gnadmin – Page 81 – Drilling Mud Recycling System

How to Choose a Suitable Screw Conveyor

A screw conveyor is also called
as auger, because of the screw inside the long case used for transporting the
material from one place to another, it is called screw conveyor. It is common
equipment used in oil and gas drilling solids control system and waste
management systems, but among many suppliers, how to choose a suitable screw
conveyor for your project?

What factors should be
considered when choosing an Auger/ Screw Convyor?

1. HSE is always the first
factor to consider for a responsible client. The design of the screw conveyor /auger
is human oriented or not is very important. Are all rotating parts well
covered? Do the screw conveyors /augers have the protecting cover? GN Solids
Control is a company who is HSE certified and GN’s auger is accepted by many
international famous companies who have strict HSE standards.

2. the material used for the screw
conveyors /augers, especially the impeller. Because the drilling cuttings are
of highly hardness, and they may easily damage the impeller if the impeller is
not strong enough. GNSC series screw conveyors /augers use 16 Mn as impeller
material.

3. the flexibility when using
the screw conveyors /augers. Because the layout of each project is not the
same, the client or end users have to re-arrange the existing equipment a bit
to the requests of each project. If the distance is not same, which is always
the cases, they need to reduce or add the screw conveyors. GNSC series screw
conveyors could meet such demand easily because GN’s screw conveyors are
designed as 12ft long for each section, and the first section is with the motor
while the last one has the gearbox, besides those 2 sections, other middle
sections could be easily interchangeable. It means, you can use more or less
sections of conveyors to achieve different requested distances.

For more information, please
visit GN website:

Mud Solids Control System to Southeast Asia Customer

The
solids control system could eliminate the large solid particles within the
drilling mud to reduce the particular solids content so that to guard the
transferring pump which used to transfer the mud back the rig with regard to
reusing. GN just done one set mud solids control system with VFD
decanter centrifuge for gold mining project in Southeast Okazaki, japan.
This system is a 3 stages separation design model; the equipment configuration
is as beneath:
1 . Shale shaker unit GNZS594E-HB used for coarse strong particle separation.
This shale shaker unit could also be employed as a high G pressure drying
shaker with variable G force up to 7. 4-panel screen makes a bigger area
for drying the actual drilling mud.
2 . VFD design decanter centrifuge device used for fine solids splitting up.
The first one unit centrifuge goes at a middle speed to eliminate most of the
solids to reduce the particular gravity. The following second system VFD
control centrifuge might run at a high speed to get rid of the ultra fine solids
to make the drilling mud
cleaner.

3. Screw pump set up to transfer the mud to the centrifuge. Horizontally put in
at the flank of the tank, it helps to tank leading more space for operation
mobility.
4. Mud catching tank
used as sand snare and active mud safe-keeping.
This system is to get rid of the solid particles in the going mud to make the
drilling essential fluids reuse. After the solids currently being removed, the
fluids may be pumped back for recycle and the pump would be
additionally protected as there are less solids particles.
Mud solids control system is very common merchandise and solution that GN
provides. For this purpose, GN might provide separation system intended for oil
drilling, no drill down drilling project and some different industrial solid
and chemical phase separation. For more information, delightful send us email
or even call with no hesitate.

GNGH Solidification System for Africa

In the
past several years, each year, GN Solids Control brought to the oil and gas
industry some new and useful solutions for bettering the world. Year 2013, the
new design of decanter centrifuge, with two motors on one side and positive
pressurized control panel, year 2014, the improved vertical cuttings dryer
which could be used for both OBM and WBM, year 2015, a new solution GNGH10 and
GNGN15 was designed and put into use, it is the final treatment of the drilling
cuttings.

Until
now, since the first set of GNGH10 Solidification unit was finished in GN
Solids Control’s yard and transported to the client’s place in domestic China,
GN has sold several of that. and some of GN old clients who are satisfied with
GNLW series decanter centrifuges and GN solids control systems are considering
to use the solidification unit in near future. This solidification unit is purchased
by a client from French and this is for his project in Africa. Recently, lots
of African countries came to aware of the necessary to protect the environment
from being polluted by the drilling cuttings.

What is
solidification unit?

The
solidification unit is used for future treating the solids discharge from the
solids control system’s desander and desilter cones and the centrifuge of the
solids control system. Also, the solids phase discharged by the shale shaker
could enter the solidification unit after being treated by the GNCM waste
management system. By using material like cement and other material, the
liquidate component in the drilling cuttings which may permeate into the soil
or underground water are forged into some hard particles and become less
liquidate. Then they could be used in some other ways like building the road or
so.

