Self-Powered LWD Assembly with Integrated Sensors
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Solution Overview
Problem
Existing logging-while-drilling (LWD) tools require complex interfacing and are prone to failure, relying on external power and communication, which increases costs and requires highly trained engineers for assembly, programming, and data interpretation.
Innovation Solution
A self-powered, autonomous LWD assembly with a dedicated power source, memory, and sensors like resistivity micro-imagers and spectral gamma sensors, allowing for independent operation and data storage for later analysis, reducing dependence on external systems and enabling cost-effective well logging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If LWD tools use complex interfacing with external power and communication systems, then real-time data transmission capability is improved, but system reliability deteriorates due to more failure points and higher complexity
Solution Approach 1:
The LWD tool is equipped with its own power source (battery) and processing capabilities, making it self-sufficient and independent from external power and communication systems during operation. This self-service approach eliminates dependence on external systems, reducing failure points while maintaining full operational capability for data acquisition and processing.
Solution Approach 2:
The system is divided into independent functional modules (sensors, processing unit, memory, power source) that can operate autonomously. This segmentation allows the tool to function independently without requiring complex interfacing with external systems, thereby improving reliability while maintaining data acquisition capabilities.
2Adaptability or versatility
If LWD tools employ complex communication and power buses to control all tools in the BHA, then system control capability is improved, but ease of operation deteriorates requiring highly trained engineers
Solution Approach 1:
The tool includes integrated processing and control capabilities within the downhole assembly, eliminating the need for complex external communication and power buses. This self-contained design simplifies operation while maintaining full control capability, as the tool manages its own functions without requiring highly trained engineers to manage complex external interfaces.
3Duration of action of moving object
If LWD tools rely on external power sources, then operational duration can be extended, but device complexity increases due to interfacing requirements
Solution Approach 1:
The LWD tool incorporates its own power source (battery) within the downhole assembly, making it self-sufficient and eliminating the need for external power connections. This self-powered design reduces device complexity by removing complex power interfacing while providing sufficient operational duration for the logging operation.
4Measurement precision
If LWD tools use complex interfacing between different tools in the BHA, then measurement capability is improved, but ease of repair deteriorates and costs increase
Solution Approach 1:
The system uses independent, modular sensor packages with dedicated processing and memory that can function autonomously. This segmentation allows each measurement module to operate independently without complex interfacing, making the system easier to repair and maintain while preserving full measurement capability. Failed modules can be replaced individually without affecting other functions.
Data Source
AI summary
The present application pertains to a self-powered logging-while-drilling assembly. The assembly has a body comprising a releasable hatch and a battery within said body configured to power the assembly. A memory and/or processor may be employed with a resistivity micro-imager and/or a spectral gamma sensor.