Induction Liquid Solid Separator for Offshore Drilling Safety
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Solution Overview
Problem
Existing liquid-solid separation technologies in petroleum exploration face challenges such as high costs, inefficiency, and safety hazards due to exposed hot points that can ignite flammable gases during drilling operations, particularly in offshore environments where space is limited and environmental regulations are stringent.
Innovation Solution
A liquid-solid separator using an induction dryer with a conveyor made of electrically conductive material and a non-magnetic, non-conductive housing, operating under vacuum conditions to separate oil and water from petroleum well cuttings, minimizing exposure to flammable gases and reducing energy consumption by vaporizing contaminants at lower temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a rotary kiln with heating coil is used for liquid-solid separation, then separation efficiency is improved, but safety risk increases due to exposed hot portions that can ignite gas clouds
Solution Approach 1:
The harmful hot portions are extracted and enclosed within a sealed housing structure. The heating elements are contained inside the housing rather than being exposed to the atmosphere, removing the source of ignition hazard while preserving the heating function for effective separation.
Solution Approach 2:
The housing creates a sealed environment that isolates the heated portions from atmospheric oxygen and potential gas clouds. This enclosed space prevents the formation of ignitable mixtures and eliminates the fire hazard associated with exposed hot surfaces.
2Manufacturing precision
If cuttings are transported to a treatment facility for separation, then separation quality is improved, but transportation cost increases prohibitively
Solution Approach 1:
The system enables self-service treatment at the well site by providing complete separation functionality on-location. The separator unit processes cuttings immediately upon arrival, eliminating the need for external treatment facilities and expensive transportation while maintaining high separation quality through controlled heating and vacuum processes.
3Object-affected harmful factors
If a separator is placed at a distance from gas discharge locations to reduce fire risk, then safety is improved, but space utilization deteriorates in premium offshore locations
Solution Approach 1:
The fire hazard is extracted and isolated within the sealed housing, allowing the separator to be placed close to gas discharge locations without increasing fire risk. The enclosed heating elements prevent ignition of gas clouds, enabling safe proximity placement and optimal space utilization in constrained offshore environments.
4Productivity
If conventional heating methods are used for separation, then separation effectiveness is improved, but energy consumption increases
Solution Approach 1:
The system changes the operating parameters by applying vacuum conditions during the heating process. This reduces the boiling point of liquids, allowing separation to occur at lower temperatures and thereby reducing energy consumption while maintaining effective separation of oil and water from cuttings.
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 solution effectively separates contaminants from cuttings without exposing hot points to the atmosphere, reducing the risk of fires and explosions, while being energy-efficient and capable of recycling the separated liquids, thus addressing the safety and cost concerns of existing technologies.
Implementation Method 1
induction dryer with a conveyor made of electrically conductive material
Implementation Method 2
vaporizing contaminants at lower temperatures
Implementation Method 3
operating under vacuum conditions
Data Source
AI summary
A liquid solid separator utilizing inductive heating. An electrically conductive scroll conveyor is contained within a non-magnetic and non-conductive housing under vacuum. A moveable alternating electric coil is disposed around the housing. The scroll pulls the solids through the housing. Operation of the coil heats the scroll which heats the solids. The vacuum lowers the boiling point of the liquids, and they are vaporized at a relatively low temperature. The vapors are condensed and collected. Because of the low temperatures, the separated liquids are less likely to deteriorate during separation, facilitating recycling. Thermocouples and a computer track the internal temperature of the separator and coordinate the position of the coil to maintain the desired temperature. The housing is provided with a heat insulating outer layer and the interior of the scroll is pressurized with nitrogen. The separator surfaces exposed to the atmosphere are maintained at or below 150° F.