Shock Reduction Tool for Downhole Electronics
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Solution Overview
Problem
Downhole tools, particularly those with sensitive electronics, face significant damage from vibration and shock during drilling, leading to reduced lifespan and increased maintenance costs.
Innovation Solution
A shock reduction tool that incorporates a universal bore hole orientation (UBHO) mule shoe and spring-based mechanisms to absorb and dampen axial and torsional vibrations, maintaining the angular orientation of downhole electronics while allowing axial travel, thereby reducing the transmission of shock and vibration to the electronics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electronics are mounted in downhole tools to perform sensing and measurement functions, then the tool can gather critical drilling data, but the electronics are vulnerable to damage from vibration and shock during drilling
Solution Approach 1:
A shock reduction tool is introduced as an intermediary component between the drill string and the electronics package. This tool includes a body with a bore, a universal bore hole orientation (UBHO) mule shoe, and a shock collar that can rotate relative to the body, creating a decoupling mechanism that reduces vibration and shock transmission to the electronics
Solution Approach 2:
The shock reduction tool employs dynamic elements including a rotatable shock collar and spring mechanisms that allow controlled movement and rotation. The shock collar can rotate relative to the tool body, and springs are positioned to allow axial travel, enabling the system to dynamically respond to and absorb shock loads rather than rigidly transmitting them
2Measurement precision
If the electronics are rigidly mounted to maintain precise angular orientation, then measurement accuracy is improved, but shock and vibration transmission to the electronics increases
Solution Approach 1:
The system uses a rotatable shock collar that can rotate relative to the tool body on a rotational axis, and springs that allow axial travel. This dynamic configuration maintains precise angular orientation through the UBHO mule shoe while allowing the collar and springs to absorb shock loads through controlled rotation and compression, decoupling orientation stability from shock transmission
Solution Approach 2:
The shock reduction tool is divided into separate functional segments: a tool body, a rotatable shock collar, spring elements, and a UBHO mule shoe. This segmentation allows each component to perform its specific function - the body provides structural support, the collar handles rotational shock, the springs absorb axial shocks, and the mule shoe maintains orientation - while working together to reduce overall shock transmission
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 extends the life cycle of downhole electronics by minimizing the impact of drilling-induced vibrations and shocks, reducing fatigue and wear, and simplifying the integration with existing drill string designs.
Implementation Method 1
spring-based mechanisms to absorb and dampen axial and torsional vibrations
Implementation Method 2
spring-based mechanisms to absorb and dampen axial and torsional vibrations
Data Source
AI summary
A tool string disposed in at least one tubular having upper and lower threaded connections to connect to a drill string. The tool string includes a shock reduction tool, which includes an anchoring tail piece axially and rotationally fixed to the at least one tubular. A universal bore hole orientation (UBHO) muleshoe sub is disposed at an upper end of the shock reduction tool. A downhole electronics package coupled to the UBHO muleshoe sub.