Wells – Packers or plugs – Expanded by confined fluid from central chamber – pump or...
Patent
1991-07-16
1993-04-27
Novosad, Stephen J.
Wells
Packers or plugs
Expanded by confined fluid from central chamber, pump or...
166387, 166386, E21B 33127
Patent
active
052053580
ABSTRACT:
A pipe plugging system useful for plugging oil well pipes for stopping oil flow from an oil well pipe. An inflatable plug is insertable on a tube through the top of the pipe and is inflated by a fluid under pressure released into he plug to expand the plug against the pipe wall. A blocker at the lower end of a carrier conduit expands out to block upward expansion of the flexible plug to force the plug to press against the inside the oil pipe on all sides. A gauge valve is installed on the pipe, to control oil flow, while the well pipe is held shut by the plug. A check valve, installed in the top of the tube, holds pressure in the tube, but is openable by pressure from a remotely controlled valve opening assembly to deflate the plug for tube removal, leaving the pipe closable by the check valve to control flow through the pipe into useful places. A guide removably placed around the tube guides the tube into an oil well casing deep in a pool of oil.
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patent: 3130787 (1964-04-01), Mason
patent: 3301329 (1967-01-01), Martin
patent: 3995694 (1976-12-01), Freiburger
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