Top Drive Interlock for Casing Retention Safety
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Solution Overview
Problem
Existing top drive systems face challenges in safe operation during drilling with casing operations, particularly due to the risk of inadvertent breakout of threaded connections, which can lead to hazardous situations and increased downtime.
Innovation Solution
Implementing a method that monitors the breakout of connections between the top drive's quill and tubulars, using a torque head or spear with a gripping mechanism and strain gages to detect unacceptable torque or bearing operation, and automatically stopping the top drive or alerting operators if a breakout is detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a threaded connection is used to connect the adapter to the quill, then the top drive can be adapted to retain casing, but the connection may inadvertently break out during operation creating hazardous situations
Solution Approach 1:
A torque head or spear acts as an intermediary component between the adapter and the quill, providing a more reliable connection interface that prevents inadvertent breakout while maintaining the ability to retain casing during drilling operations
Solution Approach 2:
The invention employs a bayonet-style quick connect interface with curved or spherical geometry that provides mechanical engagement through rotational insertion, creating a positive locking connection that resists inadvertent breakout forces better than threaded connections
2Adaptability or versatility
If a threaded connection is used to connect and disconnect casing, then the top drive can be adapted to retain casing, but the process is time consuming and increases the likelihood of thread damage
Solution Approach 1:
The bayonet-style quick connect interface is pre-configured with alignment features and engagement geometry that allows for rapid connection by simply rotating the coupling into place, eliminating the time-consuming threading process while maintaining secure casing retention
Solution Approach 2:
Instead of using threaded connections that require rotational screwing motion, the invention inverts the connection mechanism to use a bayonet-style quick connect interface that engages through a single rotational insertion motion, dramatically reducing connection and disconnection time
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Ensures safe operation by preventing unintended disconnections and reducing the risk of damage, thereby minimizing downtime and enhancing operational safety.
Implementation Method 1
a strain gage disposed on the housing and operable to indicate torque exerted on the housing by the bearing
Data Source
AI summary
The present invention generally relates to methods and apparatus for improving top drive operations. A method of ensuring safe operation of a top drive includes operating a top drive, thereby exerting torque on a first tubular to makeup or breakout a first threaded connection between the first tubular and a second tubular. The method further includes monitoring for break-out of a second connection between a quill of the top drive and the first tubular; and stopping operation of the top drive and/or notifying an operator of the top drive if break-out of the second connection is detected.