to control the solids below 20%, to the decanter the solids should be below 20%.

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May 19

Rapid Liquid Mud Plant for oil and gas drilling rigs

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Liquid Mud Plant is big tank mud system for mud mixing and storage for drilling rigs. It is used to prepare qualified drilling fluids for drilling rigs.

GN Solids Control can do the Rapid Liquid Mud Plant (LMP) to suit for different applications. The Rapid Liquid Mud Plant can also be called as RDLMP (or Rapid Deployment Liquid Mud Plant), or Swift Liquid Mud Plant. The plant is good, stackable and modular.

GN Solids Control has done Rapid Liquid Mud Plant (LMP) for many Chinese domestic and international projects, like for COSL (China Oil Services Limited) and CNOOC (China National Offershore Oil Company). Each Tank of the Rapid Liquid Mud Plant (LMP) can up to 500BBL, or per clients’ request, it is stackable and modular. http://www.gnsolidscontrol.com/drilling-fluids/liquid-mud-plant-lmp-china-oilfield-services-limited-cosl

The Liquid Mud Plant is always composed of horizontal mud mixing tanks, vertical mud storage tanks, vertical silo tanks, decanter centrifuge system, mud mixing pump and hopper system, mud shearing system, and some time, the shale shaker systems.

Mud agitator is the major equipment of liquid mud plant. There will be big quantity mud agitators used in liquid mud plant. GN Solids Control offers a options of mud agitator:

Option 1 is the normal Chinese standard: The agitator is equipped with worn gearbox reducer. It is economic standard.

Option 2: the agitator is equipped heavy duty helical bevel reducers. The torque of helical bevel reducer is much bigger than the same power worn gear reducer. Although the helical bevel reducer cost much than the worn gear reducer agitator, but it can save power.

Decanter centrifuge package is used in the liquid mud plant to reduce the mud weight. GN Solids Control equipped the decanter centrifuge unit with its feeding screw pump on a telescopic skid, and it is the same skid with mixing pump and hopper unit for easy movement.

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May 12

Oily sludge treatment – Thermal Desorption treatment

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Thermal Desorption treatment unit, short named TDU, is advanced equipment to treatment oily sludge waste.

Below is a general working process of the Thermal Desorption treatment unit:

Step 1: A Screw Conveyer transfer the oily sludge to the Sludge washing machine. In the Sludge washing machine, the sludge will be heated and some chemicals will be added to make it easy for separation.

Step 2: After the sludge washing machine processing, the sludge will be moved to high G drying shaker. Fine screens will be used on the shaker to remove solids above 60 microns. Fluids phase (oil, water and fine soil mixture) and solids discharge will be generated in this process.

Fluids phase from high G drying shaker will fall down to the catch tank under the shaker. Solids discharged from high G drying shaker will be moved to the Thermal Desorption unit to recovery oil and dry the solids (OOC≤0.5%).

Step 3: Fluids phase from high G drying shaker is transferred to high speed decanter centrifuge by a screw pump; flocculants from chemical enhancing system will also be transferred to the high speed centrifuge. The fluids and flocculants will be mixed before enter into decanter centrifuge for separation.
After the dewatering centrifuge treatment, 2 products will be generated:
Fluids mixture of oil, water and some ultra-fine solids: will be separated by oil water Separator.
Fine sands: will be moved to Thermal Desorption unit to recovery oil and dry the solids (OOC≤0.5%).

Step 4: Oil water separator: to get oil, water mixture
Oil: Can be sold to the refine companies. If the oil is clean enough, or the TDU burner allowed, the oil can be used for fuel oil.
Water mixture: Treated by water heater to get clean water (for reuse or other applications) and mud sludge (back to Sludge washing machine for recycling treatment).
Final products from Thermal Desorption treatment unit :
1) Solids : OOC≤0.5%
2) Clean mud
3) Oil

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Apr 07

10 sets international high standard decanter centrifuge for Middle-east

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Recently, another 10 sets decanter centrifuge are ready for shipment. The 10 sets centrifuges will be shipped to middle-east to service the drilling rig mud systems there for drilling mud solids control and drilling waste management.

It is 14 inch high standard VFD decanter centrifuge: the motors, VFD control panels, cable glands, socket and plugs are complied with International IECEx standard for explosion proof for Zone 1 (equal to Class I Division 1 of U.S. and Canada standard) applications. All cables are designed for 110C degree high temperature ambient.

