Overshot tool and method

Details Overshot tool and method Overshot tool and method

2009-08-06

2011-11-29

Neuder, William P (Department: 3672)

Wells

Processes

Assembling well part

C166S098000, C166S301000

Reexamination Certificate

active

08066078

ABSTRACT:
An overshot tool is provided for interconnecting and sealing between a lower tubular (C) in a well and an upper tubular (30). A tubular expander sleeve (36) and an overshot sleeve (26) are supported in a well on an upper tubular. The tool housing (60) encloses a plurality of axially stacked pistons (58, 68, 74), which generate an axial force to move the expander sleeve downward and radially expand a portion of a lower tubular to seal between an outer diameter of the lower tubular and an inner diameter of the overshot sleeve.

REFERENCES:
patent: 4023847 (1977-05-01), Webb
patent: 4127297 (1978-11-01), Dufrene
patent: 5054833 (1991-10-01), Bishop et al.
patent: 5690170 (1997-11-01), Hailey et al.
patent: 6425615 (2002-07-01), Mullane, Jr.
patent: 7278492 (2007-10-01), Braddick
patent: 7422068 (2008-09-01), Lynde
patent: 7493946 (2009-02-01), Filippov et al.
patent: 7503388 (2009-03-01), Fay et al.
patent: 2008/0053656 (2008-03-01), Lynde

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