Title:
LARGE DEPTH HYDRAULIC TESTING METHOD, EXCAVATOR FOR TEST AND PACKER
Document Type and Number:
Japanese Patent JP3053563
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To carry out low-cost water sampling by performing large-depth boring excavation without using bentonite muddy water, and grasping correct hydraulic characteristics of ground water in a target large-depth area.
SOLUTION: According to an engineering method, while drilling is performed by a drilling bit arranged at the lowermost end part of an excavator to open and close, a casing 11 is inserted in a bored hole, the drilling bit 3 is removed from the casing 11, a cutter is inserted in the casing 11 to cut the casing 11, a packer is arranged in the position of the cut casing, and two packers are fixed to upper and lower sides of the bored hole in the position of height. An outer tube 1 inserted in the casing 11 includes a wing bit 8 capable of freely opening and closing, and the packer inner tube includes a packer rubber and the outer peripheral conical cam.
Inventors:
Shuji Matsumura
Takayuki Iwai
Chihiro Masahiro
Kazuhiro Tanaka
Keiji Iwasaki
Shinichi Miyamoto
Takayuki Iwai
Chihiro Masahiro
Kazuhiro Tanaka
Keiji Iwasaki
Shinichi Miyamoto
Application Number:
JP33620295A
Publication Date:
June 19, 2000
Filing Date:
November 30, 1995
Export Citation:
Assignee:
Kumagai Gumi Co., Ltd.
CENTRAL RESEARCH INSTITUTE OF ELECTRIC POWER INDUSTRY
WBM Co., Ltd.
CENTRAL RESEARCH INSTITUTE OF ELECTRIC POWER INDUSTRY
WBM Co., Ltd.
International Classes:
E21B49/08; E21B7/20; E21B33/12; (IPC1-7): E21B49/08; E21B33/12
Domestic Patent References:
| JP347400B2 | ||||
| JP3310250B1 | ||||
| JP242798Y2 |
Attorney, Agent or Firm:
Tomisaki Motonari (1 person outside)