MWD Pressure Pulse Generator for Real-Time Drilling Feedback
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Solution Overview
Problem
Current measurement while drilling (MWD) technologies face limitations in providing real-time feedback on angle and azimuth during subterranean drilling operations due to the harsh drilling environment and high costs, making them inaccessible to the majority of the drilling market, especially for straight hole drilling.
Innovation Solution
A novel pressure pulse generator coupled with a sensor package and controller, integrated into a short section of drill pipe near the drilling bit, encodes data into pressure pulses for transmission to the surface, allowing for continuous measurement and feedback of drilling parameters like inclination and azimuth without the need for mechanical connections or wires.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If measurement while drilling technologies are implemented, then real-time feedback on angle and azimuth is provided, but the cost becomes prohibitively high for the majority of the drilling market
Solution Approach 1:
The patent replaces complex mechanical measurement systems with a simplified approach using a pressure sensor and pulse generation mechanism. Instead of expensive mechanical gyroscopes and inclinometers, the system uses drilling fluid pressure pulses to encode and transmit measurement data, significantly reducing cost while maintaining measurement capability
Solution Approach 2:
The invention utilizes the drilling fluid (mud) circulation system as a communication medium. Pressure pulses are generated in the drilling fluid to encode measurement data, transforming the hydraulic system into both a measurement and communication platform, eliminating the need for separate expensive measurement equipment
2Measurement precision
If traditional MWD tools are used, then measurements can be taken, but frequent tool removal and maintenance are required due to erosion and wear from drilling fluid
Solution Approach 1:
The measurement system is integrated directly into the drill string, allowing it to service itself through the normal drilling operations. The drill string rotation and drilling fluid circulation automatically power and cool the sensors, eliminating the need for separate power and cooling systems that would require maintenance
Solution Approach 2:
The system performs multiple functions using a single integrated tool: measurement, communication, and power generation. The drill string serves as both the drilling tool and the measurement platform, while the drilling fluid serves as both the cooling medium and the communication channel, reducing the number of components that require maintenance
3Productivity
If continuous measurement feedback is implemented, then drilling efficiency improves, but the complexity of the device increases
Solution Approach 1:
The patent combines measurement, communication, and power functions into a single integrated system. The pressure sensor, pulse generator, and power source are all housed within the drill string, eliminating the need for separate systems and reducing overall complexity despite the advanced functionality
Solution Approach 2:
The drill string is transformed into a multi-functional platform that simultaneously performs drilling, measurement, and communication. The drilling fluid circulation system serves dual purposes as both the cooling medium and the data transmission channel, reducing the number of separate systems needed
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
This solution provides an affordable, reliable, and efficient means of transmitting drilling feedback in real-time, reducing the need for frequent tool removal and maintenance, and is suitable for various drilling applications, including straight hole operations, while minimizing erosion and wear from drilling fluid.
Implementation Method 1
transmission of information from the bottom of a bore hole to the surface by encoding information in pressure pulses in the drilling mud
Implementation Method 2
measuring the angle of the bore hole, the direction or azimuth of the bore hole
Data Source
AI summary
The present invention is a method and apparatus used to transmit information to the surface from a subsurface location during the process of drilling a bore hole comprising a pressure pulse generator or “pulser” coupled to a sensor package, a controller, an active electromagnetic system for subsurface collision avoidance, and a battery power source all of which reside inside a short section of drill pipe close to the bit at the bottom of the bore hole being drilled wherein the apparatus or “MWD Tool” can be commanded from the surface to make a measurement of desired parameters and transmit this information to the surface by encoding data in pressure pulses generated by a pulser valve that includes a stator and a rotor which may be open and closed to create pressure pulses.