The solid control system is an indispensable system function module in oil drilling operations, the traditional solid control system is usually composed of a circulation tank, shale shaker, cleaner,centrifuge, etc., with a high cost of purchase and subsequent use, high energy consumption, low reliability, in order to meet the zero discharge environmental regulations need to support the corresponding drilling mud treatment system and other drawbacks. To this end, we have proposed an integrated solution to replace the traditional water-based waste mud treatment system and drilling waste system based on years of practical experience. It has been successfully applied to an oilfield drilling site in Changqing and has achieved good economic and energy-saving environmental benefits.
Water-based drilling waste disposal process
Wellhead return mud discharge to circulation settling tank;
The mud in the circulating settling tank is settled step by step by way of high overflow and then pumped back to the solid control system with the submersible sludge pump for reuse, and the solid phase is transported to the broken rubber tank with the excavator;
Three agitators are installed on the rubber-breaking tank, and the materials entering the rubber-breaking tank are added to flocculate;
The filter press slurry pump suction broken glue tank flocculated material to the filter press for filtering;
The clear liquid after pressing and filtering can be continuously transported to the storage tank;
The solid phase after filtration is transported to the buried tank through the belt conveyor;
Use the excavator to transfer the solid phase of the buried tank.
The equipment of the oil-based mud zero discharge system includes: high-speed drilling fluid centrifuge (with screw pump), drill cuttings dryer (also known as cuttings drying machine, drilling cuttings drying machine), dosing device, Screw conveyor, cuttings box.
KOSUN’s oil-based mud zero discharge system is simple in structure, easy to maintain, and has good treatment effects. It is the leader in environmentally friendly treatment of drilling waste mud. At present, the number of wellheads using oil-based drilling fluids is increasing, and there are more and more waste oil-based drilling fluids. It is very important to treat and dispose of waste oil-based mud from drilling in a timely and harmless manner.
KOSUN oil-based mud zero discharge system processing process: the drilling fluid mud to be processed is transported to the cuttings dryer (cuttings drying machine, drilling cuttings drying machine), and the treated drilling fluid mud is transported to the drilling fluid centrifuge for further processing, and the mud liquid after the drilling fluid centrifuge treatment is re-injected into the mud circulation system. The treated waste is transported to the cuttings box.
The complete sets of Oil based drill cuttings treatment & Drilling cuttings waste management Equipment include: drill cuttings dryer, drill cuttings centrifuge, drill cuttings conveyor, pump and electronic control system. Oil-based drilling cuttings is a kind of oil-field drilling fluid, also called oil-based mud, which includes oil as the continuous phase, water volume content up to 50% as the dispersed phase, emulsifier as stabilizer and water-in-oil emulsion drilling fluid and A drilling fluid usually made up of diesel oil, oxidized asphalt, organic acids, alkalis and other chemical agents. Oil-based drilling fluid has the advantages of high temperature resistance, salt and calcium corrosion resistance, which is beneficial to the stability of the borehole wall, good lubricity, and less damage to oil and gas formations. At present, it has developed into an important method for drilling high-temperature wells, deep wells and other high-difficulty wells and various complex formations, but the preparation cost is much higher than that of water-based drilling fluids.
Oil based drill cuttings treatment & Drilling cuttings waste management Equipment is composed of screw conveyors, drill cuttings dryers, environmentally friendly centrifuges and other equipment, supporting the mud solids control system to achieve mud processing while drilling, instead of the traditional method of using filter press or mud pool, greatly improving economic and environmental benefits, it is widely used in oilfield drilling.
After treated by the Oil based drill cuttings treatment & Drilling cuttings waste management Equipment, oil-based drilling cuttings pass through the special oil-based mud non-ground treatment system, 30-50 tons of oil-based drilling cuttings can be processed per hour without adding any chemicals, and the oil-based oil content of the drilling cuttings is controlled by 5% to 8%; The requirements of “no pooling”, “reduction” and “zero discharge” and “zero addition” at the wellsite have been implemented. The emergence of the drilling waste treatment and purification system can not only solve the on-site environmental problems, but also recycle the waste generated by the on-site solids control system. It can retain the useful mud while reprocessing the drill cuttings. Carry out concentrated curing treatment to reduce the damage to the surrounding environment caused by field operations. The use of waste mud cake after drilling waste treatment: it can be used for secondary utilization such as brick burning and road paving.