Downhole Actuation Tool Intermediate Pressure Chamber
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Solution Overview
Problem
High-pressure and high-temperature environments in deep wells pose challenges for well testing tools, leading to hydraulic failure due to excessive differential pressures and temperatures, resulting in increased costs and time delays from tool failure and the need for cumbersome power delivery.
Innovation Solution
A downhole tool with an intermediate volumetric mechanism that regulates fluid pressure between atmospheric and hydrostatic chambers, using a regulator and relief valve to maintain an intermediate pressure range of 10,000-25,000 PSI, reducing the differential pressure on weaker hydraulic components and enhancing tool durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the tool operates in high-pressure downhole environments with differential pressures exceeding 30,000 PSI, then the available power for actuation is sufficient, but the hydraulic components are susceptible to failure due to excessive differential pressure
Solution Approach 1:
The hydraulic system is segmented into distinct pressure zones: a high-pressure chamber exposed to downhole environment, an intermediate pressure chamber, and a low-pressure chamber. This segmentation isolates weaker hydraulic components from excessive differential pressure while maintaining sufficient power for actuation through the intermediate zone.
Solution Approach 2:
An intermediate pressure chamber acts as a mediator between the high-pressure downhole environment and the low-pressure atmospheric chamber. This intermediate zone buffers the extreme pressure differential, protecting hydraulic components from failure while enabling controlled power transmission for actuation.
2Weight of moving object
If the tool uses atmospheric pressure hydraulics in high-pressure environments, then the tool footprint and weight are minimized, but the thinner-walled regions are susceptible to failure under high differential pressure
Solution Approach 1:
Different regions of the tool are assigned different pressure ratings and structural qualities. The high-pressure chamber and its associated components are designed with thicker walls and higher strength materials to withstand downhole pressures, while the low-pressure chamber maintains thinner walls for weight reduction. This localized differentiation allows weight optimization without compromising overall structural integrity.
3Ease of operation
If the tool operates without heavy cabling for remote actuation, then the deployment is simplified, but the pressure pulse signaling in high-temperature environments increases the risk of hydraulic failure
Solution Approach 1:
The hydraulic system is pre-configured with pressure-regulated chambers and relief valves before deployment. The intermediate pressure chamber is pre-established to buffer differential pressures, and relief valves are pre-set to protect against overpressure conditions. This preliminary preparation ensures reliable actuation through pressure pulse signaling even in high-temperature environments without requiring heavy cabling.
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 significantly increases the tool's durability and reliability by reducing hydraulic failure rates, allowing it to operate effectively in high-pressure environments without the need for cumbersome power delivery, thus minimizing costs and delays associated with tool failure.
Implementation Method 1
fluid pressure into the mechanism from the one chamber may be governed by a regulator thereof
Implementation Method 2
fluid pressure release into the other chamber from the mechanism may be governed by a relief valve thereof
Implementation Method 3
configured to retain fluid pressure at a level that is between the different pressures of the chambers
Data Source
AI summary
A remote actuation tool equipped with an intermediate volumetric mechanism for enhanced tool durability in high pressure differential downhole environments. Valve segments of the tool are actuated by power available due to a pressure differential between atmospheric and hydrostatic chambers of the tool. Yet, the intermediate volumetric mechanism, whether in the form of a discrete chamber or a hydraulic line system, minimizes stresses of the differential pressure on tool hydraulics. Thus, failure rates are substantially reduced. So, for example, the tool may be reliably employed in downhole environments which present differential pressures in excess of about 30,000 PSI.