drilling cuttings

There are 2 main sources of drill solids
particles are the chemical additives and formal drilling cuttings, the drilling
cuttings are containments that degrade the performance of drilling mud. The
drilling particles will be ground into smaller and smaller and become more and
more difficult to remove from drilling mud if the drilling cuttings that not removed as per guide. Most of the
formal drill solids will be able to be removed by mechanical ways by drill
solids separate equipment and small drill particle will be very difficult to
remove and will have a great effect on drilling mud properties than the very
larger drill solids particles . The solids particle size in drilling mud
incorporated into drill mud will be range from 1 to 250 microns.

 The clay, colloidal and bentonizte will be
size between 1 to 5 microns, silt, barites and fine cement dust will be 6 to 44
microns, fine sand will be between 44 to 74 microns, API sand will be 105 to
149 microns, coarse sand can be 500 – 1000 microns, coarse that larger than
2000 microns, there will be colloidal that bellow 2 microns.

Drilling solids particles are the main contaminant
in the drilling mud, so the control of the importance of the good solids
control including increased the penetration rate and reduce mud cost, reduce
water requirement, reduce mixing problem, reduce differential striking, etc.
The drilling solids removal is important to keep drilling mud recycling and re-use.
The
main equipment for drill solids removal
are shale shaker , desander, desilter, decanter centrifuge and there will be other
machine assistant to meet separation application including mud tank, centrifugal pump, valve and pipeline.

mud system is primarily used for oil & gas drilling fluids circulation, horizontal directional drilling ( HDD ) fluids recycling, underground drilling mud recycling, geothermal drilling, dredged fluids or slurry separation, mining, coal exploration drilling, water well drilling and more. Solid phase in solids control, can be divided into two categories according to its functions. Useful solid phase, such as bentonite, chemical agent, etc. Another kind is the harmful solid phase, such as drilling cuttings, sand, etc. The so-called drilling mud solids control program is to get rid of the harmful solid phase, keep the useful solid phase, in order to meet the performance of the drilling mud. Generally, we call it solids control.

Drilling mud recycling technique for the is consisted of mud tank, shale shaker, vacuum degasser, desander, desilter, and decanter centrifuge, feeding pumps, etc. Shale shaker is employed to separate the big solids with diameter above 75μm, and 45~74μm for desander, and 15~44μm for desilter, decanter centrifuge is utilised in separating suspension of solid phase with particle diameter≥2μm for drilling mud and fluids handling. In addition to shakers and hydrocyclones, the application of a high-speed centrifuge has significantly contributed to the ability of a drilling operation to reduce the amount of mud to be built and diesel/barite additions to maintain optimum low and high gravity solids proportions. Sometimes desander & desilter are combined as highly efficient mud cleaner. When air enters the drilling fluids, vacuum degasser is applied to separate the air. If no air is found in the mud, the degasser will work as a big agitator. All these equipment are mounted on the top of the mud tank. After separating the solids, the clean mud will be pumped into the borehole again.

Drilling Mud and Mobile Solids Control System
With no doubt, GN is a pioneer and professional in this industry and field of China. Except the excellent solids control equipment, such shale shaker, decanter centrifuge, etc., GN can also provide the whole solids control technique of higher quality than the other companies. GN Solids Control Program can be applied to almost all kinds of regions such as polar areas and tropical regions.

Trial Testing of GN Vacuum Degasser for your reference,more GN item:

Compact GN Drilling Mud Agitator for Piling:http://mudagitator.wordpress.com/2014/08/09/compact-gn-drilling-mud-agitator-for-piling/