Analysis oo Core Blockage Mechanism in the Core Drilling Operation of Wenchuan Earthquake Fault Scientific Drilling Project

Abstract:

By the analysis on core blockage mechanism with split core barrel for the coring operation of the borehole No.4 of Wenchuan Earthquake Fault Scientific Drilling Project, the paper summarized 4 core blockage forms. Some technical measures to reduce core blockage are suggested for each type of the core blockage form.