Starting Mandrel Assembly With Universal Attachment Finger
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Solution Overview
Problem
Traditional mandrels require multiple versions to accommodate varying drill pipe thread standards, leading to complexity and inefficiency in drilling operations, as they need to be threaded and securely attached to different drill pipe configurations.
Innovation Solution
A mandrel assembly with an attachment finger that secures the drill pipe without threads, using a splined attachment body to reduce friction and facilitate easy removal, and provides removal apertures for efficient mandrel extraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional threaded mandrels are used to securely attach to drill pipes, then reliable connection is achieved, but multiple mandrel versions are required to accommodate varying thread standards
Solution Approach 1:
The mandrel is designed with a universal attachment finger system that can accommodate multiple drill pipe thread standards (API and proprietary) through a single mandrel design. The attachment finger with splined attachment body provides a standardized interface that works with various drill pipe configurations, eliminating the need for multiple specialized mandrels.
Solution Approach 2:
The invention extracts and eliminates the threaded connection requirement by introducing a non-threaded attachment finger mechanism. The attachment finger inserts directly into the drill pipe without requiring threads, thereby removing the complexity of accommodating different thread standards while maintaining secure attachment.
2Strength
If threaded connections are used to secure mandrels to drill pipes, then secure attachment is achieved, but the complexity of managing multiple mandrel types increases
Solution Approach 1:
A single mandrel design with a universal attachment finger system replaces multiple specialized threaded mandrels. The splined attachment body provides sufficient attachment strength while working with various drill pipe configurations, thereby reducing device complexity and mandrel variety.
Solution Approach 2:
The threaded connection element is extracted and replaced with a direct insertion attachment finger mechanism. This eliminates the need for multiple threaded mandrel variants while maintaining secure attachment through the splined interface between the attachment finger and drill pipe.
3Productivity
If traditional mandrels are used, then drill pipe insertion through RCD is achieved, but the process requires multiple mandrel changes based on drill pipe size and threads
Solution Approach 1:
The universal mandrel design with attachment finger system can handle multiple drill pipe sizes and thread standards with a single mandrel type. This eliminates the need for time-consuming mandrel changes during drilling operations, thereby improving productivity and reducing time loss.
Data Source
AI summary
A mandrel assembly secures to a mandrel and drill pipe to start the drill pipe through the RCD. The mandrel assembly attaches to different drill pipe configurations via an attachment finger. The attachment finger secures the mandrel to the drill pipe. The attachment finger inserts into the attachment aperture of the mandrel and the drill pipe to secure the mandrel with the drill pipe. Once attached, the user removes the mandrel by pulling the mandrel away from the drill pipe via removal apertures.