ESP Shaft Retaining Ring Sleeve to Stop Axial Migration
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Solution Overview
Problem
Conventional spiral rings in electric submersible pump (ESP) shafts tend to migrate out of their grooves due to poor installation practices or external forces, leading to axial displacement and potential system failure.
Innovation Solution
A retaining ring anti-migration system comprising a retaining ring seated in a shaft groove, a trap sleeve extending around the ESP shaft, and a jacket that traps the retaining ring, preventing axial migration by forming a shoulder against which the retaining ring wedges, thereby limiting shaft movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional spiral ring is used to prevent axial migration, then the shaft is protected from axial displacement, but the spiral ring migrates out of position due to poor installation or external forces
Solution Approach 1:
The retaining ring is nested within a trap sleeve that has a groove receiving the retaining ring. The trap sleeve is secured to the shaft, creating a nested structure where the retaining ring is trapped between the sleeve groove and shaft groove, preventing migration while maintaining axial position stability.
Solution Approach 2:
The trap sleeve acts as an intermediary component between the shaft and the retaining ring. It provides an additional grooved structure that works in conjunction with the shaft groove to trap and secure the retaining ring, preventing it from migrating out of position.
2Reliability
If the retaining ring is secured tightly to prevent migration, then axial displacement is prevented, but the installation becomes more complex
Solution Approach 1:
The retention system is segmented into distinct functional components: the shaft groove, the trap sleeve, the sleeve groove, and the retaining ring. This segmentation allows each component to be manufactured and installed independently, simplifying the overall installation process while ensuring reliable retention through the coordinated interaction of these segments.
Data Source
AI summary
A retaining ring anti-migration system and method. A retaining ring anti-migration system for a centrifugal pump shaft includes a pair of trap sleeves that enclose a pair of retaining rings, one retaining ring around each end of the shaft enclosed by one trap sleeve, the pair of retaining rings configured to bound axial migration of the shaft both upwards and downwards. A retaining ring anti-migration system includes a retaining ring seated in a shaft groove extending circumferentially around an electric submersible pump (ESP) shaft, a trap sleeve extending around the ESP shaft adjacent to the retaining ring, the trap sleeve including a sleeve body secured to the ESP shaft such that the trap sleeve rotates with the ESP shaft, and a jacket extending axially from the sleeve body over an outer diameter of the retaining ring with a clearance between the shaft and the jacket.