Retrieval device

Details Retrieval device Retrieval device

1985-09-11

1987-03-03

Leppink, James A.

Wells

Processes

Producing the well

175236, 175245, E21B 4312

Patent

active

046468439

ABSTRACT:
A retrieval device, suitable among other uses for lifting solid and liquid materials from underground locations, comprises a generally cylindrical section, a plurality of projecting members extending from said generally cylindrical section and hinged or otherwise flexibly secured thereto so as to be capable of movement between a first position in which they are aligned with the surface of said generally cylindrical section and a second position in which they are inclined inwards towards the axis of the cylinder, and flexible webs extending between adjacent projecting members.

REFERENCES:
patent: 2646845 (1953-07-01), Schillinger
patent: 2649710 (1948-12-01), Dale
patent: 2670800 (1954-03-01), Stohn
patent: 2672200 (1950-03-01), Patterson
patent: 2890756 (1959-06-01), Middleton
patent: 3807234 (1974-04-01), Duperon
patent: 3874465 (1975-04-01), Young et al.

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