Title:
METHOD FOR REMOVING CONTAMINANT ON INNER FACE OF PIPELINE
Document Type and Number:
Japanese Patent JP2018155092
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To shorten a removing (cleaning) time of a contaminant in a pipeline and to reduce a use amount of a pressure-fed fluid.SOLUTION: A method for removing a contaminant on an inner face of a pipeline comprises: putting a pig 20 from a part (a launcher L) of a pipeline A into the pipeline; pressure-feeding a fluid from the part of the pipeline into the pipeline, to move the pig 20 in the length direction of the pipeline; peeling a contaminant on an inner face of the pipeline by friction of the pig with the inner face of the pipeline; and taking out the pig and the peeled contaminant together with the fluid out of another part (a catcher C) of the pipeline. Multiple pigs 20 can be used in a manner that before a preceding pig reaches the another part of the pipeline, a following pig is moved from the part of the pipeline successively, independently and freely (feeding pigs successively). At this time, the following pig is made harder than the preceding pig, and/or a diameter of the following pig is made larger than that of the preceding pig. By feeding the pigs successively, cleaning time can be shortened and a use amount of the pressure-fed fluid can be reduced.SELECTED DRAWING: Figure 1
Inventors:
SHIMOMURA JUN
MICHIURA YOSHISADA
HIRATA SHOICHI
HAZAMA MASAYA
FUJIMOTO MITSUNOBU
YAMAMOTO MASAKAZU
MICHIURA YOSHISADA
HIRATA SHOICHI
HAZAMA MASAYA
FUJIMOTO MITSUNOBU
YAMAMOTO MASAKAZU
Application Number:
JP2018047866A
Publication Date:
October 04, 2018
Filing Date:
March 15, 2018
Export Citation:
Assignee:
KURIMOTO LTD
NIPPON SUIKI CHOSA KK
NIPPON SUIKI CHOSA KK
International Classes:
E03B7/09; B08B9/055
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Attorney, Agent or Firm:
Naoya Kamata
Bunji Kamada
Yaichiro Nakatani
Takayoshi Tagawa
Takashi Shimizu
Bunji Kamada
Yaichiro Nakatani
Takayoshi Tagawa
Takashi Shimizu