The important role of the drilling fluid Decanter Centrifuge in the solids control system
The drilling fluid Decanter Centrifuge is also known as the horizontal spiral unloading sedimentation Decanter Centrifuge. Drilling industry experts generally agree that the drilling fluid Decanter Centrifuge plays an important role in the solids control system. Decanter Centrifuge is used for the separation of suspensions containing solid particles with a diameter of ≥2μm, as well as the treatment of drilling mud and liquid. It is particularly effective for oilfield and industrial services, especially in environmentally sensitive areas. The recovery rate is high, the solid phase control is effective, and the cost of mud replenishment and treatment is significantly reduced. This series of centrifuges are equipped with sophisticated dynamic balancing equipment, which can run smoothly for a long time at a speed of 0~3900RPM, and the centrifugal force generated can be as high as 3000G.
Decanter Centrifuge drilling fluid mainly includes two mainstream varieties of medium-speed centrifuge and high-speed centrifuge. The speed of the medium-speed drilling fluid centrifuge is 1300-2200r/min, the centrifugal force generated is about 800 times the gravity, and the processing capacity is 40-60m3/h. This centrifuge is used to remove 5-7μm solid particles; The speed of the high-speed drilling fluid centrifuge refers to 2500-3300r/min, the centrifuge produced is about 1200-2100 times the gravity, and the centrifuge with a separation particle size of 2-5μm. The processing capacity of this Decanter Centrifuge can be automatically based on the performance of the drilling fluid. It can be adjusted and can effectively control the performance of drilling fluid through real-time load monitoring and full frequency conversion automatic closed-loop technology. It is an ideal solids control and purification equipment for drilling deep wells and horizontal wells that require special process requirements. The other is a fixed-speed high-speed drilling Decanter Centrifuge, this kind of drilling fluid Decanter Centrifuge is generally set at 2 to 3 speeds higher than the ordinary Decanter Centrifuge. The operator judges the performance of the drilling fluid, and manually adjusts the speed of the centrifuge to achieve a better drilling fluid. Treatment effect.
The Decanter Centrifuge drilling fluid has played an increasingly important role after the application of the drilling fluid. Many drilling teams are equipped with 2 centrifuges. It should be noted that they are equipped with two drilling fluids with exactly the same technical performance as the Decanter Centrifuge. Centrifuge (usually a medium-speed centrifuge, sometimes with different processing capacity), should adopt a parallel technological process, so as to use each other as a backup or increase the processing capacity of drilling fluid during rapid drilling. At present, most foreign companies have produced With a full frequency conversion control high-speed drilling fluid centrifuge, this high-speed Decanter Centrifuge is expensive and requires a relatively high quality of operators. It must be operated and maintained by a dedicated electrical engineer. At present, only a few domestic drilling teams that go abroad are equipped with this type of high-speed Decanter Centrifuge. For special wells that require high drilling fluid performance, it is recommended to use a medium-speed centrifuge and a domestic high-speed centrifuge in series. The processed drilling fluid enters the fluid supply tank of the high-speed centrifuge, and after being processed by the high-speed Decanter Centrifuge, it enters the circulation system for reuse. At this time, the solid phase of the drilling fluid has been well purified, which is of positive significance for improving the service life of subsequent equipment, saving the amount of mud material, and increasing the ROP.