Inventor

Dan M. Arnold

Inventor

Houston, TX, US

Overview

1976–1998

Patent span

Physics

Primary field (CPC G)

Patents· 53 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

G01Vprimary

G01VGeophysics36%

E21BEarth or rock drilling23%

G01FMeasuring volume, volume flow, mass flow or liquid level18%

G01NInvestigating or analysing materials by determining their chemical or physical properties9%

B61FRail vehicle suspensions, e.g. underframes, bogies or arrangements of wheel axles3%

F16CShafts3%

G01PMeasuring linear or angular speed, acceleration, deceleration, or shock3%

G01TMeasurement of nuclear or x-radiation2%

F16LPipes1%

G01RMeasuring electric variables1%

PatentTitleYear

5,810,485'Auxiliary bearing system'1998 5,806,988'Auxiliary bearing system'1998 5,642,944'Auxiliary bearing system'1997 5,483,063'Zero-spaced epithermal neutron moisture detection system'1996 5,461,909'Oxygen activation method for quantitative water flow measurements within and behind well bore casing'1995 5,077,471'Method and apparatus for measuring horizontal fluid flow in downhole formations using injected radioactive tracer monitoring'1991 5,045,692'Simultaneous fluid flow and fluid density measurements using rotameter and nuclear technology'1991 5,021,652'Directional gamma ray spectrometer'1991 4,861,986'Tracer injection method'1989 4,825,071'Gamma ray borehole logging method and apparatus having compensation for borehole attenuation effects'1989 4,604,522'Method and apparatus for logging a borehole employing dual radiation detectors'1986 4,585,939'Multi-function natural gamma ray logging system'1986 4,574,193'Method for logging fluid flow rate, water fraction, and/or salinity of water flowing into a well'1986 4,529,877'Borehole compensated density logs corrected for naturally occurring gamma rays'1985 4,501,964'Borehole compensated oxygen activation nuclear well logging'1985 4,495,805'In-situ permeability determining method'1985 4,493,998'Method for monitoring drilling materials for gamma ray activity'1985 4,459,479'Determination of casing thickness using a natural gamma ray spectroscopy technique'1984 4,439,676'Natural gamma ray logging with borehole effect compensation'1984 4,436,996'Borehole compensated KUT log'1984 4,424,444'Method for simultaneous measurement of borehole and formation neutron lifetimes'1984 4,365,154'Detection of impurities in a fluid containing free gas using nuclear techniques'1982 4,352,288'Measurement of salt content in petroleum flow lines'1982 4,297,575'Simultaneous gamma ray measurement of formation bulk density and casing thickness'1981 4,287,415'Measurement of flowing water salinity within or behind wellbore casing'1981 4,282,760'Multiphase fluid flow meter (D#76,244)'1981 4,272,982'Fluid flow meter for mixed liquid and gas'1981 4,233,508'Water injection profiling'1980 4,228,350'Method and apparatus for measuring underground fluid flow characteristics'1980 4,209,695'Detection of impurities in fluid flowing in refinery pipeline or oil production operations using nuclear techniques'1980 4,200,789'Measuring oil and water cuts in a multiphase flowstream with elimination of the effects of gas in determining the liquid cuts'1980 4,190,768'Determining the water cut and water salinity in an oil-water flow stream by measuring the sulfur content of the produced oil'1980 4,189,638'Water injection profiling by nuclear logging'1980 4,169,979'Method and apparatus for measuring azimuth and speed of horizontal fluid flow by a borehole'1979 4,151,413'Method of measuring horizontal fluid flow behind casing in subsurface formations with sequential logging for interfering isotope compensation and increased measurement accuracy'1979 4,144,754'Multiphase fluid flow meter'1979 4,137,452'Method of measuring horizontal fluid flow in cased off subsurface formations with manganese compensation'1979 4,102,185'Acoustic-nuclear permeability logging system'1978 4,076,980'Radioactive well logging to measure earth formation fluid permeability by electrohydraulic induced flow of radiation activated fluids'1978 4,071,757'Detection of behind casing water flow at an angle to the axis of a well borehole'1978 4,071,755'Method for in situ evaluation of the source rock potential of earth formations'1978 4,057,720'Behind casing fluid flow detection in producing wells using gas lift'1977 4,051,368'Method of measuring horizontal flow speed of fluids in earth formations penetrated by a wellborehole'1977 4,047,028'Resolution of through tubing fluid flow and behind casing fluid flow in multiple completion wells'1977 4,035,640'Behind casing water flow detection using pulsed neutron oxygen activation'1977 4,032,781'Well fluid production profiling using an oxygen activation flow meter'1977 4,032,780'Behind casing water flow detection using continuous oxygen activation'1977 4,032,779'Behind casing water volume flow rate measurement using concentric gamma ray detectors'1977 4,032,778'Behind casing water volume flow rate measurement using gamma ray spectral degradation'1977 4,002,904'Simultaneous thermal neutron lifetime and boron content well log'1977 3,988,581'Radioactive well logging system with shale (boron) compensation by gamma ray build-up'1976 3,979,300'Three frequency modulated combination thermal neutron lifetime log and porosity'1976 3,940,611'Method for determining thermal neutron decay times of earth formations'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–1985Patents assigned to TEXACO INC (34)· patent assignee history

1976–1989Based in Houston, TX, US· patent location history

1981–1986Patents assigned to HALLIBURTON CO (9)· patent assignee history

1989–1995Patents assigned to HALLIBURTON LOGGING SERVICES (6)· patent assignee history

1991–1998Based in Katy, TX, US· patent location history

1996Patents assigned to PHYSICS INC (1)· patent assignee history

1997–1998Patents assigned to DUBLIN JR W L (3)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
TEXACO INC	34	1976–1985
HALLIBURTON CO	9	1981–1986
HALLIBURTON LOGGING SERVICES	6	1989–1995
DUBLIN JR W L	3	1997–1998
PHYSICS INC	1	1996

Locations

Location	Patents	Span
Houston, Texas, US	45	1976–1989
Katy, Texas, US	8	1991–1998