Bi-directional Telemetry in Wellbore Cross-over Tools
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Solution Overview
Problem
Current wellbore operations lack real-time communication systems that can effectively transmit information from downhole devices and locations below the frac port to the surface, hindering the monitoring and control of treatment operations such as fracturing and gravel packing.
Innovation Solution
A two-way communication system is implemented using an inner string with a first tubular and a service tool featuring a cross-over tool that protects the communication link from direct fluid flow, allowing for real-time data transmission between the surface and downhole devices, including through the frac port.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a communication link is run from the surface to below the frac port through the cross-over tool, then real-time information transmission is enabled, but the communication link is exposed to direct fluid flow which can damage it
Solution Approach 1:
A protective conduit or housing is introduced as an intermediary structure that allows the communication link to pass through the cross-over tool while being shielded from direct exposure to high-pressure treatment fluid. This mediator structure enables information transmission without compromising the integrity of the communication link.
Solution Approach 2:
The communication link is nested within a protective conduit or channel that is itself nested within the cross-over tool structure. This nested arrangement allows the communication link to traverse the cross-over tool while being physically protected from the harsh fluid environment.
2Productivity
If treatment fluid flows directly through the cross-over tool to supply fracturing fluid to zones, then efficient fluid delivery is achieved, but the communication link cannot be protected from direct fluid exposure
Solution Approach 1:
The cross-over tool is segmented into separate functional zones: a fluid flow passage for treatment fluid and a protected conduit for the communication link. This segmentation allows independent optimization of fluid delivery efficiency while protecting the communication infrastructure from fluid exposure.
3Ease of manufacture
If commercially available inner strings with packer setting tools are used, then standard equipment is utilized, but real-time monitoring below the frac port is not available
Solution Approach 1:
The cross-over tool is designed with multi-functionality, serving both as a fluid delivery mechanism for fracturing operations and as a protective conduit for communication links. This universal structure enables real-time monitoring capabilities to be added to standard well completion equipment without requiring entirely new hardware systems.
Data Source
AI summary
An apparatus for use in a wellbore for performing a treatment operation is disclosed that in one non-limiting embodiment may include an inner string that further includes a first tubular having a first communication link, and a service tool including a cross-over tool having a fluid flow passage therein for supplying a treatment fluid under pressure from an inside of the service tool to an outside of the service tool, and wherein the service tool includes a second communication link operatively coupled to the first communication link and wherein the second communication link runs across or through the fluid flow passage in the cross-over tool that is protected from direct flow of the fluid under pressure from the inside of the service tool to the outside of the service tool.