Tag Archives: screw conveyor

Variable speed centrifuge maintenance after using several years

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GN decanter centrifuge with tungsten alloy tiles screw conveyor can have a much longer lifetime with good working performance. The Ex-proof control panel with positive pressurized air can keep inside lower temperature, and keep it clean without dust and keep it dry; all the features make the centrifuge & VFD control panel good performance and less maintenance.

One client from Africa, they bought 2 batches decanter centrifuge from us in past 3 years. The client is local land rig drilling contractor with 7 land rigs. They use the centrifuge for solids control, each rig need two sets centrifuge, the client have their own centrifuge from us, and they also rent some centrifuges locally.

14-inch-decanter-centrifuge-2

Recently, we have got news from the clients that they are doing some maintenance for the VFD control panel and are faced with some challenges.

  • Challenge 1: the centrifuge cannot separate anything
  • Challenge 2: the PLC control panel don’t display correct rotation speed value as reset
  • Challenge 3: The centrifuge motor don’t rotate in correct direction

After several times discussion by email and by phones, we are clear that all the disorder is because of the electrical components in the VFD control panel which have been replaced by client is not working in correct mode. After we give instruction on how to adjust the Omren module components in the Control box, the centrifuge can work in correct mode as before.

The centrifuge motor rotation direction is also very important to the centrifuge performance. If the rotation direction is not correct, it will not remove solids and will not work normally. We have direction arrow in red stick on the motor end, it is much necessary for client to check the rotation direction before test the centrifuge.

Except for centrifuge, GN Solids Control also provide all line of solids control equipment, like shale shaker, mud cleaner, mud agitator, mud gun, shear pump, screw pump, slurry pump, mud tanks etc.

For drilling waste management, the products line including: vertical cuttings dryer, thermal desorption unit, fixation unit, screw conveyor etc.

GN Receive Solids Control package Tender Invitation from Africa

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With oil price going up, we just receive tender Invitation from Africa Client, even we don’t participate in overseas tender directly, we can share the news and this maybe a signal of local requirements is arising. The tender on solids control package including below parts;

  1. Provision of Secondary Mud Recovery/Cuttings Dryer (either vertical or horizontal) with feed pump capable of obtaining less than 5% (50gm/kg) cuttings oil retention (COR).

GN response: all GN Vertical cuttings dryer are high standard equipment, which is equivalent to Swaco vertical cuttings dryer / CSI cuttings dryer. GN vertical cuttings dryer are working in many drilling rig site and show high performance.

GNCD930 series cuttings dryer have been working for Oil based mud cuttings treatment over 3 years, the OOC can be reduced to below 5%.

2015.12.02_vertical_cuttings_dryer

  1. Provision of Low and High speed centrifuges with feed pumps for drilling fluids solids control to assist in obtaining less than 5% COR. The units shall have independent bowl and scroll speeds for processing the synthetic base fluid.

GN response: we can offer fixed speed low speed centrifuge / fixed speed high speed centrifuge. And we can offer variable speed centrifuge with PLC control panel, the client can get different speed for different application, much convenient for speed adjustment.

GNLW363CG premium centrifuge is the most popular model, the 14inch centrifuge is equivalent to Derrick DE1000 centrifuge or Swaco 518 centrifuges, much more cost-effective than US brand centrifuges.

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Dual Centrifuge System for Mining Project

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Mining project may generate some waste water / waste mud which need to be treated before discharge. GN Solids Control mud treatment system can also apply in this field. Recently we have a similar project for Philippines. It is dual centrifuge system for Mining project

The Dual centrifuge system configuration as below:

1) One set shale shaker to remove the coarse solids particles, separation points above 100microns to 200microns.

The shale shaker GNZS594E-HB is GN 4 panel shaker, which is replacement shaker as Swaco Mongoose. Similar design with composite material shaker screen can reach high treatment performance. For more info of GN Shale shaker, pls check from GN shale shaker website.

2) Two sets high speed centrifuges to remove the fine solids particles, separation points above 2-5 microns.

The centrifuge, GNLW363CG-VFD is GN high speed & variable speed & high configuration decanter centrifuge, which competing with US/European centrifuge brands. Centrifuge applications including

a. High performance water based mud treatment for oil drilling rig solids control

b. High performance oil based mud treatment for oil drilling rig solids control

c. High performance waste water treatment for oil drilling rig drilling waste management

d. High performance barite recovery / mud weight cutting for oil drilling rig solids control

2015.11.05 dual centrifuge system for mining project

 

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Verti-G dryer with screw conveyor to Middle East

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GN Solids Control Verti-G dryer (vertical cuttings dryer) is verified high quality products in many drilling rig site, like Shell jobsite, Baker Hughes drilling site etc. Even compared with CSI vertical cuttings dryer, in some bad mud cuttings conditions, GN Solids brand Verti-G dryer can also work in high performance. This is also the technology accumulation with many years research, test and jobsite experience.

Last year, we have exported over 10 sets verti-G dryer with screw conveyors to Middle East, the main client is NIDC. As Iran government strict policy on environment protection, GN Solids Control have a big chance to match large quantity of verti-G dryer with screw conveyors for NIDC drilling rigs.

