Title:
GROUND CORE SAMPLING SYSTEM AND SAMPLING METHOD USING THE SAME
Document Type and Number:
Japanese Patent JP2018131737
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a ground core sampling system allowing a high-quality sampling ground core to be obtained with no need of skill, and a sampling method using the same.SOLUTION: A sampling system of the invention is provided with: pressure means 3 which supplies a tip load to a bit 7 mounted on a lower end of a rod 5 rotatable by a boring device to make the bit to drill the ground; a sampler 6 which is installed at a lower portion of the rod to collect a ground core sample; measuring means 15, 16 to measure the tip load; and control means 20 to control the tip load on the basis of these measured values. The control means 20 in which an upper limit value and a lower limit value of the tip load are preset, adjusts the tip load to enter a range between the upper and lower limit values by controlling the pressing means 3 when the tip load of the bit 7 measured by measuring means 15, 16 exceeds the upper limit value or the lower limit value.SELECTED DRAWING: Figure 2
Inventors:
TANIGAWA MASASHI
Application Number:
JP2017024009A
Publication Date:
August 23, 2018
Filing Date:
February 13, 2017
Export Citation:
Assignee:
OYO CORP
International Classes:
E21B25/00
Domestic Patent References:
JP2016132874A | 2016-07-25 | |||
JPS5482803A | 1979-07-02 |
Foreign References:
US20090078467A1 | 2009-03-26 |
Attorney, Agent or Firm:
Shigeo Naruse