Wired Drill Pipe Repeater Stress Coupling for Axial Load Transfer
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Solution Overview
Problem
Current repeaters for wired drill pipe systems face challenges in reliability, serviceability, and ease of handling due to limitations in transferring axial and torque loading, and maintaining signal amplitude during drilling operations, especially with double shoulder threaded connections.
Innovation Solution
A wired drill pipe electronic device with a housing featuring a stress coupling mechanism that transmits axial and torque loading from both inner and outer shoulders of adjacent segments, incorporating a sealed atmospheric chamber and communication couplings to enhance signal transmission and handling capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional repeaters are used in wired drill pipe systems, then basic signal transmission is achieved, but reliability and serviceability deteriorate due to inadequate loading transfer capabilities
Solution Approach 1:
The repeater housing is divided into multiple functional segments including a stress coupling section with inner and outer shoulders, a central body housing, and threaded connection sections. This segmentation allows each part to specialize in specific functions (loading transfer, signal transmission, structural support) thereby improving reliability without proportionally increasing overall complexity
Solution Approach 2:
The stress coupling mechanism is nested within the housing structure, with the inner shoulder containing communication couplings that interface with the wired drill pipe. This nested arrangement allows multiple functions (stress transfer, signal coupling) to be integrated within a compact form factor, improving reliability while controlling complexity
2Ease of manufacture
If simple housing structures are used, then manufacturing is easier, but loading transfer from inner and outer shoulders deteriorates
Solution Approach 1:
The housing structure incorporates localized stress coupling features (inner and outer shoulders) with specific geometric properties optimized for load transfer, while other portions of the housing maintain simpler structures. This localized complexity approach ensures adequate loading transfer capability without unnecessarily complicating the entire manufacturing process
Solution Approach 2:
The stress coupling shoulders are integrated directly into the housing structure rather than being separate components, merging the structural support and loading transfer functions into a single manufactured part. This integration improves loading transfer capability while avoiding the complexity of additional assembly steps
3Reliability
If adequate loading transfer is implemented, then reliability improves, but handling and operational transparency deteriorate
Solution Approach 1:
The housing structure with its stress coupling shoulders is designed to be compatible with standard wired drill pipe connections while providing enhanced loading transfer. This multi-functional design allows the repeater to interface with existing drill pipe systems without requiring special handling procedures, maintaining operational transparency while improving reliability
4Loss of information
If communication couplings are added to transfer signals, then signal amplitude is maintained, but device complexity increases
Solution Approach 1:
The communication couplings are integrated into the inner shoulder structure of the housing, merging the signal transmission function with the existing mechanical structure. This integration allows signal amplitude maintenance without adding separate dedicated signal transmission components, thereby controlling the increase in device complexity
Data Source
AI summary
A wired drill pipe electronic device includes a housing having a threaded connection at each end configured to couple to a wired drill pipe having double shoulder threaded connections. A chassis is disposed inside the housing and is configured to define at least one sealed atmospheric chamber between the chassis and the housing. The chassis defines an internal passage therethrough. The device includes a stress coupling to enable transmission of at least one of axial and torque loading from both the inner and outer shoulder of adjacent wired drill pipe segments through the housing.