Expandable Wedge Slip for Variable Casing Anchoring
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Solution Overview
Problem
Existing downhole tools face challenges in anchoring within wellbores due to variations in casing diameters, as current anchoring apparatuses are either too small for larger casings or too large for smaller casings, making it difficult to effectively seal and stabilize tools across different well operations.
Innovation Solution
An expansion apparatus comprising a wedge, an expandable wedge, and a slip ring with radially expanding segments that interact to securely engage the well casing, allowing for adjustable anchoring and sealing in varying diameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed-size anchoring apparatus is used, then it can adequately anchor in one specific casing size, but it cannot adapt to different casing diameters
Solution Approach 1:
The anchoring apparatus is divided into multiple wedge segments that can be distributed around the central axis. These segments can independently expand and contract, allowing the apparatus to adapt to different casing diameters while maintaining a manageable structural complexity. Each segment functions as an independent unit that contributes to the overall anchoring capability.
Solution Approach 2:
The anchoring apparatus transitions from a static fixed-size structure to a dynamic expandable structure. The wedge segments can change their radial position and configuration in response to different casing diameters, enabling the apparatus to adapt its size and shape to match the specific wellbore conditions while providing reliable anchoring.
2Adaptability or versatility
If an expandable wedge mechanism is added to enable adaptation to different casing sizes, then adaptability improves, but the device complexity increases
Solution Approach 1:
The sealing function and anchoring function are merged into a single integrated apparatus. The same wedge segments that provide anchoring through radial expansion also create the sealing action against the casing wall. This combination eliminates the need for separate sealing elements, reducing overall device complexity while maintaining adaptability to different casing sizes.
Solution Approach 2:
The wedge segments serve multiple functions simultaneously: they provide structural support, enable radial expansion for size adaptation, create sealing against the casing, and facilitate anchoring through friction engagement. This multi-functionality reduces the number of separate components needed, thereby managing device complexity while achieving versatile adaptability.
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 apparatus provides reliable anchoring and sealing capabilities across different well operations by expanding to fit various casing sizes, ensuring the downhole tool remains securely positioned and functional.
Implementation Method 1
The wedge segments move radially outward by interaction with the wedge
Implementation Method 2
The plurality of slip segments are disposed about the central axis and expandable radially outward by interaction with the expandable wedge
Data Source
AI summary
An expansion apparatus for anchoring a downhole tool in a well is provided. The expansion apparatus has a wedge, an expansion wedge and a slip ring. The wedge and expansion wedge interact so as to radially expand wedge segments of the expansion wedge. The slip ring and expansion wedge interact so as to radially expand the slip ring to grippingly engage the wellbore or casing.