Drilling Mud Recycling System

Just several day ago, a GNMS-1000D slurry
unit was carefully commissioned in GN factory yard and are delivered to loading
port for exporting to a worldwide famous company, this is a repeated order from
that company and GN Solids Control is their first China supplier. At first,
before the first order, they doubted China supplier’s quality and capability
for machinery, and before that, they had been using the German machines only.

They laid the first order as a trial and matched
the purchased slurry unit with their German boring machine, the performance and
efficiency is satisfied and the end user chose to repeat the order for a second
exactly same slurry unit.

This is a compact treating unit for instant
treating alongside the boring machine and there is no much storage space for
this slurry unit. Therefore the treating efficiency and suitable mesh numbers
are very important.

In order to avoid leaking of mud, there are
several points to be noticed:

1. end user must choose suitable mesh
number of screens. Normally, we recommend mesh 25 on the bottom deck of shaker
while mesh 40 on the upper deck of shaker. In case the mud has different
conditions, the end user could change mesh number into mesh 10 and mesh 40
instead.

2. suitable angle of shaker deck. GNZS
series shake shaker could change the shaker deck’s angle easily. Depending on
the mud condition and jobsite need, the shaker deck could be changed from minus
1 degree to 5 degree.

3. a proper G-force for the vibrating motors
is also a key factor for the treating performance. GN uses Oil vibrating
motors, and the vibrating G force could be adjusted by changing the position of
the 2 motors’ eccentric blocks.

                                                                                                                                                                                                                                                        Besides this capacity, GN also have
150/200GPM system, 350/500 GPM system and 1000 GPM System for option, all of
which has mixing unit included. GN also has economic options mostly for TBM
drilling works, without the mixing unit.

�-��Nx

Right now, one piece of news in the front
pages of many countries main media is about the meeting between the US
president and China president. China issued a large order to Boeing, the most
famous air plane manufacturer in USA and also in the world.

Unless last time China leader visited USA,
when he brought with him mostly the national owned giant companies from China,
this time President Xi is taking with him some private owned companies. Or,
majority of those companies are private owned.

This is also the trend of nowadays China’s
economy, the private owned companies are playing more and more important roles
than before. Even before President Xi’s visit to USA, many good and promising
Chinese private owned companies have entered to US market. As an open market,
US gives fair opportunities to Chinese companies.

GN Solids Control is one of those Chinese
companies. As a 100% private owned company, it’s not easy for GN Solids Control
to get a share of oil and gas drilling solids control and waste management
system market. But with its high quality products and reassured services, GN
has got to the second to none position of the solids control industry in China.
And also, GN Solids America, the USA branch company of GN Solids Control,
China, became the first USA based China solids control company.

Not only this, GN Solids Control is also
the first China solids control company which is certified by API, DNV CE and
Russia TC& TP certificates. Besides those, GN also have HSE standards and
certificates, for caring about the human being’s welfare and environment.

Among all the solids control manufacturers
in China, GN is not the largest one in size, and neither the oldest one in
history. But it is now regarded as the most well known brand in China and one
of the most famous ones in the world. We have reason to believe, it would do
better.

Right now, right
there, there are 2 engineers from GN Solids Control working on drilling jobsite
of a North Africa drilling company for first time commissioning and training
for the operators for GN mud plant and waste management systems.

This is an old
client of GN Solids Control and this client have been buying from GN for more
than 2 years. They have purchased from GN for many orders including

1. Complete
solids control systems including shale shaker, mud cleaner, middle speed
decanter centrifuges, high speed decanter centrifuges and other auxiliary
equipments like sand pumps, submersible slurry pumps, mud agitator and mud
guns.

2. complete waste
management systems including the decanter centrifuges, vertical cuttings
dryers, high G shale shakers for drying and screw conveyors for transporting
the materials. This African company has bought from GN Solids Control more than
10 sets of decanter centrifuges including fixed speed ones and vfd controlled
ones.

3. other systems
like mud mixing plant.

