Gas-Driven Compressor With Shuttle-Valve Flow Reversal for Reinjection

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Solution Overview

Problem

Conventional fluid control systems, such as valves and regulators, require low-pressure gas operation which cannot be reinjected into the system, necessitating additional compression infrastructure or venting to atmosphere, posing environmental and logistical challenges, especially in remote locations.

Innovation Solution

A gas-driven compressor system utilizing a shuttle valve and piston mechanism to repressurize low-pressure process gas, allowing its reinjection into the system, with optional two-stage compression to enhance output pressure.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If low-pressure gas is used to operate fluid control systems, then the control systems can function properly, but the low-pressure gas cannot be reinjected into the system requiring additional compression infrastructure or venting to atmosphere

Engineering Contradiction:

Improvefluid control system operationVSAvoidcompression infrastructure

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent combines the low-pressure gas usage function with the compression/reinjection function into a single integrated system. The compressor uses the low-pressure process gas itself as the driving medium to power the piston mechanism, eliminating the need for separate compression infrastructure while enabling full reinjection of the gas back into the fluid system.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The system uses the low-pressure process gas to power itself - the gas is used to drive the piston through pressure differential, and then the same gas is compressed and reinjected back into the system. This self-service approach eliminates external compression requirements and enables complete gas utilization without venting.

Inventive Principle:

Principle #25Self-service

2Device complexity

If low-pressure gas is vented to atmosphere, then the system can operate without additional infrastructure, but environmental impact increases and gas is lost

Engineering Contradiction:

Improveinfrastructure requirementsVSAvoidenvironmental impact

Core Design Contradiction:

Device complexityVSObject-generated harmful factors

Solution Approach 1:

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

Instead of discarding the low-pressure gas to atmosphere, the system recovers it by compressing it back to high pressure and reinjecting it into the fluid system. The shuttle valve and piston mechanism enable complete recovery and reuse of the process gas, eliminating environmental discharge.

Inventive Principle:

Principle #34Discarding and recovering

3Productivity

If a shuttle valve and piston mechanism are used to repressurize low-pressure gas, then gas can be reinjected into the system, but device complexity increases

Engineering Contradiction:

Improvegas reinjection capabilityVSAvoidcompressor system structure

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent employs pneumatic principles where low-pressure process gas is used to drive the piston through pressure differential. The shuttle valve directs the gas flow to appropriate chambers, and the piston converts this pneumatic pressure into mechanical motion for compression, enabling efficient gas reinjection using fluid pressure principles.

Inventive Principle:

Principle #29Pneumatics and hydraulics

Solution Approach 2:

The system uses dynamic reciprocating motion of the piston driven by alternating pressure differential across it. The shuttle valve dynamically switches gas flow direction based on piston position, creating a self-sustaining oscillating compression cycle that enables continuous gas reinjection without complex control mechanisms.

Inventive Principle:

Principle #15Dynamics

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 effectively pressurizes and reinjects low-pressure gas back into the fluid system without venting to atmosphere, optimizing fluid management and reducing environmental impact.

Implementation Method 1

a first head portion movable within the first piston cavity by the pressurized inlet flow

Methodology Applied

Scientific EffectPressure differential: Pressure Gradient

Implementation Method 2

a second head portion movable within the second piston cavity by the movement of the first head portion within the first piston cavity to compress a fluid in the second piston cavity

Methodology Applied

Scientific EffectCompression: Compression

Data Source

PatentEP4636248A1Systems and methods for a gas-driven compressor

Publication Date: 2025.10.22 EMERSON PROCESS MANAGEMENT REGULATOR TECHNOLOGIES INC

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AI summary

A gas-driven compressor system (100) includes a compressor body (102) with first and second piston cavities (126, 155) and a shuttle valve cavity (132). The system has a low pressure outlet and high pressure inlet (106) communicating with the first piston cavity via the shuttle valve cavity, and compressor inlet/outlet ports (148, 115) communicating with the second piston cavity. A shuttle valve (110) moves between first and second positions within its cavity. The piston has a first head portion movable by pressurized inlet flow and a second head portion that compresses fluid in the second cavity. The piston selectively directs flow from the high pressure inlet to either side of the shuttle valve cavity based on piston position, thereby directing pressurized flow to either side of the first head portion. This arrangement powers the reciprocating movement of the piston.