Wellbore cleanout tool and method

摘要

The present invention is directed to a method and apparatus for cleaning a wellbore. The method is designed to remove debris particles from the wellbore by suspending the debris within the wellbore and then forming an approximately helical flow stream in the wellbore to remove the particles. One apparatus includes a body with a flow channel and multiple nozzles connecting to the flow channel and extending to the circumference of the body. Each nozzle has a nozzle axis that bisects the circumference forming a nozzle axis-circumference intersection; the nozzle axis is not on a plane that is formed by the vertical axis and the nozzle-axis-circumference intersection.