Downhole Sleeve Hydraulic Sequencing for Horizon Selection
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Solution Overview
Problem
Current hydraulic systems for downhole sleeve horizon selection and opening control in oil and gas production are complex and costly, particularly under high temperature and pressure conditions, making it difficult to manage oil and gas layers efficiently.
Innovation Solution
A hydraulic system comprising a horizon selection short section and a high and low pressure selection short section, utilizing a combination of hydraulic control valves and telescopic cylinders to control the opening and closing of sleeves through pressurization sequences and pressure combinations, allowing for simple and effective control of downhole flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If electric control is used to determine the downhole horizon, then the control operation is simple, but the life of electronic components is greatly shortened under high temperature and high pressure conditions
Solution Approach 1:
The patent replaces the electronic control system with a purely mechanical hydraulic control system. The horizon selection and sleeve opening control are achieved through hydraulic pressure transmission and mechanical valve actuation, eliminating electronic components that would fail under high temperature and pressure conditions while maintaining operational simplicity through the hydraulic control mechanism.
Solution Approach 2:
The patent employs hydraulic pressure as the control medium to actuate the flow control valves. By using hydraulic actuators connected to the valves, the system achieves reliable control of horizon selection and sleeve opening/closing operations without requiring electronic components, thus solving the reliability issue while maintaining ease of operation through centralized hydraulic control.
2Reliability
If hydraulic control methods are used for horizon selection and opening control, then the reliability under high temperature and high pressure is improved, but the system complexity and cost increase
Solution Approach 1:
The patent combines the horizon selection function and the sleeve opening control function into a single integrated hydraulic control system. The same hydraulic pressure transmission lines and actuators are used for both selecting the target horizon and controlling the opening/closing of sleeves, thereby reducing system complexity and cost while maintaining reliability under high temperature and pressure conditions.
Solution Approach 2:
The hydraulic control system is designed to perform multiple functions using the same components. The hydraulic actuators can selectively control different flow control valves corresponding to different horizons, and the same system handles both horizon selection and flow rate control, reducing the need for separate dedicated components for each function.
3Adaptability or versatility
If multiple flow control valves are installed for each production layer, then the separate control of each layer is achieved, but the device complexity and cost increase
Solution Approach 1:
The patent uses a centralized hydraulic control system with pressure transmission lines extending to each production layer. By controlling the hydraulic pressure at different zones, the system can selectively actuate flow control valves for specific horizons, achieving separate control of each production layer while avoiding the need for independent control systems at each layer, thus reducing overall device complexity.
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 enables efficient and cost-effective control of oil and gas layer production by using a simple one-way valve combination and pressurization sequences, reducing the complexity and cost associated with existing systems while maintaining operational reliability.
Implementation Method 1
configured to control the opening and closing of the group of hydraulic output ports through the group of hydraulic control valves
Implementation Method 2
control the opening and closing of the group of high and low pressure output ports and the oil return port through the input mode and pressurization adjustment of the second group of hydraulic control valves
Implementation Method 3
The downhole flow control valve comprises a decoder and a group of sleeves... the group of hydraulic output ports are respectively connected to drive a telescopic cylinder or a piston in the sleeve in a one-to-one correspondence
Data Source
AI summary
A hydraulic system includes a horizon selection short section comprising a group of hydraulic input ports, a group of hydraulic output ports, and a first group of hydraulic control valves connected therebetween, configured to control the opening and closing of the group of hydraulic output ports through the group of hydraulic control valves; a high and low pressure selection short section including a group of hydraulic connectors, a group of high and low pressure output ports and an oil return ports, and a second group of hydraulic control valves connected therebetween. The group of hydraulic connectors are connected to the group of hydraulic output ports, and are configured to control the opening and closing of the group of high and low pressure output ports and the oil return port through the input mode and pressurization adjustment of the second group of hydraulic control valves and the horizon selection short section.