Adjustable High Pressure Intensifier for Downhole Valve Protection
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Solution Overview
Problem
Existing high pressure intensifiers produce a fixed output pressure, which is not adjustable and can cause damage to downhole safety valves due to pressure differences, leading to costly replacements as production flowline pressures change over time.
Innovation Solution
A high pressure intensifier system with a monitor and control unit that adjusts the input hydraulic fluid supply to maintain the output pressure at a predetermined value, allowing for dynamic adjustment of the pressure to match changing production flowline pressures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a fixed output pressure intensifier is used, then the umbilical can be made smaller and lighter, but the downhole safety valve may be damaged due to pressure differences
Solution Approach 1:
The patent applies dynamics by transitioning from a fixed pressure intensifier to a dynamically adjustable pressure intensifier. The control system continuously monitors production flowline pressure and adjusts the HPI output pressure accordingly, allowing the system to adapt to changing conditions and maintain optimal pressure differential, thereby preventing DHSV damage while preserving umbilical size benefits
Solution Approach 2:
The patent implements feedback control by monitoring production flowline pressure and using this information to adjust the HPI output pressure. The control system receives pressure feedback from the production flowline and automatically adjusts the intensifier output to maintain an acceptable pressure differential across the DHSV, resolving the contradiction between fixed pressure operation and variable pressure requirements
2Device complexity
If a fixed output pressure intensifier is used, then the system is simpler, but the downhole safety valve requires frequent replacements due to pressure changes
Solution Approach 1:
The patent applies dynamics by implementing an adjustable pressure intensifier system that can change its output pressure over time. This dynamic capability allows the system to adapt to production decline and maintain appropriate pressure differential across the DHSV throughout its service life, extending valve lifespan despite the added control system complexity
Solution Approach 2:
The patent applies parameter changes by varying the HPI output pressure parameter in response to changing production conditions. As production flowline pressure decreases over time, the control system adjusts the intensifier output pressure to maintain an optimal pressure differential, thereby extending DHSV service life through parameter adaptation
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 enables the pressure to be maintained within a predetermined range, optimizing the life of downhole safety valves by reducing pressure differential stress and allowing for cost-effective operation by reducing the need for frequent replacements.
Implementation Method 1
a high pressure intensifier configured to receive a hydraulic fluid from an input and provide the fluid to an output at a higher pressure than at the input
Data Source
AI summary
A high pressure intensifier system is disclosed. The system has a high pressure intensifier configured to receive hydraulic fluid from an input and provide the fluid to an output at a higher pressure than at the input, a monitor configured to monitor the pressure of hydraulic fluid provided at the output, and a control configured to control the supply of hydraulic fluid from the input, and configured to maintain the pressure of hydraulic fluid provided at the output at substantially a predetermined value.