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Researchers have designed many kinds of hole cleaning tools to improve hole cleaning condition in the complex structural wells. In this paper a mathematical model was built to analyzing the cutting particles movement on the helical blades of hole cleaning tool. The relationships between blade helical angles and cuttings transport velocity in tangential direction and axial direction are obtained by solving the model. The results show that blade helical angle as a controlling variable has a significant impact on application effect of the spiral hole cleaning tool; tangential cuttings velocity increases and axial cuttings velocity decreases with the increase in the helical angle and adjusting the helical angle can reach the required cuttings velocity. © Xiaofeng et al.

Cuttings Transport Behavior and Simulation Analysis Affected by Hole Cleaning Tool