High-Side Scribe Tool for Accurate Downhole Motor Alignment
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Solution Overview
Problem
Conventional methods for aligning the mechanical high side of a downhole motor with the electronic Toolface reference of a MWD tool in directional drilling are time-consuming, prone to human error, and result in steering errors and inefficient wellbore trajectory control.
Innovation Solution
A Directional Drilling High Side Scribe Tool (DDHST) that temporarily attaches to a downhole motor or drill collar, featuring an orientation rod for precise alignment and verification of the high-side orientation, ensuring accurate transfer to the MWD tool.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional manual scribing methods are used to align the downhole motor high side with the MWD tool Toolface reference, then the alignment can be established, but the process is time-consuming and prone to human error
Solution Approach 1:
The patent introduces a scribe tool as an intermediary device that physically connects the downhole motor and MWD tool during alignment. The tool includes a scribe point that contacts both components simultaneously, providing a mechanical reference that eliminates the need for multiple manual verification steps and reduces setup time while maintaining alignment accuracy.
Solution Approach 2:
The patent replaces manual visual judgment and multiple verification steps with a single mechanical scribing action. The scribe tool creates a physical mark that directly transfers the alignment reference from the motor to the MWD tool, substituting complex manual procedures with a simple mechanical operation that is both faster and more accurate.
2Reliability
If manual scribing and verification procedures are used, then the high-side orientation can be transferred, but the process is prone to human error and may lead to misalignment
Solution Approach 1:
The scribe tool serves as a reliable intermediary that mechanically ensures accurate transfer of the high-side orientation reference. By physically contacting both the downhole motor and MWD tool simultaneously, it provides a dependable reference that eliminates human judgment errors and reduces procedural complexity to a single reliable action.
3Productivity
If conventional alignment methods are used, then the motor and MWD tool can be correlated, but additional rig-floor time and manual handling are required
Solution Approach 1:
The patent replaces multiple manual operations with a single mechanical scribing action. The scribe tool is attached to the downhole motor and used to directly mark the MWD tool, eliminating the need for multiple verification steps and manual handling operations, thereby improving productivity while maintaining operational simplicity.
Data Source
AI summary
A directional drilling tool for establishing and verifying the high-side orientation of downhole motors relative to measurement-while-drilling (MWD) systems. The tool comprises a fluorescent, lightweight, drillable plastic bracket with an arcuate body that snaps onto tubular components such as downhole motors and drill collars. A radially extending rod provides accurate visual alignment of the motor high side. The tool's flexible, non-hazardous material maintains attachment under rig-floor impacts while enhancing safety for personnel and downhole equipment. It is suitable for whipstock operations and other directional drilling procedures requiring reliable high-side reference.