Underwater Lifting Chambers With Incompressible Fluid Buoyancy Control
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Solution Overview
Problem
Current methods for lifting and moving objects underwater, such as in subsea construction and maintenance, face challenges including difficulty in maintaining constant height due to weather conditions, uncontrollable buoyant forces from air bags, and inefficacy at great depths, leading to high operational costs and safety risks.
Innovation Solution
An apparatus comprising two chambers with different fluids, where the first fluid is incompressible brine and the second fluid is an incompressible buoyant fluid, allowing for controlled and predictable buoyancy, enabling efficient lifting and movement of objects underwater by adjusting the volume of fluids between the chambers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If air bags are used for lifting underwater objects, then lifting capability is provided, but the buoyant force becomes uncontrollable due to gas compression at depth
Solution Approach 1:
The patent changes the physical state of the lifting fluid from compressible gas to incompressible liquid (brine). This parameter change eliminates the problem of gas compression at depth, ensuring that the buoyant force remains predictable and controllable regardless of operating depth. The incompressible nature of the liquid fluid maintains consistent density and buoyancy characteristics throughout the water column.
2Force
If vessels with cranes are used for underwater lifting, then lifting capability is provided, but expensive dynamic positioning technology is required to maintain constant height in rough seas
Solution Approach 1:
The lifting apparatus provides self-stability through its design, eliminating the need for expensive dynamic positioning systems. The incompressible fluid system naturally maintains consistent buoyant force without requiring active control systems to compensate for wave motion or maintain precise positioning. The apparatus serves its own positioning needs through the inherent stability of the liquid-filled chambers.
3Force
If air bags are used for deep sea lifting (exceeding 1000 metres), then lifting capability is reduced, but the apparatus becomes ineffective due to great gas pressures
Solution Approach 1:
The patent fundamentally changes the lifting medium from compressible gas to incompressible liquid, which maintains its density and buoyant properties even at extreme depths exceeding 1000 meters. The brine solution's incompressibility ensures that the apparatus remains effective and reliable in deep sea environments where gas-filled air bags would be completely ineffective due to crushing pressures.
4Force
If conventional cranes with wire suspension are used for deep sea lifting, then lifting capability is provided, but the wire weight becomes an appreciable component of total lift
Solution Approach 1:
The apparatus provides counterbalancing buoyant force through its liquid-filled chambers, which compensates for the weight of the lifting mechanism itself. This internal buoyancy system offsets the effective weight of the apparatus and any suspension elements, reducing the total lifting force required from surface vessels. The brine solution's density provides sufficient buoyant counterweight to balance the 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
The apparatus provides stable and safe load control, reduces operational time, and minimizes the need for expensive dynamic positioning systems, as the buoyant force is directly proportional to the volume of fluid pumped, allowing for precise control and efficient operation across varying depths.
Implementation Method 1
The apparatus provides for predictable and/or stable and/or safe load control and/or handling because the buoyancy of the second chamber is adequately controllable. The incompressibility of the first or second fluid, typically the first and second fluid, means that unlike an air bag, there is no change or little change in the buoyant force provided with changes in depth.
Implementation Method 2
The first fluid is typically an incompressible fluid. The incompressibility of the first or second fluid, typically the first and second fluid, means that unlike an air bag, there is no change or little change in the buoyant force provided with changes in depth.
Implementation Method 3
The density of the first fluid is typically from 1 to 2 kg/L, optionally from 1.6 to 1.3 kg/L, typically from 1.5 to 1.35 kg/L and preferably from 1.46 to 1.38 kg/L. The density of the second fluid may be from 0.25 to 1 kg/L, optionally from 0.4 to 0.7 kg/L, typically from 0.5 to 0.65 kg/L and preferably from 0.54 to 0.62 kg/L.
Data Source
AI summary
An apparatus (10) for lifting and moving an object that is underwater. The apparatus including a first (12) and a second (14) chamber, both chambers containing a first (16) and a second (18) fluid. There is a conduit (20, 21) in fluid communication with the first and second chambers, the first and second fluids moveable between the first and second chambers.