Chemical Injection System for Wellbore Scale Prevention
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Solution Overview
Problem
In the resource exploration and recovery industry, completions without chemical injection systems face issues such as scale accumulation in downhole components, leading to production delays and increased costs due to the need for scale treatment using coiled tubing.
Innovation Solution
A chemical injection system is introduced, comprising a chemical injection tubing with a terminal end portion and a chemical injector assembly, including an anchor and valve, which is deployed into the wellbore to deliver treatment fluids and prevent scale formation, corrosion, and emulsions, thereby enhancing production without disrupting existing operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a chemical injection system is installed during completion, then scale formation and corrosion are prevented, but device complexity and installation cost increase
Solution Approach 1:
The chemical injection system is installed during the completion phase, performing preliminary action to prevent scale formation and corrosion before production begins. This proactive approach eliminates the need for future intervention and avoids production disruptions.
Solution Approach 2:
Chemicals are introduced as an intermediary substance to prevent direct harmful interactions between formation fluids and downhole components. The chemicals act as a mediator that protects metal surfaces from corrosion and prevents scale deposition.
2Productivity
If scale treatment is performed using coiled tubing, then production is restored, but production time is lost and costs increase
Solution Approach 1:
By installing the chemical injection system during completion, the patent performs preliminary protection against scale formation. This prevents the need for future scale treatment operations that would cause production delays and loss of time.
Solution Approach 2:
The patent converts the potential harm of scale accumulation into a benefit by using chemicals to prevent scale formation in the first place. Instead of dealing with the harmful effects of scale later, the system proactively prevents the problem from occurring.
3Adaptability or versatility
If chemical injection tubing is extended into the completion, then post-completion chemical treatment is enabled, but device complexity increases
Solution Approach 1:
The chemical injection tubing and assembly are designed to serve multiple functions: they can be installed during completion and used for both initial chemical treatment and future post-completion treatments. This multi-functionality provides adaptability without requiring separate systems for different treatment phases.
Solution Approach 2:
The chemical injection assembly is nested within the completion structure, with the injection tubing extending into the completion and the assembly positioned at the terminal end. This nested configuration integrates the injection system into the existing completion without requiring separate external infrastructure.
Data Source
AI summary
A resource exploration and recovery system including a first system, and a second system extending into a wellbore. The second system includes a completion having a casing defining a wellbore internal diameter. Chemical injection tubing extends from the first system into the completion. The chemical injection tubing includes a terminal end portion. A chemical introduction system is arranged at the first system and fluidically connected to the chemical injection tubing. The chemical introduction system is operable to deliver a chemical into the chemical injection tubing. A chemical injection assembly is mounted to the terminal end portion. The chemical injection system includes an anchor system operable to secure the chemical injection assembly to the casing.