WESTERN ATLAS INTERNATIONAL, INC.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
G01V GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS 7127
 
  
 
E21B EARTH OR ROCK DRILLING 2571
 
  
 
G06F ELECTRIC DIGITAL DATA PROCESSING 10437
 
  
 
F42B EXPLOSIVE CHARGES, e.g. FOR BLASTING; FIREWORKS; AMMUNITION 930
 
  
 
G01N INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES 6200
 
  
 
G01R MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES 4155
 
  
 
G01T MEASUREMENT OF NUCLEAR OR X-RADIATION 349
 
  
 
H01L SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR 3359
 
  
 
G01B MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS297
 
  
 
G01F MEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL; METERING BY VOLUME 257

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
6510796 Shaped charge for large diameter perforationsAug 14, 01Jan 28, 03[F42B]
6305289 Shaped charge for large diameter perforationsSep 30, 98Oct 23, 01[F42B]
6218662 Downhole carbon dioxide gas analyzerApr 23, 98Apr 17, 01[G01N]
6196319 Hydraulic sand removal toolJun 21, 99Mar 06, 01[E21B]
6176344 Method and system for determining the azimuth position and distance of a reflecting subsurface formationOct 27, 97Jan 23, 01[G01V]
6175536 Cross-well seismic mapping method for determining non-linear properties of earth formations between wellboresMay 01, 97Jan 16, 01[G01V]
6163153 Nuclear magnetic resonance pulse sequence for optimizing instrument electrical power usageSep 11, 98Dec 19, 00[G01R, G01V]
6124590 Method for determining thermal neutron capture cross-section of earth formations using measurements from multiple capture gamma ray detectorsJul 22, 98Sep 26, 00[G01V]
6121773 Longitudinal NMR well logging apparatus and methodOct 21, 97Sep 19, 00[G01V]
6116337 Articulated downhole electrical isolation jointJun 17, 98Sep 12, 00[H01R, E21B]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6987386 Determining resistivity of a geological formation using circuitry located within a borehole casingExpiredNov 01, 02Jan 17, 06[G01V]
6577144 Electrical voltages and resistances measured to inspect metallic cased wells and pipelinesExpiredMar 19, 01Jun 10, 03[G01B]
2002/0177,954 Processing formation resistivity measurements obtained from within a cased well used to quantitatively determine the amount of oil and gas presentAbandonedJul 10, 02Nov 28, 02[G01V]
2002/0043,977 Determining resistivity of a formation adjacent to a borehole having casing with an apparatus having all current conducting electrodes within the cased wellAbandonedJun 08, 01Apr 18, 02[G01V]
6353322 Method for automatically calibrating resistivity well logs for effects of change in wellbore diameter and circuit driftExpiredJun 09, 98Mar 05, 02[G01V]
6249122 Electrical voltages and resistances measured to inspect metallic cased wells and pipelinesExpiredNov 22, 99Jun 19, 01[G01R, G01V]
6246240 Determining resistivity of a formation adjacent to a borehole having casing with an apparatus having all current conducting electrodes within the cased wellExpiredMay 12, 99Jun 12, 01[G01V]
6216779 Downhole tool actuatorExpiredDec 17, 97Apr 17, 01[E21B]
6157195 Formation resistivity measurements from within a cased well used to quantitatively determine the amount of oil and gas presentExpiredMay 27, 97Dec 05, 00[G01V]
6111959 Sound spreaderExpiredOct 30, 97Aug 29, 00[H04R]
6095258 Pressure actuated safety switch for oil well perforatingExpiredAug 28, 98Aug 01, 00[F23Q, E21B, F42B]
6084408 Methods for acquisition and processing of nuclear magnetic resonance signals for determining fluid properties in petroleum reservoirs having more than one fluid phaseExpiredFeb 13, 98Jul 04, 00[G01V]
6060885 Method and apparatus for determining the resistivity and conductivity of geological formations surrounding a boreholeExpiredJun 13, 97May 09, 00[G01V]
6044325 Conductivity anisotropy estimation method for inversion processing of measurements made by a transverse electromagnetic induction logging instrumentExpiredJul 21, 98Mar 28, 00[G06F]
5999883 Conductivity anisotropy estimation method for inversion processing of measurements made by a transverse electromagnetic induction logging instrumentExpiredMar 17, 98Dec 07, 99[G06F, G01V]
5999884 Method for determining the axial position of formation layer boundaries using measurements made by a transverse electromagnetic induction logging instrumentExpiredMar 19, 98Dec 07, 99[G01V]
5992246 Underwater corrosion locaterExpiredApr 07, 98Nov 30, 99[G01M]
5995906 Method for reconciling data at seismic and well-log scales in 3-D earth modelingExpiredOct 03, 97Nov 30, 99[G06F]
5984009 Logging tool retrieval systemExpiredFeb 06, 98Nov 16, 99[E21B]
5973321 Method for determining multiple thermal neutron decay components from the capture gamma ray spectrum measured by a pulsed neutron instrumentExpiredJun 11, 97Oct 26, 99[G01V]

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