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1. WO1979001087 - FLUID PRESSURE SET AND RELEASED WELL PACKER APPARATUS

Publication Number WO/1979/001087
Publication Date 13.12.1979
International Application No. PCT/US1979/000336
International Filing Date 17.05.1979
IPC
E21B 23/06 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
23Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
06for setting packers
E21B 33/1295 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
129with mechanical slips for hooking into the casing
1295actuated by fluid pressure
CPC
E21B 23/06
EFIXED CONSTRUCTIONS
21EARTH DRILLING; MINING
BEARTH DRILLING, e.g. DEEP DRILLING
23Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells
06for setting packers
E21B 33/1295
EFIXED CONSTRUCTIONS
21EARTH DRILLING; MINING
BEARTH DRILLING, e.g. DEEP DRILLING
33Sealing or packing boreholes or wells
10in the borehole
12Packers; Plugs
129with mechanical slips for hooking into the casing
1295actuated by fluid pressure
Applicants
Inventors
Priority Data
90712118.05.1978US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) FLUID PRESSURE SET AND RELEASED WELL PACKER APPARATUS
(FR) APPAREIL POUR GARNITURE ETANCHE DE PUITS FIXEE ET DESSERREE PAR LA PRESSION D"UN FLUIDE
Abstract
(EN)
A double grip well bore packer run into a well casing on a pipe string has actuator means responsive to hydrostatic or applied fluid pressure to set anchor slips (24) and deform a packing (23) into engagement with the casing (6), and the setting force is locked into the packing. Pressure differential from below the packer actuates hold-down elements (22) into engagement with the casing. A shearable member (92) is sheared by a shear piston (93) which is normally pressure balanced but rendered unbalanced when a releasing tool (RT) is seated in the packer and operated so that fluid pressure can act on the shear piston and release the packer for retrieval from the well casing.
(FR)
Une garniture etanche d"un alesage d"un puits a double griffe dans un cuvelage de puits sur une colonne de tubage possede des moyens de commande sensibles a la pression d"un fluide hydrostatique ou appliquee pour fixer des glissieres d"ancrage (24) et deformer une garniture (23) en l"engageant avec le cuvelage (6) et la force de fixation est verrouillee dans la garniture. La pression differentielle sous la garniture agit sur des elements de retenue (22) en engagement avec le cuvelage. Un membre cisaillable (92) est coupe par un piston a cisailler (93) qui est normalement equilibre par la pression mais desequilibre lorsqu"un outil de relachement ou du desserrage (RT) est place dans la garniture et mis en fonctionnement de sorte que la pression du fluide puisse agir sur le piston de cisaillement et desserrer la garniture pour la retirer du cuvelage du puits.
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