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One package of verti-G dryer with screw conveyors including below items:

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Solids Control Centrifuge & vertical dryer Delivery

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Yesterday, GN Solids Control dispatch a big batch of solids control centrifuge & vertical dryer, with pumps, screw conveyors, spare parts etc, totally by 7 12meter long vehicles. The customers is international drilling company with large quantity of land rigs & some workover rigs. After tested GN centrifuge in jobsite, this old customer buys more and more solids control equipment package from us from last year.

For this order, the detail of purchase order is below:

1) 6 sets decanter centrifuge, which will be used for 3 rigs. The centrifuge will be used for barite recovery and mud weight cutting. GN Solids Control centrifuge learn and upgrade many highlights from Alfa Laval, the good frame centrifuge brand from Germany. Now, we have upgrade to 3rd generation centrifuge. The price is good and performance is much better than before.

decanter centrifuge for drilling

 

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Screw Conveyor Application in Drilling Waste Management

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Screw conveyor is widely used in drilling mud solids control & waste management as important transportation equipment. Proper use of screw conveyor can make the field job with small footprint and high working efficiency. Let’s draw some conclusions on screw conveyor application in drilling waste management.

screw conveyor

1) Connection between mud solids control system & drilling waste management system

The screw conveyor can positioned paralleled with solids control system, equipment like shale shaker, desander, desilter (or mud cleaner, combination of desander & desilter). The paralleled screw conveyor can collect the drilling cuttings discharged from solids control equipment and transport to next slant screw conveyor. This screw conveyor is for feeding for Hi-G dryer or Vertical-G dryer.

2) Feeding for Hi-G dryer & Vertical-G dryer

GN drilling waste management system, the first separation phase is generally equipped with Hi-G dryer or Vertical-G dryer. They both can be used for water based mud, oil based mud & synthetic based mud. Generally, the Hi-G dryer is more proper for water based mud; vertical-G dryer is more proper for synthetic based mud with comprehensive consideration.

The screw conveyor can make the feeding more even/homogeneous, in this case, the working performance of Hi-G dryer or vertical-G dryer can be stable.

Vertical-G dryer working jobsite video: http://www.gnsolidscontrol.com/video/vertical-cuttings-dryer-water-based-mud-drilling-waste

Decanter Centrifuge working jobsite video: http://www.gnsolidscontrol.com/video/water-based-mud-decanter-centrifuge-argentina

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Screw Conveyor for Drilling Waste Transportation

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Hereunder, we want to introduce a kind of equipment connected solid control system and waste management system. It is screw conveyor, or name it auger. It is utilized to transfer solid waste or slurry from solids control system (including shale shaker, mud cleaner or centrifuge) to drilling waste systems for further treatment.

screw conveyor

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Screw Conveyor for Drill Cuttings

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GN designed and produced customized screw conveyorfor drill cuttings. We can design screw conveyor system according to client’s requirement.

Screw Conveyor for drill cuttings

Screw Conveyor for drill cuttings

GN has standard 14 inch and 18 inch diameter screw conveyor for option, also you can choose 2 section, 3 section, or 4 section ( maximum). Each Screw with electric motor and control panel, we also provide motor and control panel with IEC certification for option. The painting and material can also be choose, we have carbon steel, stainless steel and another much harder material than stainless steel for option. The installation tilt Angle of the Auger has 2 options, ≤5°or ≤40°. You can choose fixed speed or variable speed drive for the screw propeller.

The screw conveyor is a simple way to transport drilled solids. Screw conveyors are typically used to transport drilled cuttings from the shale shaker area to a discharge port, skip or to secondary processing equipment ( like drilling waste management system). The inside scroll( screw) also called auger, which is drived by a electric motor, drill cutting is fed into the Screw Conveyor and transported along by the rotating scroll.

Screw conveyor size and horsepower requirements will vary, dependent upon the length of the run, bit size, rate of penetration and flow rate. Additional sizes are available upon request. For detailed chart, pls contact GN solids control.

Vacuum Collection System for drilling cutting

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Together with Vacuum Collection System, Screw conveyor is also applied for collection of drilling cuttings? What is their difference in function?

Screw conveyor is the main equipment to collect drill cuttings from solids control equipments, in actual application, vacuum unit is used to transfer the cuttings from one screw conveyor to another, then the 2ndscrew conveyor transfer the cuttings to cutting dryer. Otherwise the position ofshould be higher than the inlet of cutting dryer, or the position of cutting dryer should be very low, it is not convenient to locate them in site.

drilling waste management

drilling waste management

The M-I SWACO vacuum collection system consists of Cuttings Collection Boxes, a Rig Vacuum Tank, a vacuum rotary hopper and a Vacuum Power Skid. It has the advantages of being a totally contained system powerful enough to transport both fluids and cuttings vertically as well as horizontally over fairly long distances. Modular and adaptable, the system minimizes the amount of floor space required for operation. Further, once on-line, the system does not interrupt the drilling operation.

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