BMG-Reinforced Downhole Seals for HTHP Extrusion Resistance
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Solution Overview
Problem
Elastomeric seals used in downhole applications degrade under high temperature high pressure (HTHP) conditions, leading to extrusion, fracture, and reduced mechanical properties due to gas absorption, chemical sensitivity, and erosion, which conventional fillers and plasticizers fail to adequately address.
Innovation Solution
Incorporation of bulk metallic glass (BMG) particles into elastomeric materials to form a BMG-elastomer composite that maintains mechanical properties and resistance to extrusion, abrasion, and chemical degradation, utilizing amorphous structure and superplastic flow for improved sealing performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional fillers (carbon black, silica) are used to reinforce elastomeric seals, then strength and extrusion resistance are improved, but elongation deteriorates
Solution Approach 1:
The patent uses bulk metallic glass (BMG) particles as a novel reinforcement filler in elastomeric seals. BMG particles provide superior strength and extrusion resistance while maintaining elongation properties, overcoming the limitations of conventional fillers like carbon black and silica which degrade elongation. The composite material combines the ductility of elastomers with the high strength of BMG particles.
2Stability of the object's composition
If plasticizers are used to maintain elongation, then elongation is improved, but mechanical properties deteriorate over time due to leaching
Solution Approach 1:
The patent eliminates plasticizers from the elastomeric seal formulation by using BMG particle reinforcement instead. This removes the source of the problem (plasticizer leaching) while still achieving the desired elongation properties through the BMG-elastomer composite structure, thereby maintaining reliability over time.
3Reliability
If elastomeric seals are used under HTHP conditions, then sealing function is achieved, but mechanical properties deteriorate due to temperature and pressure
Solution Approach 1:
The patent creates a BMG-elastomer composite material where BMG particles reinforce the elastomeric matrix, providing exceptional resistance to HTHP conditions. The composite maintains modulus, strength, and elongation under high temperature and pressure, preventing extrusion and fracture that occur with conventional elastomeric seals.
4Reliability
If elastomeric seals are used under HTHP conditions, then sealing function is achieved, but extrusion resistance deteriorates
Solution Approach 1:
The BMG-elastomer composite material provides superior extrusion resistance under HTHP conditions. The high-strength BMG particles within the elastomeric matrix prevent the seal from being forced into clearance gaps under large pressure differentials, solving the extrusion problem that plagues conventional elastomeric seals.
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 BMG-elastomer composite exhibits enhanced strength, modulus, and elongation, resisting extrusion and maintaining integrity under extreme conditions, with improved resistance to gases, water, and chemicals, and maintaining sealing effectiveness across a wide range of temperatures and pressures.
Implementation Method 1
utilizing amorphous structure and superplastic flow for improved sealing performance
Implementation Method 2
resisting extrusion and maintaining integrity under extreme conditions, with improved resistance to gases, water, and chemicals
Data Source
AI summary
In general, in one aspect, embodiments relate to an apparatus that includes a downhole tool, that includes one or more sealing elements that includes a bulk metallic glass (BMG) elastomer composite material.