Patent ID: 9068416
Filing Date: 2015-06-30
Classification: E21B

Abstract:
1. An apparatus for removing debris from a well fluid in a subterranean wellbore, the apparatus comprising: a power head tool connected to a tubing string for positioning in the wellbore; and a knock-out tool connected along the tubing string downhole from the power head tool, the knock-out tool comprising an elongated housing defining an interior passageway, a knock-out member, and a removable subassembly; wherein the removable subassembly comprises an elongated inner tube positioned within the housing, thereby defining an annulus between the inner tube and housing, a faceplate removably attached to the housing, the faceplate for blocking fluid flow from the lower end of the annulus between the inner tube and housing, the faceplate having an inlet passage therein for directing fluid flow into the interior of the inner tube; wherein the knock-out member is positioned proximate an upper end of the elongated housing and operable to direct debris in the well fluid into the annulus between the inner tube and housing; wherein the knock-out member is substantially conical in shape having an apex of the knock-out member extending towards the inner tube and an opposing base extending away from the apex to contact an interior surface of the housing; wherein the power head tool creates a fluid flow within the interior passageway in a direction away from the inner tube and towards the knock-out member; and a screen assembly for removing debris from the well fluid, the screen assembly positioned uphole from the knock-out assembly.