Liner Hanger Setting Tool Radial Expansion
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Solution Overview
Problem
Conventional methods for installing liner strings in subterranean wellbores often fail to securely anchor and seal the liner hanger within the casing string, leading to instability and potential fluid leakage due to incomplete expansion or failed setting operations.
Innovation Solution
A liner hanger setting tool equipped with an expansion cone assembly and a locator cylinder is used to radially expand the liner hanger into contact with the casing string, utilizing a mechanically or hydraulically actuated anchor assembly to ensure secure anchoring and sealing, even in cases where previous setting operations have failed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional setting methods are used to install liner hanger, then the installation process is simple, but the anchoring and sealing reliability is insufficient leading to fluid leakage
Solution Approach 1:
The setting tool is divided into distinct functional modules: an expansion cone assembly for radial expansion, a locator cylinder for positioning, and an anchor assembly for securing the liner hanger. This segmentation allows each component to perform its specific function optimally while maintaining overall system reliability without excessive complexity.
Solution Approach 2:
The locator cylinder performs preliminary positioning of the expansion cone assembly against the liner hanger before the actual expansion operation. This preliminary action ensures proper alignment and contact, preventing failed setting operations and improving anchoring reliability from the outset.
2Reliability
If incomplete expansion of liner hanger occurs, then the setting operation is quick, but fluid leakage and wellbore instability occur
Solution Approach 1:
The expansion cone assembly changes the radial dimension parameter of the liner hanger by applying controlled radial force during expansion. This parameter change ensures the liner hanger achieves sufficient radial expansion for proper sealing and anchoring, preventing fluid leakage while maintaining efficient installation through controlled deformation.
Solution Approach 2:
The expansion cone assembly utilizes a conical (curved) geometry to apply radial expansion force uniformly around the liner hanger. This curved surface ensures complete and even expansion of the liner hanger, achieving reliable sealing integrity without requiring multiple operations or excessive time.
3Reliability
If previous setting operations fail, then re-installation is needed, but time and resources are wasted
Solution Approach 1:
The anchor assembly provides a backup anchoring mechanism that engages if the primary expansion method fails to securely set the liner hanger. This beforehand cushioning ensures that even if the initial setting operation is unsuccessful, the system can still achieve reliable anchoring without requiring complete re-installation, thereby reducing time loss and improving overall success rate.
4Stability of the object's composition
If liner hanger is not securely anchored, then installation is easier, but wellbore stability and fluid containment are compromised
Solution Approach 1:
The liner hanger is nested within the casing string, and the setting tool is subsequently nested within the liner hanger during the setting operation. This nested configuration allows the expansion cone assembly to access and expand the liner hanger from the inside, achieving secure anchoring and wellbore stability while maintaining relatively simple installation procedures through concentric positioning.
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 solution effectively anchors and seals the liner hanger within the casing string, preventing fluid leakage and ensuring wellbore stability, and can be used for both primary and re-expansion operations, applicable in various wellbore orientations and environments.
Implementation Method 1
axially moving the expansion cone assembly through the liner string to radially expand the liner hanger into contact with the casing string
Data Source
Figure 1
Figure 2A~4A
Figure 2B~4B
AI summary
A liner installation system for use in a wellbore having a casing string disposed therein. The system includes a liner string having a liner hanger and a liner top and a setting tool having an expansion cone assembly and a locator cylinder. After running the liner string through the casing string such that at least the liner hanger is positioned within the wellbore casing, the setting tool is run through the casing string until the locator cylinder contacts the liner top. Thereafter, axially moving the expansion cone assembly through the liner string radially expands the liner hanger into contact with the casing string.