液动锤钻进减轻岩心堵塞机理的研究

Study on Mechanism of Reducing Core Blockage in Hydro-hammer Drilling

摘要:

通过对液动锤取心钻进过程中钻具的受力分析，论述了液动锤减轻岩心堵塞的作用机理，阐明了液动锤钻进技术的适用地层范围，介绍了其在汶川地震断裂带科学钻探工程WFSD-4号孔中应用取得的成果。

关键词:岩心钻探;液动锤;岩心堵塞;作用机理

Abstract:

By the force analysis on core barrel in hydro-hammer coring drilling process, this paper discusses the action mechanism of reducing core blockage in hydro-hammer drilling. In addition, the applicable stratum range for hydro-hammer drilling are clarified and the results achieved during the drilling operation for the hole WFSD-4 of Wenchuan earthquake fault scientific drilling project are introduced.

Key words:core drilling; hydraulic hammer; core blockage; action mechanism