Wireline hydraulic retrieving tool and downhole power generating

Details Wireline hydraulic retrieving tool and downhole power generating Wireline hydraulic retrieving tool and downhole power generating

1993-04-28

1995-03-21

Dang, Hoang C.

Wells

Grapple and well anchored lifting means

166 664, 166301, 294 8618, E21B 3100

Patent

active

053987535

ABSTRACT:
In wireline operations, it is known to retrieve objects stuck in a well bore by means of a retrieving force applied to the object through the wireline and a wireline pulling tool attached to the wireline and engaged with the object. The present invention provides a wireline retrieving tool which is adapted to apply a large retrieving force on a pulling tool engaged with an object in the well bore without having that force transmitted directly through the wireline. The retrieving tool is adapted to be lowered into the well bore on the wireline to a position where the pulling tool engages the stuck object. Anchoring apparatus in the tool then anchor the tool against the tubular casing or tubing of the well bore and a controlled retrieving force generated in the tool is applied between the casing or tubing and the pulling tool to dislodge the object. A wireline power generating apparatus is provided to provide a controlled force in the interior of a well casing in a well bore.

REFERENCES:
patent: 2377249 (1945-05-01), Lawrence
patent: 2537413 (1951-01-01), Lawrence
patent: 2829716 (1958-04-01), Stewart
patent: 2978030 (1961-04-01), Green et al.
patent: 3016954 (1962-01-01), Crowell
patent: 3105547 (1963-10-01), Ownby
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patent: 3147809 (1964-09-01), Thomas
patent: 3211222 (1965-10-01), Myers
patent: 4762175 (1988-08-01), Perricone
patent: 5228507 (1993-07-01), Obrejanu et al.

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