Annular Chassis Shock Reduction via Bumper Pads
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Solution Overview
Problem
Downhole drilling tools experience shock and vibration damage due to gaps between the chassis and collar, leading to reduced reliability and increased risk of failure, which existing technologies have not adequately addressed.
Innovation Solution
The implementation of annular chassis designs with minimized gaps and the use of clamps, bumper pads, and alignment features to provide multiple points of support and reduce relative motion between the chassis and collar, thereby enhancing shock and vibration reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gaps are minimized between chassis and collar, then shock and vibration reduction is improved, but manufacturing precision requirements increase
Solution Approach 1:
Bumper pads are introduced as intermediary elements between the chassis and collar to minimize gaps and reduce shock transmission. These pads act as mediators that fill the gap space and provide controlled contact points, resolving the contradiction by achieving gap minimization through an intermediate component rather than requiring tight manufacturing tolerances.
Solution Approach 2:
The system changes the physical state and positioning parameters of the bumper pads (axial, circumferential, radial positions) to optimize gap minimization and shock reduction performance. By adjusting these parameters, the system achieves reliable shock and vibration reduction while accommodating manufacturing tolerances.
2Reliability
If multiple support points are provided between chassis and collar, then reliability is improved, but device complexity increases
Solution Approach 1:
The support system is segmented into multiple discrete bumper pads distributed at different locations (axial, circumferential, radial positions) between the chassis and collar. This segmentation provides multiple support points that enhance tool stability and reliability while keeping each individual component simple and manageable.
Solution Approach 2:
The bumper pads are nested within the existing tool structure, fitting into spaces between the chassis and collar without requiring major structural changes. This nesting approach adds multiple support points while minimizing the increase in overall device complexity.
3Reliability
If clamp and bumper pads are used to reduce relative motion, then shock reduction is enhanced, but ease of manufacture decreases
Solution Approach 1:
The bumper pads are pre-positioned and secured to the chassis at specific locations before final assembly with the collar. This preliminary action ensures proper positioning and reduces relative motion effectively, while the modular design allows for simplified assembly procedures during final tool assembly.
Data Source
AI summary
Systems, methods, tools, and kits are used to reducing shocks and vibrations in tools, including downhole drilling tools. In at least some embodiments, shock and vibration reduction can be enhanced within tools that include an annular chassis within a collar. Existing locations where a gap exists are identified, and clamps, alignment features, joints, or other components can be modified or included to reduce the gap between the chassis and the collar. This includes a tool in which the chassis includes a flow tube or other tool with an axis that is offset from the axis of the chassis. Minimizing the gap can include providing three-point contact, which stabilizes the internal component within the collar. In a downhole environment, a downhole tool that includes the collar and chassis can perform a drilling or other downhole operation, and the internal vibration within the collar is reduced.