Dry Product Additive Unit Pneumatic Conveying

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Solution Overview

Problem

Current well service equipment lacks an efficient system for introducing dry chemicals into well fluids during drilling, completion, and production operations, particularly in maintaining atmospheric pressure and ensuring accurate dosing and transportation of these chemicals.

Innovation Solution

A dry product additive system comprising a skid, hopper, feeder system, pickup funnel, supply pump, and eductor assembly, which uses a suction and motive fluid system to transport dry chemicals from the hopper to the pickup funnel and then into the wellbore, with features like load cells for weight monitoring and a control system for automated operation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If dry chemicals are introduced into well fluids using conventional methods, then chemical dosing is achieved, but the system lacks efficiency and accuracy in transportation and dosing

Engineering Contradiction:
Improvechemical dosing efficiencyVSAvoiddosing accuracy
Core Design Contradiction:
ProductivityVSMeasurement precision

Solution Approach 1:

The patent employs a pneumatic conveying system where compressed air is used to transport dry chemicals from storage containers through pipelines to the injection point. This pneumatic method replaces conventional mechanical handling, achieving both efficient transportation and precise dosing control through regulated air pressure and flow rate.

Inventive Principle:
Principle #29Pneumatics and hydraulics

Solution Approach 2:

The system utilizes controlled changes in air pressure and flow parameters to regulate the dosing accuracy of dry chemicals. By adjusting pneumatic parameters, the system achieves precise chemical introduction while maintaining high productivity in well service operations.

Inventive Principle:
Principle #35Parameter changes

2Measurement precision

If a complex system is used to transport dry chemicals, then dosing accuracy improves, but device complexity increases

Engineering Contradiction:
Improvedosing accuracyVSAvoidsystem complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The pneumatic conveying system serves multiple functions: it transports dry chemicals from storage, controls dosing accuracy, and injects chemicals into well fluids all through a single integrated system. This multi-functionality reduces the need for separate handling equipment, maintaining dosing precision while minimizing overall system complexity.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The system incorporates automatic control mechanisms where the pneumatic conveying process self-regulates chemical flow and dosing through pressure differential control, reducing the need for complex manual intervention systems and simplifying operation while maintaining accuracy.

Inventive Principle:
Principle #25Self-service

3Ease of manufacture

If dry chemicals are handled without atmospheric pressure maintenance, then handling is simpler, but chemical contamination and loss increase

Engineering Contradiction:
Improvehandling simplicityVSAvoidchemical loss
Core Design Contradiction:
Ease of manufactureVSLoss of substance

Solution Approach 1:

The pneumatic conveying system acts as an intermediary that maintains atmospheric pressure conditions throughout the chemical handling process. Compressed air serves as the medium to transport chemicals while maintaining pressure equilibrium, preventing contamination and loss without requiring complex vacuum or pressure-controlled environments.

Inventive Principle:
Principle #24Intermediary (Mediator)

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 system ensures efficient and accurate introduction of dry chemicals into well fluids, maintaining atmospheric pressure and enabling precise dosing and transportation, enhancing operational efficiency and safety during well service operations.

Implementation Method 1

The present disclosure provides for a dry product additive system that may include an eductor assembly. The eductor assembly may include a suction inlet, a motive inlet, and an outlet.

Methodology Applied
Scientific EffectVenturi effect: Venturi Effect

Implementation Method 2

The motive inlet may be coupled to the supply pump by a motive fluid hose.

Methodology Applied
Scientific EffectHydraulic pressure: Pressure Increase

Data Source

PatentUS11713633B2Dry product additive unit
Publication Date: 2023.08.01 STEWART & STEVENSON LLC
  • US11713633B2 patent drawing
  • US11713633B2 patent drawing
  • US11713633B2 patent drawing

AI summary

A dry product additive system includes a skid, a hopper, a pickup funnel, a feeder system, a supply pump, and an eductor assembly. The feeder system may be configured to transport product from the hopper to the pickup funnel. The eductor assembly including a suction inlet, a motive inlet, and an outlet. The suction inlet may be coupled to the pickup funnel by a suction hose. The motive inlet may be coupled to the supply pump by a motive fluid hose.