Mud Pulse Turbine Rotor Timing for Self-Powered Two-Way Telemetry
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Solution Overview
Problem
Existing mud pulse generation systems for petroleum drilling face limitations in transmission rate and power consumption, particularly with conventional switching-valve pulsers requiring external power and high-speed rotation, which cannot meet the demands of real-time measurement of multiple downhole parameters.
Innovation Solution
A mud pulse generation system utilizing a turbine stator and rotor with specific blade configurations and a power generation module, capable of generating high-frequency pressure pulses with variable time intervals without external power, enabling two-way communication by controlling blade positions and load adjustments to encode and decode signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional switching-valve pulsers are used to generate mud pulse signals, then the system can transmit data, but the transmission rate is low and cannot meet the requirement for transmitting a large number of geologic parameters
Solution Approach 1:
The patent replaces the conventional mechanical switching-valve system with an electromagnetic valve system. The electromagnetic valve uses electromagnetic force to control the opening and closing of the valve, enabling faster response and higher transmission rates. This substitution allows the system to transmit a larger number of geologic parameters efficiently while maintaining the mud pulse signal generation capability.
2Productivity
If continuous-wave pulse transmission method is used to achieve high transmission rate, then the data transmission capability is improved, but the system requires large power consumption for high-speed rotor rotation
Solution Approach 1:
The patent implements a self-powered system where the mud pulse signal generator uses the kinetic energy of the drilling fluid flow to drive the rotor, which in turn generates electromagnetic power through the stator coils. This self-service mechanism eliminates the need for external power sources and reduces power consumption while maintaining high transmission rates. The system converts the energy already present in the drilling fluid into useful work for signal generation and transmission.
3Productivity
If high-speed rotor rotation is used to generate continuous-wave pulses, then the transmission rate is improved, but the system requires dedicated power supply equipment
Solution Approach 1:
The patent designs a multi-functional system where the rotor serves dual purposes: it acts as both the driving element for generating mud pulse signals and as the rotor of an electromagnetic generator. The stator coils serve as both the magnetic field generator for the electromagnetic valve and as the power generation component. This universal design eliminates the need for dedicated power supply equipment while maintaining high transmission rates.
4Device complexity
If switching-valve pulser is used to generate pulses, then the system can operate with simple structure, but it requires external power supply and cannot achieve high transmission rate
Solution Approach 1:
The patent merges the pulse generation function and the power generation function into a single integrated system. The electromagnetic valve, rotor, and stator coils work together as a unified mechanism that both generates mud pulse signals and produces electrical power from the drilling fluid flow. This merging maintains structural simplicity while achieving high transmission rates through the efficient electromagnetic control mechanism.
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
The system achieves high-frequency pulse transmission comparable to continuous-wave pulsers while eliminating the need for external power, supporting real-time data transmission and power supply to downhole systems.
Implementation Method 1
a turbine stator, comprising at least two stator openings each with a preset opening angle; a turbine rotor, having a sidewall provided with at least one wide blade and at least one narrow blade spaced from each other through several openings
Implementation Method 2
a power generation module, which is driven by rotation of the turbine rotor for supplying power
Data Source
AI summary
A mud pulse generation system based on two-way communication includes a turbine stator having at least two stator openings (35) each with a preset opening angle; a turbine rotor, having a sidewall provided with at least one wide blade and at least one narrow blade spaced from each other through several openings; a power generation module driven by rotation of the turbine rotor for supplying power; and a master device configured to control relative time when the wide blade or the narrow blade passes through the stator openings by controlling a controllable load of the power generation module based on uplink information, generate an uplink pulse signal with variable time intervals at the stator openings, and monitor and decode three-phase AC voltage signal output by the power generation module to obtain downlink information. This system is able to generate high-frequency pressure fluctuation pulse without requiring external power supply.