Hydrocyclone Piston Orifice Self-Cleaning Mechanism
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Solution Overview
Problem
Hydrocyclone separators in oil production and drilling operations face frequent blockages in the waste reject orifice due to particulates and debris, which reduces their effectiveness in separating oil and water phases.
Innovation Solution
A fluid separation apparatus with a piston mechanism that can be actuated to move between positions, allowing fluid flow to clear blockages in the orifice of the hydrocyclone by utilizing hydraulic pressure to displace a pin and forcibly remove debris, without relying on check valves or return springs that may become blocked.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a small orifice is used in the waste reject outlet to improve separation efficiency, then the separation efficiency is improved, but the orifice becomes susceptible to blockage by particulates and debris
Solution Approach 1:
The patent introduces a dynamic piston mechanism that can move between positions to clear blockages in the orifice. The piston is actuated by fluid pressure differentials, allowing it to dynamically clear debris from the orifice opening, transforming a static system into a dynamic one that can self-clean and maintain flow capacity.
Solution Approach 2:
The system uses the fluid flow itself to actuate the piston mechanism that clears blockages. The pressure differential created by the fluid stream automatically drives the piston to clear debris, making the system self-cleaning without requiring external intervention or additional power sources.
2Ease of operation
If check valves or return springs are used to clear blockages, then the orifice can be cleared of debris, but these mechanisms themselves become prone to blockage
Solution Approach 1:
The patent removes the traditional check valve and return spring mechanisms from the system. Instead, it uses a piston actuated by fluid pressure differentials to clear blockages, extracting the problematic mechanical components that were prone to clogging and replacing them with a simpler, more reliable fluid-driven mechanism.
Solution Approach 2:
The system uses hydraulic principles by employing fluid pressure differentials to actuate the piston that clears blockages in the orifice. The fluid flow creates pressure differentials that automatically drive the piston to clear debris, replacing mechanical spring-based systems with a hydraulic approach that is more reliable in dirty environments.
3Ease of operation
If the piston is actuated to move between positions to clear blockages, then debris can be forcibly removed from the orifice, but fluid communication must be restricted during the process
Solution Approach 1:
The patent employs annular seals that create flexible fluid communication barriers. These seals restrict fluid flow between the piston and housing when needed, allowing the piston to move freely to clear blockages, then restore fluid communication when the piston returns to its operating position, managing complexity through sealed flexible interfaces.
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
This solution effectively reduces blockages in hydrocyclone orifices, maintaining the separation efficiency of oil and water phases without the need for disassembly or additional mechanisms prone to clogging, ensuring continuous operation of the separation system.
Implementation Method 1
utilizing hydraulic pressure to displace a pin and forcibly remove debris
Implementation Method 2
converting pressure energy into velocity as a fluid mixture of water and oil enters the hydrocyclone through a tangential inlet. The tangential inlet flow causes the fluid inside the hydrocyclone to spin or rotate therein, creating a centrifugal force that multiplies the natural buoyancy of small oil droplets
Implementation Method 3
a first annular seal disposed between the housing and the piston and configured to restrict fluid communication between the housing and the piston
Data Source
AI summary
A fluid separation apparatus includes a hydrocyclone (100) having an orifice (134) therein, a housing (202) disposed in the hydrocyclone and having a bore (204), a piston (240) disposed in the bore (204) of the housing (202), and a first annular seal (248) disposed between the housing (202) and the piston (240) and configured to restrict fluid communication between the housing (202) and the piston (240), wherein the piston (240) includes a passage (242) extending through the piston (240) and having a pin (254) coupled to a first end (240a) of the piston, the piston (240) being actuatable to move between a first position (260) where the pin (254) is clear of the orifice (134) of the hydrocyclone, and a second position where the pin (254) is disposed in the orifice (134), wherein, the piston (240) is configured such that as the piston is actuated from the first position to the second position, fluid is permitted to flow into the passage (242) of the piston (240) from the bore (204) of the housing (202).