Inventor

BARFOOT DAVID ANDREW

US32 patents

⚠️ This page may combine multiple inventors who share the name “BARFOOT DAVID ANDREW”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

BARFOOT DAVID ANDREW

HALLIBURTON ENERGY SERVICES INC

Reflector configuration for distributed sensing in an optical fiber network using multiple sets of circulators

Noise removal for distributed acoustic sensing data

Distributed optical sensing using compressive sampling

Mud pulse detection using distributed acoustic sensing

Apparatus and method of multiplexed or distributed sensing

Distributed sensing systems and methods with efficient energy spectrum analysis

Reducing disturbance during fiber optic sensing

Distributed sensing systems and methods with I/Q data balancing based on ellipse fitting

Geo-locating positions along optical waveguides

Gauge length effect and gauge length conversion

Connecting fiber optic cables

Arrayed distributed acoustic sensing using single-photon detectors

Distributed acoustic sensing system with phase modulator for mitigating faded channels

Gauge length effect and gauge length conversion

Cooled single-photon detector apparatus and methods

Cooled optical apparatus, systems, and methods

Acoustic device for reducing cable wave induced seismic noises

Distributed acoustic sensing system with a polarization control device for improving signal-to-noise ratio

Geo-locating positions along optical waveguides

Mitigation of attenuation for fiber optic sensing during cementing

Distributed sensing systems and methods with spatial location correlation

Partially reflective materials and coatings for optical communication in a wellbore

Detection of strain in fiber optics cables induced by narrow-band signals

Multiplexed microvolt sensor systems

Detecting changes in an environmental condition along a wellbore

Detecting changes in an environmental condition along a wellbore

Methods and systems using an optical receiver and electro-optic methods to transmit data from integrated computational elements

Parallel plate waveguide within a metal pipe

Multiple polarization fiber optic telemetry

Mud pump stroke detection using distributed acoustic sensing

LECO CORP

Indentation hardness test system

Indentation hardness test system