Processing

Please wait...

Settings

Settings

Goto Application

1. WO1997030266 - METHOD AND APPARATUS FOR USE IN INFLATING PACKER IN WELL BORE

Publication Number WO/1997/030266
Publication Date 21.08.1997
International Application No. PCT/CA1997/000092
International Filing Date 10.02.1997
Chapter 2 Demand Filed 13.08.1997
IPC
E21B 33/124 2006.01
EFIXED CONSTRUCTIONS
21EARTH OR ROCK DRILLING; MINING
BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
33Sealing or packing boreholes or wells
10in the borehole
12Packers; Plugs
124Units with longitudinally-spaced plugs for isolating the intermediate space
E21B 33/127 2006.01
EFIXED CONSTRUCTIONS
21EARTH OR ROCK DRILLING; MINING
BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
33Sealing or packing boreholes or wells
10in the borehole
12Packers; Plugs
127with inflatable sleeve
CPC
E21B 33/1243
EFIXED CONSTRUCTIONS
21EARTH DRILLING; MINING
BEARTH DRILLING, e.g. DEEP DRILLING
33Sealing or packing boreholes or wells
10in the borehole
12Packers; Plugs
124Units with longitudinally-spaced plugs for isolating the intermediate space
1243with inflatable sleeves
E21B 33/127
EFIXED CONSTRUCTIONS
21EARTH DRILLING; MINING
BEARTH DRILLING, e.g. DEEP DRILLING
33Sealing or packing boreholes or wells
10in the borehole
12Packers; Plugs
127with inflatable sleeve
Applicants
  • McALLISTER PETROLEUM SERVICES, LTD. [CA]/[CA] (AllExceptUS)
  • HOLBERT, Marvin, L. [US]/[CA] (UsOnly)
Inventors
  • HOLBERT, Marvin, L.
Agents
  • PARKS, William, D.
Priority Data
2,169,38213.02.1996CA
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHOD AND APPARATUS FOR USE IN INFLATING PACKER IN WELL BORE
(FR) PROCEDE ET APPAREIL DE GONFLAGE D'UN OBTURATEUR DANS UN FORAGE
Abstract
(EN)
A system for relieving pressurized fluid entrapped in a annular space between a casing (12) and the surrounding wall (11) of a well bore hole (10) during deployment of a packer exterior (14) of the casing (12) for sealing engagement with the wall (11). When a packer (14) is inflated in a zone (17) where fluid is entrapped, such as an intermediate packer between two previously inflated packers (13, 14), the squeeze pressure developed by the inflating packer (14) has been found to be sufficient to prevent effective and lasting sealing of the intermediate packer (14). The present system includes a valve mechanism (35) which is activated by the pressurized fluid providing for inflating the packer (14) to open a passageway (90, 94, 91) to bleed the entrapped fluid into the casing (12) and to then close the passageway (90, 94, 91) as inflation of the intermediate packer (14) is completed.
(FR)
L'invention porte sur un système de dépressurisation du fluide sous pression piégé dans l'espace annulaire compris entre le tubage (12) et la paroi extérieure (11) d'un puits (10) lors de la mise en place d'un obturateur gonflable (14) extérieur au tubage (12) et s'appuyant sur la paroi (11) pour assurer l'étanchéité. Lorsqu'un obturateur (14) est gonflé dans une zone (17) où du fluide est piégé, constituant un obturateur intermédiaire entre deux obturateurs (13, 14) préalablement gonflés, la pression exercée par le gonflage de l'obturateur (14) s'est montrée suffisante pour empêcher une obturation efficace et durable par l'obturateur intermédiaire (14). Ledit système comporte un mécanisme de soupape (35) activé par le fluide sous pression assurant le gonflage de l'obturateur (14), ouvrant un passage (90, 94, 91) permettant la purge du fluide piégé dans le tubage (12), et refermant le passage (90, 94, 91) lorsque le gonflage de l'obturateur intermédiaire (14) est achevé.
Latest bibliographic data on file with the International Bureau