Down-hole Gas Separator Baffle Assembly
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Solution Overview
Problem
Gas interference in petroleum wells reduces the volumetric efficiency of artificial lift mechanisms due to free gas entering the pump, which can be mitigated by separating gas from liquid in the production stream.
Innovation Solution
A gas separator with a central tube and baffle assembly is used to redirect the production stream, creating a flow rate of 0.4 to 1.2 feet/second, allowing gas to separate from liquid and be drawn into a suction tube for an artificial lift mechanism, while providing storage space for gas to rise and be collected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the pump intake velocity is increased to improve productivity, then the pump capacity increases, but gas bubbles cannot separate from the liquid effectively and enter the pump reducing volumetric efficiency
Solution Approach 1:
The gas separator divides the fluid flow path into distinct segments: a central tube for liquid flow and an annular space for gas separation. This segmentation allows liquid to be drawn through the central tube while gas bubbles rise and separate in the annular region, enabling the pump to operate at high velocities without ingesting free gas.
Solution Approach 2:
The invention extracts free gas from the production stream by providing a dedicated separation zone (annular space between central tube and well casing) where gas bubbles can detach from the liquid flow and rise to the surface, preventing gas from entering the pump and maintaining volumetric efficiency.
2Reliability
If a gas separator is added to separate gas from liquid, then volumetric efficiency improves, but device complexity increases
Solution Approach 1:
The gas separator assembly serves multiple functions within a single integrated structure: it separates gas from liquid, provides a flow straightening effect, and acts as a suction conduit for the pump. The central tube and annular space configuration accomplishes gas-liquid separation without requiring additional separate components, thereby improving volumetric efficiency while limiting increases in device complexity.
3Reliability
If the annular space volume is increased to provide gas storage, then gas separation improves, but the available space for liquid flow decreases
Solution Approach 1:
The invention utilizes the annular dimension between the central tube and well casing to provide gas separation volume. By arranging the flow path radially rather than axially, the system creates a three-dimensional separation zone that does not compromise the central liquid flow path, allowing adequate space for both gas accumulation and liquid throughput.
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 increases the volumetric efficiency of the pump by reducing free gas entering the pump, allowing for improved gas separation and increased pump capacity.
Implementation Method 1
the baffle assembly is operable to continually redirect the fluid and gas as it travels through the central tube
Implementation Method 2
A suction tube is located inside the central tube, the suction tube is operable to draw fluid from the space between the central tube and the well casing
Implementation Method 3
the well should provide enough storage space for the gas free liquid in the well case so that the well 'heads up' and produces extremely high percentages of gas intermittently
Data Source
AI summary
A gas separator for separating gas from a fluid in a production stream in a producing hydrocarbon well is described. The gas separator includes a central tube sized to fit into a well casing of the producing hydrocarbon well and having an input at its lower end for receiving the production stream and perforations at its upper end to allow the production stream to flow into the space between the central tube and the well casing. A suction tube is located inside the central tube, the suction tube is operable to draw fluid from the space between the central tube and the well casing and to deliver the fluid to an artificial lift mechanism. A baffle assembly in the gas separator is comprised of a series of baffles, each baffle extending between an inner wall of the central tube and an outer wall of the suction tube for a portion of the available space between the inner wall of the central tube and the outer wall of the suction tube, each baffle offset from the other baffles in the baffle assembly, wherein the baffle assembly is operable to continually redirect the fluid and gas as it travels through the central tube.