Downhole fixing device and method for drilling layered test sensor

Abstract

The invention belongs to the field of drilling hydrogeological tests, and particularly relates to a downhole fixing device and method for a drilling layered test sensor. The device comprises a wire leading device a, a top packer, a wire leading device b, a P3 sensor, a P2 sensor, a bottom packer, a P1 sensor, a bottom end protection cover and a wire leading device c, wherein the wire leading device a is fixedly connected to the upper portion of the top packer, the wire leading device b is fixedly connected to the lower portion of the top packer, the P3 sensor and the P2 sensor are bundled to the lower portion of the wire leading device b, the top packer and the bottom packer are connected through a pipeline, the wire leading device c is fixedly connected with the top of the bottom packer, the bottom end protection cover is fixedly connected to the bottom of the bottom packer, and the P1 sensor is installed in the bottom end protection cover. According to the downhole fixing device and method for the drilling layered test sensor, the water injection mode of a pressure measuring pipe is optimized, the installation efficiency of the downhole device is improved, and the reliability of the water head pressure of the sensors and the reliability of underground water temperature measurement data are improved.

Description

technical field [0001] The invention belongs to the field of borehole hydrogeological tests, and in particular relates to an underground fixing device and method for a borehole layered test sensor. Background technique [0002] The distribution and flow characteristics of groundwater in underground space are related to the water quality, temperature, recoverable quantity, concentration and distribution range of soluble matter, and the blocking mechanism of oil and nuclide migration in the deep environment. Therefore, the evaluation and development of groundwater resources , investigation and restoration of groundwater pollution, development of geothermal resources, underground water-sealed caverns for petroleum reserves, and site selection for radioactive waste disposal all require the investigation of the distribution of head and temperature of groundwater, the permeability and water-richness of aquifers (zones), and the study of structural conductivity and connectivity. L...

AI Technical Summary

Problems solved by technology

At this time, the groundwater temperature measurement value of the test hole section and the lower hole section is unreliable. In addition, it is difficult to completely empty the air in the piezometric tube during the actual installation process, and the accuracy of the water head pressure measurement value of the test hole section and the lower hole section is inevitably affected. influences

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