Quick Bail Latch Mechanism for Faster Rig Bail Changeout
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Solution Overview
Problem
The existing bail systems for drilling rigs are cumbersome and time-consuming to change, requiring manual labor and increasing the risk of injury, especially when switching between drilling and casing operations, and existing solutions like link connectors and extensions are inefficient and pose safety hazards.
Innovation Solution
A quick bail system that adapts to existing rig bails, allowing for easy extension and connection without manual intervention, using a latch pin mechanism that automatically locks and unlocks to secure the bail in place, reducing the need for additional bails and minimizing risk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If manual bail changeout is performed to switch between drilling and casing operations, then the rig can adapt to different equipment types, but the process becomes time-consuming and increases the risk of injury
Solution Approach 1:
The bail system performs its own extension automatically through the self-extending mechanism. When the elevator encounters the transition piece in the borehole, the engagement automatically triggers the bail extension without requiring manual intervention at the surface, thus resolving the contradiction between adaptability and time loss.
Solution Approach 2:
The transition piece is pre-installed in the borehole at the casing depth position before drilling operations begin. This preliminary placement allows the bails to automatically extend when the elevator reaches it, eliminating the need for time-consuming manual bail changeouts and reducing injury risk while maintaining adaptability.
2Adaptability or versatility
If manual bail changeout is performed, then longer bails can be installed for casing operations, but manual labor is required which increases the risk of serious injury
Solution Approach 1:
The system eliminates manual intervention by making the bail extension self-activating. The mechanical engagement between the elevator and the pre-positioned transition piece automatically triggers the bail extension mechanism, removing workers from hazardous pinch-point areas and eliminating the risk of serious injury while still achieving the necessary bail length adjustment.
3Length of moving object
If link connectors are used to extend bails, then the overall length can be increased, but additional bails of various lengths must be stored at the rig which is inefficient and expensive
Solution Approach 1:
The transition piece serves multiple functions: it acts as a depth reference marker, a mechanical trigger for bail extension, and a connector between the drill string and casing. This multi-functionality eliminates the need to store multiple specialized components, reducing inventory requirements while still achieving the necessary bail length extension.
Solution Approach 2:
The bail system is segmented into standard-length bails that can be combined with the transition piece to create variable effective lengths. Instead of storing multiple full-length bails, the system uses standard modules that are reconfigured through the transition piece, reducing storage requirements while maintaining the ability to achieve different operational lengths.
Data Source
Figure 1a
Figure 1b
Figure 2a~2b
AI summary
Apparatus and methods for extending rig bails, of which the method includes bringing a rig bail towards a connector end of a quick bail system such that an eyelet of the rig bail makes contact with a latch pin of the quick bail system so that the latch pin is moved to an open position, moving the eyelet of the rig bail to enter the connector end of the quick bail system and aligning the rig bail with the quick bail system, lowering the rig bails until the eyelet of the rig bail is fully entered into the connector end of the quick bail system, and returning the latch pin to a closed position.