Because of the different geological structures throughout the country, it is common to encounter different geological structures in the drilling process of well drilling machines. In order to achieve good drilling results, it is necessary to understand the drilling methods for different geological layers. For example, when it comes to gypsum layer and quicksand layer, in this paper Relied Group technicians put forward their own solutions：

When drilling encounters a gypsum layer, the drilling fluid is first pretreated, and calcium ions can be removed by adding anti-gypsum-type treatment agents such as soda ash and calcium removal and viscosity-reducing agents, while viscous cutting is controlled by using viscosity-reducing agents with strong calcium resistance and supplemented with filter loss-reducing agents, anti-collapse agents and other materials to maintain the stable performance of the drilling fluid, thus improving the ability of the drilling fluid to resist gypsum contamination in the drilling rig.

When encountering quicksand-like formations, the drilling fluid viscosity must be increased, the bentonite content in the drilling fluid must be increased, generally requiring more than 10%, adding a single seal to enhance the wall-building properties of the drilling fluid, and engineering to reduce the erosion of the quicksand layer by appropriately reducing the displacement, and the well section must be closed with a thick mud with viscosity greater than 80s before starting drilling to ensure that the drilling equipment is drilled, electrically tested, and the casing is lowered smoothly.

Experienced well drillers understand the importance of preparation. Before drilling a well, you need to consult with the geological structure of the well location, deploy a construction plan and solutions to problems you may encounter, and prepare the appropriate tools and accessories in order to ensure the smooth progress of the well drilling process.