Tag Archives: China Solids Control System
The Drilling Solids Control System reduces the rate of drilling accidents
Accidents such as stuck pipe, well leakage and gas invasion not only lead to delays in the construction period. These accidents are directly related to the deterioration of drilling fluid performance and the accumulation of solid impurities. The Drilling Solids Control system through the efficient purification of drilling fluid, has become key device for reducing drilling accidents.
Drilling accidents and Drilling Solids Control system
The root cause of most serious accidents is closely related to the state of the drilling fluid. The core function of the fixed Drilling Solids Control system is precisely to solve these key problems:
| Common drilling accidents | The role of the solid control system |
| Stuck drill | Remove solid impurities and maintain the low solid phase of the drilling fluid. Good liquidity. Avoid rock debris deposition and overly thick filter cakes |
| Well leakage | Purify the drilling fluid and stabilize its rheological properties. Control the filtration loss in combination with chemical treatment agents. Ensure pressure balance |
| Gas intrusion/blowout risk | The vacuum degasser can quickly degas. The purification system maintains the stability of the drilling fluid density. Avoid losing control of stress |
| Drill bit wear | Remove hard sand grains. Maintain the cleanliness of the drilling fluid. Reduce the risk of wear and corrosion |
The drilling solids control system is purified through the process of “shale shaker → desander → desilter → centrifuge”. Achieve precise removal of solid particles of different sizes
The shale shaker removes large rock cuttings of ≥74μm to prevent their deposition in the wellbore. Prevent sand settling and stuck drill from the source.
The desander and desilter separate sand particles of 20-74μm and fine mud of 10-20μm. Reduce the abnormal increase in the viscosity of drilling fluid. Avoid sticking stuck drills and overly thick filter cakes;
The centrifuge can deeply remove ultrafine particles of 5-10μm. Prevent the “deterioration” of drilling fluid, which may lead to an increase in fluid loss.
Drilling engineering with a complete drilling solid control system. It can keep the solid content of drilling fluid below 5%. The occurrence rate of sand settling stuck pipe accidents has been reduced by more than 80%.
The Components of Solids Control System
Describe the Components of the solids control system
The solids control system is composed of multi-stage purification equipment, auxiliary equipment and pipeline systems. All levels of solids control equipment work in collaboration to achieve purification from coarse to fine.
The Components of Solids Control System
- Mud Shale Shaker:
Primary Solids Control equipment is also the “first line of defense” of the solids control system. The large particle cuttings (with a particle size of ≥74μm) in the drilling fluid are separated by high-frequency vibration.
The processing volume is usually 1.2 to 1.5 times the circulation volume of the drilling fluid, ensuring the efficient operation of subsequent equipment.
mus shale shakers can be classified into linear shale shakers and elliptical shale shakers. elliptical shale shakers are widely used in deep Wells and horizontal well drilling. it features high screening efficiency and strong processing capacity. - Desander:
Secondary Solids Control equipment. The desander adopts the principle of hydrocyclone to separate sand particles with a diameter of 20-74μm from the drilling fluid. It is usually used in conjunction with shale shakers. The sand grains separated by the cyclone fall into the small vibrating screen below to further recover the drilling fluid. - Desilter：
The third level in the solids control system. The sludge separator separates fine sludge particles of 10-20μm. The shaker screens of the deslimer is generally configured with 120 mesh. The sand removal cyclone has a smaller diameter and higher separation accuracy. It can effectively reduce the mud content of drilling fluid and maintain the stability of rheological properties. - Decanter Centrifuge：
Four-level deep Solids Control equipment. Solid-liquid separation is achieved by utilizing centrifugal force. Centrifuges are mainly used to separate ultrafine particles of 5-10μm. It is suitable for precision drilling scenarios with extremely high requirements for drilling fluid performance. It is mainly used for shale gas development and deep-sea drilling. It can enhance the reuse rate of drilling fluid.The centrifuge is components of solids control system.
Other equipment in the Components of Solids Control System：
The Components of Solids Control SystemIncluding drilling fluid tank, agitator, sand pump and vacuum degasser. Together, they form complete solids control system.
