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1. (WO2013154360) WATER LEAK-DETECTING GROUND WATER PRESSURE TESTING APPARATUS

Pub. No.:    WO/2013/154360    International Application No.:    PCT/KR2013/003027
Publication Date: Fri Oct 18 01:59:59 CEST 2013 International Filing Date: Fri Apr 12 01:59:59 CEST 2013
IPC: E21B 47/10
E21B 49/00
G01N 15/08
Applicants: KIM, Yun Seong
김윤성
Inventors: KIM, Yun Seong
김윤성
Title: WATER LEAK-DETECTING GROUND WATER PRESSURE TESTING APPARATUS
Abstract:
The present invention relates to a ground water pressure testing apparatus that is used in a field test for measuring the water permeability of the ground in which an irrigation pipe (20) is installed in a borehole, the test section (L) is sealed by a packer (10), and then water is forced in at a predetermined pressure through the irrigation pipe (20) to calculate the lugeon value by observing the flow rate or the like. A main packer film (13) and an auxiliary packer film (14) are installed to be separated away from each other at both ends of a packer tube (12), and a water leak detection pipe (16) that is connected to the ground is installed in the packer tube (12) in the separated portion so as to detect leaking of the water injected through the irrigation pipe (20) through the main packer film (13) and a borehole wall. According to the present invention, mismeasurements can be detected in real time during the ground water pressure testing, and thus the accuracy of the ground water pressure testing can be improved and effective design and construction are possible in related construction projects.