Wellbore Gauge Cutter with Shear Pin and Divider for Single-Trip Sampling
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Solution Overview
Problem
Current wellbore tools face challenges in efficiently dislodging and sampling solids from wellbore walls, requiring multiple tools and processes, which are time-consuming and prone to errors, and do not effectively protect and analyze the collected samples during transportation.
Innovation Solution
A wellbore gauge cutter apparatus with a snap ring and shear pin mechanism that allows for both open and closed positions, enabling efficient dislodging and sampling of solids, with a hollow cylindrical divider to separate flow paths and retain samples, and optional sensors for data collection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple tools and processes are used for dislodging and sampling solids, then the sampling function is achieved, but the operation time increases and errors occur
Solution Approach 1:
The patent combines multiple functions (dislodging solids via gauge cutter and sampling solids via bailer) into a single integrated apparatus. The gauge cutter and bailer are coupled together such that one tool performs both cutting and sampling operations simultaneously, eliminating the need for separate tools and reducing operational time while maintaining sampling accuracy.
2Productivity
If samples are collected during transportation, then sampling is achieved, but samples are not protected and cannot be analyzed
Solution Approach 1:
The patent employs a nested structure where the bailer (containing the sample) is positioned within the gauge cutter housing. The bailer is surrounded by a protective cage structure that prevents sample contamination during transportation. This nested arrangement allows the sample to be collected and protected simultaneously, maintaining sample integrity while enabling efficient sampling during the operation.
3Productivity
If a single tool performs both cutting and sampling, then operation time is reduced, but the device complexity increases
Solution Approach 1:
The patent divides the integrated apparatus into distinct functional modules: a gauge cutter section with cutting blades, a bailer section with sampling mechanism, and a coupling mechanism connecting them. Each module is independently designed and can be assembled separately, then coupled together using a simplified connection system. This segmentation reduces overall device complexity while maintaining the productivity benefits of combined operations.
Data Source
AI summary
An apparatus includes a first body, a second body, a shear pin, and a divider. The first body includes a coupling. The second body includes a cutter blade. The shear pin is configured to hold the position of the second body relative to the first body in an open position. The coupling is configured to couple the first body to the second body in a closed position. In the open position, the apparatus defines first and second flow paths for fluids and solids to pass through the apparatus. The first flow path is defined through the first body and through an inner bore of the divider. The second flow path is defined through the first body and through an annulus surrounding the divider. In the closed position, the second flow path is closed, such that solids remain in the annulus surrounding the divider.