Drill String Damper System for Downhole Shock and Vibration
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Solution Overview
Problem
Drilling equipment and sensors in oil and natural gas production are susceptible to harsh downhole environments, including high temperatures, shock, and vibration, which affect their reliability and longevity.
Innovation Solution
A damper system comprising vibration and shock absorbing components, such as vibration dampers, transverse shock dampers, and axial dampers, is used to mount sensitive components within a mechanical chassis in a housing, providing comprehensive protection against mechanical shocks and vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sensors and tools are deployed in harsh downhole environments for drilling operations, then data collection and drilling capability are improved, but reliability and longevity are reduced due to shock and vibration
Solution Approach 1:
The patent applies beforehand cushioning by incorporating vibration dampers and shock absorbers that are pre-installed within the drill string structure before deployment. These damping elements are positioned to intercept and absorb shock waves and vibrations generated during drilling operations, protecting sensitive sensors and tools from damage while maintaining drilling productivity in harsh downhole environments
2Reliability
If vibration dampers and shock absorbers are added to protect sensitive components, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent merges multiple protection functions into a unified damper system integrated within the drill string structure. Vibration dampers and shock absorbers are combined and positioned to simultaneously protect multiple sensitive components (sensors, tools) from various types of mechanical stress, thereby improving reliability without proportionally increasing overall device complexity
Solution Approach 2:
The damper system acts as an intermediary between the harsh external environment (shock and vibration sources) and the sensitive internal components. The vibration dampers and shock absorbers serve as mediating elements that absorb and dissipate mechanical energy, preventing direct transmission of harmful forces to sensitive instruments while maintaining a relatively simple overall system architecture
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 damper system enhances the reliability and longevity of sensitive components by reducing the impact of drilling-related shocks and vibrations, improving data quality and accuracy during drilling operations by minimizing noise and vibration transmission.
Implementation Method 1
a vibration damper, disposed between the mechanical chassis and the housing such that the vibration damper reduces vibration transmitted to the mechanical chassis
Implementation Method 2
a transverse shock damper, disposed radially between the mechanical chassis and the housing such that the transverse shock damper absorbs transverse shock loads
Implementation Method 3
an axial shock damper, disposed between opposite axial ends of the mechanical chassis and the housing such that the axial shock damper absorbs axial shock loads
Data Source
AI summary
A technique facilitates protection of a sensitive component, e.g. a well tool component, against shock and vibration. The sensitive component may be positioned in a mechanical chassis which is mounted in a housing. The mechanical chassis is mounted in the housing via a damper system which may comprise various vibration and shock absorbing components, such as a vibration damper, a transverse shock damper, and/or an axial damper. In drilling applications, the housing may be coupled into a drill string although the damper system may be used in other types of applications.