Wells – Packers or plugs – With expanding anchor
Patent
1987-06-15
1988-08-02
Novosad, Stephen J.
Wells
Packers or plugs
With expanding anchor
166 64, 166382, 166385, E21B 2302, E21B 3312
Patent
active
047608803
ABSTRACT:
The present invention in its preferred embodiment comprises a combination anchor including a first tubular member having a circular shoulder formed around the perimeter of its bore. Adapted to be releasably inserted inside the tubular member is a bullplug comprising a cylindrical shaped plug member with a rounded bottom section and a seat ring adapted to be threadedly connected to the top section of the plug member. Adapted to be connected to the seat ring and plug member by means of cooperating threads is a mandrel. A conical member having a plurality of compressible legs depending therefrom is insertable over the mandrel and secured thereon by a cap member which fits over the conical member and may be attached thereto by means of cooperating threads. Threadedly connected to the top of the cap and extending upwardly into the bore of the tubing string is a rod, which is more commonly known in the trade as a rod sub. At the end of this rod sub is the male counterpart of a locking device known as a J-latch pin. In the seated position, and shoulder formed in the bore of the first tubular member creates an impervious seal through means of its direct and secure engagement with the depending legs of the conical member on the top and the seat ring situated below.
REFERENCES:
patent: 2613746 (1952-10-01), Whitney
patent: 2671512 (1954-03-01), Ragan et al.
patent: 2816613 (1957-12-01), Minter et al.
patent: 2922477 (1960-01-01), Wall, Jr. et al.
patent: 3756316 (1973-09-01), Ruth
patent: 4488597 (1984-12-01), Hoppe et al.
Lichfield Steve
Novosad Stephen J.
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