All VFD drives of the VFD panels are heavy duty type for reliable performance and longer service time. Futhermore, as the temperature in Middle East is high in summer reason. All the VFD panels for the 10 sets decanter centrifuges are equipped with Air conditioner automatically cooling system for high temperature ambient up to 55 C degree.

IECEx is the international standard for explosion proof. GN can also offer European standard ATEx, or China national explosion proof CNEx for explosion proof. Mostly, CNEx can suit for most of the project. But for some U.S companies or European end users, they will request IECEx or ATEx standard. Clients can specify the right EX standard they while inquire or before sending orders.

GN Solids Control makes full line drilling mud recycling and treatment system and drilling cuttings management equipment. GN Solids Control does offer Zero-discharge treatment system for drilling rigs for pitless solution.

Besides decanter centrifuges, below are some other equipment GN Solids Control does make for waste management:
1) High G drying shaker: Drying the cuttings discharged from your rig shakers.
2) Dewatering unit + dewatering centrifuge: It is not showing on the layout, but it is need to reduce the mud weight from High speed centrifuge.
3) Solidification unit: to further drying all the cuttings from your rig mud system and the above cuttings management equipment.
4) Screen vacuum unit

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Mar 02

This week, a full package of compact oily sludge separation system was finished from GN factory in Beijing China. The compact design fast movable oily sludge treatment system is purchased by a reputable Environmental Solutions Company from China domestic market.

There are 3-stage separation equipment included in the oily sludge treatment system.

1) There is a 2-panel small footprint shale shaker equipped in the system for coarse solids separation. The model is GNZS752. As mostly, the oily waste come out from different sources and it is mixture of different wastes. There may be big size solids in side. The big sides solids may block or even broken the centrifuges. The small size shale shaker is used to remove the possible big size solids in the sludge.

2) There are 2 centrifuges in the oily sludge treatment system. The first centrifuge we call it decanter centrifuge. The decanter centrifuge model is GNLW224, it is a 2-phase separation centrifuge. The 2-phase decanter centrifuge is help to remove solids or soil from liquid mixture. The 9 inch centrifuge is a min size decanter centrifuge. The bowl diameter is only 9 inch, but the bowl length and diameter ration is up to 4. The longer ration can help to get cleaner liquid. It is the smallest centrifuge from GN Solids Control for industry separation.

3) The second centrifuge inside the oily sludge treatment system is disc centrifuge. It is also called 3-phase centrifuge. As the name mean, the disc centrifuge can separation oil, water and soil.

Many people may wonder: in case the disc centrifuge can separate and get oil, water and soil. While you add 2-phase decanter centrifuge inside the system? Really, the 2-phase decanter centrifuge is surely not to increase the cost. The disc centrifuge can only allow liquid mixture with liquid content less than 3%. Otherwise, it will damage the centrifuge. While the decanter centrifuge can allow liquid with solids content up to 15% ~ 20%. Decanter centrifuge is a necessary as pre-separation before disc centrifuge.

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Jan 26

Happy Chinese new year to all GN people and customers

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After the whole year hard working,  all GN people made a proud and happy ending for 2018. With the coming of 2019 Chinese Lunar New year, all GN workshop people are working date and night in different shifts to try to delivery as more orders as possible before the Chinese Lunar new year, to minimize the any delay caused as the traditional new year holiday.

GN Solids Control new technology composite material replacement shale shaker screens have more and more market share in China and in worldwide market. 2018 is a great year for GN Solids Control. The screen market was increased nearly double compared with 2017. GN one-stop oily sludge treatment systems were exported to more new countries and areas, and pride by the clients and end users.

As most of GN people are coming from cities far away, to thank for the hardworking of all GN people through the year, besides the Wonderful annual New Year party, wonderful new year gifts and surprising annual awards for year end, GN Solids Control will further offer a 15-day holiday for the traditional new year. And for many people, it is the most important to have more time to go back to their hometown and together with their familiars to celebrate the Lunar New year.

This year, the company offers a long holiday for the big event – Chinese Lunar new year. The holiday will start from 29th Jan., until 12th Feb., all people will start working on 13th Feb. 2019.

