Wired Drill Pipe Segmentation for Downhole Communication
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Solution Overview
Problem
Current downhole drilling operations face limitations in measurement accuracy and communication between sensors deployed along the drill string and those in the bottom hole assembly (BHA), particularly in establishing effective communication channels for data transmission and tool actuation.
Innovation Solution
The implementation of a drilling system with a bottom hole assembly (BHA) coupled to a drill string, where the downhole portion is made of wired drill pipe and the uphole portion is made of non-wired drill pipe, enabling a high-bandwidth communication channel between sensors and a processor in the BHA, and using mud pulse telemetry or electromagnetic signals for data transmission to the surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wired drill pipe is used in the downhole portion, then communication reliability and measurement precision are improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The drill string is divided into two distinct segments: a downhole portion using wired drill pipe with embedded conductors for reliable communication, and an uphole portion using conventional non-wired drill pipe. This segmentation allows the system to achieve high communication reliability where needed while avoiding unnecessary complexity in other sections.
Solution Approach 2:
Wired drill pipe with embedded conductors is applied locally only to the downhole portion where sensors are deployed and communication reliability is critical. The uphole portion uses simpler conventional drill pipe, optimizing the overall system by applying complexity only where it provides value.
2Measurement precision
If wired drill pipe is used in the downhole portion, then measurement precision is improved, but manufacturing cost increases
Solution Approach 1:
The drill string is segmented such that only the downhole portion requires the more complex and expensive wired construction with embedded conductors. This allows high measurement precision to be achieved only where sensors are located, rather than unnecessarily increasing the cost of the entire drill string.
Solution Approach 2:
The wired drill pipe technology is applied locally to the downhole section where measurement precision is critical for sensor operations. The majority of the drill string uses conventional, easier-to-manufacture pipe, thereby reducing overall manufacturing costs while maintaining measurement precision where needed.
3Productivity
If a hybrid wired and non-wired drill pipe system is used, then communication efficiency is improved, but device complexity increases
Solution Approach 1:
The communication system is segmented into two modes: wired communication in the downhole portion for high-speed data transmission, and wireless/mud-pulse communication in the uphole portion. This segmentation enables the system to achieve high communication efficiency for sensor data while using simpler communication methods where high bandwidth is not required.
Solution Approach 2:
The drill string system is designed to support multiple communication functions through different methods in different sections. The wired portion handles high-bandwidth sensor data transmission, while the non-wired portion handles command transmission and less data-intensive communications, creating a universal system that adapts communication methods to specific needs.
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 system enhances measurement accuracy and communication efficiency by providing a reliable bi-directional communication link for sensor data processing and tool actuation, improving drilling operations by enabling real-time data transmission and command execution.
Implementation Method 1
The wired drill pipe provides an electronic communication link between the sensor and the processor in the bottom hole assembly
Implementation Method 2
transmitted to the surface using a non-wired drill pipe communication channel such as mud pulse telemetry
Implementation Method 3
using electromagnetic signals for data transmission to the surface
Data Source
AI summary
A system for drilling a subterranean wellbore includes a bottom hole assembly (BHA) coupled to a downhole end of a drill string. The BHA includes an electronic controller having a processor. The drill string includes downhole and uphole portions with the downhole portion made up of wired drill pipe and the uphole portion made up of non-wired drill pipe. The downhole portion further includes at least one downhole tool or sensor sub in communication with the BHA via the wired drill pipe communication link. Methods for making sensor measurements, downlinking data and/or commands to the BHA, and actuating a downhole tool make use of the system.