Gate Valve Insert Assembly With Pressurized Lubricant Barrier
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Solution Overview
Problem
Proppant in proppant-laden fluids can enter the interior volume and interfaces of gate valves during fracturing operations, causing wear and reducing the valve's useful life.
Innovation Solution
Incorporating a valve insert system with seat assemblies that retain a pressurized lubricant within the interior volume, using telescoping seat assemblies responsive to fluid pressure to reinforce sealing and prevent proppant entry, and employing a lubrication system to maintain and monitor lubricant pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If proppant-laden fluid flows through the gate valve, then the valve enables fluid transmission, but proppant enters the interior volume and interfaces causing wear and reducing valve life
Solution Approach 1:
The valve interior is divided into separate zones using valve inserts and seat assemblies. The sealing surfaces are segmented into distinct regions with different functions - some areas handle proppant-laden fluid while others maintain clean lubricant reservoirs. This segmentation prevents proppant from contaminating critical sealing interfaces, reducing wear and extending valve life while maintaining fluid transmission capability.
Solution Approach 2:
A lubricant system acts as an intermediary between moving valve components. Pressurized lubricant is introduced at strategic locations to form protective films on sealing surfaces, preventing direct contact between proppant particles and metal interfaces. The lubricant serves as a mediator that reduces friction and wear while allowing the valve to maintain its fluid transmission function.
2Reliability
If sealing surfaces are designed to prevent proppant entry, then valve reliability improves, but device complexity increases due to additional seat assemblies and lubrication systems
Solution Approach 1:
The seat assemblies are designed with nested structures where telescoping components fit within one another. Multiple sealing surfaces are concentrically arranged, with inner seats nested within outer seats. This nested configuration provides multiple sealing zones without requiring separate, complex assemblies for each sealing function, thereby improving reliability while controlling structural complexity.
Solution Approach 2:
The seat assemblies are designed to perform multiple functions simultaneously - providing sealing, supporting lubricant retention, and guiding valve movement. The telescoping seat structure serves both as a sealing mechanism and as a support for the lubricant system. This multi-functionality reduces the need for separate components, improving reliability without proportionally increasing device complexity.
3Reliability
If telescoping seat assemblies are used to reinforce sealing, then sealing reliability improves, but manufacturing complexity increases
Solution Approach 1:
The telescoping seat assemblies are designed to be nested during both operation and assembly. The nested configuration allows components to be telescoped into position without requiring complex alignment procedures or specialized assembly equipment. This approach reinforces sealing reliability while maintaining relative simplicity in the manufacturing and assembly processes.
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 solution effectively blocks proppant from entering the valve's interior, reducing wear and ensuring reliable operation by maintaining a fluid-tight seal and minimizing clogging, thus extending the valve's lifespan and ensuring consistent performance during fracturing operations.
Implementation Method 1
fluid pressure biases the first seat ring against the gate of a gate valve
Implementation Method 2
a valve insert system that retains a pressurized lubricant in an interior volume of the gate valve to block proppant from entering the interior volume
Data Source
AI summary
A system including a valve. The valve includes a valve body having an interior volume and a bore along a first axis. A stem extends along a second axis and a flow control element couples to the stem. The stem selectively moves the flow control element through the interior volume between a closed position and an open position relative to the bore. A valve insert system retains a pressurized lubricant in the interior volume.