The application of oil drilling solids control decanter centrifuge

In the oilfield drilling, decanter centrifuge is used frequently and is necessary to effectively control solids particles in the drilling fluids. Decanter centrifuge is also called horizontal screw discharge sedimentation centrifuge, is the special solids control equipment of solid-liquid separation, designed by the characteristic of drilling fluid. It can accomplish each procedure of feed, centrifugal sedimentation, unloading, etc.

Decanter centrifuge is driven by two motors. The main motor drives the drum and the outer casing of differential through belts while the auxiliary motor, after the differential shifting speed, drives the spiral propeller. This will make the drum and the spiral propeller rotate in the same direction with a certain differential speed. And when the material is fed into the inner canister of the spiral propeller from the feed pipe, the material will be flowing to the drum wall through material exit. The degree phase of the material is different because it is subjected to different centrifugal force and so, the material with heavy phase will be quickly accumulated onto the inner wall of drum while the material with light phase will slowly stick to the surface of heavy phase, a layer of interface to be formed between degree phases. And along with increase of heavy phase accumulation, the top end of spiral vanes will be inserted into the accumulated layer of heavy phase. By this step, the drum and spiral impeller are rotating with high speed in the same direction, having differential speed value to some extent. And the relative revolution difference is making grain of heavy phase move to the material exit on the small end while the liquid of light phase is forming into passage, flowing to the exit of liquid phase. The overflowing mouth position of liquid phase is controlled by the regulating plate.

Decanter centrifuge by KOSUN is widespread in North America, Europe, Middle East and so on. KOSUN decanter centrifuge is used in separating suspension of solid phase with particle diameter not less than 2μm for drilling mud and fluids handling. Ruggedly built for oilfield and industrial services, it is especially effective in environmentally sensitive areas. It delivers high fluid-recovery rates and efficient solids control to significantly reduce the costs of makeup fluids and disposal. The centrifuge is precision –balanced for smooth operation over long periods at the speed of 0 to 3900 RPM, generating centrifugal forces up to 3000G’s.
Features & Benefits of KOSUN decanter centrifuge:
1. Innovative design includes longer bowl for increased retention time, resulting in drier solids and finer cut points.
2. Big bowl Big Volume, high G force available.
3. Stainless steel bowl, scroll, compartment and cover resist corrosion and provide long service life.
4. Tungsten carbide scroll points with wide spacing flights at tapered end create a finer layer of conveyed solids for consistent, uniform separation and maximum solids control efficiency.
5. German FAG or Sweden SKF brand bearings.
6. Electrical Components: SIEMENS/Schneider ATEX or IEC Ex for option.
7. Screw pump & centrifugal pump feeding pump option available to meet different application.

As a China solids control company, KOSUN can supply complete line of high-speed, variable-speed and fully variable-speed decanter centrifuge for handling drilling fluids.