Multiple cup bridge plug for sealing a well casing and method

Details Multiple cup bridge plug for sealing a well casing and method Multiple cup bridge plug for sealing a well casing and method

1990-06-05

1991-04-30

Novosad, Stephen J.

Wells

Processes

Placing or shifting well part

166134, 166195, 166196, 166202, 166387, E21B 33128, E21B 33129

Patent

active

050109588

ABSTRACT:
A bridge plug for sealing a well casing comprises a plurality of cups which tightly interfit together when a compressive load is applied to both opposite ends of the plurality of cups. Application of the compressive load to both opposite ends of the cups forces a first cup to fit into a second cup, the second cup to fit into a third cup, and the third cup to fit into a fourth cup, etc., thereby producing a single unitary plug which includes a plurality of tightly interfit cups. Further application of the compressive load to both opposite ends causes transverse expansion of the plurality of interfit cups to occur. When the cups contact the well casing wall, a permanent seal is achieved between the cups and the well casing wall. Anchor elements on both sides of the cups contact the well casing wall and permanently hold the interfitting cups in their compressed condition.

REFERENCES:
patent: Re32831 (1989-01-01), Shonrock et al.
patent: 1895905 (1933-01-01), Young
patent: 2207448 (1940-07-01), Ashbrook
patent: 2217038 (1940-10-01), Alley
patent: 2253776 (1941-08-01), Gaunt
patent: 2301191 (1942-11-01), Boynton
patent: 2612953 (1952-10-01), Morgan et al.
patent: 4554973 (1985-11-01), Shonrock et al.

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