Adjustable Bail Extender for Single Joint Elevator Retrieval
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Solution Overview
Problem
Mechanical casing running tools (CRTs) without pipe-pickup mechanisms face challenges in retrieving single joints from the V-door, leading to increased rigging time, safety hazards, and high costs due to the need for multiple tools and heavy bail extensions.
Innovation Solution
The apparatus includes adjustable bail extenders attached to rig drilling bails, allowing for a non-pivoting connection to support a single joint elevator, enabling efficient retrieval of single joints without the need for extensive rigging or heavy extensions, by lengthening the bails to reach the V-door and providing a stable attachment point.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional bail extensions are pinned to rig bails to retrieve single joints, then single joint retrieval is enabled, but the extensions become heavy and expensive due to full string weight ratings
Solution Approach 1:
The bail extension is divided into multiple segments that can be adjusted in length, allowing the extension to reach the V-door without requiring full string weight capacity throughout the entire structure. This segmentation enables lighter overall weight while maintaining retrieval capability.
Solution Approach 2:
The bail extension incorporates adjustable length capability, transforming from a static heavy structure to a dynamic adaptable one. This allows the extension to be configured for specific operational needs rather than being over-engineered for maximum capacity, reducing unnecessary weight.
2Length of moving object
If adjustable-length single joint links are used to extend past CRT, then V-door reach is achieved, but rigging time increases due to replacing rig bails
Solution Approach 1:
The bail extension is designed to work with existing rig bails rather than replacing them, maintaining compatibility with standard rigging procedures. This multi-functional approach allows the extension to be used alongside conventional equipment without requiring complete rigging system changes, reducing setup time.
Solution Approach 2:
The bail extension is pre-configured with adjustable length mechanisms and attachment points that can be quickly set up before operation begins. This preliminary preparation eliminates time-consuming on-site adjustments and enables rapid deployment.
3Length of moving object
If CRT length is extended to reach V-door, then single joint pickup is possible, but interference occurs between CRT and SJE at lower eyes of rig bails
Solution Approach 1:
The bail extension acts as an intermediary component between the rig bails and the single joint elevator, providing a dedicated attachment point that eliminates interference with the CRT. This intermediate structure allows the SJE to be positioned without conflict with CRT components.
Solution Approach 2:
The bail extension utilizes the vertical dimension by extending downward from the rig bails, creating a new spatial arrangement that separates the SJE attachment point from the CRT horizontal workspace. This dimensional separation eliminates interference while maintaining reach to the V-door.
Data Source
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AI summary
An apparatus for assembling a tubular string includes a rig drilling bail, a joint bail extender, and a device. The joint bail extender is rigidly coupled to the rig drilling bail. The device is coupled to the first joint bail extender and configured to engage a tubular segment.