Full bore nipple and associated lock mandrel therefor

Details Full bore nipple and associated lock mandrel therefor Full bore nipple and associated lock mandrel therefor

1997-02-11

1999-02-02

Neuder, William

Wells

Processes

Placing or shifting well part

166115, 166217, E21B 2360

Patent

active

058652558

ABSTRACT:
An improved full bore nipple and associated lock mandrel provides enhanced sealing capability in tubing strings positioned in subterranean wells. In a described embodiment of the full bore nipple, a nipple body has a recessed seal surface and a latch profile formed on an internal bore of the body. In a described embodiment of the lock mandrel, an expander sleeve radially outwardly expands a circumferential seal to sealingly engage the recessed seal surface, locks a series of keys into the latch profile, and displaces another seal to sealingly engage an outer housing, when the expander sleeve is displaced axially downward relative to an inner mandrel of the lock mandrel.

REFERENCES:
patent: 4418750 (1983-12-01), Paschal, Jr.
patent: 4997038 (1991-03-01), Welch
patent: 5348087 (1994-09-01), Williamson, Jr.
patent: 5390735 (1995-02-01), Williamson, Jr.
patent: 5617918 (1997-04-01), Cooksey et al.

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