SCOTT DOWNING MILLER
Pilots at Canyonwood Dr, Mount Sharp, TX
License number
Texas A1301282
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
1207 N Canyonwood Dr, Mount Sharp, TX 78620
Professional information
Method And Apparatus For Estimating The Condition Of A Coating On An Underground Pipeline
US Patent:
7940062, May 10, 2011
Filed:
Dec 10, 2010
Appl. No.:
12/928427
Inventors:
Scott Downing Miller - Dripping Springs TX, US
Thomas James Davis - Issaquah WA, US
Jaime Paunlagui Perez - Dhahran, SA
Thomas James Davis - Issaquah WA, US
Jaime Paunlagui Perez - Dhahran, SA
Assignee:
Saudi Arabian Oil Company - Dhahran
International Classification:
G01R 27/08, G01R 31/08, G01N 27/00
US Classification:
324700, 324 712, 324527
Abstract:
Methods are provided for reducing interference from stray currents in buried pipelines/metal structures during MEIS testing or other current-sensing applications in the pipeline. Methods are also provided for measuring bulk complex electrical impedance between a buried pipe and the soil, thereby rendering an indication of the quality of the anti-corrosive coating. Methods are also provided for measuring the complex propagation constant of AC voltages propagating along an attenuative pipeline. This information is useful for assessing the general condition of the anti-corrosive coating involved, or to enhance MEIS inspection of the pipeline. Methods are also provided for enhancements to MEIS testing, including (a) canceling magnetometer offset effects associated with the Earth's magnetic field after the magnetometer is positioned for measurement, (b) implementing a separate sensing connection to the pipe so as to avoid interference from voltage loss in the pipe feed-line connection, (c) providing a power amplifier to excite the pipe with large-amplitude signals.
Method For Fabricating Pipeline Coating Samples Containing Synthetic Disbonds For Estimating A Condition Of A Coating Of An Underground Pipeline
US Patent:
7924032, Apr 12, 2011
Filed:
Dec 10, 2010
Appl. No.:
12/928423
Inventors:
Scott Downing Miller - Dripping Springs TX, US
Thomas James Davis - Issaquah WA, US
Jaime Paunlagui Perez - Dhahran, SA
Thomas James Davis - Issaquah WA, US
Jaime Paunlagui Perez - Dhahran, SA
Assignee:
Saudi Arabian Oil Company - Dhahran
International Classification:
G01R 27/08, G01N 27/00
US Classification:
324700, 324 712, 324527
Abstract:
A method for fabricating pipeline coating samples containing synthetic disbonds to be used in estimating a condition of a coating of an underground pipeline. The method includes the steps of providing a section of a pipe having a predetermined diameter and length; installing end caps on opposing ends of the pipe section, each end cap having an electrical connection extending therefrom; applying a material having a low dielectric coefficient around the pipe segment between the end caps to simulate an air-filled disbond; varying the coverage area of material to simulate various disbond sizes; and wrapping the pipe segment and end caps with tape to cover the material having a low dielectric coefficient.
Method And Apparatus For Estimating The Condition Of A Coating On An Underground Pipeline
US Patent:
7880484, Feb 1, 2011
Filed:
Nov 10, 2008
Appl. No.:
12/291530
Inventors:
Scott Downing Miller - Dripping Springs TX, US
Thomas James Davis - Issaquah WA, US
Jaime Paunlagui Perez - Dhahran, SA
Thomas James Davis - Issaquah WA, US
Jaime Paunlagui Perez - Dhahran, SA
Assignee:
Saudi Arabian Oil Company - Dhahran
International Classification:
G01R 27/08, G01R 31/08, G01N 27/00
US Classification:
324700, 324 712, 324527
Abstract:
Methods are provided for reducing interference from stray currents in buried pipelines/metal structures during MEIS testing or other current-sensing applications in the pipeline. Methods are also provided for measuring bulk complex electrical impedance between a buried pipe and the soil, thereby rendering an indication of the quality of the anti-corrosive coating. Methods are also provided for measuring the complex propagation constant of AC voltages propagating along an attenuative pipeline. This information is useful for assessing the general condition of the anti-corrosive coating involved, or to enhance MEIS inspection of the pipeline. Methods are also provided for enhancements to MEIS testing, including (a) canceling magnetometer offset effects associated with the Earth's magnetic field after the magnetometer is positioned for measurement, (b) implementing a separate sensing connection to the pipe so as to avoid interference from voltage loss in the pipe feed-line connection, (c) providing a power amplifier to excite the pipe with large-amplitude signals.
Method And Apparatus For Simulating Electrical Characteristics Of A Coated Segment Of A Pipeline
US Patent:
7876110, Jan 25, 2011
Filed:
Nov 10, 2008
Appl. No.:
12/291527
Inventors:
Scott Downing Miller - Dripping Springs TX, US
Thomas James Davis - Issaquah WA, US
Jaime Paunlagui Perez - Dhahran, SA
Thomas James Davis - Issaquah WA, US
Jaime Paunlagui Perez - Dhahran, SA
Assignee:
Saudi Arabian Oil Company - Dhahran
International Classification:
G01R 27/08, G01R 31/08, G01N 27/00
US Classification:
324700, 324 712, 324527
Abstract:
Method and apparatus for simulating electrical pipe-to-soil impedance of a coated segment of a pipeline includes simulating a current injection point to a buried pipe section, simulating a first output signal from a magnetometer positioned at a first location over the buried pipe section, simulating a second output signal from a magnetometer positioned at a second location over the buried pipe section, simulating bonding of pipe coating of the pipe section, and simulating soil resistance of a soil environment surrounding the buried pipe section. The invention includes both field-test simulation with calibration pipe samples, and bench-test simulation using electronic simulation of the pipe coating. The simulations may be used for test and general calibration of MEIS pipeline coating inspection systems.