Rotating Control Device Latch Assembly Installation
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Solution Overview
Problem
Existing rotating control devices for subterranean wells face challenges in convenient and efficient installation and retrieval of components, such as bearings and seals, within the riser housing, which hampers maintenance and replacement processes.
Innovation Solution
A rotating control device with a latch assembly and running/retrieval tools that utilize a combination of pin and slot mechanisms, biasing devices, and an equalization valve to securely install and retrieve components, ensuring reliable sealing and fluid communication while preventing pressure fluctuations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional installation and retrieval methods are used for rotating control device components, then the structural simplicity is maintained, but the ease of operation and maintenance efficiency deteriorate
Solution Approach 1:
The rotating control device is divided into separable components including the bearing assembly, seal elements, and latch mechanism. This segmentation allows individual components to be independently installed and retrieved through the runout hole without requiring complete disassembly of the housing, significantly improving maintenance ease while maintaining reasonable structural complexity.
Solution Approach 2:
A retrieval tool acts as an intermediary device to facilitate the removal and installation of bearing assemblies and seal elements. The tool engages with features on the components and uses mechanical advantage to move them through the constrained runout hole, making the operation practical despite the tight spatial constraints.
2Ease of repair
If components are made removable for maintenance purposes, then the ease of repair is improved, but the reliability of sealing and pressure containment may worsen
Solution Approach 1:
Seal elements are pre-installed on the bearing assembly before it is inserted into the housing through the runout hole. The seals are positioned in advance to ensure proper alignment and seating when the assembly is installed, eliminating the need for complex sealing procedures during reassembly and maintaining reliability.
Solution Approach 2:
The latch mechanism automatically engages and secures the bearing assembly in its installed position without requiring additional fastening operations. This self-securing feature ensures consistent positioning and sealing contact every time the component is installed, improving reliability while maintaining ease of repair.
Data Source
AI summary
A rotating control device can include a latch assembly with a lock ring that permits displacement of an inner mandrel in one longitudinal direction, and prevents displacement of the inner mandrel in an opposite longitudinal direction. Another rotating control device can include a latch assembly and an equalization valve having an open configuration in which fluid communication is permitted between an exterior and an interior of the rotating control device through the equalization valve, the latch assembly changing from a latched to an unlatched configuration only when the equalization valve is in the open configuration. A method of installing a rotating control device can include releasing a running tool from the rotating control device by producing relative rotation between components of the running tool.