desilter

Screw
conveyor
is widely used for oil & gas drilling zero discharge drilling
waste management system, the purpose is to collect and move semi-solids
materials, so you can save a lot of labors and more efficient to deal with the
drilling cuttings which should be cleaned and handling before discharge.

Installation
of screw conveyor in the drilling waste management system:

Normally
it is installed horizontally and at a slight incline which is supported by a
customized steel frame according to the distance to the vertical cuttings
dryer, but the angle is normally less than 45 degree. Too incline angle will
influence the moving efficiency of the screw conveyor.

Structure
of Screw conveyor

It
consists of a trough or tube containing either a spiral blade coiled around a
shaft, driven at one end and held at the other, or a “shaftless
spiral”, driven at one end and free at the other. Variable frequency
electric motor can be used to provide a variable speed, which is for the
different drilling cuttings conditions and required moving rate.

The
solids discharge end could be customized design according to the rigsite’s
layout, side discharge or bottom discharge.

GN
solids control
standard screw conveyor

There
is hopper opening screw conveyor which is usually used to collect the cuttings
from the shale shaker, desander, desilter, decanter centrifuge. And others are
closed cover screw conveyor, and outside the U-type trough, you can choose with
the frame support or without.

We have screw diameter of 12inch, 14inch,
16inch, 18 inch for option, and the screw conveyor length is divided to
different sections, each section is connected by the bearings, each section is
standard 12ft, you can choose 2 section( 24ft), 3 sections (36ft) or 4
sections(48ft).

Auger
is developed as a traditional drill cuttings transferring method, more and more
people choose cuttings pump or vacuum unit to replace it.

Drilling
mud serve as lubricant that keep the drilling bit operate smooth.  The consequence of drill bit overworked by
temperature heading up will lead to hard work of engine and transmission that
lead to breakdown and halt the whole operation.
It is a very costly operation halt that leads cost of extra ten thousand
of dollars and more. Plus, the drilling fluid is also a very costly lubricant
and to keep the drilling cost under control, solids control machinery is need
for filter the debris that contain in the drilling mud for many times of cycle
of use the drilling mud.  The five
machinery that will completely perform filter the solids from the drilling mud
are shale shaker, vacuum degasser, desander, desilter and
decanter centrifuge.

The filter step goes in below:

Shale
shaker

The
drilling mud feed enter the feeding box of shale
shaker
.  The mud
contains various size of the solids return to the ground surface and shale
shaker is filtering the biggest solid by use high G force of shaking.  The box of shale shaker contain panels of
mesh screen that is different number of mesh depend on solids contents analyze
by drilling mud engineer

Vacuum
degasser

. The muds
that return to ground surface not only contain solids but also gas from the
earth core.  This gas that change density
of drilling mud leads result change the viscosity of drilling mud. Vacuum degasser
removes the gas in the drilling mud to keep the mud in balance and continue the
future solids filter process.

Desander

The drilling fluids now that
contain medium size solids enter the liquid feeding pump and enter the
desander
, which contain large hydrocyclone(s).  The solids diameter above 40-60um will be
filtered and bottom of desander is pair with shale shaker contain finer mesh
compare with first shale shaker to complete the filtering.  T

Desilter

This machinery’s function of
work is just as same like desander in last step before. It contains multiple
smaller hydrocyclones that can remove solids that measure diameter above
15-40um.  It is also pair with shale
shaker like desander and complete this step of filtering.

Decanter Centrifuge

The drilling fluid feed through
centrifugal pump that feed into decanter centrifuge that rotate in High
speed of G force
.  The rotating
bowl will separate solids from the mud and exit in one for solids and other one
is for filtered mud.  The drilling mud
now will feed back to the rig for next cycle of usage.

Drilling waste are consist of drilling cuttings, waste water produced by drilling and oil storage, oily sludge, tank bottom waste, etc. GN vertical G dryer system can be used for all these types of drilling waste with our customized design. We have standard equipments just put them in different layout and use different speed( G force) to get the required result.
Firstly GN vertical cuttings dryer system will separate the oil based drilling cuttings from the materials collected from the rig site both in onshore and offshore, and get the waste water with oil, the oil content remained in the cuttings after treated by GNCD930D-VFD is around 5%, you need to transfer the cuttings to thermal unit to reduce oil content in the cuttings then disposal, otherwise you need drilling waste injection process. For the waste water with oil, a 3-phase decanter centrifuge can help to separate the oil from the waste water, and oil recovery can be re-used for the drilling fluids and save a lot of drilling cost, the waste water can be flocculation and feeding to the water treatment system.Such drilling waste water treatment process can apply both vertical cuttings dryer and decanter centrifuge or both of them, it depends on your budget of the projecct. But you should pay more attention to the solids particle size, it is very fine clay and silt solids, the vertical G dryer can not be applied, the decanter centrifuge is suitable for such situation.
The sudden crude oil price fall down caused the operators want to reduce their production cost, less the equipments’s purchasing value is a good and effective way. GN solids control with GN solids Ameria office and warehouse in Houston, provide service both for sales and rental. We have 10 units 4-panel shale shaker, 5 units of mud cleaner( desander, desilter, shaker 3 en 1), 3 units of high speed decanter centrifuge, 1 set of VFD centrifuge in stock for rental and sales, welcome to contact us at 6710 windfern road, Houston, TX 77040 or visit us at OTC 2015 Reliant Arena Hall, 6137 & 9225-2.

