E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 21/00 (2006.01)
Patent
CA 2044011
ABSTRACT OF THE DISCLOSURE A method for flushing and dredging a wellbore and equipments therefor are described. The method is easy to practice and is highly effective. According to the method, a high-pressure hose constructed of an inner resin tube and an outer resin sheath and having a jet nozzle at a leading end thereof is lowered into a pipe, which is disposed within the wellbore, through a lubricator arranged in a wellhead equipment. Water is introduced into the high-pressure hose to jet water out through the jet nozzle, whereby water flushes the in- side of the pipe and blows up substances so flushed off and/or materials so dredged up. At the same time, a compressed gas is injected through a gas-lift means provided on the pipe, whereby the flushed-off sub- stances and dredged-up materials are discharged from the wellbore with the aid of the expanding injection gas.
Kume Shinichi
Fetherstonhaugh & Co.
Kanto Natural Gas Development Co. Ltd.
Kume Shinichi
LandOfFree
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