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Title: Valve assembly for inflatable packer

Abstract

This patent describes a valve assembly for controlling the flow of fluid from within casing into a bladder element of an inflatable packer for use in a wellbore. The bladder element has bladder port means. The valve assembly is mountable within a single cavity in a body member in the wall of casing or a casing coupling. The body member has casing port means communicating with the cavity for communicating casing fluid to the bladder port means so that the casing fluid can flow through the bladder port means to inflate the bladder element and the body member having overpressure port means communicating with the cavity for communicating part of the fluid flowing into the bladder element back to the cavity and to the valve assembly. The valve assembly comprises: control piston means movably mounted within the cavity, restraint means for insuring that the control piston means initially moves only when the pressure of the casing fluid reaches a predetermined level, and closing piston means movably mounted within the cavity and responsive to the pressure of the fluid in the bladder element, and the control piston means and the closing piston movable about stem means disposed in the cavity.

Inventors:
Publication Date:
OSTI Identifier:
5394173
Patent Number(s):
US 4711301
Assignee:
Weatherford U.S. Inc., Houston, TX
Resource Type:
Patent
Resource Relation:
Patent File Date: Filed date 5 Sep 1985
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; 03 NATURAL GAS; NATURAL GAS WELLS; PACKINGS; OIL WELLS; VALVES; DESIGN; CAVITIES; FLUID FLOW; OPERATION; PISTONS; WELL COMPLETION; CONTROL EQUIPMENT; EQUIPMENT; FLOW REGULATORS; WELLS; 020300* - Petroleum- Drilling & Production; 030300 - Natural Gas- Drilling, Production, & Processing

Citation Formats

Stringfellow, W D. Valve assembly for inflatable packer. United States: N. p., 1987. Web.
Stringfellow, W D. Valve assembly for inflatable packer. United States.
Stringfellow, W D. Tue . "Valve assembly for inflatable packer". United States.
@article{osti_5394173,
title = {Valve assembly for inflatable packer},
author = {Stringfellow, W D},
abstractNote = {This patent describes a valve assembly for controlling the flow of fluid from within casing into a bladder element of an inflatable packer for use in a wellbore. The bladder element has bladder port means. The valve assembly is mountable within a single cavity in a body member in the wall of casing or a casing coupling. The body member has casing port means communicating with the cavity for communicating casing fluid to the bladder port means so that the casing fluid can flow through the bladder port means to inflate the bladder element and the body member having overpressure port means communicating with the cavity for communicating part of the fluid flowing into the bladder element back to the cavity and to the valve assembly. The valve assembly comprises: control piston means movably mounted within the cavity, restraint means for insuring that the control piston means initially moves only when the pressure of the casing fluid reaches a predetermined level, and closing piston means movably mounted within the cavity and responsive to the pressure of the fluid in the bladder element, and the control piston means and the closing piston movable about stem means disposed in the cavity.},
doi = {},
url = {https://www.osti.gov/biblio/5394173}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1987},
month = {12}
}