Rotating Sensor Mechanism for Seismic While Drilling
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Solution Overview
Problem
Existing downhole measurement technologies face challenges in accurately determining reservoir characteristics due to noise, interference, and directional issues, often requiring increased signal sensitivity and processing power at a high cost.
Innovation Solution
A system and method that utilize orthogonally positioned sensors in a tool capable of rotating in two or three dimensions to optimize signal reception through Hodogram analysis, improving the signal-to-noise ratio and compensating for failed sensors by repositioning them to maximize wave detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If increased signal sensitivity or processing power is used to overcome noise and interference, then measurement accuracy is improved, but cost and expense increase significantly
Solution Approach 1:
The sensor tool implements dynamic rotation capability, allowing sensors to change their orientation in two or three dimensions during drilling operations. This dynamic adjustment enables the sensors to optimally align with incoming seismic waves, maximizing signal reception without requiring increased signal sensitivity or processing power, thus improving measurement accuracy without significantly increasing device complexity or cost
Solution Approach 2:
The system changes the spatial orientation parameter of the sensors by rotating them to different angles and positions. By adjusting the angular parameters of sensor orientation, the system optimizes the signal-to-noise ratio for detecting seismic waves, achieving better measurement accuracy through geometric parameter optimization rather than through expensive high-sensitivity components
2Measurement precision
If multiple sensors are positioned orthogonally and rotated to optimize signal reception, then signal-to-noise ratio is improved, but device complexity increases
Solution Approach 1:
The sensor system is divided into multiple independent sensor elements positioned orthogonally to each other, with each sensor capable of independent rotation. This segmentation allows the system to process signals from different orientations separately and combine them optimally, improving the signal-to-noise ratio while keeping each individual sensor component relatively simple
Solution Approach 2:
The rotating sensor assembly serves multiple functions: it can detect seismic waves from any direction, optimize signal reception by aligning with wave propagation, and compensate for sensor failures through repositioning. This multi-functionality is achieved through a single rotational mechanism that provides directional adaptability without requiring multiple separate sensor systems
3Reliability
If sensors are rotated in response to wave direction, then measurement reliability is improved, but ease of operation decreases
Solution Approach 1:
The system implements a feedback mechanism where sensors continuously monitor the direction of incoming seismic waves, and this information is used to automatically adjust the sensor orientation. The rotation mechanism responds in real-time to wave direction changes, ensuring optimal signal reception and maintaining measurement reliability without requiring manual intervention, thus preserving ease of operation
Solution Approach 2:
The sensor system is self-adjusting, automatically orienting itself to optimal positions based on the detected wave directions. The system serves itself by using the measured wave information to control its own positioning, eliminating the need for external operators to manually adjust sensor orientations, thereby maintaining ease of operation while improving measurement reliability
Data Source
AI summary
A system, method, and sensor tool for enhancing sensor effectiveness. A wave is received utilizing multiple sensors in a downhole tool. Hodogram analysis of the wave is performed in response to measurements from the multiple sensors. A direction associated with the wave is determined. The multiple sensors are rotated to best sense the wave in response to the direction associated with the wave.