Subsea Grease Accumulator Visual Indicator and Auto-Switching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing subsea grease accumulators lack a visual indicator for when they are near empty, leading to potential equipment failure due to inadequate grease supply, and require shutdown for replacement, which can cause pressure issues and equipment damage.
Innovation Solution
A grease accumulator apparatus with an internal plunger and end cap assembly that includes an indicator member to visually signal when the accumulator is near empty, and an automatic switching system to seamlessly transfer grease flow to a new bottle when the old one is depleted, ensuring continuous operation and safe replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If grease accumulators are replaced at periodic intervals, then grease supply reliability is improved, but operational downtime and productivity are reduced
Solution Approach 1:
The patent employs a level indicator that provides visual feedback on grease accumulation status. This allows operators to replace accumulators based on actual grease levels rather than fixed schedules, eliminating unnecessary shutdowns while ensuring grease supply reliability is maintained through timely replacement based on real-time status information.
Solution Approach 2:
The level indicator system enables the accumulator to inform operators of its own status without requiring manual inspection or complex monitoring systems. The visual indicator serves as a self-reporting mechanism that guides maintenance timing, allowing the system to essentially monitor and communicate its own needs for replacement.
2Reliability
If accumulators are replaced early to ensure continuous grease supply, then reliability is improved, but loss of time and operational efficiency deteriorate
Solution Approach 1:
The level indicator provides continuous visual feedback on grease levels, enabling operators to schedule replacements precisely when needed. This eliminates both early replacement (wasting time) and late replacement (compromising reliability), as the indicator shows the exact status of grease accumulation in real-time.
3Productivity
If accumulators are replaced after complete emptying, then productivity is improved, but reliability and equipment safety deteriorate
Solution Approach 1:
The level indicator serves as an early warning system that alerts operators before the accumulator is completely empty. This feedback mechanism allows for proactive replacement scheduling that maintains continuous grease supply to prevent equipment damage from grease starvation, while avoiding unnecessary early replacements that would reduce productivity.
4Device complexity
If manual inspection of grease levels is performed, then device complexity is reduced, but measurement precision and detection difficulty increase
Solution Approach 1:
The patent replaces manual visual inspection with an automated level indicator mechanism that provides precise measurement of grease levels. This mechanical indicator system automatically translates internal grease level into visible external indication, eliminating the imprecision of manual estimation while adding minimal complexity to the overall system.
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
Provides a visual indication of low grease levels, allowing timely replacement and maintaining continuous grease supply to subsea equipment, preventing equipment failure and pressure issues during bottle changes.
Implementation Method 1
The internal chamber of the bottle has a hydraulic fluid on one side of the plunger and a grease on an opposite side of the plunger. A source of hydraulic fluid is connected to the bottle and is in communication with hydraulic fluid on the one side of the plunger.
Implementation Method 2
The end cap assembly has an indicator member slidably connected thereto. The indicator member is cooperative with the plunger such that an end of the indicator member moves outwardly of the end cap assembly as the plunger moves in the bottle toward the end cap assembly.
Data Source
AI summary
A grease accumulator apparatus for use in subsea applications has a bottle with an internal chamber, a plunger positioned within the internal chamber and slidable therealong, and an end cap assembly affixed to one end of the bottle. The end cap assembly has an indicator member slidably connected thereto. The indicator member is cooperative with the plunger such that an end of the indicator member moves outwardly of the end cap assembly as the plunger moves in the bottle toward the end cap assembly. The end cap assembly has a body with a housing affixed to one end thereof. The housing has a hydraulic fluid inlet and a hydraulic fluid outlet. The indicator member is movable between a position in which the inlet and outlet are fluidically connected in a second position in which fluid flow is blocked between the inlet and the outlet.