Multifunction End Cap for Coiled Tubing Sensor Integration
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Solution Overview
Problem
Existing coiled tubing systems in the oil and gas industry face challenges in efficiently installing multiple fiber optic sensors simultaneously, as each sensor requires its own fiber in metal tubing (FIMT), making it cumbersome and time-consuming to deploy sensors like pressure and temperature sensors across long wellbores.
Innovation Solution
A multifunction end cap is introduced that integrates a weldable seal, a pressure inlet, an inbuilt turnaround for DTS fiber, and a test port, allowing for simultaneous installation of multiple sensors within coiled tubing, including fiber optic, vibrating wire, and conventional tubing encapsulated conductor lines, by providing a centralized solution for sensor deployment and communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple separate FIMT installations are used for each fiber optic sensor, then each sensor can be individually deployed, but the installation process becomes cumbersome and time-consuming
Solution Approach 1:
The patent combines multiple separate FIMT installation processes into a single integrated end cap assembly. The end cap incorporates multiple conduits that can simultaneously receive and secure multiple FIMTs, allowing operators to install several fiber optic sensors in one operation rather than performing separate installations for each sensor.
Solution Approach 2:
The end cap serves multiple functions: it provides structural closure for the coiled tubing, integrates multiple conduits for different FIMTs, incorporates a turnaround mechanism for fiber routing, and includes a test port for verification. This multi-functional design eliminates the need for separate components for each function, streamlining the installation process.
2Adaptability or versatility
If multiple separate components are used for sensor installation, then each component can perform its specific function, but the overall system complexity increases
Solution Approach 1:
The end cap is designed as a universal component that can accommodate multiple types of sensors through its integrated conduit system. Each conduit can receive different types of FIMTs (fiber optic, vibrating wire, or conventional tubing encapsulated conductor lines), allowing the same end cap structure to support various sensor technologies without requiring separate installation systems.
Solution Approach 2:
The patent merges multiple installation functions into a single end cap assembly, reducing the number of separate components needed. The consolidation of conduits, turnaround mechanisms, and test ports into one integrated unit simplifies the overall system while maintaining the ability to install multiple sensor types.
3Ease of operation
If traditional separate installation methods are used, then each sensor can be independently installed, but operational complexity increases
Solution Approach 1:
The patent combines multiple installation steps into a single operational sequence. Operators can feed multiple FIMTs through the end cap's conduits simultaneously, secure them in place, and perform testing through the integrated test port, reducing the number of separate operations required compared to traditional methods.
Solution Approach 2:
The end cap is pre-configured with multiple conduits and a turnaround mechanism before deployment. This preliminary preparation allows operators to simply feed the FIMTs into the pre-positioned conduits and secure them, eliminating the need for complex on-site assembly or configuration during installation.
Data Source
AI summary
A multifunctional end cap assembly for use in terminating the toe end of subsurface coiled tubing strings that include multiple sensors. The assembly includes provisions for turnarounds for DTS or DAS systems as well as provisions for connecting formation pressures with a pressure transducer within the coiled tubing string.