MOVABLE WELL BORE CLEANING DEVICE

摘要

The invention provides a device for cleaning a wellbore, comprising a tubular section, a helical scratcher mounted thereof wherein said helical scratcher contains flexible wires characterized in that the helical scratcher is able to rotate axially to tubular section when a fluid flows axially to tubular section. Alternatively, the invention provides the method to clean a wellbore wall of a well, said method comprises the steps of: incorporating a device as previously described into the wellbore; moving the device in the well and allowing the fluid flowing axially to the wellbore wall to rotate the scratcher; removing deposit at wellbore wall; leaving a cleaned wellbore wall.