Sub-surface release plug assembly with primary and secondary rel

Details Sub-surface release plug assembly with primary and secondary rel Sub-surface release plug assembly with primary and secondary rel

1992-11-16

1995-02-28

Britts, Ramon S.

Wells

Pistons, fluid driven into well

166192, 166184, E21B 3316

Patent

active

053928520

ABSTRACT:
A sub-surface release plug assembly for use in cementing an outer casing annulus around a well casing comprising a top plug releasably connected to a drill string by a collet mechanism and a bottom plug releasably attached to the top plug by a sleeve assembly extending through the top plug. The assembly further comprises primary and secondary release means for releasing said plugs thereby ensuring that the plugs are released in said casing during cementing operations.

REFERENCES:
patent: 3796260 (1974-03-01), Bradley
patent: 4809776 (1989-03-01), Bradley
patent: 4934452 (1990-06-01), Bradley
patent: 4966236 (1990-10-01), Braddick
patent: 5018579 (1991-05-01), Braddick
patent: 5052488 (1991-10-01), Fraser, III

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