Threaded Packing Sleeve for Fast Pump Seal Replacement
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Solution Overview
Problem
Reciprocating pumps used in hydraulic fracturing systems face challenges due to erosion and corrosion from particulates and corrosive fluids, leading to frequent component replacement and downtime.
Innovation Solution
A sealing system featuring a sleeve with external threads for rapid installation and removal, using a tool to engage and disengage the sleeve within the pump bore, which includes a seal and packing components to block fluid flow and withstand harsh conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a seal and packing components are used to block fluid flow in harsh conditions, then sealing reliability is improved, but component erosion and corrosion occur leading to frequent replacement and downtime
Solution Approach 1:
The packing assembly is divided into separate replaceable components including a sleeve, seal, and packing components. The sleeve can be independently removed and replaced without replacing the entire packing assembly, allowing selective replacement of worn components while retaining functional parts.
Solution Approach 2:
The sleeve is designed as a sacrificial component that can be easily replaced. By making the sleeve a separate, replaceable part with coupling components for tool engagement, the system allows rapid replacement of this wear-prone component without replacing more expensive or durable parts like the seal or packing materials.
2Reliability
If sealing components are frequently replaced to maintain pump efficiency, then pump reliability is improved, but downtime increases
Solution Approach 1:
The sleeve incorporates coupling components (threaded coupling or bayonet coupling) that enable dynamic engagement and disengagement with installation tools. This allows the sleeve to be rapidly installed and removed without complex disassembly procedures, reducing maintenance downtime while maintaining sealing reliability.
Solution Approach 2:
Coupling components act as intermediaries between the sleeve and installation tools. These coupling mechanisms (threaded or bayonet) provide a standardized interface that enables rapid tool engagement and disengagement, facilitating quick sleeve replacement without requiring complex tooling or procedures.
3Ease of repair
If a sleeve with coupling components is used for rapid installation and removal, then ease of repair is improved, but device complexity increases
Solution Approach 1:
The coupling components on the sleeve provide multiple functions: they enable tool engagement for installation, provide alignment during installation, and facilitate rapid removal. This multi-functionality reduces the need for separate alignment features or complex installation procedures, offsetting the added complexity with functional consolidation.
Data Source
AI summary
A packing assembly includes a packing sleeve having a first sleeve portion and a second sleeve portion, wherein a first sleeve portion outer diameter is larger than a second sleeve portion outer diameter and a first sleeve portion inner diameter is larger than a second sleeve portion inner diameter. The packing assembly also includes a groove formed in the second sleeve portion outer diameter. The packing assembly further includes a shoulder formed at a transition between the first sleeve portion and the second sleeve portion. The packing assembly includes a shelf formed at the transition between the first sleeve portion and the second sleeve portion. The packing assembly also includes a plurality of packing components arranged within the first sleeve portion inner diameter, at least a portion of the plurality of packing components engaging the shelf. The packing assembly further includes a seal positioned within the groove.