Pass-through zone isolation packer and process for isolating zon

Details Pass-through zone isolation packer and process for isolating zon Pass-through zone isolation packer and process for isolating zon

1991-05-10

1993-02-09

Melius, Terry Lee

Wells

Packers or plugs

Expanded by confined fluid from central chamber, pump or...

166183, 166387, E21B 33127

Patent

active

051846772

ABSTRACT:
A pass-through zone isolation packer and process for isolating zones in a multiple-zone well. The pass-through zone isolation packer has an upper packer sub with an upper sub through hole and a lower packer sub with a lower sub through hole. A packer mandrel having a through bore is positioned through the upper sub through hole and the lower sub through hole. The upper packer sub and the lower packer sub are secured to the packer mandrel. A packer element is positioned between and is secured to the upper packer sub and the lower packer sub. Likewise, a packer bladder is positioned between the upper packer sub and the lower packer sub. The packer bladder is hermetically sealed to both the upper packer sub and the lower packer sub, so as to form a gas-tight annular gas chamber between the packer mandrel and the packer bladder. An inlet tube is used to introduce a pressurized gas through the upper packer sub and into the annular gas chamber. For the purpose of positioning at least one pass-through zone isolation packer above a dual zone isolation packer mounted within a multi-zone well, the pass-through zone isolation packer has a pass-through conduit which is routed through the upper packer sub, within the annular gas chamber and through the lower packer sub. The zone isolation packer devices are positioned in a well so that fluid flow between, above and below each device can be measured by selectively inflating and deflating packer bladders and measuring differences in gas flows from one configuration to another.

REFERENCES:
patent: 3493045 (1970-02-01), Bassani
patent: 3764235 (1973-10-01), Bitterman
patent: 3899631 (1975-08-01), Clark
"Lynes Production-Injection Packer (PIP.TM.)", eleven pages, promotional literature.
Rock Creek Methane From Multiple Coal Seams Completion Project, Annual Report, Jan. 1989-Dec. 1989, Gas Research Institute, 8600 W. Bryn Mawr Av., Chicago, Ill. 60631, pp. 244 and 250.

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