Abstract: A casing landing and cementing tool has a wellbore obstruction-clearing tool at a downhole end thereof and a check valve uphole of any fluid vulnerable components to isolate the vulnerable components from the threat of cement incursion. The check valve is manufactured of drillable materials, the plunger being axially actuable but non-rotatable, the valve body being threadably secured within the tool. In one aspect the tool is a sleeve bit rotatably and reciprocally coupled about a mandrel secured to a non-rotating casing string, the check valve located in the mandrel. In another aspect, the tool is a bit coupled to a rotatable casing string, the check valve located in the bit.

Abstract: Embodiments of a reciprocating tool, used to engage and clear obstructions in a wellbore, have a biasing spring located externally about an axially reciprocating and rotatable sleeve to act between the rotatable sleeve and the non-rotatable mandrel to bias the rotatable sleeve to an extended position. During a drill out operation, a non-rotatable sleeve, connected to the mandrel for telescoping over the mandrel and the rotatable sleeve during a downstroke of the mandrel, guides a drill string for drill-out of at least the mandrel and other internal components. Positioning the biasing spring external to the rotating sleeve and downhole of the non-rotating sleeve prevents engaging the spring with the drill string. The rotating sleeve provides an internal guide for the drill out string to further avoid engagement with the spring.

Abstract: A tool is incorporated into a tubing string and is run into a wellbore until an agitator at a bottom of the tool engages an obstruction in the wellbore. A helical drive arrangement between a mandrel and a sleeve causes the sleeve on the outside of the tool, to which the agitator is attached, to rotate as the mandrel is reciprocated between a downstroke and an upstroke. Rotation of the agitator disrupts the obstruction forming debris therefrom and a slurry of the debris in wellbore fluid. At the same time, reciprocation of the mandrel causes a standing valve and a travelling valve in the tool to be alternately opened and closed for pumping the slurry into the tool and from the tool into the tubing string for storage therein. Periodically the tool is tripped to surface and the stored debris is removed from the tubing string.