Precompressed Elastomeric Isolator for Downhole Vibration
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Solution Overview
Problem
Existing vibration isolation systems for downhole operations, such as those in hydrocarbon recovery systems, often fail to effectively protect sensitive electronics from both repetitive vibrations and shock vibrations, leading to damage and interference with the operation of devices like MWD and LWD, and active systems are costly.
Innovation Solution
The implementation of a vibration isolation system comprising an outer housing, an inner member, precompressed compression compliance components (CCC), and precompressed rebound compliance components (RCC), which are disposed between the outer housing and the inner member to bias it axially, providing a soft spring mass system that isolates the isolated mass from vibrational perturbations and attenuates shocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If passive vibration resistant housings are used, then the device structure is simple and cost is low, but the electronics are not adequately protected from both repetitive and shock vibrations
Solution Approach 1:
The isolator is divided into distinct functional segments: an outer housing, an inner member, compression compliance components (CCC) for axial compression protection, and rebound compliance components (RCC) for shock vibration protection. Each segment handles specific vibration characteristics, allowing the system to protect against multiple vibration types while maintaining manageable complexity through modular design
Solution Approach 2:
The isolator employs composite compliance components combining elastomeric materials with metallic elements. The CCC and RCC use composite construction with elastomeric layers bonded to metallic plates, creating a multi-material system that provides both compliance for vibration isolation and structural integrity for shock protection
2Reliability
If active vibration isolation systems are used, then the electronics are well protected from vibration, but the cost increases significantly
Solution Approach 1:
The isolator is a passive, self-regulating system that automatically adapts to vibration conditions without external control. The elastomeric compliance components inherently provide the necessary compliance and damping forces through their material properties, eliminating the need for power-consuming sensors, actuators, and control systems while maintaining effective vibration protection
Solution Approach 2:
The isolator replaces expensive active vibration isolation systems with inexpensive passive elastomeric compliance components. These elastomeric elements can be manufactured at low cost using conventional molding processes, making the overall isolation system economically viable while providing adequate protection for the electronics
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
This configuration effectively isolates sensitive electronics from harmful vibrations and shocks, reducing the risk of damage while maintaining operational accuracy and reducing costs compared to active systems.
Implementation Method 1
a precompressed compression compliance component (CCC) and a precompressed rebound compliance component (RCC), which are disposed between the outer housing and the inner member to bias it axially
Data Source
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AI summary
An isolator (200) has an outer housing (224) comprising an outer housing bore (234), an inner member (240) received coaxially within the outer housing (224), a precompressed compression compliance component (CCC) (230) disposed between the outer housing (224) and the inner member (240), the CCC (230) being configured to bias the inner member (240) in an axial direction, and a precompressed rebound compliance component (RCC) (232) disposed between the outer housing (224) and the inner member (240), the RCC (232) being configured to bias the inner member (240) in an opposite axial direction.