Riser Coupling System Automation for Offshore Drilling Safety
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Solution Overview
Problem
The process of connecting riser sections in offshore well drilling or production is labor-intensive, risky for operators due to repetitive motion and heavy components, and prone to human error, necessitating an improvement in efficiency and safety.
Innovation Solution
A riser coupling system utilizing a spider assembly with RFID-based orientation and actuation tools, which automates the alignment and locking of riser sections, reducing operator involvement and enhancing precision through sensors and hydraulic actuators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual operator involvement is used for riser section connecting, then flexibility and adaptability are maintained, but operator safety deteriorates due to exposure to heavy components and repetitive motion injuries
Solution Approach 1:
The patent replaces manual mechanical operations with an automated robotic system that uses sensors, actuators, and control mechanisms to perform riser section connecting tasks. The robotic arm with gripper mechanism automates the handling, alignment, and locking of tubular members, eliminating direct operator exposure to heavy components and repetitive motion hazards while maintaining operational precision through electronic control systems.
Solution Approach 2:
The system enables self-alignment and self-locking capabilities through mechanical features such as tapered surfaces that guide automatic alignment, and locking mechanisms that engage automatically when the upper riser section is lowered onto the lower section. This reduces the need for continuous operator intervention while ensuring proper connection.
2Productivity
If manual operator involvement is used for riser section connecting, then complex alignment tasks can be performed with human judgment, but productivity deteriorates due to time-intensive manual processes
Solution Approach 1:
The automated robotic system performs alignment and connection operations much faster than manual processes. The robotic arm can rapidly position and lower the upper riser section onto the lower section, and the automated locking mechanism engages immediately upon contact, eliminating the time-consuming manual operations of aligning, lowering, and locking while ensuring consistent precision through mechanical guidance features.
Solution Approach 2:
The system incorporates preliminary alignment features such as tapered surfaces and guide mechanisms that automatically orient the tubular members correctly before the actual connection occurs. This preliminary positioning is built into the mechanical design, ensuring that alignment is achieved automatically as part of the connection process rather than requiring separate manual adjustment steps.
3Reliability
If manual operator involvement is used for riser section connecting, then complex alignment and locking tasks can be performed, but operator fatigue increases due to repetitive motion over time
Solution Approach 1:
The robotic system maintains precise alignment through mechanical guidance features such as tapered surfaces that passively guide the upper tubular member into correct orientation, and sensor systems that detect and verify alignment before and during the connection process. This eliminates the need for operators to perform repetitive manual alignment tasks that lead to fatigue, while maintaining consistent precision through engineered mechanical constraints and electronic verification.
Data Source
AI summary
Systems and methods for riser coupling are disclosed. A riser coupling system comprises a riser joint connector comprising a first tubular assembly coupled to a second tubular assembly. The riser coupling system further comprises a spider assembly which receives the riser joint connector and has a connector actuation tool. The connector actuation tool comprises a dog assembly, a clamping tool and a splined member. The dog assembly selectively extends a dog to engage the riser joint connector. The clamping tool couples the first tubular assembly and the second tubular assembly. Finally, the splined member actuates a locking member of the riser joint connector.


