Blast joint swivel for wellhead isolation tool and method of using same
AssigneeStinger Wellhead Protection, Inc.
InventorsBob McGuire, L. Dallas
Life of this patent
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Abstract
A blast joint swivel for use in a wellhead isolation tool includes a blast joint hanger mounted to a top of the wellhead isolation tool and a swivel body rotatably received in the blast joint hanger. The swivel body threadedly connects to a blast joint, which in turn threadedly connects to a top end of a tubing string suspended in a well. The blast joint swivel can also be displaced vertically over a limited range between upper and lower abutments to facilitate threading of the blast joint to the tubing string. The blast joint swivel facilitates connection of the wellhead isolation tool to the tubing string, which reduces wellhead isolation tool setup.
Claims20
A blast joint swivel for use in a wellhead isolation tool, comprising:
- a blast joint hanger mounted to a top of the wellhead isolation tool;
- and
- a swivel body received within the blast joint hanger, the swivel body having an axial fluid passage with bottom threads for connection to a top end of a blast joint, the blast joint hanger supporting the swivel body for unconstrained axial rotation relative to the blast joint hanger.
A method of connecting a blast joint of a wellhead isolation tool to a tubing string suspended in a wellbore of a well, the method comprising:
- mounting a blast joint swivel to a top end of a wellhead isolation tool and connecting the blast joint to a bottom end of the blast joint swivel;
- hoisting the wellhead isolation tool over a wellhead of the well and lowering the wellhead isolation tool until a threaded bottom end of the blast joint contacts a threaded upper end of the tubing string;
- and
- rotating the blast joint to threadedly connect the blast joint to the tubing string.
A wellhead isolation tool for isolating a wellhead from high pressure fluids used to stimulate a well, comprising:
- a fracturing head having side ports through which the high-pressure fluids can be pumped into the well;
- a blast joint hanger mounted to a top of the fracturing head, the fracturing head and blast joint hanger together defining a central bore in fluid communication with the side ports;
- a tubular swivel body received within the central bore for unconstrained rotational movement relative to the blast joint hanger;
- and
- a tubular blast joint connected to a bottom end of the swivel body, a bottom end of the blast joint being threaded for connection to a top end of a tubing string suspended in the well.
Dependencies are inferred from the claim text.