Lost Circulation Materials Test Fixture with Geometric Flow Restriction
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Solution Overview
Problem
Existing LCM testing equipment fails to accurately simulate the complex flow dynamics and irregular geometries of natural rock formations encountered in lost circulation zones during wellbore drilling, leading to inadequate evaluation of lost circulation materials.
Innovation Solution
A testing apparatus and system that includes a testing chamber with a flow restriction configured to simulate the geometry of natural geologic formations, allowing for the testing of LCMs under controlled conditions that mimic real-world lost circulation scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional LCM testing equipment is used, then testing can be performed, but the flow dynamics and geometry do not accurately simulate natural rock formations
Solution Approach 1:
The patent creates a physical model (flow restriction element) that copies the essential geometric features of natural rock formations, including irregular shapes, varying aperture sizes, and complex flow paths. This model replica enables accurate simulation of downhole conditions without requiring actual formation material, thus improving measurement precision while maintaining adaptability through scalable modeling.
Solution Approach 2:
The flow restriction element incorporates variable geometric parameters such as aperture size, shape irregularity, and flow path complexity that can be adjusted to match different formation characteristics. By changing these parameters, the system can accurately evaluate LCM performance across多种 geological conditions, resolving the contradiction between precision and adaptability.
2Device complexity
If simple flow paths are used in testing, then device complexity is reduced, but the ability to simulate real lost circulation scenarios is insufficient
Solution Approach 1:
The flow restriction element is nested within a standardized testing chamber assembly, allowing the complex geometric features to be contained within a simple overall device structure. The flow restriction can be removed and replaced independently, maintaining device simplicity while enabling realistic simulation scenarios.
Solution Approach 2:
The complexity is localized to the flow restriction element itself, which contains the irregular geometry and complex flow paths, while the rest of the testing apparatus remains simple and standardized. This local concentration of complexity enables realistic simulation without making the entire device overly complicated.
3Ease of operation
If conventional testing methods are used, then testing procedure is simple, but the evaluation of LCM performance is inadequate
Solution Approach 1:
The flow restriction element is pre-configured with geometric features that replicate natural formation characteristics before testing begins. This preliminary preparation of the test environment ensures that LCM performance is evaluated under realistic conditions without complicating the actual testing procedure, maintaining ease of operation while improving measurement precision.
Data Source
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Figure 3A~3C
AI summary
A testing apparatus for testing a fluid and a loss control material (LCM) is provided. The testing apparatus includes a testing chamber having an upstream end, a downstream end, a device central axis, and a general flow direction. The testing chamber includes a chamber body having an upstream cap, a downstream cap, a first chamber wall, and a second chamber wall. The first chamber wall has a first diameter and in part defines a first chamber interior, the second chamber wall has a second diameter, the first diameter is less than the second diameter, and both the first chamber wall and the second chamber wall are positioned relative to one another such that an annulus is defined in part in between. The traversal of the fluid and the LCM along the fluid flow path is restricted by a flow restriction.