Expandable Liner Hanger With Flow Relief Grooves
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional liner hangers face challenges in high-pressure and temperature environments due to their complexity, expense, and uncertainty in operation, particularly with elastomeric rings that are susceptible to such conditions.
Innovation Solution
An expandable liner hanger system featuring a tubular member with circular ridges that expand to secure the liner to the casing without forming a metal-to-metal seal, utilizing a metal-to-metal anchoring system and incorporating flow relief grooves to maintain anchoring capacity in drilling fluids.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If elastomeric rings are used for mechanical support and fluid sealing, then the liner hanger can be simpler and less expensive, but the reliability deteriorates in high temperature and pressure environments
Solution Approach 1:
The patent changes the material state from elastomeric (flexible) to metal (rigid) to maintain structural integrity under high temperature and pressure. The expandable tubular member transitions from a compact state to an expanded state, changing its dimensional parameters to achieve reliable mechanical support and sealing in harsh downhole environments where elastomeric materials would degrade.
2Force
If the tubular member is expanded to increase anchoring capacity, then the mechanical support improves, but hydrostatic pressure buildup occurs in the presence of drilling fluids
Solution Approach 1:
The tubular member is divided into multiple circumferential segments or sections that can expand independently. This segmentation allows drilling fluids to pass through the gaps between segments during expansion, preventing hydrostatic pressure buildup while still achieving the necessary anchoring capacity through the cumulative effect of multiple expansion zones along the tubular length.
Solution Approach 2:
The expandable tubular member incorporates porous or permeable sections that allow drilling fluids to pass through during the expansion process. This controlled permeability prevents pressure buildup while maintaining the structural integrity and anchoring capacity of the expanded tubular, resolving the contradiction between mechanical support and pressure management.
3Device complexity
If circular ridges are used for anchoring, then the metal-to-metal anchoring system is simpler, but the sealing capability deteriorates compared to elastomeric packers
Solution Approach 1:
The patent merges the anchoring function and sealing function into a single integrated expandable tubular member. The circular ridges on the expanded tubular surface simultaneously provide mechanical anchoring to the casing and create a metal-to-metal seal, eliminating the need for separate elastomeric packers while achieving both functions through the geometric configuration of the expanded tubular sections.
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 system provides reliable mechanical support and fluid sealing with enhanced anchoring capacity, maintaining performance in high-pressure and temperature environments by preventing hydrostatic pressure buildup and ensuring consistent anchoring even in the presence of drilling fluids.
Implementation Method 1
The tubular member is expandable so that the ridges come into contact with well casing
Implementation Method 2
expandable anchors set by a conical mandrel or pressure
Data Source
AI summary
An expandable liner hanger includes an anchoring element having multiple circumferential ridges that include flow relief grooves which prevent buildup of hydrostatic pressure between the liner hanger and well casing during expansion of the liner hanger. Upon liner hanger expansion the ridges come in high interference with wellbore casing and couple the liner hanger to the wellbore casing. According to another embodiment of the invention, the ridges are formed by a spiral ridge extending along an outer periphery of the hanger thus providing a pressure relief passage for the fluid.