Wells – Processes – Placing or shifting well part
Patent
1991-08-05
1993-09-07
Melius, Terry Lee
Wells
Processes
Placing or shifting well part
166242, 166317, E21B 3406
Patent
active
052420221
ABSTRACT:
A method and apparatus for isolating a zone (12) of a wellbore (14) penetrated by a casing (16) and then opening ports (28) in the zone (12) for extraction or injection of fluids is provided. The zone (12) is isolated by inflating jackets (42) and then closing a safety valve (38) by sliding a sliding member (44) relative to a first conduit (46). The ports (28) are opened by sliding a piston (80) of a sliding sleeve valve (76) so that openings (84) therein align with the ports (28). The invention provides improved zone isolation and reduced wear of seals (86) in the sliding sleeve valve (76).
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Burton Guy C.
Eckhart Mickey W.
McCaffrey James F.
McCaffrey Thomas J.
Kontler Peter K.
Melius Terry Lee
Paul Hattich GmbH & Co.
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