Multi-Point Chemical Injection System with Single Control Line
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Solution Overview
Problem
Current well treatment systems face challenges in delivering chemicals uniformly to multiple well zones from a single control line, as unequal fluid distribution occurs due to varying reservoir pressures, leading to inefficient chemical injection and potential depletion of one zone at the expense of others.
Innovation Solution
A multi-point chemical injection system with fluid metering valves and check valves, connected by a single control line, ensures uniform chemical distribution across multiple well zones by compensating for pressure differences and friction losses, allowing autonomous adjustment to reservoir properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single control line is used to deliver treatment chemical to multiple zones, then the system complexity is reduced, but the fluid distribution becomes unequal due to varying reservoir pressures
Solution Approach 1:
The single control line is segmented into multiple zones with individual injection points, allowing independent control of fluid delivery to each zone while maintaining a single continuous line from surface
Solution Approach 2:
Each injection zone is equipped with local flow control mechanisms (restrictors, valves, or pressure-regulating devices) that adjust fluid delivery based on local reservoir pressure conditions, ensuring uniform distribution despite pressure variations across zones
2Manufacturing precision
If multiple control lines are run to each injection location, then uniform fluid distribution can be achieved, but the device complexity and number of bypass ports required increases
Solution Approach 1:
Multiple control lines are merged into a single continuous control line that extends from surface through all zones, eliminating the need for separate control lines while maintaining individual zone control capabilities through local flow regulation devices
Solution Approach 2:
The single control line serves multiple functions by delivering treatment chemical to multiple zones simultaneously, replacing the need for multiple dedicated control lines and reducing the number of bypass ports required in the wellhead and production packer
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 uniform delivery of chemicals to multiple well zones, ensuring that each zone receives a desired volume of treatment fluid, regardless of reservoir pressure variations, thereby optimizing chemical injection and maintaining effective well production.
Implementation Method 1
a flow-through passage with a fluid metering valve
Implementation Method 2
One or more check valves may be positioned in the flow-through passage to enable passage of treatment chemical while preventing backflow of reservoir fluids into the single control line
Data Source
AI summary
A technique enables injection of treatment chemicals at a plurality of desired locations along a well. A multi-point chemical injection system is connected and deployed into a wellbore. The multi-point chemical injection system delivers one or more treatment chemicals along the wellbore to the desired locations at a plurality of injection zones. A single control line is run from a surface location down through the wellbore to the plurality of injection zones. The single control line is used to deliver the treatment chemical to each of the injection zones.