Yieldable Landing Feature with Stress Riser for Wellbore Objects
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Solution Overview
Problem
In the resource recovery and fluid sequestration industry, landing features often require objects of varying sizes, with larger objects needing excessive force to pass through features designed for smaller ones, potentially damaging equipment.
Innovation Solution
A yieldable object landing feature with a first object landing region for smaller objects and a second object landing region featuring a stress riser to initiate crack formation, allowing larger objects to pass with similar pressure to smaller objects, and optionally including a reduced bending resistance portion for easier passage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a landing feature is configured for a smaller first object, then the first object can pass through with moderate pressure, but a larger second object requires very large force to move through the same feature
Solution Approach 1:
The landing feature is divided into multiple landing regions (first landing region for smaller objects, second landing region for larger objects). Each region is optimized for specific object sizes, allowing the system to handle multiple object types without requiring excessive force for any single object type.
Solution Approach 2:
Different portions of the landing feature have different structural properties. The first landing region has uniform structure for smaller objects, while the second landing region includes a stress riser (reduced bending resistance portion) specifically designed to facilitate passage of larger objects with reduced force requirements.
2Ease of operation
If pressure is raised against a larger object to force it through a feature designed for smaller objects, then the object can pass through, but equipment damage risk increases
Solution Approach 1:
The stress riser is pre-formed in the landing feature structure before the larger object arrives. This preliminary structural modification ensures that when the larger object is pressed against the landing region, the stress concentration at the stress riser initiates crack formation that facilitates object passage, preventing the need for excessive pressure that would damage equipment.
3Force
If a stress riser is added to the second object landing region to initiate crack formation, then larger objects can pass with reduced pressure, but the structure becomes more complex
Solution Approach 1:
The stress riser modifies the structural parameters of the landing feature by creating a localized region of reduced bending resistance. This parameter change (reduced thickness or modified geometry in the stress riser region) creates a stress concentration point that initiates controlled crack formation, enabling larger objects to pass through with significantly reduced pressure requirements.
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
Enables the use of multiple-sized objects in wellbore operations without requiring significantly different overpressures, reducing the risk of equipment damage and facilitating staged fracture operations with varying functions.
Implementation Method 1
a stress riser disposed to initiate crack formation in the second object landing region
Data Source
AI summary
Yieldable object landing feature including a first object landing region configured to receive and support a first size object, a second object landing region configured to receive and support a second size object, and a stress riser disposed to initiate crack formation in the second object landing region.