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Drainage device and method for gas pressure measurement in downhole drilling

A technology of drilling through layers and drainage devices, which is applied in the directions of gas discharge, drainage, safety devices, etc., to achieve the effect of avoiding losses

Active Publication Date: 2018-04-10
ANHUI UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the drainage problem when measuring the gas pressure through the downward hole in the water-bearing coal rock, and provide a kind of downward hole pressure measurement and drainage with high reliability, more accuracy, stronger applicability and easy operation. Device and method

Method used

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  • Drainage device and method for gas pressure measurement in downhole drilling
  • Drainage device and method for gas pressure measurement in downhole drilling
  • Drainage device and method for gas pressure measurement in downhole drilling

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Embodiment Construction

[0016] The present invention will be described in detail below in conjunction with the accompanying drawings and specific examples.

[0017] Such as figure 1 As shown, the device of the present invention includes: drainpipe (1), hydraulic cylinder (2), piston head (3), drain pipe (4), rack (5), gear (6), handle (7), fixed Support (8), support 1 (9), support 2 (10), pressure measuring tube (11), flower eye tube (12), pressure gauge (13), gate valve 1, 2, 3 (14, 15, 16), piston rod (17), limit block (18), the hydraulic cylinder (2), piston head (3), drain pipe (4), rack (5), gear (6), handle (7 ), fixed support (8), support 1 (9), support 2 (10), gate valve 1, 2, 3 (14, 15, 16), piston rod (17), limit block (18) Constitute the drainage device independently designed by the present invention; the hydraulic cylinder (2) is cylindrical, its central axis is placed horizontally, supported by the support 1 (9), and the limit block (18) is installed inside, and its bottom surface is s...

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Abstract

The invention discloses a drainage device and a drainage method for gas pressure measurement in downward cross hole drilling. The drainage device comprises a drainage tube, a hydraulic cylinder, a piston head, a piston rod, a limiting block, a blow-off pipe, a rack, a gear, a handle, two supports, a fixing support, a pressure measuring tube, a pressure gauge, three gate valves and pored pipe. The drainage device and the drainage method mainly aim to solve the problem the pressure of a coal seam gas is not correct to measure since a drilled hole has pressurized water, the pressure measuring tube has accumulated water, and the like when the pressure of the coal seam gas of a conventional downward cross hole is measured is solved; according to the drainage method, water inside a pressure measurement gas chamber is pumped out by using the piston head, the gas pumped out together with the water is filled back to the pressure measurement gas chamber through the pressure measuring tube, then the pressure measuring tube can be dredged, and then the pressure of the gas inside the pressure measurement gas chamber can be tested; by adopting the drainage device, not only is water inside the pressure measurement gas chamber discharged out on premise that the gas inside the pressure measurement gas chamber is not lost, but also the pressure measuring tube is dredged, and the problem caused by water when the pressure of the gas inside the downward cross hole of a coal seam can be solved.

Description

technical field [0001] The invention relates to the field of coal seam drilling pressure measurement and drainage, in particular to a drilling drainage device and method for measuring coal seam gas pressure through downward holes. Background technique [0002] Coal seam gas pressure is an important basic parameter to measure the occurrence state of coal seam gas, and it is also an important parameter that must be known in the process of gas control at the coal mine site. [0003] The pressure measurement of the downward hole through the bed is one of the commonly used coal seam gas pressure test methods. However, when there is water in the rock cracks of the roof of the test coal seam, the pressure measurement of the gas chamber through the downward hole will cause the gas pressure measurement due to the inflow of crack water. Inaccurate. [0004] At present, the drainage methods and devices in the downward hole gas drainage process mainly include: 1, a kind of downward dra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F16/00E21F7/00
CPCE21F7/00E21F16/00
Inventor 唐明云李平张睿卿张士环张纯如戴广龙秦汝祥高盼军李蒙周亮杨应迪李尧斌徐华礼
Owner ANHUI UNIV OF SCI & TECH
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