Pivoting Linear Actuator Pumping Unit With Self-Lubricating Beam Drive

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Solution Overview

Problem

Existing downhole artificial lift systems face challenges in efficiently and reliably pumping hydrocarbons due to complex geometries and the need for regular lubrication of moving components, which can lead to corrosion and operational inefficiencies.

Innovation Solution

A linearly actuated, pivoting beam pumping unit with a pneumatically balanced linear actuator system that allows for angular articulation and integrated lubrication, utilizing a planetary roller nut assembly and a lubrication system that delivers lubricant through gravitational flow and pressure variations to ensure continuous lubrication of moving parts.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional complex geometries are used in downhole artificial lift systems, then pumping capability is achieved, but corrosion and operational inefficiencies increase due to the need for regular lubrication of moving components

Engineering Contradiction:

Improvepumping reliabilityVSAvoidcorrosion

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent replaces traditional mechanical linkages with a linear actuator system that directly positions the horse head, eliminating the need for complex mechanical geometries and reducing corrosion risks from lubrication requirements

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The system incorporates an integrated lubrication system with reservoir and delivery mechanisms that automatically provide lubrication to moving components, reducing the need for external maintenance and intervention

Inventive Principle:

Principle #25Self-service

2Ease of operation

If traditional mechanical linkages are used to position the horse head, then pumping motion is achieved, but device complexity increases due to multiple moving parts requiring lubrication

Engineering Contradiction:

Improvehorse head positioningVSAvoidmechanical linkage complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent substitutes traditional mechanical linkages with a linear actuator system that directly positions the horse head, eliminating complex intermediate mechanisms and reducing the number of moving parts requiring lubrication

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The linear actuator system integrates multiple functions including positioning, lubrication delivery, and structural support into a single unified mechanism, reducing overall device complexity

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Reliability

If regular lubrication is applied to moving components, then friction is reduced, but corrosion risk increases and maintenance requirements increase

Engineering Contradiction:

Improvecomponent functionalityVSAvoidcorrosion from lubrication

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The system incorporates an integrated lubrication system with reservoir and delivery mechanisms that automatically provide lubrication to moving components, ensuring continuous protection while minimizing external maintenance intervention

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent uses a pneumatically balanced linear actuator system with integrated lubrication delivery, utilizing fluid systems to both actuate components and deliver lubrication, reducing direct contact lubrication that causes corrosion

Inventive Principle:

Principle #29Pneumatics and hydraulics

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

Enhances the efficiency and reliability of hydrocarbon pumping by reducing corrosion and maintaining component functionality, while allowing for stable operation and reduced maintenance needs.

Implementation Method 1

pneumatically balanced linear actuator system that allows for angular articulation

Methodology Applied

Scientific EffectPneumatic pressure variations: Pressure Gradient

Implementation Method 2

a lubrication system that delivers lubricant through gravitational flow and pressure variations to ensure continuous lubrication of moving parts

Methodology Applied

Scientific EffectGravitational flow: Gravitation

Implementation Method 3

an upper bearing coupling the upper end of the linear actuator to the walking beam, such that the actuator can pivot with respect to the walking beam

Methodology Applied

Scientific EffectPivoting motion: Ball Bearing

Implementation Method 4

a lower bearing coupling the lower end of the linear actuator to the support base, such that the linear actuator can pivot with respect to the support base

Methodology Applied

Scientific EffectPivoting motion: Ball Bearing

Data Source

PatentUS20250341209A1Linearly actuated, pivoting, pumping unit

Publication Date: 2025.11.06 RAVDOS HOLDINGS INC

AI summary

A drive system for stroking a sucker rod that includes a support base; a walking beam; and a linear actuator adapted to expand and retract in length, where an upper bearing couples the upper end of the linear actuator to the walking beam and a lower bearing couples the lower end of the linear actuator to the support base so that the linear actuator can pivot with respect to both the walking beam and the support base as the linear actuator expands and retracts