Inventor
David Andrew Barfoot
Inventor
Houston, TX, US
Overview
Patents· 43 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
E21Bprimary
E21BEarth or rock drilling23%
G01VGeophysics23%
G01DMeasuring not specially adapted for a specific variable11%
G01HMeasurement of mechanical vibrations or ultrasonic, sonic or infrasonic waves10%
G01NInvestigating or analysing materials by determining their chemical or physical properties7%
G02BOptical elements, systems or apparatus5%
H04BTransmission5%
G01JMeasurement of intensity, velocity, spectral content, polarisation, phase or pulse characteristics of infrared, visible or ultraviolet light2%
G01LMeasuring force, stress, torque, work, mechanical power, mechanical efficiency, or fluid pressure2%
G01KMeasuring temperature2%
PatentTitleYear
11,111,780Distributed acoustic sensing system with phase modulator for mitigating faded channels202111,105,953Detecting changes in an environmental condition along a wellbore202111,048,017Cooled optical apparatus, systems, and methods202110,823,866Arrayed distributed acoustic sensing using single-photon detectors202010,794,177Mud pump stroke detection using distributed acoustic sensing202010,704,377Well monitoring with optical electromagnetic sensing system202010,612,371Partially reflective materials and coatings for optical communication in a wellbore202010,553,923Parallel plate waveguide within a metal pipe202010,444,391Noise removal for distributed acoustic sensing data201910,309,213Distributed optical sensing using compressive sampling201910,294,778Downhole optical communication201910,274,628Acoustic device for reducing cable wave induced seismic noises201910,267,141Distributed sensing systems and methods with efficient energy spectrum analysis201910,254,159Power limiting methods for use with optical systems in hazardous area locations201910,247,851Hybrid fiber optic cable for distributed sensing201910,247,840Optical well logging201910,234,311Modifying optical signals output by a wavelength division demultiplexer to detect subterranean physical properties201910,215,016Wellbore monitoring system using strain sensitive optical fiber cable package201910,215,015Strain sensitive optical fiber cable package for downhole distributed acoustic sensing201910,218,435Multiple polarization fiber optic telemetry201910,209,383Distributed acoustic sensing systems and methods employing under-filled multi-mode optical fiber201910,173,381Method of manufacturing a distributed acoustic sensing cable201910,120,101Methods and systems using an optical receiver and electro-optic methods to transmit data from integrated computational elements201810,101,182Interferometric high fidelity optical phase demodulation using 120 degree phase separation201810,018,036Distributed sensing systems and methods with I/Q data balancing based on ellipse fitting20189,976,920Detection of strain in fiber optics cables induced by narrow-band signals20189,864,095'Multiplexed microvolt sensor systems'20189,835,478Optical power limiting method using stimulated Brillouin scattering in fiber optic waveguides20179,766,371'Reflector configuration for distributed sensing in an optical fiber network using multiple sets of circulators'20179,719,846'Mud pulse detection using distributed acoustic sensing'20179,702,244'Distributed acoustic sensing gauge length effect mitigation'20179,617,847'Robust optical fiber-based distributed sensing systems and methods'20179,611,734'Connecting fiber optic cables'20179,557,195'Apparatus and method of multiplexed or distributed sensing'20179,500,767'Geo-locating positions along optical waveguides'20169,500,756'Geo-locating positions along optical waveguides'20169,429,466'Distributed acoustic sensing systems and methods employing under-filled multi-mode optical fiber'20169,316,762'Geo-locating positions along optical waveguides'20169,091,155'Reducing disturbance during fiber optic sensing'20158,897,608'High sampling resolution DTS system and method'20148,894,277'Calibrated fire detection cable'20147,139,422'Indentation hardness test system'20066,996,264'Indentation hardness test system'2006Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2006Patents assigned to LECO CORP (2)· patent assignee history
2006Based in St. Joseph, MI, US· patent location history
2014Patents assigned to BARFOOT DAVID (2)· patent assignee history
2014Patents assigned to SENSORTRAN INC (2)· patent assignee history
2014–2021Based in Houston, TX, US· patent location history
2014Based in Austin, TX, US· patent location history
2015–2021Patents assigned to HALLIBURTON ENERGY SERVICES INC (39)· patent assignee history
2019Patents assigned to HALLIBURTON ENERGY SERV INC (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HALLIBURTON ENERGY SERVICES INC | 39 | 2015–2021 |
| BARFOOT DAVIDself | 2 | 2014 |
| LECO CORP | 2 | 2006 |
| SENSORTRAN INC | 2 | 2014 |
| HALLIBURTON ENERGY SERV INC | 1 | 2019 |
Locations
| Location | Patents | Span |
|---|---|---|
| Houston, Texas, US | 40 | 2014–2021 |
| St. Joseph, MI, US | 2 | 2006 |
| Austin, Texas, US | 1 | 2014 |