BY 5 December 2014 Uncategorized

Recently we have a lot of projects for geothermal drilling mud recycling system, the particular 2 projects are: 500gpm mud cleaning system to Kenya for geothermal drilling( for more detailed info and photo, pls check our website: http://www.gnsolidscontrol.com/drilling-fluids/gn-500gpm-mud-system-kenya-geothermal-drilling), 1000gpm mud recycling system to Turkey for geothermal drilling, for more info, pls check here: http://www.gnsolidscontrol.com/drilling-fluids/gn-1000gpm-mud-system-turkey-geothermal-drilling).

2 models of shale shakers can be used for Geothermal drilling:

GNZS594E-HB linear motion shale shaker, with 4 panel pre-tentioned shaker screens, mechannical shaker deck adjustment -1 ~+5°with max treating capacity for water 1000gpm, with 2 explosion proof and rain proof vibration motors Italy Oil or US Martin brand, 460/480V/60HZ, 3 phase, 2.5HP. We can make it tandam shale shaker, triple shale shaker for option. And we have pretentioned shaker screens in stock in our Houston warehouse. We also have elliptical motion shale shaker for option.

GNZS703E-HB linear motion shale shaker, with 3-panels steel frame shaker screens, max treating capacity is 528gpm at drilling mud with API40 shaker screens.

Not only the shale shaker, we also provide mud cleaner( desander cone, desilter cone and underflow shale shaker 3 in 1) , feeding pumps, mud tanks, mud agitators, mud mixers, mud guns, etc.

Except for geothermal drilling, GN designed mud recycling system can be workable for all kinds of drilling mud, like coal bed mathane, oil drilling, shale gas drilling( see GN drilling cuttings management system working in Shell’s rig site for shale gas drilling), diamond core drilling, and no-dig industry.

Except for 500gpm/1000gpm mud recycling system, we also design for 250gpm, 200gpm, 350gpm, 500gpm, 800gpm, 1000gpm for all kinds of drilling.

GN solids control linear motion shale shaker has been widely used in Latin America market for such geothermal drilling, and we have 4 shale shakers available of immediate shipment in Houston warehouse, pls check with GN sales at 6710 windfern road, Houston, TX 77040.

GN solids control design and manufacture both barite recovery decanter centrifuge system and liquid mud plant for customized requirement.

Our barite recovery decanter centrifuge model including GNLW452 with 1800rpm and 18inch bowl and GNLW453VFD with 0~2800rpm variable speed , 18inch bowl. These 2 models are commonly used for barite recovery system. But sometimes GNLW363VFD decanter centrifuge is also used for LMP.

Liquid mud plant:

GN solids control already made several complete LMP for our clients, like COSL(China Oilfield Services Limited) for both water based drilling fluids and oil based drilling fluids. That liquid mud plant including 17 sets of standard 40ft container mud tanks(450bbl each mud tank) with necessary mud agitators with JIE Brand gearbox, mud guns with 6.4Mpa high pressure, mud tank accessories and decanter centrifuge with feeding pumps. For more info about this complete liquid mud plant, pls check our website: http://www.gnsolidscontrol.com/drilling-fluids/liquid-mud-plant-lmp-china-oilfield-services-limited-cosl

We ever made a 6 mud tanks liquid mud plant for CNPC division company, with decanter centrifuge GNLW452 with screw pump, mixing hopper, mixing pump, mud agitators,mud gun and charging pump, etc. 

How to design a customized liquid mud plants?

Firstly we need to know the total volume of the LMP, so we can design the mud tank size and we can know the layout of each mud tank, how much bbl each mud tank, and how to fix them in the liquid mud plant.

Secondly we need to know what equipments will be used in LMP, including the mud recycling system, barite recovery centrifuge, high speed decanter centrifuge, pumps, pipelines, mixers, etc.

The mud recycling system including shale shaker, desander, desilter cone, decanter centrifuge, mud tanks, mud agitator, mud gun, mixing hopper, shear pump or mixing pump, etc.

If you need a liquid mud plant for water based drilling fluids or oil based drilling mud, pls contact GN solids America for a professional sales.