In a
word, the solidification unit is an economic and practical solution for waste
management of drilling solids cuttings.

Containerized Dewatering Unit

The coagulation and flocculation unit
(hereinafter referred to as the CFU) is intended to serve as the mobile
unit for centrifuges chemical improvement while the drilling mud cleaning
(extraction of “process water” non-combined solvent and removal of the “drilled
solids, solid and dissolved chemical reagent” solids from the mud by
preliminary chemical treatment of the mud and subsequent phase separation in
the centrifuge).

The GNDU2000 Series 20FT Dewatering Unit
provides a process of chemically enhanced configuration to remove the fine
solids less than 5 microns from the water based drilling fluids. As it known
that traditional solids control equipments like shale
shaker, desander,desilter,
and decanter
centrifuge will removes solids upper than 5 microns, for colloidal-size
particles which is less than 5 microns will build up in the drilling mud
system. To maintain the drilling mud properties, the operators have to dilute
the drilling fluids with water, this consumes more water and create more
drilling waste.

The mud to be cleaned is supplied from mud tanks to the
station by the centrifuge feeding pumps. The mixing device (mixer) is installed
inside the CFU. The CFU process equipment perform the mud mixing (dosing) with
chemical reagents in the mixer, then the mud is fed from the CFU to the
centrifuges. Centrate (process water) obtained in the centrifuges returns to
the CFU, and solids contained in the mud are removed by the centrifuge and
transferred into the sludge transporter. Centrate (water) is measured in the
CFU and if its parameters are satisfactory, the station pumps transfer it into
the tank (receiving tank) for the new mud mixing. If results are not
satisfactory, the centrate is pumped into the sludge transporter.

Mud and water are delivered and discharged
from the CFU by flexible hoses. The water supply system shall provide water
flow rate of approximately 3 m3/h for mixing in tanks. Centrate overflow,
centrate output to the storage vessels, centrate output to the control vessel,
water input/output, mud input to cleaning shall be designed with quick-release
couplings DN50 and shall be located in the same port on the CFU outer wall. The
port is covered by cover with padlock. 50 meters of flexible hoses are included
into the scope of delivery. Centrate is fed into the centrifuged water tank by
DN150 pipeline. Pipeline inside the CFU is made of constructional carbon steel.
Flange and gooseneck outside the CFU is made of constructional steel and
intended for centrate feeding from two centrifuges. The flexible hose DN150
delivers centrate. 10 meters of flexible hoses are included into the scope of
delivery. All quick-release couplings, flanges, bolts, goosenecks shall be
included into the scope of delivery also.

GN has re-designed the GNCD930 Vertical cuttings Dryer

Given that GN Solids Control first of all
designed the first generation GNCD 930 Vertical Cuttings Electric dryers, this
model has been created to the 4th generation, every generation has clear
strengths comparing with its ancestors. GN engineers added new purposes and
made improvements to them. Right now GN has updated this to GNCD930D/D-VFD
vertical cuttings dryers.
1st generation GNCD930 Vertical cuttings
dryer, it offers the basic functions as every single vertical cuttings
dryer, similar to a washing machine’s drying perform, by rotating at a top
speed, the liquids and hues are separated from the other person and the solids
particles are generally dried to fall down and also discharged, the liquid is
definitely transported to next step.
next generation GNCD930 Vertical clippings dryer, GN changed the actual some
parts to have higher efficiency like the solids blocking wedding ring and some
scrapers to speed the discharge of material and as well better the performance.
Almost all of the ideas came from the construction site feedbacks from GN
useful clients.

3rd generation GNCD930C Vertical cuttings dryer, GN has great improvements. For
your main equipment, GN superior the material of screen holder and its
structure, and added in air knife to help keeping away from block. For control
individual panels, the clients could opt for the fixed speed one or good
pressurized VFD
control panel having PLC smart screen. Intended for rotating speed, GN
possesses 900RPM and 1200RPM offered.
Such useful applications manufactured GNCD930C Vertical cuttings clothes dryer
more efficient and favorable.

Today, not long ago, GN has re-designed the GNCD930 Vertical Waste Dryer, we
can say that, it’s the 4th generation vertical waste dryer. For each model, you
will find 2 optional electric command panels as fixed velocity and VFD
controlled to decide from, And also, you can choose ideal speed per your work
site need, as 900 RPM or 1200 RPM. Contrasting with the 3rd generation, the
particular structure is more compact.
In case you have more interest or wish to see GNCD930 Vertical clippings dryer,
welcome to come to GN factory or contact GN sales at
renee@gnsolidcontrol. com.