Title:
BORING METHOD FOR WELL
Document Type and Number:
Japanese Patent JP3488887
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To improve efficiency in execution of work by a method wherein an inner pipe and an outer pipe are extracted with a specified process and a protective pipe is buried after boring is made to a specified depth with a rotary percussion double pipe boring device, and a pumping pipe is inserted into the protective pipe.
SOLUTION: An inner pipe is extracted out of a bored hole 11 bored to a specified depth, and a protective pipe 9 is inserted up to a specified depth into outer pipes 7 remained under the ground. Then, the outer pipes 7 are extracted successively, and burying material 12 is thrown into a place, wherefrom the outer pipes 7 are extracted, through a space between the outer pipes 7 and the protective pipe 9, and the space between the protective pipe 9 and the bore wall is entirely filled with the burying material. Then, a pumping pipe is inserted into the protective pipe 9 up to a specified depth, and a pump is connected to the pumping pipe. The burying material 12 is formed in a manner wherein a filter member made of gravels in relatively large grain size is laid at the lowermost part, a sealing member made of sand in small grain size is laid in the middle and a solidifying material such as cement milk is laid at the uppermost part, thereby boring a deep well even at a restricted space with a small, lightweight machine.
Inventors:
Eguchi Engineering
Application Number:
JP33102595A
Publication Date:
January 19, 2004
Filing Date:
November 27, 1995
Export Citation:
Assignee:
Japan Home Water System Co., Ltd.
International Classes:
E03B3/08; E21B43/00; (IPC1-7): E21B43/00; E03B3/08
Domestic Patent References:
| JP60148989A | ||||
| JP34841B1 | ||||
| JP66860B2 | ||||
| JP52776B2 |
Attorney, Agent or Firm:
Masami Hattori (2 outside)