Split Winder Connection for Downhole Tool Tensile Strength
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Solution Overview
Problem
Existing threaded connections for downhole well intervention equipment face limitations in withstanding high tensile loads due to the reliance on a single shoulder for tensile force support, which is weak and can fail during stuck tool or fishing operations, and they also occupy valuable space without enhancing strength.
Innovation Solution
A split winder connection with a winder ring and collar, featuring internal and external circular parallel grooves and ridges, distributes tensile forces across multiple ridges, providing increased strength without increasing the equipment's diameter or space usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a single shoulder structure is used to support tensile forces in threaded connections, then the structure is simple, but the tensile strength is insufficient and can fail during stuck tool or fishing operations
Solution Approach 1:
The winder is divided into multiple segments (first winder segment and second winder segment) that can be assembled together. Each segment contains grooves and ridges that distribute tensile forces across multiple contact points rather than a single shoulder, thereby increasing tensile strength while maintaining manageable structural complexity through modular assembly
Solution Approach 2:
The invention transitions from a single-point shoulder support to a distributed multi-point support system using grooves and ridges that extend along the axial dimension. This dimensional expansion allows tensile forces to be distributed across multiple surfaces and contact areas, significantly enhancing tensile strength without proportionally increasing overall complexity
2Strength
If the winder collar material thickness is increased to prevent deformation during tightening, then the tensile strength improves, but the outside diameter of the equipment increases occupying valuable space
Solution Approach 1:
The winder is segmented into multiple sections with grooves and ridges that create distributed load paths. This segmentation allows the structure to achieve high tensile strength through force distribution rather than relying on increased material thickness, thereby maintaining a compact outside diameter while preventing deformation during tightening operations
Solution Approach 2:
The grooves and ridges create localized regions of enhanced structural integrity at critical stress points. Instead of uniformly increasing material thickness throughout the winder collar, the invention concentrates structural reinforcement locally where tensile forces are transmitted, optimizing strength-to-diameter ratio
Data Source
AI summary
A winder for a threaded connection of two axially aligned bodies where a first body comprises a male portion at an end connection portion and a second body has a female portion at an end connection portion. The female portion comprises a sleeve with a threaded portion on an internal face. The winder includes a winder ring encircling the male portion. The winder ring forms an internal surface and an external surface having a threaded portion. The internal surface of the winder ring includes a number of parallel grooves that are perpendicular to a rotational axis of the winder ring. A further male portion comprises external, circular grooves complementary to internal, circular ridges of the winder, and a threaded connection between two axially aligned bodies where the connection comprises the winder and the male portion.