Isolating Mule Shoe Axial Vibration Damping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Hydrocarbon recovery systems face challenges in protecting sensitive electronics from repetitive vibrations and shock vibrations, as existing vibration-resistant housings and active isolation systems are either inadequate or expensive, and conventional alignment hubs fail to effectively dampen these vibrations.
Innovation Solution
The introduction of an isolating mule shoe with an axial isolator comprising a landing sleeve, upper and lower adapters, and shear units made of elastomeric materials, which provides a passive, soft spring-mass system to effectively isolate vibrations across a wide frequency range, including both low and high frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If passive elastomeric isolators are used, then vibration isolation effectiveness is improved, but device complexity increases
Solution Approach 1:
The isolating mule shoe divides the vibration isolation function into multiple independent elastomeric isolator elements arranged in parallel. Each isolator element independently handles vibration isolation, allowing the system to achieve effective isolation across multiple frequencies while maintaining modular simplicity. The segmentation of the UBHO sub into isolated sections connected by these elastomeric elements enables vibration damping without requiring a completely complex redesign of the entire system.
Solution Approach 2:
The patent changes the physical parameters of the isolators by using elastomeric materials with specific durometer ratings (e.g., 60-80 Shore A) and configuring them in series and parallel arrangements. This parameter optimization allows the passive isolators to effectively isolate vibrations across a wide frequency range (including both low and high frequencies) while keeping the overall device complexity manageable through material selection rather than mechanical complexity.
2Strength
If conventional rigid alignment hubs are used, then structural strength is improved, but vibration damping capability deteriorates
Solution Approach 1:
The isolating mule shoe employs composite construction by combining rigid components (steel bodies, adapters, and structural elements) with elastomeric materials (vibration isolators). The rigid UBHO sub body maintains structural strength for mechanical support, while the elastomeric isolators provide vibration damping. This composite approach allows the system to simultaneously achieve both high structural strength and effective vibration isolation across different frequency ranges.
3Reliability
If active vibration isolation systems are used, then vibration protection is improved, but cost increases
Solution Approach 1:
The patent implements self-service vibration isolation using passive elastomeric isolators that automatically dampen vibrations without requiring external power sources, control systems, or active components. The elastomeric materials inherently provide vibration isolation through their material properties, eliminating the need for expensive active vibration control systems while maintaining effective protection for sensitive electronics and MWD/LWD devices throughout the wellbore drilling operation.
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 isolating mule shoe effectively reduces vibrations, protecting sensitive electronics by providing axial vibration and shock damping, ensuring reliable operation of devices like MWD and LWD in hydrocarbon recovery systems without the high cost of active systems.
Implementation Method 1
an axial isolator coupled to the landing sleeve, the axial isolator comprising: an upper external adapter; an upper inner sleeve; an upper shear unit coupled to an outer surface of the upper inner sleeve and coupled to an inner surface of the external adapter; a lower external adapter; a lower inner sleeve axially coupled to the upper inner sleeve; and a lower shear unit coupled to an outer surface of the lower inner sleeve and coupled to an inner surface of the external adapter
Implementation Method 2
at least a portion of the isolator module received within the substantially conical bore is bonded to at least a portion of the substantially conical bore via an elastomeric material
Data Source
AI summary
Systems and methods are disclosed that include providing an isolating mule shoe having an integrated axial isolator coupled to a landing sleeve of a drill string at an upper end of the axial isolator. The axial isolator includes an elastomeric component that is coupled between a first component and a second component. The first component and the second component are configured to displace axially with respect to one another as a result of a force imparted upon the landing sleeve to provide vibration control.