Title:
DEVICE FOR PREVENTING BUCKLING OF CONDUIT FORMING BODY
Document Type and Number:
Japanese Patent JP2017137709
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a device for preventing buckling of a conduit forming body in which the block or release of the buckling of the conduit forming body can be performed freely.SOLUTION: A device for preventing buckling of a conduit forming body includes: a ring body 3 capable of being mounted to a well head of a drilling hole; and a stopper part 4 disposed along an inner circumference of the ring body 3, having the tip end 12 sliding to an outer wall of the conduit forming body in the propelling of the conduit forming body through the ring body 3, having the tip end 12 being pressed and locked to the outer wall of the conduit forming body when pressed and biased in the back direction to the conduit forming body, and having the tip end 12 capable of being separated to the outer wall of the conduit forming body in the regression of the conduit forming body.SELECTED DRAWING: Figure 1
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Inventors:
HIJIGURO HIDEKI
SHIMIZU AKITO
FUJIHA FUMITAKA
NAKAZONO AKIRA
SHIMIZU AKITO
FUJIHA FUMITAKA
NAKAZONO AKIRA
Application Number:
JP2016019797A
Publication Date:
August 10, 2017
Filing Date:
February 04, 2016
Export Citation:
Assignee:
DAIWA KENKI KAIHATSU CO LTD
International Classes:
E21D9/06