Black-Powder-Resistant Through Conduit Valve Gate Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing through conduit valves in the oil and gas industry are prone to premature wear and damage due to black powder contamination, leading to flow restrictions and frequent servicing or shutdowns.
Innovation Solution
A valve design featuring an elongate gate with an orifice and solid portion, live-loaded seat assemblies with high sealing force, and a bonnet assembly system that allows for in-service maintenance and rebuild without removing the valve from the pipeline, utilizing materials like glass-filled nylon and polyurea surface treatments for enhanced durability and sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional through conduit valves are used in oil and gas pipelines, then the valve can control flow, but the valve is subject to premature wear and damage from black powder
Solution Approach 1:
The gate is segmented into distinct functional zones: a solid portion for sealing and a worn portion with an orifice for flow. This segmentation allows the valve to maintain sealing capability while accommodating wear in a non-critical area, thereby extending service life despite black powder exposure.
Solution Approach 2:
Different portions of the gate have different properties: the solid portion provides sealing surface integrity while the worn portion with orifice handles the abrasive flow. This local differentiation allows the valve to resist black powder wear in critical areas while allowing wear in non-critical areas.
2Ease of repair
If the valve is removed from the pipeline for servicing, then maintenance can be performed, but pipeline operation is disrupted
Solution Approach 1:
The valve is segmented into serviceable components (gate, bonnet assembly) that can be independently accessed and replaced. The bonnet assembly can be removed to access the gate for maintenance without removing the entire valve from the pipeline, enabling quick repairs and minimizing shutdown time.
Solution Approach 2:
The gate can be extracted from the valve body through the removable bonnet assembly for separate servicing. This allows the wear-prone gate component to be maintained independently while the valve remains installed in the pipeline, avoiding full valve removal and pipeline shutdown.
3Ease of manufacture
If the gate is designed with a simple solid structure, then manufacturing is easier, but the valve is more susceptible to black powder damage
Solution Approach 1:
The gate is manufactured as a single piece but designed with segmented functional zones (solid portion and worn portion with orifice). This maintains manufacturing simplicity while providing differential wear resistance across different functional areas, improving reliability without complicating fabrication.
Solution Approach 2:
The gate structure incorporates local quality variations: a solid sealed portion for sealing integrity and a worn portion with orifice for flow control. This allows the gate to be manufactured as a relatively simple single-component part while providing enhanced wear resistance in critical areas through strategic design.
Data Source
AI summary
A valve having improved resistance to black powder wear and damage includes a valve body defining a flow passage therethrough, an upper bonnet assembly defining a stem opening, and a stem passing through the stem opening. The valve also includes an elongate gate having a proximal end operatively attached to the stem, a distal end, an orifice sized and adapted to permit essentially unopposed passage of material through the gate when the orifice is aligned with the flow passage of the valve body, the orifice being located proximate the proximate end of the gate, and a solid portion sized and adapted to substantially completely block the flow of material through the gate when the solid portion is aligned with the flow passage of the valve body, the solid portion being located distally of the orifice such that the orifice is located between the proximal end and the solid portion.