As a pneumatic water well drilling rig manufacturer, we understand that pneumatic water well drilling rigs should adopt different methods when encountering different geological layers in the drilling process to achieve good results. Different geological layers should also be encountered, such as quicksand layer and gypsum layer. Once gypsum intrusion occurs during the drilling process of pneumatic water well drilling rig, calcium ions can be removed by attending soda ash, calcium removal and viscosity reduction. Meanwhile, the viscosity-reducing agent with strong calcium resistance can be used to control the viscosity-reducing and make up for the deficiency of filter-loss-reducing agent, anti-collapse agent and other materials.
I. Gypsum layer
Before drilling the gypsum layer, the drilling fluid of the rig is pretreated to reduce the solid phase and viscosity, and anti-gypsum treatment agents are involved (e.g., soda ash, calcium remover, viscosity reducer, etc.). And according to the construction materials of the neighbouring wells, the treatment agent for treating the gypsum layer is prepared in advance. Improve the pH value of the drilling fluid of the water well drilling rig, and then improve the ability of small water well drilling rig drilling machinery to resist gypsum contamination.
Second, quicksand layer
When drilling in the quicksand formation, it is necessary to improve the viscosity of the drilling fluid and the bentonite content of the water well drilling rig drilling fluid, which is generally required to be above 10%. In order to improve the wall-making performance of the water well drilling rig drilling fluid, the erosion of the quicksand layer is reduced after appropriately reducing the displacement in the project. Before starting drilling, the section must be closed with thick mud with viscosity greater than 80 to ensure the smooth starting and stopping of drilling, electric logging and casing of small water well drilling rig drilling machinery.
III. Quartz sandstone
Should time sandstone is a very hard rock, in the drilling process often appears slow drilling progress. There may be two metres of sand when drilling one metre, drilling tools jumping violently, more slag cuttings and buried drilling faults. So a detailed understanding of the terrain is needed.
Clear water does not have the same lubricity as mud, and the drilling tools in hard rock jump so much that the rock breaks up when the drilling tools jump up; clear water has a large sorting property, and the flushing fluid cannot carry the increasingly large rock chips out of the hole. Rock chips like sand kept floating and sinking in the hole. If a powder extraction tube is used, one or two metres of sand may be drilled. A little carelessness may bury the drill, and more sand will cause more trouble in clearing the hole.
The sandstone at the time of application is formed by deposition and is an extremely hard rock. Small pneumatic water well drilling rig into when drilling the hole is relatively shallow (303354200 m), so the general use of diamond drill bit clear water drilling, automatic slurry, often manifested in slow drilling footage, one metre of drilling footage may reveal two metres of sand, drilling tool jumping serious, slag, chipped rock more, drilling failure buried and so on.
Solution: If drilling with mud is not economical, you can reduce the occurrence of sand by cutting the amount of small water well drilling rigs jumping, you can add nitro acid and alkali additives in the water to play the role of vibration damping lubrication, so that you can reduce the amount of rigs jumping and sand, and then adhere to the cleaning of the drilling holes of the pneumatic water well drilling rigs, and ultimately solve the problem!
Post time: May-19-2024
