Satellite Magnetic Coupling for High-Pressure Safety Valve
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Solution Overview
Problem
Existing magnetically coupled safety valves for subterranean wells face challenges in maximizing magnetic coupling force and pressure resistance within limited wellbore space, necessitating improvements for higher pressure ratings.
Innovation Solution
The design incorporates multiple satellite magnetic devices reciprocably disposed in longitudinally extending chambers of a pressure bearing wall, magnetically coupled to a primary magnetic device attached to the operating member, enhancing magnetic coupling force and pressure resistance by using a structurally rigid, non-magnetic housing with circumferentially spaced chambers and optional inner and outer walls for increased structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a single magnetic device is used in the safety valve, then the device complexity is low, but the magnetic coupling force is insufficient for high-pressure environments
Solution Approach 1:
The magnetic device is segmented into multiple satellite magnetic devices (first, second, third satellite magnetic devices) distributed around the wellbore circumference, each contributing to the total magnetic coupling force. This segmentation allows the system to achieve higher cumulative magnetic force while maintaining a modular structure that can be systematically arranged in the limited wellbore space.
Solution Approach 2:
Multiple satellite magnetic devices are combined with a central operating member to form an integrated magnetic coupling system. The magnetic forces from all satellite devices merge to provide sufficient coupling strength for high-pressure environments, while the combined structure operates as a unified mechanism for opening and closing the safety valve.
2Stress or pressure
If the safety valve is designed for higher pressure ratings, then the pressure resistance improves, but the space required in the wellbore increases
Solution Approach 1:
The satellite magnetic devices are nested within the wellbore circumference, arranged concentrically around the central operating member. This nested configuration maximizes the use of available radial space while keeping the overall footprint compact, allowing high-pressure rating capability without proportionally increasing the wellbore volume required.
Solution Approach 2:
The magnetic devices are arranged in a circumferential dimension around the wellbore rather than extending axially. This dimensional arrangement allows the system to achieve high pressure resistance through distributed magnetic force around the circumference without significantly increasing the axial length or radial footprint, thus maintaining compactness in the wellbore environment.
3Force
If multiple satellite magnetic devices are added to increase magnetic coupling force, then the magnetic coupling force improves, but the device complexity increases
Solution Approach 1:
Each satellite magnetic device serves multiple functions: generating magnetic coupling force, providing structural support, and contributing to the overall pressure resistance of the system. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity despite adding multiple magnetic devices.
Solution Approach 2:
The satellite magnetic devices are positioned at specific circumferential locations optimized for magnetic field distribution and structural efficiency. This localized arrangement ensures that each device contributes maximally to the overall magnetic coupling force while maintaining a regular, manageable pattern that does not excessively complicate the device design.
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 configuration increases magnetic coupling force and pressure resistance, allowing for effective operation of the safety valve in high-pressure environments while maintaining compactness, thereby improving the reliability and efficiency of subterranean well operations.
Implementation Method 1
magnetically coupled safety valve with satellite inner magnets
Data Source
AI summary
A safety valve can include multiple magnetic devices reciprocably disposed in respective longitudinally extending chambers, and a another magnetic device magnetically coupled to the first magnetic devices. The first magnetic devices may be circumferentially spaced apart and encircled by the second magnetic device. Another safety valve can include multiple longitudinally extending chambers and multiple magnetic devices. Each of the magnetic devices may be reciprocably disposed in a respective one of the chambers, and the magnetic devices may be attached to an operating member of the safety valve.