RCD Housing Other End Connection Assembly
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Solution Overview
Problem
The disassembly of rotating control devices (RCDs) in the oil and gas industry is complex and burdensome due to their functional requirements and harsh environments, making it difficult to replace sealing elements and perform maintenance.
Innovation Solution
The use of other end connections (OECs) that include an inner housing assembly with a coupling assembly featuring a threaded sleeve and a threaded split ring, allowing for quick assembly and disassembly of housing components without sacrificing pressure control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional standardized flanges and clamps are used to connect housing components, then pressure control is maintained, but assembly and disassembly become complex and time-consuming
Solution Approach 1:
The coupling assembly is divided into distinct modular components: a coupling body with internal threading, a separate coupling nut with external threading, and a seal element. These segmented components can be independently manufactured, assembled, and replaced, enabling quick connection and disconnection while maintaining pressure integrity through the seal element.
Solution Approach 2:
The coupling assembly acts as an intermediary component between the first housing component and the second housing component. It provides a standardized interface that simplifies connection while incorporating a seal element to maintain pressure control, thereby resolving the contradiction between ease of assembly and pressure integrity.
2Reliability
If RCDs are designed for functional requirements and harsh environments, then reliability is improved, but disassembly becomes burdensome for maintenance
Solution Approach 1:
The RCD housing is segmented into multiple components connected by coupling assemblies, allowing the seal elements and internal components to be accessed by simply unscrewing the coupling nut. This segmentation maintains the robustness needed for harsh environments while enabling easy maintenance without complete disassembly.
Solution Approach 2:
The coupling assembly is extracted as a separate, removable component from the housing structure. By taking out the coupling nut and seal element as independent components, the design allows maintenance personnel to quickly replace worn sealing elements without disassembling the entire RCD housing, thus improving ease of repair while maintaining reliability.
3Productivity
If quick assembly and disassembly mechanisms are implemented, then operational efficiency is improved, but pressure control may be compromised
Solution Approach 1:
The coupling assembly serves as an intermediary that reconciles the need for quick connection with pressure control requirements. The standardized threading enables rapid assembly, while the integrated seal element within the coupling body ensures pressure integrity is maintained despite the simplified connection mechanism.
Solution Approach 2:
The coupling assembly is designed to be self-sealing through the seal element that is automatically compressed when the coupling nut is threaded onto the coupling body. This self-service mechanism ensures pressure control is maintained without requiring additional complex locking or sealing mechanisms, thereby preserving both speed and reliability.
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
The OECs enable rapid and efficient assembly and disassembly of RCDs, simplifying maintenance and reducing operational complexity while maintaining pressure control, thus addressing the challenges of traditional standardized flanges and clamps.
Implementation Method 1
The coupling assembly includes a threaded sleeve positioned around the upper housing, the threaded sleeve having a first set of threads on a first axial end and a second set of threads on a second axial end. The coupling assembly also includes a threaded ring threaded to the threaded sleeve and positioned radially between the threaded sleeve and the upper housing.
Data Source
AI summary
An other end connection including an inner housing assembly, including an upper housing and a coupling assembly. The coupling assembly includes a threaded sleeve positioned around the upper housing. The threaded sleeve includes a first set of threads on a first axial end and a second set of threads on a second axial end. The coupling assembly also includes a threaded ring threaded to the threaded sleeve and positioned radially between the threaded sleeve and the upper housing.