Challenges of Silty Sand Layer Characteristics to Water Well Drilling Operations
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Impact of Fine Particle Structure
Silty sand layers have fine particles, high porosity, and strong permeability, posing challenges to drilling. Fine particles easily form a suspended state during bit cutting, increasing the burden on the mud circulation system and causing poor cuttings discharge.water well drilling rig -
Risk of Quicksand and Wellbore Collapse
High porosity and permeability make silty sand layers prone to quicksand when exposed to water, leading to wellbore collapse. على سبيل المثال, in a silty sand area, quicksand caused wellbore collapse, delaying the project and jamming the drill bit.water well drilling rig -
Differences in Compactness and Operational Adjustments
Silty sand layers vary in compactness: loose layers are easily disturbed, while dense layers severely wear the drill bit. Operators must adjust drilling parameters and methods in real time based on these characteristics to address complex challenges.