Hydrostatic Pressure Intensifier for Deep Well Packer Setting
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Solution Overview
Problem
Deploying downhole apparatuses, such as packers, in deep wellbores is challenging due to the high cost and technical difficulties associated with running power lines and applying sufficient hydraulic pressure from the surface.
Innovation Solution
A hydrostatic pressure intensifier system with a housing containing two pistons of different cross-sectional areas, where a first piston with a larger cross-sectional area is actuated by fluid pressure, transferring force to a second piston with a smaller cross-sectional area, amplifying pressure to effectively set downhole elements like packers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power lines are run downhole to provide power to activation tools, then downhole apparatuses can be activated, but cost and technical difficulties increase significantly with depth
Solution Approach 1:
The patent replaces the electrical power line system with a hydraulic fluid pressure system. Instead of running electrical conductors down the wellbore, hydraulic fluid is pumped through the annulus to actuate pistons that activate downhole apparatuses. This substitution eliminates the complexity and cost of power line deployment while maintaining activation capability.
Solution Approach 2:
The invention uses hydraulic pressure transmitted through fluid in the annulus to actuate a piston mechanism. The hydraulic system converts pressure applied at the surface into mechanical force downhole, providing a reliable and cost-effective method for activating packers and other downhole elements without requiring electrical power lines.
2Reliability
If hydraulic pressure is applied from the surface to activate downhole apparatuses, then activation is possible, but sufficient pressure cannot be achieved at great depths
Solution Approach 1:
The hydraulic system serves multiple functions: it transmits activation force downhole and simultaneously provides the necessary pressure amplification through the piston mechanism. The same fluid pressure that overcomes friction and depth-related pressure losses also actsuates the piston to generate the high force needed to set the packer.
Solution Approach 2:
The system is designed so that the hydraulic fluid pressure is applied in advance to the larger piston area, which then mechanically amplifies the force before it reaches the downhole apparatus. This preliminary pressure application allows the system to overcome depth-related pressure losses and still deliver sufficient activation force.
3Force
If a single piston system is used to transmit hydraulic force, then the system is simple, but sufficient force amplification cannot be achieved to set downhole elements
Solution Approach 1:
The piston system is divided into two separate pistons with different cross-sectional areas. The first piston receives hydraulic pressure and the second piston delivers the amplified force to the downhole apparatus. This segmentation allows each piston to be optimized for its specific function while achieving overall force amplification.
Solution Approach 2:
The two pistons are designed with asymmetric cross-sectional areas, where the first piston has a larger area than the second piston. This asymmetry is intentional and creates the mechanical advantage needed for force amplification. The pressure applied to the larger area generates a force that, when transmitted to the smaller area, results in higher force output.
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 system efficiently sets downhole elements by applying greater pressure than required, overcoming the limitations of traditional power line deployment and hydraulic pressure application, thereby facilitating the deployment of downhole apparatuses in deep wellbores.
Implementation Method 1
a first amount of force is applied to the first piston to actuate the first piston
Implementation Method 2
The first piston and the second piston are mechanically linked to each other, where a force applied to the first piston is transferred via the mechanical link to the second piston
Implementation Method 3
the second cross-sectional area of the second piston is less than the first cross-sectional area; applying a force to the first piston... amplifying pressure to effectively set downhole elements
Data Source
AI summary
The embodiments include methods and tools to activate downhole apparatuses. In one embodiment, a hydrostatic pressure intensifier includes a housing having at least two different internal cross-sectional surface areas. The housing includes a device mounted on the housing and operable to actuate in response to being subject to a threshold amount of pressure. The housing also includes a first piston housed in a first chamber of the housing, where the first piston has a first cross-sectional area and a first stroke length, and a second piston housed in a second chamber of the housing, where the second piston has a second cross-sectional area and a second stroke length, and where the first cross-sectional area is greater than the second cross-sectional area. The hydrostatic pressure intensifier also includes a fluid flow restrictor that restricts fluid flow through the valve to control an amount of pressure applied by the first piston.