Selectively releasable and reengagable expansion joint for subterranean well tubing strings
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United States of America Patent
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Oct 18, 1988
Grant Date -
N/A
app pub date -
Mar 5, 1987
filing date -
Mar 5, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention provides an apparatus for limiting tension produced in a tubular string extending from a packer set in a subterranean well to the well surface. Such apparatus comprises a receptacle secured to the packer and defining an elongated seal bore, and a mandrel telescopically and sealably related to the seal bore, the mandrel being connected to the bottom end of the tubing string. In one embodiment, a collet, incorporated in the receptacle for cooperating with an abutment formed on the mandrel, thereby securing the mandrel and the receptacle in a telescopically contracted position until sufficient tensile force is exerted on the mandrel to cause the collet arms to be expanded by the abutment to permit upward movement of the mandrel relative to the receptacle.
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