Method and apparatus for reducing wellbore-fluid pressure differ

Details Method and apparatus for reducing wellbore-fluid pressure differ Method and apparatus for reducing wellbore-fluid pressure differ

1993-03-30

1994-03-29

Dang, Hoang C.

Wells

Processes

Placing or shifting well part

166183, 166184, 166187, 166319, E21B 2306, E21B 33127, E21B 3410

Patent

active

052976343

ABSTRACT:
An apparatus is provided for use in a wellbore for reducing the effects of pressure differential forces which act on settable wellbore tools suspended therein. The apparatus operates to provide a bypass fluid flow path through the settable wellbore tool for directing wellbore fluid through the settable wellbore tool in response to pressure differentials developed across the settable wellbore tool during outward radial expansion of the tool. The apparatus further includes mechanisms for maintaining the bypass fluid flow path in an open condition during at least an expansion mode of operation to diminish the effects of pressure differential developed across the settable wellbore tool. The apparatus also includes mechanisms for closing the bypass fluid flow path once a setting mode of operation is obtained.

REFERENCES:
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patent: 4188998 (1980-02-01), Upton
patent: 4535843 (1985-08-01), Jageler
patent: 4749037 (1988-06-01), Christensen
patent: 4796707 (1989-01-01), Halbardier
patent: 4923007 (1990-05-01), Sanford et al.
patent: 4953617 (1990-09-01), Ross et al.
patent: 5040600 (1991-08-01), Bailey et al.

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