Water well drilling rigs should adopt different methods when encountering different geological layers in the process of drilling wells, so as to achieve a good effect, the different geological layers that will be encountered are also necessary. The quicksand layer and the gypsum layer are often It will be encountered that once gypsum invasion occurs during the drilling process of water well drilling rigs, calcium ions can be removed by participating in soda ash, calcium removal and viscosity reducing agents, etc. At the same time, the use of calcium-resistant strong viscosity reducing agents can control stick cutting and make up for loss of filtration Agent, anti-collapse agent and other materials to maintain the stability of the function of the water drilling rig drilling fluid.
Before drilling into the gypsum layer, pre-treat the drilling fluid of the
water well drilling rig to lower the solid phase, reduce the viscosity and cut, and participate in the anti-gypsum treatment agent (such as soda ash, calcium removal viscosity reducer, etc.) in advance, and prepare in advance according to the adjacent well construction materials Treatment agent for the gypsum layer. Improve the pH value of water well drilling rig drilling fluid, and then improve the ability of small water well drilling rig drilling machinery water well drilling rig to resist gypsum pollution.
When drilling quicksand formations, it is necessary to increase the viscosity of the
water well drilling rig drilling fluid and increase the content of bentonite in the water well drilling rig drilling fluid, which is generally required to be greater than 10%. Participate in the single seal to enhance the wall making property of the water well drilling rig drilling fluid. Decreased displacement, reduced erosion of the convective sand layer, it is necessary to close the well section with thick mud with a viscosity greater than 80s before starting drilling, to ensure that the small water well drilling rig drilling machine, drilling, electrical measurement, and casing are smooth.
Quartz sandstone is a kind of very strong rock.
Water well drilling rig often shows slow penetration during the drilling process. One meter or two meters of sand can be seen. The drilling tool beats severely, the slag and rock are cut more, and the drill is buried. Therefore, a specific understanding of this terrain is needed.
