Solid Control System is a comprehensive equipment system used in petroleum drilling engineering to control the solid content of drilling fluid (drilling mud). Its composition can be divided into four core modules, and each module works together to achieve precise control of drilling fluid performance:

• 1. Solid phase classification processing equipment
  • Shale Shaker: As a primary separation unit, it filters large particle debris (>75μ m) from drilling fluid through multiple layers of vibrating screens (usually 40-200 mesh), with a processing capacity of 50% -70% of the total system flow rate. It is equipped with screen angle adjustment and sand flushing nozzle system.
  • Cyclone separation unit:
    • Desander: It uses a 10-12 inch conical cyclone to separate solid particles with a size of 40-75 μ m, equipped with a bottom flow density sensor and pressure compensation device.
    • Desilter: Integrated with a 4-inch micro cyclone group, it separates particles ranging from 15-40 μ m and features a modular design that allows for quick replacement of cyclone cores.
  • Centrifugal processing unit:
    • Decanter Centrifuge: Separate<10μ by using double drum differential rotation (differential range 0-30rpm); M ultrafine particles and colloids, equipped with variable frequency drive and torque monitoring system.
    • High Speed Centrifuge: Specially designed to remove oil-based pollutants from drilling fluids, with a speed of over 6000rpm, equipped with gas seals and explosion-proof devices..
• 2. Drilling fluid circulation system
  • Mud Tank System: includes reserve tanks, treatment tanks, and metering tanks, with a total capacity usually 1.5-2 times the total volume of drilling fluid, equipped with level transmitters and temperature sensors.
  • Mud Pump System: The main pump adopts a three cylinder single acting reciprocating pump with a displacement range of 1000-3000L/min, equipped with pressure sensors and safety valve groups.
  • Agitation System: Adopting a turbine or propulsion agitator, equipped with variable frequency speed regulation and overload protection, to ensure uniform suspension of drilling fluid..
• 3. Solid phase disposal system
  • Cuttings Transport: includes a screw conveyor, a vibrating conveyor trough, equipped with wear-resistant lining plates and sealing covers, and processing capacity matched with the vibrating screen..
  • Dry Shaker: The solid phase discharged from the centrifuge is subjected to secondary dehydration, equipped with a composite screen and negative pressure suction device, and the moisture content can be reduced to below 15%.
  • Waste Management Unit: Includes chemical solid-liquid separation device and filter press, meets environmental emission standards, equipped with pH monitoring and neutralization dosing system..
• 4. Intelligent Control System
  • Parameter Monitoring Network: Deploy 16-32 channel data acquisition modules to monitor key parameters such as solid content, density, viscosity, pH value in real-time, with a sampling period of 1 second..
  • Automatic control unit: PID algorithm is used to achieve equipment linkage control, supporting automatic adjustment of screen mesh size, cyclone pressure compensation, centrifuge differential speed optimization and other functions..
  • Remote operation and maintenance platform: Integrated 4G/5G communication module, realizing remote monitoring of equipment status, fault diagnosis, and parameter cloud synchronization, equipped with AR assisted maintenance interface..

The system uses a four stage separation process (mechanical screening→); Cyclone separation→ Centrifugal treatment→ By constructing a complete solid-phase control chain through fine filtration and combining it with a closed-loop control system, the technical indicators of processing efficiency of 95% and drilling fluid recovery rate of 85% can be achieved, meeting the diverse needs of onshore conventional wells, deep-sea drilling platforms, shale gas horizontal wells, and other scenarios. A typical configuration scheme can be modularized and combined based on geological characteristics such as soft mudstone, hard rock layers, and salt gypsum layers to form a highly adaptable drilling fluid treatment solution.