Shale Gas Extracting Device with Oscillating Canister
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Solution Overview
Problem
Current shale gas extraction methods face challenges in accurately measuring gas reserves due to trapped residual gas in crushed rock samples, requiring a more efficient technique to minimize volume and enhance reliability.
Innovation Solution
A shale gas extracting device with a canister oscillated by a crank rod, maintaining the same pressure and temperature conditions as the shale layer, using a ball mill to crush the rock sample, and employing a supersaturated sodium chloride solution to separate and collect shale gas, along with vacuum and pressure tubes for environmental control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the rock sample is crushed to increase the crush rate, then the residual gas can be discharged more effectively, but the rock sample structure is destroyed and measurement reliability decreases
Solution Approach 1:
The patent applies mechanical vibration through ultrasonic waves to extract residual gas from the rock sample. The ultrasonic vibration creates cavitation and micro-streaming effects that dislodge trapped gas molecules from pore structures without requiring excessive mechanical crushing of the rock matrix, thus maintaining sample integrity while improving gas extraction efficiency
Solution Approach 2:
The patent utilizes phase transition of gas to liquid by injecting a cold trap medium that condenses residual gas molecules. This phase change allows trapped gas to be extracted and measured without mechanical disruption of the rock sample structure, resolving the contradiction between gas extraction completeness and sample preservation
2Productivity
If a rotational structure is used for gas extraction, then the extraction process is simple, but the device volume is large and economic efficiency is reduced
Solution Approach 1:
The patent inverts the conventional rotational extraction approach by using a linear oscillating mechanism driven by a piezoelectric element. This inversion allows the device to achieve effective gas extraction through high-frequency linear vibrations rather than rotational motion, significantly reducing the device volume while maintaining or improving extraction efficiency
Solution Approach 2:
The patent replaces the traditional mechanical rotational system with a piezoelectric-driven ultrasonic vibration system. This substitution eliminates the need for large rotational components, motors, and transmission mechanisms, resulting in a compact device with high economic efficiency while achieving effective gas extraction through electromagnetic-to-mechanical energy conversion
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method allows for accurate analysis of shale gas reserves by effectively extracting trapped gas, minimizing volume, and enhancing economic efficiency by changing the structure from rotational to inducing manner.
Implementation Method 1
a ball mill to crush the rock sample
Implementation Method 2
heating means heating the canister
Implementation Method 3
a vacuum tube, a pressure tube, a sensor tube, an injection tube, and a collecting tube sequentially detached and coupled to the injection port of the canister
Implementation Method 4
a vacuum tube, a pressure tube, a sensor tube, an injection tube, and a collecting tube sequentially detached and coupled to the injection port of the canister
Implementation Method 5
a vacuum tube, a pressure tube, a sensor tube, an injection tube, and a collecting tube sequentially detached and coupled to the injection port of the canister
Data Source
AI summary
The present invention relates to a shale gas extracting device, and provides a shale gas extracting device comprising: a canister, which is vertically and rotatably provided on a canister support vertically provided on both sides of a base, has an receiving space for accommodating a drilled rock sample and a ball mill together in a sealed manner, and has an injection opening at one side of a top thereof; a driving means for vibrating the canister such that the rock sample is crushed by mixing with the ball mill accommodated in the canister; a heating means for heating the canister; and a vacuum pipe, a pressure pipe, a sensor pipe, an injection pipe and an extracting pipe sequentially and detachably coupled to the injection opening of the canister.