After hard day working on 28th Jan., 2019, the most Exciting annual New Year party is coming in Sheraton Hotel, welcome clients from worldwide joint us for the big event. There will be luck time for lottery, more than 2 thirds of the people joining the New Year party have the chance to get big and surprising gifts. All annual awards for GN workers will be awarded at the year-end on the new year party, including big cash red envelops, cars, Luxury travel opportunities provided by the company etc…

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Nov 03

API Shale shaker screens conforms to API RP 13C

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There are many parameters to judge a shaker screen performance, like non-blanked area (usable screen area), conductance, API size (screen opening), mesh size, etc… All these parameters will caused different performance of the replacement screens and the effect the shale shaker performance. There are so many manufacturers for replacement screens, how the users select the right screens for his applications?

API RP 13C is the international recognized standard for replacement shaker screen manufacturing. It means that, if the replacement screens are made per international API RP 13C standard, it ensures that, for the same screen models, the same API size of from different suppliers are all interchangeable.
Why it is the same API size screens are interchangeable for the same screen model? We will be clear after we know the definition of the screen parameters.

1) Mesh size: the size is only determine the hole quantity per square inch on the screen mesh. It depends more on the technology of screen making and the wire cloth size.

2) Conductance (unit: kd/mm). It defines the ability of fluids can go through the screen wiremesh. For the same screen, a bigger conductance means bigger capacity to handle drilling fluids.

3) The non-blanked area of a screen means the usable area of the screen to allow the drilling fluids going through. Generally speaking, the more non-blanked area, the better of the screen handling capacity.

4) The API size of the screen: As per API RP 13C Standard, if the Cut Point is within the same range, it will be defined as the same API size. It can be used as equivalent screen. Like all screens with cut point bigger than 165 microns but smaller than 196 microns can all be defined as API 80.

So the screen manufactured by different suppliers, no matter Chinese maker or U.S maker, no matter GN Solids Control,  Swaco, Derrick or Brandt, the same API screen will all be replaceable even if the Mesh size , or Part No is different.

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Aug 19

The intelligent control variable frequency positive pressure cabinet is integrated with HMI, PLC and frequency converter. It can realize the frequency conversion control mode of the mud centrifuge, which makes the operation more humanized. The customer can select different speed and difference speed according to the material conditions on site.

 

The automatic control makes the equipment more widely applicable to the site. The customer sets the centrifuge main engine speed 0-3200r/min according to different materials, and the differential speed is adjusted at 10-45r/min. The state screen automatically reminds the centrifuge maintenance parts to be regularly maintained. The alarm compensates for the damage caused by the negligence of the staff; the alarm screen shows the fault alarm when the electrical equipment has a problem, and the user can better find the problem in time.

PLC smart control VFD centrifuge

PLC smart control VFD centrifuge

Positive pressure control cabinet operation has more clean instrument air than previous explosion-proof frequency conversion cabinets. For most customers, it seems more troublesome than the explosion-proof control cabinet. It is more reasonable from the following points:

  1. Performance and heat dissipation of the inverter (take ABB inverter as an example)

Because of the working principle, the inverter needs to dissipate a large amount of heat during normal operation. Under normal circumstances, the inverter works best at a constant temperature (generally 40-50 °c). How is this heat in a closed space? In order to pass, there are usually two ways; a) heat exchange b) cooling by the outside world.

 

A), explosion-proof inverter for heat exchange:

 

Explosion-proof inverter

B), positive pressure ventilation type control cabinet

 

Positive pressure ventilation type control cabinet

 

  1. We are in terms of explosion-proof performance
  2. A) Explosion-proof type explosion-proof:

 

In the case of this explosion-proof mode, the explosive gas can enter the casing, but the flame gas cannot propagate to the outside through the joint surface in the event of an explosion, that is, the explosion-proof body can prevent the flame in the box from spreading outward after the explosion, but Explosion inside the cabinet can damage the components and is also a loss.

 

B), positive pressure type explosion-proof control cabinet

 

Through this method, the pressure of the internal instrument to enter the clean instrument gas is higher than the outside, that is, the pressure inside the box is higher than that outside the box, and the explosive mixture of the outside can not enter the tank or the concentration of the explosive gas entering the explosion limit. , so there will be no bad explosion at all.

 

The total positive pressure explosion-proof control cabinet seems to be more troublesome than the explosion-proof control cabinet, but it is safe and reasonable.

Engineers can choose according to different equipment use site requirements

More question,welcome contact GN solids control

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