The Top Choice for Treating Oilfield Drilling Mud - Decanter Centrifuge

What Does Oilfield Drilling Mud Mean?

The main sources of oilfield drilling mud come from the oil tanks, sink tanks, sewage tanks, bottom mud of grease traps in pick-up stations and joint stations, oil sands and oil mud removed from oil-bearing water treatment facilities in refineries, light hydrocarbon processing plants and natural gas purification devices, landed crude oil and oil-bearing mud produced by drilling, operations, and pipeline perforation. When oil storage tanks store oil products, a small amount of mechanical impurities, sand, mud, heavy metal salts, and heavy oily components such as paraffin and asphaltene are deposited in the bottom of the tank, forming the Tank bottom sludge.

In 3-6 years of regular tank cleaning, the amount of oil-bearing mud at the bottom of the tank accounts for about 1% of the tank capacity. The characteristics of oil-bearing mud at the bottom of the tank are extremely high hydrocarbon (oil) content. According to the investigation and testing, about 25% of the tank bottom mud is water, 5% of inorganic precipitates such as sediment, and about 70% of hydrocarbons, including 7.8% asphaltene, 6% paraffin, and 4.8% mud ash content.

The oil-bearing mud produced in the process of crude oil extraction mainly comes from the mud produced by the surface treatment system, the oil-bearing mud produced in the process of oil recovery sewage treatment, plus the oil-bearing mud composed of the flocs formed by the water purification agent invested in the sewage purification treatment, the scale from the corrosion of equipment and pipelines, and the dead bacteria. This kind of oil-bearing mud is generally characterized by high oil content, high viscosity, fine particles and difficulty in dewatering, etc. It not only affects the quality of crude oil, but also makes it difficult to meet the standards of water quality and effluent discharge.

The oil-bearing mud in oil refineries and wastewater treatment plants mainly comes from the bottom mud of grease trap, flotation pond flotsam and crude oil tank bottom mud, commonly known as "Three Mud ". The composition of these oil-bearing slurries varies, and the oil content is usually between 10% and 50%, and the water content is between 40% and 90%, accompanied by a certain amount of solids. Domestic oil-bearing mud dewatering treatment basically uses decanter centrifuges.

Why Use Decanter Centrifuges to Treat Oilfield Drilling Mud?

It can be said that there is no second equipment that can be used to treat oil field mud because it is wrapped with oil and the viscosity of oil makes all equipment with filtering media such as filter cloth unusable. The benefits of decanter centrifuges lie in the following.

In conclusion, decanter centrifuges are widely used in the process of oilfield mud reduction. It can be said that the decanter centrifuge is the best choice for treating oilfield drilling mud, and it can hardly be replaced by any other equipment in terms of automation, manual operation, efficiency, etc.

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