Selectively releasable and reengagable expansion joint for...

Details Selectively releasable and reengagable expansion joint for... Selectively releasable and reengagable expansion joint for...

E - Fixed Constructions

21

B

166/68

E21B 17/06 (2006.01) E21B 17/07 (2006.01)

Patent

CA 1296620

SELECTIVELY RELEASABLE AND REENGAGABLE EXPANSION JOINT FOR SUBTERRANEAN WELL TUBING STRINGS ABSTRACT OF THE DISCLOSURE 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, means such as 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.

560574

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