It’s well know that solids content has influence on drilling process. Then, how to make the oil or gas drilling process better? The answer definitely is using solids control system to control the solid content. But what is the solids control? Let’s have a look together.
According to the different medium, mud is divided into water-based mud, oil-based mud and emulsion mud. According to the need of different strata and drilling design, reasonably select drilling mud system is a necessary condition for fast, high quality, safe drilling.
Drilling Mud Solids Control System
Solids control is a technique used in a drilling rig to separate the solids in the drilling fluids that are crushed by the drill bits and carried out of the well surface. Normally, a solids control system contains five stages: the mud tank, oilfield drilling shale shaker, vacuum degasser, desander, desilter, and centrifuge. The shale shaker is used to separate big solids with diameter above 76μm, the desander addresses solids from 47-76μm, and the desilter segregates solids between 12-47μm. Sometimes the desander and desilter are combined as one high efficiency mud cleaner. When air enters the drilling fluids, a vacuum degasser is used to separate the air. If no air is found in the mud, the degasser would work as a big agitator. All these stages are mounted on the top of the mud tank. After separating the solids, the clean mud can be pumped into the borehole again.
Shale shaker, hydrocyclones and oilfield decanter centrifuge are three essential solids control equipment in the process of drilling, play very important roles in solids control if reasonably combined, can use chemical flocculation mud to make solids control more effective in order to ensure the safety, high quality and fast drilling mud performance. Comparative analysis of the working principle, cleaning efficiency, scope use of the solids control equipment, select solids control equipment according to the specific requirements of solids control process parameters are calculated, to achieve the best matching effect.
The solid phase in mud is divided into active and inert or useful and useless, reasonable mud solid content in slurry can make the drilling speed to achieve the best effect; reasonable control of mud solid type can make the mud properties to achieve the best effect.
It is mainly used to improve the quality of materials, machining process, machining precision of general matching oil drilling mud equipment.