Technical points of drilling mud operation

　　Drilling mud is an essential step in construction engineering, and there are always closely related points to be elaborated in details and security issues. As an analysis of the key points, let's have a deep understanding of the important technology application points in the construction!
　　The mud can form a thin and tough mud skin on the hole wall, which can protect the hole wall and prevent the sticking and clamping accidents caused by collapse and falling block. Using the internal structural strength of the mud to suspend the rock powder, the rock powder will not sink into the bottom of the hole quickly when stopping the drilling and pump, so as to prevent the drilling accident.
　　It has a certain viscosity. Drilling in fractured or fractured formations can stop leakage, prevent leakage and reduce the consumption of flushing fluid.
　　The mud has the function of protecting the hole. When drilling in the complex formation, the mud can run less or no casing, greatly improving the construction speed and reducing the drilling cost.
　　Mud plays the role of cutting and lubricating, cooling machines and tools, carrying slag and protecting wall in construction. Therefore, we must correctly use the mud construction technology to ensure the quality of trenching. The hydrostatic pressure of mud can play the role of liquid support. In addition, the mud skin is conducive to the stability of soil wall, while the viscosity can suspend the soil slag, which can ensure the drilling efficiency of the bit.
　　In the application of technology, it is necessary to ensure that the slurry used in construction has sufficient viscosity, density and concentration to ensure the role of slag carrying and wall fixation. Remember that the viscosity should not be too high, so as not to increase the resistance of mud circulation and affect the quality of concrete. The stability of the mud must be ensured within the time of stratification.