Centrifuge maintenance

While operating well drilling, the drilling fluid centrifuge machinery is among the central equipment that's frequently used, its purpose is principally utilized for separating fine solid debris whose diameter size are 2-7 μm in the drilling fluid.   Using the  drilling fluid centrifuge to get rid of solid debris,  it may effectively well lubricated and  protected  the drill bit, Additionally, it has an essential role of enhancing drilling bit speed. Using the oil drilling industry ways and also the technology is getting mature; the drilling fluid centrifuge manufacturing technologies have been greatly enhanced too. However, you will find some natural mechanical issues otherwise solved it'll provide the operators many function issues.

We as manufacturer frequently seen operators encounter issues below:

1. Bowl fault.

2. Consumable parts (inlet pipe, shockproof strip) problem.

3. Excessive vibration wile machine is presently working.

4. Outlet obstructing by solids desire to remove from fluid.

5. Explosion-proof plug damage.

6. Centrifuge scroll damage.

7. Bearings failure while procedure for operation.

8. Drilling fluid centrifuge hoses damage.

We as manufacturer suggest below if such issues operators encounter

Operators must realize that regular maintenance around the centrifuge for example regular washing the inlet and outlet by filling water or diesel is dependent what type of fluid it requires process.  It's also crucial that add grease towards the bearing parts to make sure proper lube.

Operators needs regularly inspect frequently- broken parts around the drilling fluid centrifuge, so on hoses. To be able to make sure the process in using these parts in normal way this influences the development. Finally, electronic areas of the centrifuge will work the best by running certain duration of time period (like none-stop for hrs.). It requires, lessen the rapid turn off and on from the centrifuge. If correctly operate the centrifuge like mention above, and then operators will discover centrifuge failure rate is going to be reduced throughout process the drilling fluid.

PVOC Certificate for GN Mud System

Lately, GN solids control has manufactured some mud system for geothermal power drilling, which is shipped to Kenya. GN is focused on creating and accumulating solids control system for oil and gas drilling, mud system for geothermal power drilling, mud cleaning system for HDD drilling and tunneling. Using its top quality and strict quality management standards and systems, GN is the top and first API licensed solids control company in China. Recently, the client visited GN factory for inspection. The testing was effectively finished, showing the mud system works well, though there have been modification brought out by the client. Before delivery, this technique ought to be PVOC licensed.

The entire title of PVOC is Pre-Export Verification of Commodity. It's checking standards needed by KEBS for conveying commodity to Kenya. When the commodity indexed by PVOC submissions are looked over to stay in compliance with PVOC, COC (certificate of commodity) is going to be released for custom clearance otherwise, the commodity won't be permitted into Kenya. GN mud system for geothermal power drilling goes towards the catalog indexed by PVOC, so COC is needed for export otherwise; GN mud system won't be permitted shipped to Kenya.

As the customer’s visit, we're also planning documents needed for PVOC. It's at the first time we all do this, so it's just a little confusing and hard for all of us. But, with the aid of an agent for PVOC, we finally summit the documents within this week, and contains been approved. The next phase is going to be inspection from the commodity, it happened several days ago. And we cope with the inspection, we'll obtain the COC. Then GN mud system has been shipped to Kenya, and arrived in Kenya. And the customer was satisfied after the mud system performing well in the worksite.

Related Arciels:

• GN Mud Recycling System for ZJ30 rig
• 500 GPM Mud Systems for Geothermal Drilling
• Receipt of Clients from Malaysia for Discussions of Mud System of Geothermal Drilling
• Closed Loop Drilling Mud Solids Control System Minimize the Waste on Drilling Liquids
• 200GPM Mud System Delivered to Egypt Customer

Electric Tension/ frequency for solids control equipment

For oil and gas drilling area, you will find generally 2 kinds of Electric Tension/Frequency. It might make the decision by Rig Electric Tension/Frequency. Other equipment utilized in rig site should adhere to the Rig Electric Tension/frequency. The first is 460V/60HZ, this standard rig is usually from Western nations and European nations, like America, Canada etc. the other is 380V/50HZ, this standard rig is usually from Eastern nations, Like China. So, once the buyer buy some equipment with motor/ electrical parts, it is best to verify the Electric Tension/frequency first.

Like our decanter centrifuge for oil drilling and solids control, you will find two motor and an electrical control panel. GNLW363BG Centrifuge is by using two motor, one motor 37kw and something motor 11kw the control panel is really a small cabinet 600mm x 800mm x 400mm. It has to be utilized in correct Electric Tension/frequency.

