Wireline Sheave Tension Measurement with Wireless Transmission
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Solution Overview
Problem
Existing wireline operations face challenges in accurately measuring wireline parameters such as tension and length, particularly with braided wires, which require sophisticated pressure sealing and result in wire fatigue due to multiple bending cycles, and often necessitate separate measuring devices and physical signal transmission.
Innovation Solution
A wireline sheave apparatus with a strain gauge sensor integrated into the sheave mounting, which measures wireline tension by preventing frame parts from pivoting, and includes a transmitter for wireless signal transmission, reducing bending cycles and eliminating the need for separate measuring devices and physical cables.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate measuring devices are used for wireline parameters, then measurement capability is provided, but device complexity increases
Solution Approach 1:
The patent combines multiple measuring functions (depth counter and tension indicator) into a single integrated wireline sheave apparatus. The sheave assembly integrates the depth measuring wheel, tension sensing elements, and wireline guidance functions into one unified structure, eliminating the need for separate measuring devices and reducing overall system complexity.
2Measurement precision
If multiple bending cycles are imposed on wireline, then measurement and control are improved, but wire fatigue increases
Solution Approach 1:
The patent segments the measurement functions from the wireline path. By positioning the depth counter and tension indicator on the sheave assembly rather than requiring multiple bends in the wireline, the design minimizes the number of bending cycles the wireline undergoes while maintaining accurate measurement capabilities.
3Loss of information
If physical cables are used for signal transmission, then data transmission is achieved, but device complexity and potential failure points increase
Solution Approach 1:
The patent replaces mechanical cable connections with wireless transmission technology. The wireline sheave apparatus incorporates wireless transmitters that send measurement data and control signals without physical cable connections, reducing the number of connection points and potential failure modes while maintaining reliable communication.
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
This solution provides accurate and simplified measurement of wireline tension and length, reduces wire fatigue by minimizing bending cycles, and enables wireless data transmission, enhancing operational safety and efficiency.
Implementation Method 1
the sensor comprises a strain gauge which is arranged to measure strain on the load pin
Data Source
Figure 1~2
Figure 3~5
AI summary
A wireline apparatus comprises a sheave for accommodating a wireline and a sheave mounting configured for coupling to a wireline stuffing box. The apparatus includes a sensor for measuring at least one of wireline tension and deployed wireline length at the sheave.