Buoyant system for installing a casing string
AssigneeWeatherford Technology Holdings, LLC
InventorsRichard Lee Giroux, Jobby T. Jacob, Jeffery Morrison, Joshua Vernon Symms, Luis A. Urdaneta
Life of this patent
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Abstract
A sealing device includes a tubular body having a bore; a collet seat having a plurality of collets; a frangible sealing element disposed in the collet seat and blocking fluid communication through the bore; and a releasable sleeve releasably attached to the tubular body and retaining the collet seat against the tubular body. In one embodiment, the plurality of the collets includes threads mated with threads on the tubular body. In another embodiment, the plurality of the collets is attached to the sleeve.
Claims20
A sealing device, comprising:
- a tubular body having a bore and threads;
- a collet seat having a plurality of collets and moveable from a first position to a second position, wherein the plurality of the collets includes threads mated with the threads of the tubular body in the first position, wherein the threads of the plurality of collets are disengaged with the threads of the tubular body in the second position;
- a frangible sealing element disposed in the collet seat and blocking fluid communication through the bore, wherein the collet seat is moveable from the first position to the second position in response to a fluid pressure acting on the frangible sealing element;
- and
- a releasable sleeve releasably attached to the tubular body and configured to retain the collet seat in the first position.
A sealing device, comprising:
- a tubular body having a bore and a shoulder;
- a collet seat disposed within the tubular body and axially moveable from a first position to a second position, wherein an end of the collet seat contacts the shoulder when the collet seat is in the second position;
- a frangible sealing element configured to block the bore when the collet seat is in the first position, wherein the frangible sealing element is configured to move with the collet seat and configured to break in response to an impact force caused by the collet seat contacting the shoulder when the collet seat reaches the second position;
- a sleeve configured to maintain the collet seat in the first position, wherein the sleeve is moveable to allow the collet seat to move to the second position.
A sealing device, comprising:
- a tubular body having a bore, a recessed portion, and threads;
- a collet seat disposed in the recessed portion and having a plurality of collets, the plurality of the collets includes threads, wherein the collet seat is moveable from a first position to a second position, wherein:
- when in the first position, the threads of the plurality of collets are engaged with the threads of the tubular body;
- and
- when in the second position, the collet seat contacts a lower end of the recessed portion and the threads of the plurality of collets are disengaged with the threads of the tubular body;
- a frangible sealing element disposed in the collet seat, wherein the frangible sealing element blocks fluid communication through the bore when the collet seat is in the first position;
- and
- a releasable sleeve moveable from a first position to a second position, wherein the releasable sleeve is attached to the tubular body and retains the collet seat in the first position.
Dependencies are inferred from the claim text.