| 摘要 |
A debris collecting tool for use within a wellbore is provided. The tool comprises a filter body having an upstream end and a downstream end. A first fluid passage extends longitudinally between the upstream and downstream ends of the filter body, and at least one second fluid passage connects the first fluid passage with the exterior of the filter body. A filter is located between the first fluid passage and the at least one second fluid passage. The tool further comprises a flow controller movable between a first position in which fluid is prevented from entering the at least one second fluid passage from the exterior of the filter body, and a second position in which fluid is permitted to enter the at least one second fluid passage from the exterior of the filter body. An agitator body is attached to the upstream end of the filter body, and includes at least one radially projecting agitation member. Methods of using the tool to collect debris and clean a wellbore are also provided.
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