Extendable Downhole Jet Cutting Tool Arms
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Solution Overview
Problem
Existing downhole jetting tools are limited in their ability to reconfigure nozzle extensions, requiring removal and repositioning for use in different well locations, making them time-consuming and costly.
Innovation Solution
A downhole jet cutting tool with extendable and retractable arms actuated by a piston, allowing for consistent nozzle extension and orientation, enabling efficient cutting in various conduit diameters without removing the tool from the well.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If telescoping jetting nozzles are extended to contact the cutting surface, then cutting efficiency is improved, but the nozzles cannot be retracted to their original positions for relocation to new locations
Solution Approach 1:
The jetting nozzles are designed with dynamic extendability, allowing them to be extended telescopically during cutting operations and then retracted back to their original positions. This dynamic capability enables the nozzles to adapt between two states: extended for efficient cutting contact and retracted for tool relocation to new locations.
2Ease of operation
If the tool is removed from the well for resetting the telescoping jetting nozzles, then the nozzles can be reconfigured, but operational time and costs increase
Solution Approach 1:
The tool is designed to perform nozzle reconfiguration self-service within the wellbore environment. The telescoping nozzles can be extended and retracted in-place during operations, eliminating the need for tool removal and external resetting operations, thereby saving significant time and operational costs.
3Device complexity
If fixed extension nozzles are used, then the tool structure is simpler, but the tool cannot adapt to conduits with variable inner diameters
Solution Approach 1:
The tool incorporates dynamically adjustable telescoping nozzles that can extend and retract based on the conduit diameter. This dynamic mechanism allows the same tool to adapt to various conduit sizes without requiring multiple fixed nozzle configurations, maintaining reasonable structural complexity while achieving high versatility.
4Productivity
If the nozzles remain extended after cutting, then they are ready for immediate use, but they cannot be repositioned for movement out of the wellbore
Solution Approach 1:
The telescoping nozzle system provides dynamic control, allowing nozzles to be extended for cutting operations and then retracted for tool withdrawal. This dual-state capability ensures the nozzles are ready for immediate use when extended while enabling easy tool movement when retracted, resolving the contradiction between operational readiness and mobility.
Data Source
AI summary
Downhole fluid jet cutting tools having extendible and retractable arms with cutting heads on the ends are disclosed. The jet cutting tools permit casing and other downhole surfaces to be cut utilizing a cutting fluid forced through a jet nozzle assembly. Movement of a piston slidingly engaged within the passageway of the tool actuates the arms when cutting fluid pressure acts on the piston. As a result, the arms are extended and cutting fluid is forced at high pressure from the passageway to the cutting head where it is expelled through nozzles for cutting casing and the like. The jet cutting tools permit the arms to be extended, retracted, and re-extended or redeployed multiple times without the need for being retrieved from the wellbore.