Conical Downhole Pump Valve Assembly for Ball Chatter Reduction
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Solution Overview
Problem
Downhole pump valve assemblies in reciprocating pump systems face issues with turbulence, ball chatter, cage wear, and gas breakout due to high fluid velocities and pressure drops, which affect the efficiency and reliability of fluid extraction.
Innovation Solution
A valve assembly design featuring a conical body with a base for engaging the floating check ball, a tip extending away, and a conical side tapering from the base to the tip, combined with flutes and axial rails, which diverges to create a smooth flow passage and reduce turbulence, and a ball seat that helps stabilize the ball, reducing pressure drop and velocity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conventional valve assembly with cylindrical stop and simple flow passage is used, then the structure is simple and easy to manufacture, but high fluid velocities cause turbulence, ball chatter, and gas breakout
Solution Approach 1:
The patent applies curvature by replacing the conventional cylindrical ball stop with a conical body having a tapered surface. This conical geometry smoothly guides the fluid flow and ball movement, eliminating turbulence and ball chatter while maintaining manufacturing feasibility through standard machining operations.
2Ease of manufacture
If the flow passage is simplified with cylindrical holes through the stop, then manufacturing is easier, but pressure drop and fluid velocity increase causing harmful effects
Solution Approach 1:
The conical flow passage with tapered walls replaces the cylindrical holes, creating a gradual expansion that reduces fluid velocity and pressure drop. The curved conical surface smoothly directs flow, eliminating turbulence and gas breakout while remaining manufacturable through conventional tapering processes.
3Reliability
If axial rails are added to support the ball, then ball stability improves, but device complexity increases
Solution Approach 1:
The patent merges the ball support function into the conical body itself. The tapered conical surface provides both flow guidance and ball support through its geometry, eliminating the need for separate axial rails while maintaining ball stability and reducing overall device complexity.
4Adaptability or versatility
If conventional valve assembly components are used, then standardization is maintained, but cage wear and ball chatter occur due to turbulence
Solution Approach 1:
The conical body with tapered surface replaces conventional cylindrical components, providing smooth flow guidance that eliminates turbulence and ball chatter. This geometric modification reduces cage wear while maintaining adaptability to standard valve assembly configurations and ball sizes.
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 design reduces turbulence, pressure drop, and ball chatter, enhancing the stability of the valve assembly and reducing gas breakout, leading to improved fluid flow and extraction efficiency.
Implementation Method 1
reducing pressure drop and velocity
Implementation Method 2
reduce turbulence
Data Source
AI summary
A downhole pump used for a reciprocating pump system includes a barrel coupling to a tubing string and having a standing valve and includes a plunger coupling to a rod string and having a traveling valve. One or both of the valves can include an assembly comprising a housing, an insert, a ball, and a seat. The insert allowing for flow therethrough defines a ball stop at one end has a ball passage at the other end. The insert positions in flow passage of the housing, and one of the ends engages a shoulder in the passage. The insert includes sidewalls and a conical body to reduce turbulence, flow velocity, gas breakout, ball chatter, and the like.