Fluted Drill Pipe Passageway for Downhole Data Cable Routing
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Solution Overview
Problem
Existing methods for transmitting data from downhole drilling tools to the surface are limited by slow data rates and the complexity of integrating transmission lines into downhole tools, which often results in unreliable and costly solutions, particularly due to the need to avoid weakening the tool walls by forming channels or passageways.
Innovation Solution
The development of a modified tubular system with annular tool joints and axial channels or passageways in the box end and pin end of downhole tools, featuring flutes to secure transmission lines and prevent kinking, along with methods like gun-drilling and milling to create these passageways at strategic angles, allowing for a smooth and reliable data transmission path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a channel or passageway is milled or formed in the wall of a downhole tool to accommodate a transmission line, then the transmission line can be integrated into the tool, but the wall strength is critically weakened
Solution Approach 1:
The patent applies local quality by concentrating the transmission line passage through the central bore rather than milling channels through the tool wall. The thicker wall sections at box ends and pin ends maintain their full thickness and strength, while the central bore serves as the dedicated passage route, preserving local wall integrity where it matters most for structural support.
Solution Approach 2:
The patent transitions from a two-dimensional approach (milling channels through the wall thickness) to a three-dimensional approach (routing through the central bore volume). This dimensional shift allows the transmission line to pass through the hollow central space of the tool rather than cutting through the load-bearing wall material, thereby maintaining wall strength.
2Strength
If the central bore is used as the only practical route for the transmission line, then wall strength is maintained, but the transmission line path is limited and requires routing through thicker wall sections at box ends and pin ends
Solution Approach 1:
The patent applies preliminary action by pre-forming the central bore with sufficient length and appropriate diameter before final tool assembly. This allows the transmission line to be easily routed through the central bore and connected to transmission elements at the box end and pin end, simplifying the installation process while maintaining wall strength throughout the tool body.
3Device complexity
If traditional data transmission methods like mud pulse telemetry are used, then no additional components are needed, but data rates are very slow and large quantities of data cannot be transmitted at high speeds
Solution Approach 1:
The patent replaces the mechanical mud pulse telemetry system with an electrical cable-based transmission system. The electrical cable integrated through the central bore provides high-speed data transmission capability, substituting the slow mechanical pressure-wave method with a faster electrical signal transmission method while maintaining compatibility with the existing tool structure.
Data Source
AI summary
A modified tubular system for use in connection with the recovery of subsurface minerals and fluids. The tubulars may include drill pipes, risers, production tubing, and tools integrated into such tubulars. Such tubulars may be interconnected using tool joints or threaded tubular sections. Some tool joints may comprise annular shoulders. The shoulders may comprise an annular groove for housing an inductive coupler that may include magnetically conductive electrically insulating (MCEI) trough and an electrically conductive coil laid within the trough. An axial passageway formed in the shoulder may open into the groove. The passageway may comprise flutes. The flutes maybe formed in the wall of the passageway or added to the passageway as an insert or as part of a passageway liner. A fluted transmission line may be disposed within the passageway. The transmission line and liner flutes may mate with the passageway flutes. The liner may be hardened.