Push-the-bit Rotary Guiding Device with Real-time Well Wall Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional rotary guiding devices in petroleum drilling struggle to detect well sections with varying diameters in real-time, leading to deviations from the preset direction during drilling, as their guiding function relies on thrust force strength and direction, which changes with wellbore size variations.
Innovation Solution
A push-the-bit rotary guiding device equipped with ultrasonic sensors and a swing rib actuation mechanism that detects well wall distance in real-time, allowing the controller to determine if the actuation mechanism should swing the ribs to maintain directional guidance, preventing deviations from the preset direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the rotary guiding device operates in well sections with variable diameter, then drilling continues without interruption, but the guiding direction deviates from preset direction due to changed thrust force strength
Solution Approach 1:
The detectors are arranged to detect well wall position in advance before drilling proceeds, allowing the system to identify well section diameter changes beforehand. This enables proactive adjustment of swing rib actuation to maintain guiding accuracy, rather than reacting after deviation occurs.
Solution Approach 2:
The system uses detectors to continuously monitor well wall position and provides feedback to the control system. Based on this feedback about well section conditions (expanded or reduced diameter), the control system adjusts the actuation of swing ribs to maintain correct guiding direction, creating a closed-loop control system that adapts to changing wellbore conditions.
2Manufacturing precision
If real-time detection of well section diameter is implemented, then guiding direction accuracy is maintained, but device complexity increases due to additional detectors and control mechanisms
Solution Approach 1:
The swing ribs serve multiple functions: they provide the primary guiding function by contacting the well wall, and they also act as structural elements that can be actuated based on detection feedback. This multi-functionality reduces the need for separate adjustment mechanisms, thereby limiting the increase in device complexity while maintaining guiding accuracy.
Solution Approach 2:
The system uses the existing structural components (swing ribs and sleeve) to perform both guiding and adaptation functions. The swing ribs automatically adjust their position based on detector feedback, allowing the system to self-regulate without requiring complex external control mechanisms, thus minimizing the increase in overall device complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables real-time detection of expanded or reduced well sections, preventing guidance deviations and ensuring accurate well deviation and direction, while continuously measuring well diameter changes to simulate the oil well's spatial structure.
Implementation Method 1
a plurality of detectors, which are circumferentially arranged in the outer wall of the sleeve with an interval and able to detect a distance to a well wall in real-time; Preferably, the detectors are ultrasonic sensors
Data Source
AI summary
A push-the-bit rotary guiding device includes a mandrel having a central passage, a sleeve rotatably sleeved outside the mandrel, a plurality of swing ribs circumferentially arranged in an outer wall of the sleeve with an interval, an actuation mechanism for controlling each swing rib to swing respectively, a plurality of detectors for detecting a distance to a well wall in real-time, and a controller for determining whether the actuation mechanism is required to actuate the swing ribs to swing according to the detected distance. Through a real-time detection of the detectors of the push-the-bit rotary guiding device, a well section having an expanded or reduced diameter is detected in time and guiding of the rotary guiding device herein is avoided. The rotary guiding device has advantages of a simple and compact structure, convenient machining, easy assembling, and a safe and highly-efficient operation, and is easy to be popularized and applied.