Drilling waste management is a hot topic these years with global attention to environmental protection, especially in Oil & gas industry. Drilling waste management into environment without any treatment is strictly forbidden. So before disposal, a series methods must be introduced to treat the cuttings and make it reach to disposal standard.
Drilling waste is produced as the rock is broken by the drill bit advancing through the rock or soil; the cuttings are usually carried to the surface by drilling fluid circulating up from the drill bit by rotary, percussion, or auger methods. The drilling waste is commonly examined to make a record (a well log) of the subsurface materials penetrated at various depths.
In the oil and gas industry, this is often called a mud log. One drilling method that does not produce drilling waste is core drilling, which instead produces solid cylinders of rock or soil. In cable-tool drilling, the drilling waste is periodically bailed out of the bottom of the hole. In auger drilling, drilling waste is carried to the surface on the auger flights.
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| H-G Dryer |
In the past, human has less attention to environment protection. The drilling waste, after solid control system, usually directly disposed to pit and then land-filled near drilling field. This method is commonly named Burial. However, land-filled usually results in anaerobic conditions, which limits any further degradation when compared with drilling waste that is land-farmed or land-spread, where aerobic conditions predominate.
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| Vertical Cuttings Dryer |
It may be necessary to follow steps to ensure the hydrocarbon and chloride content is lowered within the governing bodies standards before reusing or recycle the drilling waste.
Here KOSUN drilling waste management equipment, such as vertical cuttings dryer, auger, h-g dryer, centrifuge are introduced to prevent environment pollution. This process allows the circulating fluid return to the drilling process for recycle, while drilling waste is then studied by mud engineers and well loggers before proper disposal for further value realization.
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