1) When the centrifuge motor and control panel is 380V/50HZ, it can't work under 460V/60HZ. You will find two points:

a. when the motor working under 460V/60HZ, the motor itself not a problem for brief time, however the centrifuge speed will be much greater than stand speed ( 3200rpm), thus damages the centrifuge parts.

b. When the control panel working under 460V/60HZ, the control panel insides parts is going to be burned fast.

2) When the centrifuge motor and control panel is 460V/60HZ, it may work under 380V/50HZ for brief time for you to test the gear, but cannot working very long time.

A. the centrifuge bowl speed cannot achieve to 3200rpm.

B. the motor lifetime will be reduced.

That's why once the customer give orders on solids control equipment, we generally will confirm with customer on Electric Tension/frequency first.

Question: So what can we do when the Electric Tension/frequency is wrong once the equipment get to our jobsite?

Solution: We are able to buy Electric Tension/frequency convertor. There are some convertor manufacturers from China who are able to supply this. For instance convertor change Electric Tension/frequency from 460V/60HZ to 380V/50HZ or change Electric Tension/frequency from 380V/50HZ to 460V/60HZ. We are able to also purchase it for that customer if asked for.

Related Arciels:

• How to select proper centrifuge for project
• Introduction of shaker screen blinding
• Drilling liquids Bentonite and Barite
• Choose the right centrifuge for drilling waste management
• Why Drilling Mud Services Company Choose GN Solids Control

40 more centrifuges to Africa

The market is silent, as the oil price goes down, the market is quiet. But let us be prepared. We do not want to be focused on, but this is for Africa. When we talk about the situation right now on the market, they said.

As our press release before, in 2014, there is a few dozens decanter centrifuges are sent to Africa, and just in the early of this year, another 40sets, to Africa.

The main difference of GN decanter centrifuge, comparing other supplier in China is:

1) Bowl Material: Duplex Stainless Steel Grade 2205 made by centrifugal casting Better balance 

2) Screw and Other bowl assembly material:  SS316L Stainless Steel; 

3) Screw protection: Replaceable Tungsten Carbide Tiles and special Ceramic for mud distribution port on conveyor.

4) Heavy Duty design with Big torch Gear Box 

5) Genuine SKF bearing

6) Pressurized Stainless Steel Electrical VFD (SIEMENS or ABB Brand) Control Box by PLC smart control and touch screen

There are two sets decanter centrifuge on the offshore rig. One centrifuge is from Baker Hughes Drilling Fluids Environmental Services, the other one is from our buyer, which is local professional solids control & drilling cuttings treatment service provider. Sometimes, the offshore rig uses this two sets centrifuge alternatively ;one is in use and the other one as backup. Sometimes, they use the two centrifuge together to work more fast.

Also this could be the reason that GN decanter centrifuge operating in Transocean offshore drilling project. http://gnsolidscontrol.com/drilling-fluids/gn-centrifuge-working-on-america-transocean-offshore-rig 

In this 40 sets centrifuges to Africa, mostly are GNLW363G-VFD, this is the most popular one from GN, widely used all around the world, and many different applications. Another one is GNLW452CD, this centrifuge is also popular for barite recovery, and a modular equipment for normal solids control system. 

GN Drilling Fluids Recycle Module

GN Solids Control Company has entered into drilling fluids recycle modules for installation on Oil & Gas drilling.

The drilling fluids module we recommend is designed to accept flow capacities up to 1200GPM, degassing capacity of 1200 GPM, desanding unit capacity of 1000 GPM and desilting unit capacity of 1000 GPM, vertical cutting dryer capacity of 30~50 Ton/hour. An auger system is offered to transfer the drilling cuttings from shale shaker to vertical cuttings for further process. Two decanter centrifuges are also mounted on the tank after the mud cleaner units including high speed decanter centrifuge and middle speed decanter centrifuge. Middle speed decanter centrifuge is applied for recovering barite and high speed is utilized for removing the fine solids in the drilling fluids. All associated skids, tanks and pumps required for the system are included in a small space.

