Casing landing and cementing tool and methods of use
AssigneeLonghorn Casing Tools Inc.
InventorRandall Gosselin
Life of this patent
Estimating the term…
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.
Claims7
A wellbore obstruction-clearing tool, fit to a downhole distal end of a casing string for advancing the casing string through obstructions in a wellbore, the casing string having an axial tubular bore therethrough, the tool comprising:
- a tubular, rotatable sleeve for engaging the obstructions, the rotatable sleeve having an axial sleeve bore extending axially therethrough and a disruptor connected to a distal end thereof;
- a tubular mandrel adapted for connection to the distal end of the casing string, the mandrel having an axial mandrel bore extending therethrough for fluid connection to the axial bore of the casing string, the mandrel fit concentrically within the sleeve bore for axial reciprocation of the sleeve between an upstroke and a downstroke;
- a helical drive arrangement acting between the mandrel and the sleeve for driving the rotatable sleeve axially and rotationally along the mandrel during the downstroke and the upstroke of the mandrel between a retracted position and an extended position respectively;
- a spring fit concentrically about an external surface of the mandrel and operative between the sleeve and the mandrel between the retracted and extended positions;
- and
- a check valve in the axial mandrel bore, wherein in the downstroke the sleeve is driven onto the mandrel to the retracted position;
- and
- in the upstroke, the spring biases the rotatable sleeve to the extended position.
Dependencies are inferred from the claim text.