Dual Mud Gas Separator With Containment Chamber
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Solution Overview
Problem
Current Mud Gas Separator (MGS) designs are susceptible to gas blowing out the liquid seal, leading to risks of fire, explosion, and environmental spills, with inadequate isolation valves and pressure monitoring systems that fail to alert personnel in time to prevent liquid seal blowouts, especially when dealing with condensate influxes or entrained gas, posing risks to personnel and infrastructure.
Innovation Solution
A dual Mud Gas Separator design with a containment chamber and a control system that includes sensors and isolation valves to automatically shut down operations and prevent gas discharge into shaker and mud pit rooms, using a trip tank to manage hydrocarbon fluids and enhance pressure monitoring to prevent liquid seal blowouts and entrained gas issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a liquid seal is used in MGS to separate gas from liquid, then gas-liquid separation is achieved, but gas can blow out the liquid seal resulting in fire/explosion and environmental spill risks
Solution Approach 1:
A containment chamber is introduced as an intermediary component between the liquid seal and the external environment. When gas blows out the liquid seal, the containment chamber captures the discharged gas and directs it through a controlled path to the vent line, preventing direct discharge onto the main deck or into shaker/mud pit rooms. This mediator structure eliminates fire/explosion and environmental spill risks while maintaining the liquid seal's gas-liquid separation function.
Solution Approach 2:
The containment chamber acts as a pre-prepared safety buffer that is always in place before any liquid seal blowout event occurs. It provides a controlled containment pathway that prevents harmful discharge regardless of when or how the liquid seal fails, embodying the beforehand cushioning principle by preparing the protective structure in advance.
2Ease of operation
If isolation valves are added to MGS to enable liquid seal draining, then maintenance flexibility is improved, but gas venting risk during draining increases
Solution Approach 1:
The containment chamber serves as a mediator during liquid seal draining operations. When isolation valves are opened to drain the liquid seal, any gas that escapes is captured by the containment chamber and directed through the vent line to the drilling derrick, rather than being vented directly to the atmosphere or into enclosed spaces. This enables safe draining operations with isolation valves while eliminating gas venting risks.
3Reliability
If pressure monitoring system is enhanced to alert personnel earlier, then liquid seal blowout prevention is improved, but system complexity increases
Solution Approach 1:
Pressure transducers are installed to continuously monitor the pressure differential across the liquid seal and provide feedback to a control system. The control system compares the measured pressure against predetermined thresholds and automatically triggers an alarm or shutdown when the liquid seal is approaching blowout conditions. This feedback mechanism enables early prevention of liquid seal blowouts while maintaining manageable system complexity through automated control logic.
4Reliability
If automatic control system is implemented to isolate MGS system, then safety response time is improved, but device complexity increases
Solution Approach 1:
The control system continuously receives feedback from pressure transducers monitoring the liquid seal condition and gas detection sensors. When predetermined safety thresholds are exceeded or gas is detected in prohibited areas, the control system automatically activates isolation valves to close off the MGS system, stopping the flow of well fluid. This automated feedback-controlled isolation provides immediate safety response without requiring human intervention, preventing escalation of liquid seal blowout events while maintaining reasonable system complexity through standard control logic.
Solution Approach 2:
The control system performs self-service by automatically detecting unsafe conditions through sensors and executing the isolation sequence without human intervention. The system monitors its own operational parameters and takes corrective action when thresholds are exceeded, enabling rapid safety response while minimizing the need for complex human-operated control mechanisms.
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 dual MGS design effectively contains gas and fluid discharges, preventing fires, explosions, and environmental risks, ensuring safer operations by automatically isolating the system and managing hydrocarbon fluids, thus enhancing safety and preventing personnel suffocation and infrastructure damage.
Implementation Method 1
The inner pipe 5 (inlet side) and outer casing 6 (outlet side) form the Dip tube liquid seal
Implementation Method 2
Pressure transducer 12 measures the pressure at the bottom of the liquid seal and the pressure transducer 13 measures the operating pressure of the MGS vessel
Implementation Method 3
the HVAC system (negative pressure) in the shaker room, will suck the gas from the MGS chamber into the shaker room when the liquid seal is drained
Data Source
AI summary
This invention provides a Mud Gas Separator design (MGS) which prevents gas from being discharged into the shaker/mud pit rooms. It eliminates the risk of suffocation of the personnel working in these areas and the fire/explosion/environmental risks of the current MGS designs.The Mud Gas Separator design of two MGS/liquid seals (43/76&57/77) in series automatically prevents gas being discharged into shaker and mud pit rooms by allowing the DIP tube liquid seal (76) of the first MGS (43) to blow-out safely into a containment chamber (49) with the second liquid seal (77) remaining intact preventing any gas from being discharged into the shaker/mud pit rooms.A sensor system (55) at the top of the outer casing of the dip tube (52) will identify when there is a liquid seal blowout event and isolate the MGS to prevent further gas releases.