Features and Specifications

GN Linear motion GNZS 594 shakers (618 GPM capacities) with Martin or Oli vibration motor

GN fluids divider unit ensures equal flow across every shakers in order to achieve high efficiency

GNZJ594E-2S12N Mud Cleaner

Two of 10” Desander hydrocyclone (1000 GPM capacity) are mounted on the top of GN 4 panel shale shaker

Twelve of 4” Desilter hydrocyclone (1000 GPM capacity) are mounted on the top of GN 4 panel shale shaker

Vacuum fluids GNZCQ270A Degasser (1200 GPM capacity and self-absorption) maximum separating the dangerous gas from drilling fluids

GN 8x6x11 centrifugal feed pumps (75 HP, 1200 RPM motors) transfer the fluids to mud cleaner unit

GNLW453 middle speed decanter centrifuge recoveries the barite to reuse in the active drilling fluids. GNLW363 high speed decanter centrifuge is capable of removing the fine and ultra-fine solids in the drilling fluids

Vertical cuttings dryer is an environmental friendly unit to recovery the drilling cuttings.

GN Solids Control would like to offer the more drilling fluids recycle solution for your project. Please feel free to contact with us.

 Related Arciels:

• GN 1500GPM Dredging Slurry Separation System
• GN Decanter Centrifuges Utilized in Nigeria
• Design of shale shaker and process of manufacture 
• GN has been ready for the slower grow of oil in 2015
• A European Client Just Repeated an Order for 3 More Sets of 1000HP Mud System

GN Vacuum Degasser, Efficient and Economic Solution

In the complete solids control system for the drilling rigs used in oil and gas field, there is an important equipment designed between the shale shaker and the hydrocyclones, which is not the treating equipment, but it is used to help the treating and protection the operators and the efficiency of the complete separation process. It is Degasser, used for discharge the gas bubbles in the drilling mud.
It is located behind the shaker, because the drilling mud fed to the shaker is directly from the well, and such drilling mud contains lot of bubbles, during being treated by the shaker, some bubbles may deleted themselves, and meanwhile, new bubbles may emerge on the shale shaker step. After the shale shaker, the following equipments all need feeding pumps, especially centrifugal pumps. The drilling mud containing the gas bubbles may harm the centrifugal pump, or at least, deduct the efficiency of the pump.
What kinds of Degassers is popular?
Mainly there are two types of Degassers, one kind is designed and provided by US or European companies, they are efficient and welcomed by many end-users in the oil and gas field solids control systems. But they have a clear shortcoming, that it consumes a large amount of electricity, because it needs a large power centrifugal pump for feeding.
In order to avoid the above mentioned shortcoming, Chinese manufacturers designed another kind of degasser, which is vacuum degasser, by using the vacuum sucking force, it could be a  self contain unit and sucks the drilling mud in and do the degassing work. It is as efficient as the US and European ones.

What’s GN’s Advantages?
As the TOP solids control company in China, GN is professional in all solids control equipments not only the vacuum degassers but also all related equipments, including the shaker, degasser and desilter. GN is far ahead of other Chinese suppliers and are competing with USA and European solids control suppliers in many field, including the US market and in Houston. For more information, welcome to visit our American branch website.

Related Arciels:

• GN TBM Flocculation System
• Define Explosion Proof
• Reasons of Shaker Screen Failure
• Solids Control Liquid Mud Plant (LMP)
• GN Double Deck Mud Cleaner Utilized in Complete TBM System

Mud System Checklist

One of our customers does micro tunneling, and bought a TBM mud system from us. Which consists of double deck shale shaker, desander with under shaker, flocculant unit, and decanter centrifuge.

Here's some checklist, which they concern about.

-        Primary hose and pipes to Flocculant Unit, slurry pump and centrifuge done?

-        Flowmeter (Slurry + Flocculant) reference to electric cabinet and modifying while running with water checked / designed?

(Configurations need to be just like seen on Flowmeters as well as on the PLC)

-        Just how much is being released from the dosing screw each minute?

-        will the flocculant Unit fixed be on the ground?

-        Has got the centrifuge ever run with water at 110 m3/h and pair of.500 revolutions per minute and greatest possible differential speed?

-        will the Ac be installed?

-        will the drain hole be designed for the overflow from the Flocculant Unit?

-       will the PLC screens be enhanced in language? The dimensions (m3/h and l/h) are ok now on the sides?

(I have no screen shots to see if ok)

-    The container ft, the hand railing and steps are marked (where you can place what)

-    The title from the devices is already colored around the containers?

-    The motor for that flocculant pump showed up and it has been built in?

-    The release from the flocculant unit has already been associated with the flocculant pump?

-    The sunshine switch is switched 90o right (connection cable vertical rather than horizontal)

-    Switch for Ac? It ought to be placed close to the light switch.

Whenever you consider the equipment, you've got to be thinking, if this sounds like furniture in my home, am I going to pay? Then more engineering thinking comes, to create all of the mud system much more comfortable