Integrated Retaining Ring and Bushing for Drilling Tools
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Solution Overview
Problem
The existing piston actuated drilling tools require complex machining to maintain tight tolerances for proper assembly and operation, increasing costs and time, due to the separate functions of the retaining system and guide bushing which are often placed in close proximity.
Innovation Solution
An integrated retaining and bushing system within the piston actuated drilling tool, where a retaining ring prevents mandrel detachment and a bushing stabilizes and guides the piston, eliminating the need for tight tolerances and complex machining, and optionally featuring a split retaining ring for easy replacement and secure O-ring assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate retaining ring and bushing components are used in close proximity, then functional requirements are met, but tight tolerances and complex machining are required for proper assembly and positioning
Solution Approach 1:
The patent combines the retaining ring and bushing into a single integrated component that performs both functions simultaneously. The retaining ring portion prevents mandrel detachment while the bushing portion guides and stabilizes the piston, eliminating the need for separate components and tight tolerances between them.
Solution Approach 2:
The integrated component serves multiple functions: it acts as both a retaining mechanism to prevent mandrel detachment and a guiding mechanism to stabilize the piston during reciprocating movement. This multi-functionality reduces the number of parts and eliminates the need for precise tolerance control between separate components.
2Manufacturing precision
If tight tolerances are maintained for separate retaining ring and bushing components, then proper assembly and positioning are achieved, but manufacturing costs and time increase
Solution Approach 1:
By merging the retaining ring and bushing into one integrated component, the patent eliminates the need for tight tolerances between separate parts. The single component is manufactured as a whole, significantly reducing manufacturing complexity, cost, and assembly time while maintaining proper positioning functionality.
3Reliability
If separate retaining ring and bushing components are used, then functional requirements are met, but multiple parts require complex assembly procedures
Solution Approach 1:
The integrated component combines multiple functions into a single part that can be installed as one unit, eliminating complex assembly procedures involving multiple separate components. This simplifies the assembly process while maintaining all necessary functional capabilities.
Data Source
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AI summary
A piston actuated drilling tool comprising a housing, a top sub, a piston and a drive sub; the piston, having a nose at its forward end that is slidably mounted for reciprocating movement within the housing and which strikes a mandrel located at the forward end of the housing; wherein there is an integrated retaining and bushing system that comprises a retaining ring for preventing the mandrel from detaching from the rest of the tool encasing a bushing for co-operation with the piston nose for helping to stabilise and guide the piston and provide a timing event for the percussion.