Well Column Pipe Retrieval Tool With Moveable Clamping Segment
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Solution Overview
Problem
Existing tools for retrieving well column pipes from below ground level often apply excessive clamping pressure, leading to breakage of plastic pipes, which causes the pipe to fall back into the casing during retrieval.
Innovation Solution
A well column pipe retrieval tool featuring a 'U' bracket with a moveable lower clamping segment and friction-enhancing protuberances, designed to grip the pipe without excessive pressure, allowing for safe upward retrieval by dispersing weight and maintaining pipe integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional pipe wall clamping members are used to grip the pipe during retrieval, then the pipe can be securely held for extraction, but excessive localized clamping pressure is applied that crushes or breaks the upper end of plastic pipes
Solution Approach 1:
The pipe wall clamping members are segmented into multiple separate clamping surfaces arranged around the pipe circumference. This segmentation distributes the clamping force across multiple contact points rather than concentrating it at single points, thereby securing the pipe for retrieval while preventing localized crushing or breaking of the plastic pipe wall.
Solution Approach 2:
The clamping members feature localized friction-enhancing protuberances or textured surfaces at specific contact points with the pipe. This local quality modification increases the coefficient of friction at the clamping interface, allowing secure gripping of the pipe with reduced overall clamping force, thus preventing pipe damage while maintaining reliable holding.
2Reliability
If a moveable lower clamping segment with protuberances is used, then frictional contact is enhanced for secure gripping, but the device complexity increases compared to simple clamping members
Solution Approach 1:
The lower clamping segment is designed as a moveable component that can dynamically adjust its position and apply clamping force in response to pipe engagement. This dynamic mechanism allows the clamping force to be automatically regulated during pipe retrieval, enhancing gripping reliability through friction while keeping the overall device complexity manageable through simple mechanical motion.
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 tool effectively retrieves broken well column pipes by securely gripping the pipe without causing further damage, ensuring successful extraction and preventing re-breakage during lifting.
Implementation Method 1
The slope of the slide slot preferably extends at an angle which assures that the interconnected moveable segment normally slides both downwardly and inwardly or toward the 'U' bracket's throat. The downward and throatward travel bias imposed by the slide slot upon the oppositely lateral arm's moveable segment assures that the pull of gravity upon such segment normally moves the segment toward a broken upper end of column pipe received with the 'U' bracket's throat.
Implementation Method 2
In order to enhance frictional contact between the 'U' bracket's moveable segment and such column pipe's wall, a multiplicity of knurles, teeth or protuberances are preferably formed upon the moveable segment.
Data Source
AI summary
A well column pipe retrieval tool incorporating a “U” bracket having a lateral arm and an oppositely lateral arm, wherein the oppositely lateral arm has a fixed segment and a moveable segment; the column pipe retrieval tool further incorporating a column pipe receiving throat which is laterally bounded by the “U” bracket's lateral arm, and which is oppositely laterally bounded by the oppositely lateral arms' moveable segment; the column pipe retrieval tool further incorporating a plurality of pin and angled slide slot combinations which interconnect the oppositely lateral arm's fixed and moveable segments.