drilling waste management

Water based
drilling mud and oil based drilling fluids are applied together for one land
drilling rig because of the various purpose of the drilling. One package of
drilling waste management or drilling cuttings disposal unit which be used for
both water based drilling cuttings and oil based drilling cuttings are very helpful
for the drilling rigs, it can less the cost for the drilling waste management
system and reduce the space to locate the system, so that you can reduce your total
cost of drilling and ensure to comply with the requirement of environmental
solutions.

Last
week we went to the jobsite of a CNPC drilling rig to check the performance of
our drilling waste management system working with water based drilling
cuttings. The discharged mud from the decanter centrifuge is dry enough and
make the clients satisfied with the result. The system is a modular drilling
waste management system
which can be divided into several modulars.

(1)   
Vertical cuttings dryer system :

Including
GNCD930C-VFD vertical cuttings dryer with telescopic skid and the flushing pump
on the skid, the VFD control panel are installed besides the skid, there are a
dry cuttings collection box on the skid.

(2)   
Cuttings transferring system

Including
screw conveyor to transfer the dry material to the top of the vertical cuttings
dryer and cuttings pump to transfer the wet material with much fluids by the
hose to the cuttings dryer. There are a pressure unit on the skid to provide
positive pressure of the VFD control panels.

(3)   
Fluids storage tank

Including
a Cylindrical type tank with mud agitator on top to collect the clean fluids
from the vertical cuttings dryer and a submersible slurry pump to transfer the
fluids to the high-G dryer.

(4)   
High G dryer system

Including
high-G dryer shaker with a catch tank on the bottom to less the solids content
of the fluids discharged from the cuttings dryer and make the decanter
centrifuge working better.

(5)   
Decanter centrifuge system

Including GNLW363CG-VFD decanter centrifuge on the
high telescopic skid and long solids discharge slot, and the clean fluids will
flow back to the solids control system storage tank for reuse.

Oil sludge
waste stabilization and solidification unit is a customized system to improve
pollutant retention and give the material obtained a certain structural
durability. Their objective is thus not to achieve a simple cladding of the
contaminated material in an inert matrix, but a complex physical-chemical
process to obtain stabilization and solidification of the pollutants.

Why use stabilization
and solidification unit for oil sludge waste?

Oil sludge
waste come from different ways, like drilling waste storage tank/ pit/ lagoon,
tank bottom cleaning, cuttings separated from drilling waste management system,
solids control system, etc. The oil sludge waste should be proper disposal to
prevent the destroy of environment. The trend of drilling is no-pit drilling in
the future along with the much more strict environmental laws in most of the
countries, which is combination of drilling mud solids control system plus
cuttings transferring system, drilling cuttings treatment system, cuttings
disposal system. GN customized designed cuttings solidification/ stabilization
unit and TDU( thermal desorption unit) are both cuttings disposal methods.

The main
components of GN stabilization/ solidification unit:

1 Absorber conveyor

2 Cement Conveyor

3 Solidsfication Mixer

4 oil
sludge waste collection hopper

5 cement
storage box

6 skid,
handrails, stairs

Working process of GN stabilization/
solidification unit:

(1)Oil
sludge waste collection hopper collects all the drill cuttings & oil sludge
waste, transported to the mixing chamber by the screw conveyor.
2) Cement storage box is keeping cements powder, through the tubular screw
conveyor, powders are sent to the mixer at pre-set capacity.
3) In the same way, absorber is kept in a box, then sent to the mixer by tubular
screw conveyor.
4) The high-shear mixer mixes all the material, and push to the front at the
same time.

If you have questions for the working process and additive
agents for the solidification/ stabilization unit , pls contact with GN solids
control
.

The solidification unit and thermal desorption unit,
as one of the most efficient and economic drilling waste disposal method, has
been widely required by drilling waste management companies. GN new developed solidification
unit has been shipped to domestic client for no-pit drilling together with our
hi-G dryer system.

We have developed different customized drilling waste
management system for both water based drilling cuttings and oil based mud
& synthetic based mud.

For example:

(1)  
Vertical cuttings
dryer
+decanter centrifuge with telescopic skid and small tank

(2)  
HI-G dryer
shaker+ decanter centrifuge for water based mud with mud tank

But the cuttings discharged from the vertical cuttings
dryer system, decanter centrifuge or hi-G dryer system is still a problem, they
are improper to be re-use, or disposal directly or difficult to be treated or
transported, because of the constituents of the cuttings are not proper for
land application or burial approaches. That is why GN will develop our own solidification
unit and thermal desorption unit to provide our clients a complete drilling
waste disposal solution for no-pit drilling.