For this time of
commissioning, GN engineer is servicing for 1 mud plant with 7 tanks, for each
tank there are 4 sets of mud guns and 4 sets of mud agitators. One of the tanks
is used for mixing, equipped with jet mud mixing hoppers, and a hoist for
lifting the chemicals up over the hoppers on skid of tank.

After the commissioning
of the mud plant, GN engineers would go to 3 drilling rig jobsites for starting
the vertical cuttings dryer GNCD930C respectively. GN Vertical cuttings dryers
have following features comparing with its peers from other suppliers:

1. GNCD930C
vertical cuttings dryer is suitable for both OBM and WBM. Other brands’ are mostly
for OBM only.

2. well
performance proved by many end users on jobsite.

3. both fixed
speed and vfd controlled available for options.

In a complete
drilling rig system, there is a solids control system which is used for
separate out the drilling cuttings from the drilling liquid which comes back
from the drilling wellhead. And with this solids control system, the drilling
cuttings are to the most separated out from the liquid, and after adding some
necessary chemicals into the clean liquid, the drilling mud goes back to the drilling
system. It is considered as a closed loop of drilling.

But you may ask,
how to deal with the drilling cuttings discharged from the shale shaker, mud
cleaner, desander, desilter and the centrifuge? Will the drilling cuttings
damage the soil or land of the environment?

And what to do
with the drilling liquid after it serves for several drilling rigs? Is it
possible that all the drilling cuttings are fully separated out? Is it possible
there are smaller and finer particles in the liquid?

GN has answers
for those questions by using the waste management systems.

According to
their different function, the waste management could be divided as below:

1. the waste management
for further treating the drilling cuttings from the upper hand solids control
system. GN has several standard designed options for these waste management
systems. Normally, a screw conveyor collects and transfer the drilling cuttings
to the vertical cuttings dryer, the liquid discharged by the cuttings dryer
flows into a conserve tank of something alike to be transferred to decanter centrifuge
with a high speed. Both the solids discharged from the cuttings dryer and the
centrifuge are very dry. And liquid could enter to solids control system.

2. after the
drilling cuttings waste management system, the very dry cuttings could enter GN
newly designed solidification unit for final discharge.

3. for the
drilling fluids, GN provide dewatering unit and high speed decanter centrifuge,
after some time operation, the particles become extra fine in the liquid, need
some chemical to merge them to be big enough for centrifuge separation.

A solids control
system for a drilling rig is the recycling system for the drilling liquid. But
during the recycling procedure, in order to ensure the performance of drilling
mud, there are continuously drilling cuttings to be separated out from the
drilling liquid and discharged. How to deal with the drilling cuttings, how to
discharge the waste without harming the environment, they are the question for
the drilling waste cuttings.

At this time, the
drilling cuttings still have some drilling mud on them, if discharged directly,
there are two problems: one is that the drilling mud is containing a lot of
chemicals which may pollute the soil and ground. The soil polluted by drilling
mud could be barren for more than 100 years. The other is that, the drilling
mud is valuable, better recover as much as possible to save the cost.

In order to solve
this problem, the engineers and professionals find below solutions:

1. drilling
cuttings discharged by solids control system is collected by screw conveyor to
the waste management system, to the first equipment, like in a standard GN
Waste Management System GNDC-40A system, it is a vertical cuttings dryer
GNCD930D, which is the 4^th generation vertical cuttings dryer GN
designed and developed. This vertical cuttings dryer functions like a big
washing machine and helps to dry the cuttings. The liquid part falls down to a
tank and liquid in the tank waiting for being treated by a decanter centrifuge.
GNLW363CG-VFD is always an ideal high speed centrifuge to further treat the
mud, it is used to separate out the extra fine particles, and the drilling
liquid, very clean liquid falls directly back into the drilling system.

2. now how are
the drilling cuttings? yes, they are dry, but still not ready to be discharged.
GN is the first solids control manufacturer in China to design and produce a
set of solidification unit. That is used to make the drilling cuttings into
cakes and safe to be discharged.

If you have
interest in those technology or equipment, welcome to contact us freely.