Patent ID: 8857517

Claim:
A debris removing apparatus for connection to a tubing string that is moved at the surface into a walled subterranean wellbore, comprising: an elongated tubular shaped body having a first passageway extending through the body from one end to the other; means on one end of the body for connection to a tubing string whereby the first passageway in the body is in fluid communication with the tubing string, and wherein the body is moved in the wellbore by manipulation of the tubing string; a sealing element mounted on the exterior of the body, the sealing element sealing against a larger differential pressure from axially below the sealing element than above; a second passageway in the body communicating with the exterior of said body above and below the sealing element, the second passageway bypassing the sealing element; a one-way check valve connected to the second passageway, the valve having a valve element, a valve seat, and an actuator element resiliently urging the valve element in one direction against the valve seat, and the valve element being moveable between a first position blocking flow through the second passageway when the apparatus is moved in the wellbore and a second position for permitting both forward and reverse fluid circulation through the second passageway to bypass the sealing element.