Wells – Packers or plugs – With expanding anchor
Patent
1980-01-07
1981-08-18
Novosad, Stephen J.
Wells
Packers or plugs
With expanding anchor
166123, 166131, 166134, 166182, E21B 33128, E21B 33129
Patent
active
042841372
ABSTRACT:
An instrument hanger for use in tubing is disclosed with an anti-kick, anti-fall running tool. In one embodiment, the tool includes an internal mandrel, an external sleeve, with the mandrel being tapered wherein the external sleeve supports upwardly pointed detents and downwardly pointed detents against the taper which detents prevent untimely fall of the tool and untimley upward movement thereof.
The tool combination includes a packer element including a set of expandable slips or collet fingers functioning in conjunction with the packer to expand and plug the tubing string. Further tool combination may support an instrument package such as a downhole pressure measuring mechanism used to obtain downhole pressure readings after isolating above a particular zone.
The tool combination further includes a valved flow path across the packer element which is selectively released at the time of release of the tool combination which vents any bottom hole pressure differential and enables retrieval of the tool combination. During retrieval, the instrument package cannot be dropped because the anti-fall detents are set against prefall.
REFERENCES:
patent: 1739928 (1929-12-01), Thompson
patent: 2850097 (1958-09-01), Bloom
patent: 3026941 (1962-03-01), Muse
patent: 3054454 (1962-09-01), Evans
patent: 3233453 (1966-02-01), Lebourg
patent: 3235017 (1966-02-01), Lynes
patent: 3282343 (1966-11-01), Tausch
patent: 3398795 (1968-08-01), Elliston
patent: 3412790 (1968-11-01), Brown
patent: 3412802 (1968-11-01), Kisling
patent: 3746090 (1973-07-01), Read et al.
Matthews Guy E.
Novosad Stephen J.
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