High-Pressure Three-Phase Separator With Automated Level Control
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Solution Overview
Problem
Existing sand separators and gas production units (GPUs) are inadequate for handling high-pressure fluid streams from natural gas wells, leading to inefficiencies, emissions, and safety hazards due to unpredictable sand production rates, liquid carryover, and the need for multiple separation vessels, which increase costs and operational risks.
Innovation Solution
A single, high-pressure capable separator with integrated electronically controlled valves and sensors for real-time liquid and oil level detection, allowing precise control of fluid and debris discharge, and automated drain mechanisms to ensure efficient separation and minimize emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional sand separators and GPUs are used to handle high-pressure fluid streams, then separation of gas from liquid and sand is achieved, but the system requires multiple vessels, increases operational complexity, and creates safety hazards due to unpredictable sand production rates and liquid carryover
Solution Approach 1:
The patent combines the functions of sand separation, liquid separation, and gas production into a single integrated separator vessel. This eliminates the need for separate sand separators and GPUs, reducing the number of vessels while maintaining reliable separation performance through integrated level sensors and automated valve control systems
Solution Approach 2:
The separator vessel is designed to perform multiple functions simultaneously: removing sand and debris, separating liquid from gas, and controlling fluid flow at high pressures. The single vessel handles all separation tasks that previously required multiple specialized devices, improving reliability while reducing complexity
2Productivity
If manual draining of sand separators is used, then sand and debris are removed from the system, but the unpredictable sand production rates make it impossible to establish optimized draining schedules, requiring frequent manual intervention
Solution Approach 1:
The patent incorporates level sensors that continuously monitor the amount of sand and liquid in the separator vessel. This feedback system automatically triggers draining operations when predetermined levels are reached, eliminating the need for manual intervention and optimizing draining schedules based on actual production rates
Solution Approach 2:
The separator system performs self-monitoring and self-draining through automated level sensors and electronically controlled valves. The system serves itself by automatically detecting when draining is needed and executing the draining operation without human intervention, improving productivity while reducing time loss
3Reliability
If high-pressure wellhead gas is heated to counteract the Joule-Thomson effect, then downstream problems such as ice formation and equipment embrittlement are prevented, but this generates undesirable emissions and consumes gas that would otherwise be sold
Solution Approach 1:
The patent extracts and removes liquid water from the gas stream at high pressure before the gas undergoes pressure reduction. By eliminating the liquid phase that would otherwise freeze during the Joule-Thomson effect, the system prevents ice formation and equipment embrittlement without requiring heated glycol baths, thereby eliminating emissions and preserving sellable gas
4Productivity
If throttling and repeated compression are used to maintain gas pressure through the pipeline, then gas is delivered to CNG facilities, but this process is highly inefficient due to multiple pressure cycles
Solution Approach 1:
The patent performs liquid removal and separation at the wellhead before gas enters the pipeline, maintaining high pressure throughout the process. By addressing the liquid content issue upfront, the system eliminates the need for subsequent throttling and repeated compression cycles, improving gas delivery efficiency while reducing energy loss
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 enables reliable, automated separation of liquids and solids at high pressures, reducing equipment wear, minimizing emissions, and optimizing wellsite operations by maintaining consistent separation performance during flowback and production.
Implementation Method 1
the separator includes a vessel defining an interior chamber... an inlet for delivering fluid being produced from a wellbore into the vessel... an outlet through which gas is directed out of the vessel
Implementation Method 2
At high wellhead pressures, the fluid production stream must be heated before or after the choke to counteract the Joule-Thomson (JT) effect
Data Source
AI summary
A separator fluidly connected to a wellbore includes: a vessel defining an interior chamber; an inlet for delivering fluid produced from a wellbore into the vessel at a first pressure; an outlet through which gas is directed out of the vessel at a pressure substantially equal to the first pressure; at least one liquid/oil level sensor capable of detecting the level of liquid within the interior chamber of the vessel and the level of oil within the interior chamber; two electronically controlled valves in fluid communication with the vessel; and a controller connected to the at least one liquid/oil level sensor and the electronically controlled valves and programmed to, in response to a level of the liquid and a level of oil in the interior chamber of the vessel: open, close, or modulate the electronically controlled valves to regulate the combined flow liquid and oil out of the vessel.