Matches 351 - 400 out of 403 < 1 2 3 4 5 6 7 8 9 >
Match Document Document Title
3617867 METHOD AND APPARATUS FOR WELL LOGGING UTILIZING RESONANCE  
1. In well logging, the improvement which comprises producing a unidirectional magnetic field in a region including earth adjacent the well, simultaneously producing in the same region an...
3611118 MUD FILTRATE NUCLEAR MAGNETIC ANALYSIS  
An illustrative embodiment of the invention discloses a method that identifies gas, oil or water in earth formations penetrated by a borehole. A sample of the fluid drawn from the zone flushed by...
3597681 NUCLEAR MAGNETIC WELL LOGGING  
This invention relates to nuclear magnetic resonance well logging where hydrogen nuclei are polarized in a unidirectional field. Free precession of nuclei is established at a measuring level in the...
3593116 NUCLEAR MAGNETIC LOGGING APPARATUS COIL CONFIGURATION  
An illustrative embodiment of the invention selectively shortens the relaxation time of the signal from precessing protons observed with a nuclear magnetic logging tool. The region affected is...
3584293 ELEMENTS FOR STEERING THE BEAM OF HELICAL ANTENNA FOR USE IN A BOREHOLE PENETRATING AN EARTH FORMATION  
Active control elements for switching the radiation pattern of the helical antenna between the pancake beam and bidirectional pencil beam for use in mapping an earth formation penetrated by a...
3538429 COIL ASSEMBLY FOR NUCLEAR MAGNETISM WELL LOGGING  
3528000 NUCLEAR RESONANCE WELL LOGGING METHOD AND APPARATUS  
3508438 WELL LOGGING APPARATUS AND METHOD  
3484680 NUCLEAR MAGNETIC LOGGING SIGNAL VERIFICATION TECHNIQUE  
3483465 NUCLEAR MAGNETISM LOGGING SYSTEM UTILIZING AN OSCILLATED POLARIZING FIELD  
3479579 NUCLEAR MAGNETISM SIGNAL ANALYZING SYSTEM  
3462674 NUCLEAR MAGNETISM WELL LOGGING METHOD  
3456183 DETECTION OF OIL BY NUCLEAR MAGNETIC RESONANCE  
3439260 WELL LOGGING BY NUCLEAR MAGNETIC DETECTION OF C**13  
3437914 METHOD AND APPARATUS FOR REMOTE SENSING OF SUBSTANCES HAVING CHARACTERISTIC MAGNETIC RESONANCE PROPERTIES  
3434044 NUCLEAR PRECESSION WELL LOGGING METHOD  
3402344 Nuclear magnetism well logging method and apparatus  
3402343 High speed, high resolution, nuclear magnetism well logging apparatus having a plurality of receiving coils and an extended polarizing coil, and method for using same  
3395337 Apparatus and method for identifying substances  
3360717 Gyromagnetic resonance methods and apparatus  
3289072 Analysis of substances by measurement of nuclear magnetic relaxation times  
3275931 Method of nuclear magnetic resonance well logging  
3268800 Nuclear magnetic resonance well logging  
3252082 Method and composition for aiding nuclear magnetic well logging  
3250986 Magnetic resonance method and apparatus for analyzing substances  
3242422 Paramagnetic resonance precession method and apparatus for well logging  
3238446 Nuclear magnetic resonance technique for measurement of mixtures  
3234454 Nuclear magnetic resonance well logging  
3226632 Spin-echo well logging  
3213354 Nuclear precession well logging apparatus  
3213356 Methods for investigating the properties of fluid (materials) within porous media  
3213357 Earth formation and fluid material investigation by nuclear magnetism relaxation rate determination  
3204178 Amplifier input control circuits  
3199022 Penetration control for nuclear magnetism well logging  
3188556 Nuclear magnetic logging method  
3188557 Nuclear magnetic resonance switching circuitry  
3179878 Method and apparatus for the nondestructive testing of materials  
3135912 Nuclear magnetism well logging  
3128425 Magnetic resonance systems  
3113087 Methods and apparatus for the investigation of materials by radiation  
3096476 Overhauser effect well logging  
3083335 Magnetic resonance methods and apparatus  
3060371 Geological prospecting process and apparatus  
3048773 Fluid remnant magnetization tester  
3044010 Formation liquid logging  
3042855 Method of and apparatus for reducing remnant magnetic fields in nuclear magnetism well logging  
3020469 Borehole logging method and apparatus  
3004212 Induction and nuclear magnetism logging  
2999204 Method and means for reducing inhomogeneities in nuclear magnetism well logging  
2998565 Switching circuit  
Matches 351 - 400 out of 403 < 1 2 3 4 5 6 7 8 9 >