Tubular Running Tool Mandrel Assembly Rotation
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Solution Overview
Problem
Current wellbore operations face challenges in efficiently running and rotating tubular strings, particularly in making threaded connections, due to limitations in gripping and axial movement mechanisms.
Innovation Solution
A tubular running tool with a mandrel assembly comprising an upper, lower, and mid-mandrel that rotate in unison, featuring a tubular gripping portion, slip-joint, and actuator mechanism, which includes a compensation actuator and slip actuator to facilitate axial movement and gripping engagement, allowing for efficient connection and rotation of tubulars.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a tubular running tool uses a mandrel assembly with multiple mandrels that rotate in unison, then the ability to rotate tubular strings is improved, but the device complexity increases
Solution Approach 1:
The mandrel assembly is divided into multiple separate mandrels (upper mandrel, lower mandrel, mid-mandrel) that can rotate in unison. Each mandrel serves a specific function: the upper mandrel interfaces with the top drive, the lower mandrel has the tubular gripping portion, and the mid-mandrel connects them. This segmentation allows the system to achieve rotation capability while maintaining manageable complexity through functional specialization.
Solution Approach 2:
The mandrel assembly is designed to perform multiple functions: gripping tubulars, rotating tubular strings, and facilitating threaded connections. The same mandrel assembly structure enables both rotation of individual tubular joints for making up connections and rotation of entire tubular strings for drilling operations, making the device universally applicable to different wellbore operations.
2Ease of operation
If the tool includes actuator mechanisms for axial movement and gripping engagement, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The actuator mechanisms replace manual mechanical operations with automated actuation systems. The first actuator mechanism automatically controls axial movement of the lower mandrel relative to the upper mandrel, while the second actuator mechanism automatically controls gripping engagement of the slips with the tubular. This substitution of manual mechanical control with automated actuators improves ease of operation by reducing the skill and effort required to operate the tool.
3Productivity
If the tool enables efficient axial movement and gripping of tubulars, then the productivity is improved, but the device complexity increases
Solution Approach 1:
The actuator mechanisms are designed to perform preliminary actions that prepare the tubulars for efficient connection. The first actuator mechanism pre-positions the lower mandrel axially relative to the upper mandrel before the gripping action, and the second actuator mechanism pre-engages the slips with the tubular. These preliminary actions streamline the subsequent threaded connection process, improving productivity by reducing the time and effort required for making up connections.
Data Source
AI summary
A tubular running tool includes a mandrel assembly having an upper mandrel, a lower mandrel and a mid-mandrel, wherein the upper mandrel, the lower mandrel and the mid-mandrel rotate in unison; the lower mandrel having a tubular gripping portion; a slip disposed with the tubular gripping portion; the mid-mandrel forming a bore between a top end and a bottom end, the top end forming a slip-joint with the upper mandrel; and an actuator mechanism disposed with the mid-mandrel, the actuator mechanism comprising a compensation actuator and a slip actuator; wherein the compensation actuator functionally connects the upper mandrel and the lower mandrel to affect axial movement of the lower mandrel relative to the upper mandrel and the slip actuator moves the slip into gripping engagement with a tubular.