The configuration of solidification unit as below:

1 ea cuttings hopper
with 5cbm capacity

1 ea cuttings
transfer screw conveyor with 7.5kw motor

1 ea SS304 steel
Absorber transfer screw conveyor with 1.1kw motor

1 ea SS304 steel
cement transfer screw conveyor with 1.1kw motor

1 ea SS304 Steel
solidification mixer with 2 reverse rotation screw impeller with 11kw motor

Various materials can be added to cuttings to solidify
and stabilize them, to get more details of GN solidification unit, pls contact
our sales.

As the most professional manufacturer of drilling
waste management system
, GN solids control has provide a lot of drilling
cuttings treatment system for drilling companies, like CNPC, Sinopec,
especially in 2015, after Chinese government enact new laws for the drilling
waste disposal.

GN decanter
centrifuge
can be applied to both oil based mud and invert drilling fluids, and
water based drilling fluids and Synthetic Based mud.

INVERT
drilling fluids are generally used where drilling problems not easily handled
by water-based fluids are expected, or in situations where the invert drilling
fluid is more economical. The major advantage offered by invert fluids is
increased borehole stability.

Invert emulsion
fluid decanter centrifuge models:

GN centrifuge
applications:

1)     
Oil
sludge waste treatment with polymer mixing unit as dewatering unit, pls check
the working videos for COSL from here: http://www.gnsolidscontrol.com/video/oil-sludge-waste-treated-by-gn-centrifuge-with-chemical-for-cosl

2)     
Water
based drilling waste management for Sinopec, pls check the working video from
here: 
http://www.gnsolidscontrol.com/video/gn-wbm-waste-management-unit-working-for-sinopec-in-wushenqi-inner-mongolia 

3)     
Closed
loop drilling waste management system together with GN solids control system
and vertical cuttings dryer: http://www.gnsolidscontrol.com/drilling-fluids/another-two-sets-closed-loop-waste-management-system-for-domestic-oilfield-in-2015

4)     
VFD
decanter centrifuge for no pit drilling together with Hi-G shaker, http://www.gnsolidscontrol.com/drilling-fluids/gn-centrifuge-high-g-dryer-cnpc

To Serve our
clients better, GN solids control keep our main equipments in stock , including
different sizes decanter centrifuge, vertical cuttings dryer, hi-G drying
shaker, shale shaker, mud cleaner, economy mud cleaning system, etc.

GN vertical
cuttings dryer can be used for both water based mud and oil based mud, we are
the first China solids control equipments manufacturer who firstly designed
such multi functional vertical cuttings dryer and firstly field proved for
drilling waste management. Our unique air knife design can avoid the screen
basket blocking for water based drilling cuttings.

If you need
customized invert drilling fluids decanter centrifuge system, pls contact GN
solids control.

GN
Solids America
will attend one of the largest oil show in North America-Global
Petroleum Show in Calgary, the general information is as below:

  • Oil Show Name: Global Petroleum Show (GPS)
  • Schedule: June 9 – 11, 2015
  • GN Booth No.: Hall F – Booth 8503
  • Displayed Products: GNLW553-VFD Decanter Centrifuge

What
we will show at GPS?

GNLW553-VFD(
comply with CSA certificates) decanter centrifuge for sale applied for oil
& gas drilling solids control, zero discharge drilling waste management
system
, mud dewatering unit

The
main technical specs:

Bowl
Diameter: 22 inch (550mm)
Bowl Length:71inch(1800mm)
Speed: 0 -2500RPM
Typical Capacity: 400 GPM
Main Motor: 90KW
Back Drive Motor: 37KW

Max
G force: 2719

All
the electrical motors and control system comply with CSA explosion proof for
using in Canada. This is the biggest centrifuge model during our production
line, and one of our star-products. Our big bowl centrifuge has been used for
Tunneling dewatering unit, oil drilling, dredging slurry separation idustry. If
you are interested in this big bowl, big volume decanter centrifuge, pls meet
GN Solids America at GPS.

The
centrifuge bowl main material is made of duplex stainless steel 2205, and the
other components are made of stainless steel 316, the bearing is from SKF, the
auger protection is tungsten carbide tiles over 4mm.

We
just finish the largest oil show in North America-OTC on May 7th, we showed the
most advanced vertical cuttings dryer, 14inch bowl decanter centrifuge, mud
cleaner at OTC. We win a lot of concerns from the drilling waste management
contractors. 14inch bowl decanter centrifuge is our the most popular model
during production lines, GNLW363CG centrifuge has been field test approved and
at the beginning of 2015, we sold over 40 units one time to our cooperation
partner in Africa for mud service.