Magnetostrictive Power Generator for Downhole Signal Integrity
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Solution Overview
Problem
Current data transmission rates from downhole tools to the surface are insufficient for utilizing all acquired data, leading to inefficiencies in drilling operations, and existing power generation methods for booster amplifier systems in drilling operations face signal loss issues.
Innovation Solution
A power generation system utilizing magnetostrictive materials, where an inner sleeve with a variable helical formation is rotated within a drill string to strain the magnetostrictive material, generating electrical power from fluid flow, and an amplifier/booster system is placed along the drill string to maintain signal integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If magnetostrictive materials are used in booster amplifier systems, then signal strength is maintained throughout the drill string, but power generation capability is insufficient
Solution Approach 1:
The patent applies the dynamics principle by making the inner sleeve rotatable within the outer body, allowing the magnetostrictive material to dynamically respond to fluid flow-induced rotation. This rotation causes cyclic strain on the magnetostrictive material, generating electrical power through magnetostriction. The variable helical formation enhances this dynamic effect by impinging fluid flow to create rotational motion, thereby improving power generation capability while maintaining signal strength.
2Loss of information
If current data transmission systems are used, then data can be transmitted from downhole tools, but transmission rates are insufficient for complete data utilization
Solution Approach 1:
The patent applies the self-service principle by using the natural fluid flow in the drill string to directly drive the power generation mechanism. The fluid flow itself provides the rotational force needed to strain the magnetostrictive material, eliminating the need for external power sources or complex mechanical drive systems. This self-powered approach enables high-speed data transmission by providing sufficient power to booster amplifiers along the drill string, thereby achieving complete data utilization without sacrificing transmission rate.
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 system achieves high-speed data transmission rates, enabling the complete use of downhole data and maintaining signal strength throughout the drill string, thereby improving data acquisition efficiency and reliability.
Implementation Method 1
a magnetostrictive material disposed proximate to the inner sleeve, arranged to be strained due to a rotation of the inner sleeve... the rotation strains the magnetostrictive material, generating an electrical current in the conductor
Implementation Method 2
the inner sleeve comprises a variable helical formation extending from a surface of the inner sleeve so that at least a portion of the fluid flow impinges upon the helical formation
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
A system to harvest energy from fluid flow includes: an outer body including a flowway; an inner sleeve rotatably coupled to the outer body; and a magnetostrictive material disposed proximate to the inner sleeve to be strained due to a rotation of the inner sleeve in response to a fluid flow in the flowway.