Downhole Injection Tool With Segmented Annulus Fluid Delivery
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Solution Overview
Problem
Existing downhole injection systems fail to ensure even distribution of sealing material around the circumference of the annular space, leading to leak paths or weak spots.
Innovation Solution
A downhole injection tool with at least two stings, each connected to a dedicated treatment fluid cannister, allowing for controlled and equal distribution of treatment fluid through multiple channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multiple stings share a common fluid passage, then the device complexity is reduced, but the fluid distribution homogeneity deteriorates
Solution Approach 1:
The patent divides the fluid delivery system into separate passages for each sting, with each passage connected to its own cannister. This segmentation ensures that treatment fluid is distributed independently through each sting, preventing preferential flow paths and achieving homogeneous distribution around the tubular, thereby resolving the contradiction between system simplicity and distribution uniformity.
2Device complexity
If a single fluid passage is used for all stings, then the device complexity is reduced, but the sealing reliability deteriorates
Solution Approach 1:
Each sting is equipped with its own dedicated fluid passage and cannister connection, allowing independent control and distribution of treatment fluid. This segmentation prevents the formation of leak paths caused by uneven distribution, thereby improving sealing reliability while maintaining reasonable device complexity.
3Manufacturing precision
If treatment fluid is injected through multiple stings via separate cannisters, then the fluid distribution homogeneity is improved, but the device complexity increases
Solution Approach 1:
The patent employs a modular design where each cannister can be independently connected to or disconnected from its corresponding sting, allowing the same basic unit to serve multiple stings. This universality enables homogeneous distribution through multiple stings while controlling device complexity through standardized, interchangeable components.
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
Ensures homogeneous distribution of treatment fluid around the downhole tubular, preventing leak paths and enhancing sealing effectiveness.
Implementation Method 1
Each sting comprises a fluid channel to establish fluid communication from within the tool housing to an exterior of the tool housing through the fluid channel
Implementation Method 2
The reservoir(s) each contain a piston, which can push the contents of the reservoir through the fluid passages into the annular space
Implementation Method 3
punches are forced outwardly, and radially against the casing, by a pressurized fluid. The application of pressure is continued until the punches are forced through the casing
Data Source
AI summary
A downhole injection tool for injecting a treatment fluid in a space surrounding a downhole tubular installed in a borehole in the Earth is based on an elongate tool housing extending around a central longitudinal tool axis. At least two stings are provided, each having a fluid channel. At least two treatment fluid cannisters are provided in the downhole injection tool, for holding the treatment fluid that is to be injected. A first cannister of the at least two treatment fluid cannisters is fluidly connected with the exterior of the tool housing via a first sting of the at least two stings, but not via a second sting of the at least two stings. A second cannister of the at least two treatment fluid cannisters is fluidly connected with the exterior of the tool housing via the second sting, but not via the first sting.