Research on Hydro-oscillator for petroleum drilling engineering

摘要

During the process of curve section or long radius drilling in the horizontal well, between the drilling string and wellbore, the phenomenon of friction, sticking and backing pressure is very serious. The newly developed Hydro-oscillator could make vibration in radial direction and axial ones. So the tool could reduce the sliding friction and increase the effective drilling weight of the bit(WOB). This tool was widely tested in Changqing oilfield. The result shows that the sliding drilling speed is up to 100.96% and sliding drilling achieved significant results with this tool.