A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
EXCAVATION TOOL AND EXCAVATION METHOD
A drilling tool of the invention includes an air supply pipe inserted through an inner circumference of a drilling pipe having a tip portion on which a tool main body is disposed. The air supply pipe being configured to supply compressed air. A supply channel is provided on an outer circumference of the drilling pipe. A discharge channel is formed on the tip portion of the tool main body. The discharge channel is configured to discharge cuttings generated together with the drilling fluid into a space between the drilling pipe and the air supply pipe. An exhaust gas outlet opening into the space is formed at a tip portion of the air supply pipe.
EXCAVATION TOOL AND EXCAVATION METHOD
A drilling tool of the invention includes an air supply pipe inserted through an inner circumference of a drilling pipe having a tip portion on which a tool main body is disposed. The air supply pipe being configured to supply compressed air. A supply channel is provided on an outer circumference of the drilling pipe. A discharge channel is formed on the tip portion of the tool main body. The discharge channel is configured to discharge cuttings generated together with the drilling fluid into a space between the drilling pipe and the air supply pipe. An exhaust gas outlet opening into the space is formed at a tip portion of the air supply pipe.
EXCAVATION TOOL AND EXCAVATION METHOD
AUSGRABUNGSWERKZEUG UND AUSGRABUNGSVERFAHREN
OUTIL D'EXCAVATION ET PROCÉDÉ D'EXCAVATION
TANAKA KUNIHIKO (author) / NAKAMURA KAZUYOSHI (author) / TOMITA YASUTAKA (author)
2019-09-25
Patent
Electronic Resource
English
EXCAVATION CHIP, EXCAVATION TOOL, AND METHOD FOR MANUFACTURING EXCAVATION CHIP
| European Patent Office | 2019
EXCAVATION CHIP, EXCAVATION TOOL, AND METHOD FOR MANUFACTURING EXCAVATION CHIP
| European Patent Office | 2017