Fishing Tool Receiver Locking Collar Axial Translation Prevention
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Solution Overview
Problem
Fishing tool receivers experience disassembly and weakening due to mechanical stresses during high-impact or high-vibration operations in wellbore operations, leading to instability and potential detachment of the fishing neck or boot from the wireline cable.
Innovation Solution
A fishing tool system with a multi-piece body configuration, utilizing pins for coupling and a collar with a biasing member to prevent axial translation, ensuring secure assembly and reduced likelihood of disassembly, featuring a collar that circumferentially surrounds the fishing neck body and includes a recess and groove alignment with a biasing member for enhanced stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fishing neck or boot is fastened to a wireline cable using bolts during high-impact or high-vibration operations, then the fishing tool receiver can be assembled and conveyed to gather data in the wellbore, but the bolts may loosen or detach due to mechanical stresses, causing the fishing neck or boot to weaken or detach
Solution Approach 1:
The fishing neck body is divided into multiple segments (first body portion and second body portion) that are coupled together through an interface. This segmentation allows for modular assembly while maintaining structural integrity through the locking collar mechanism that secures the segments together during high-vibration operations.
Solution Approach 2:
The locking collar is pre-configured with a biasing member that applies continuous locking force to the interface between body portions before high-vibration conditions occur. This preliminary action ensures that the fishing neck remains securely assembled during conveyance and data gathering operations, preventing bolt loosening or detachment.
2Reliability
If a locking collar with biasing member is added to prevent axial translation and secure the fishing neck body, then assembly stability is improved, but the device complexity increases
Solution Approach 1:
The locking collar combines multiple functions into a single integrated component: it circumferentially surrounds the fishing neck body, houses the biasing member, provides the locking interface, and prevents axial translation. This merging of functions reduces the need for separate components while maintaining reliability.
Solution Approach 2:
The biasing member within the locking collar provides self-actuating locking force that automatically maintains the secured position of the fishing neck body portions. The biasing member's elastic or spring-loaded mechanism continuously applies locking pressure without requiring external control systems or additional actuation mechanisms.
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 system facilitates easier assembly and maintains stability during operations, reducing the risk of disassembly and detachment, thereby ensuring the fishing tool receiver remains securely attached to the cable, even under mechanical stress conditions.
Implementation Method 1
a biasing member configured to be disposed within the third recess and in contact with the corresponding groove to couple the collar to the fishing neck body and prevent the collar from axially translating with respect to the fishing neck body
Data Source
AI summary
The present disclosure is directed to a fishing head and a steel boot of a downhole receiver tool. In certain embodiments, the fishing head may include multiple body portions that include a channel to hold a cable of a downhole tool and a recess that is formed at the interface of the body portions. The body portions may be coupled via one or more pins that are fitted into the recess. In certain embodiments, a collar may be positioned on an exterior portion of the body portions of the fishing head to further secure the components. In certain embodiments, the collar may be coupled to the body portions of the fishing head via a biasing member such as a spring pin or other suitable coupling components.