Rotating Semiterete Rock Core Holder for Fracture Angle Simulation
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Solution Overview
Problem
Current performance testing methods for acid fracturing fluid lack accuracy in simulating the diverse angles of fractures in reservoirs, leading to incomplete and inaccurate flow conductivity tests.
Innovation Solution
A performance testing device featuring semiterete rock core holders with curved faces and a pressure applying shell that allows for rotation, enabling the simulation of fractures at various angles while maintaining consistent pressure application, thereby enhancing the accuracy of flow conductivity tests.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If two rock cores are placed in parallel with a fixed closing pressure to test flow conductivity, then the test setup is simple, but the fracture angle simulation is limited and cannot achieve accurate practical simulation
Solution Approach 1:
The patent applies the dynamics principle by making the rock core holders rotatable about a vertical axis, allowing the closure direction to be dynamically adjusted to simulate fractures at different angles. The holders can rotate to different positions while maintaining closure pressure, enabling the system to adapt to various fracture angle scenarios rather than being fixed in a single configuration.
Solution Approach 2:
The patent implements universality by designing a single testing device that can simulate multiple fracture angles through rotation. The rock core holders are equipped with rotation members that allow them to orient in different directions, making the device capable of testing flow conductivity under various practical fracture conditions rather than being limited to one specific angle.
2Measurement precision
If the rock core holders are made rotatable to simulate various fracture angles, then the simulation accuracy improves, but the device complexity increases
Solution Approach 1:
The patent applies asymmetry by using semiterete rock core holders with a curved face side and a flat face side. The curved face side fits into a corresponding recessed portion on the pressure applying shell, creating an asymmetric connection that guides rotation while maintaining stable closure. This asymmetric design simplifies the rotation mechanism compared to symmetric alternatives.
Solution Approach 2:
The patent uses an intermediary approach by introducing a recessed portion on the pressure applying shell that matches the curved face side of the holder. This intermediary structure facilitates smooth rotation and maintains closure pressure during angle changes, reducing the complexity of the overall rotation mechanism.
3Stability of the object's composition
If pressure is applied to make flat face sides joint in surface contact, then the closure is stable, but the rotation capability is restricted
Solution Approach 1:
The patent applies segmentation by dividing the contact interface into two distinct surfaces: a curved face side and a corresponding recessed portion. This segmentation allows the closure function to be separated from the rotation function, enabling stable surface contact closure while maintaining rotation capability around the vertical axis.
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
The device enables precise simulation of fractures at multiple angles, improving the accuracy and relevance of acid fracturing fluid performance tests by adjusting pressure distribution in accordance with actual stratum stress conditions.
Implementation Method 1
the pressure applying shell are able to apply a pressure to the holders to make the two flat face sides thereof joint in a manner of surface contact
Implementation Method 2
the two semiterete rock core holders are able to rotate about the first rotation axis
Data Source
AI summary
A performance testing device for acid fracturing fluid includes: two semiterete rock core holders, the flat face sides of the two semiterete rock core holders being arranged opposite to each other; the two semicircle sides of the two semiterete rock core holders being provided with a rotation member which is opened with a first groove; the two semiterete rock core holders being able to rotate about a first rotation axis formed corporately by the two rotation members; a pressure applying shell having a recessed portion that matches with the curved face side, the recessed portion being able to cooperate with the curved face side, the pressure applying shell being able to apply a pressure to the two rock core holders to bring the two flat face sides thereof together.